Possible identity of this metal sample is gold
Here given data is unknown metal mass=14.8 g sample displaces=0.767 mL of water we have to find density of given metal=?
Density=mass/volume
Here mass=14.8 g and volume=0.767
Density=mass/volume
Density=14.8g/0.767
= 19.29≈19.30 means 19.3
So in the listed metal above answer are matched with gold
Therefore gold has 19.3 density.
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CERER science Q= how is kinetic energy related to temperature?
C
E
R
E
R
Need this ASAP LIKE NOW
A substance's temperature in physics' laws, is directly related to the average kinetic energy of its particles. Because the particles' mass is constant, they must travel faster as the temperature rises.
What is Kinetic Energy?In physics, the kinetic energy of an object is the energy it possesses as a result of its motion. It is defined as the amount of work required to accelerate a body of a given mass from rest to a given speed.
The body retains its kinetic energy, having acquired it during acceleration, until its speed changes.
Kinetic energy is present in an accelerating ball, a walking human, and electromagnetic radiation like light. Another type of kinetic energy is the energy associated with the continuous, random bouncing of atoms or molecules.
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Explain how you might determine your density.
To determine the density of a living body, divide the body mass by the volume of the body.
What is density?"Density is the mass per unit volume". It is a scalar quantity. It is referred to by d and the symbol for density is given as rho, a Greek symbol. Density is calculated as mass divided by volume.
To calculate the density of a living body. Just calculate the mass of the body and the total volume of the body and divide these entities. Humans have a density approx to 1000 kg/m3
The formula is
d = m / v
Thus, to calculate density, the body mass is divided by the body's volume.
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Which planet is believed to have a changing atmosphere
Answer: Uranus and neptune
Explanation:
Does a reaction occur when aqueous solutions of manganese(II) iodide and sodium nitrate are combined?
If a reaction does occur, write the net ionic equation.
A chemical reaction does occur when an aqueous solutions of lead(II) nitrate and nickel(II) chloride are combined.
The correct answer choice to the above is option a.
This means that when an aqueous solutions of lead(II) nitrate and nickel II chloride are combined, it gives lead II chloride and nickel trixonitrate IV
The net ionic equation is given below:
Pb(NO3)2 + NiCl2 ----- PbCl2 + Ni(NO3)2
Pb2+ NO3- + Ni2+Cl- ----- Pb2+ Cl- + Ni2+ NO3-
What are chemical reactions?Chemical reactions are those reactions whereby substances combine together to form other substances. The substances which combine together are called the reactants while the new substance formed is known as product.
So therefore, a chemical reaction does occur when an aqueous solutions of lead(II) nitrate and nickel(II) chloride are combined.
Complete question:
Does a reaction occur when aqueous solutions of lead(II) nitrate and nickel(II) chloride are combined?
a. yes
b. no
If a reaction does occur, write the net ionic equation.
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QUESTION 1
Sugar is blank meaning it can readily absorb moisture.
Answer:
sugar is hygroscopic
Explanation:
sugar is hygroscopic
A sample of baby oil has a volume of12 mL and a mass of 10 g. What is the density of the baby oil?
The density of the baby oil, ρ = 0.833 g/ml.
Equation :density = mass / volume
ρ = m / V
where,
ρ is density
m is mass
V is volume
So putting the values in the formula,
ρ = 10g / 12ml
ρ = 0.833 g/ml
What is density, mass and volume?The three most fundamental characteristics of an object are mass, volume, and density. Volume indicates something's size, mass indicates how heavy it is, and density is calculated as mass divided by volume. Although you deal with mass and volume on a daily basis, the concept of density is less clear-cut and requires careful consideration.
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2. True or False - If you were
measuring the distance from Fresno,
CA to Miami, FL, the most reasonable
unit of measurement would be
decimeters. Explain your answer. (2
pts)
[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]
The given statement is false ~
As we know, large distances can only be measured by using larger units like kilometers, miles, or other units, and it's much convenient. so, it's so different if we were to measure that distance using small unit like " decimeters "
I hope that was reasonable for you to understand, let me know if you have any questions ~
One DNA strand in the DNA double helix serves as a template for the production of mRNA, which is a complementary copy of the DNA strand. Therefore the sequence of the DNA will determine the sequence of the mRNA. Using the "template strand" below complete the diagram below by inserting the correct complementary bases into the sequence.
Template strand : GGT - TTT - TGG - GTG - ACC - AAA
Complementary strand : _______________________
I need help with the complementary strand please help.
The complementary strand is: CCA - AAA - ACC - CAC - TGG - TTT
How does DNA transcription occur?DNA transcription is the process by which information stored in DNA is passed to a protein through RNA. Then the process occurs in which the information from the DNA is passed to the RNA using the enzyme RNA polymerase which will form an mRNA that will be faithful to the information found in the DNA and through this mRNA the protein will be formed thanks to ribosomes.
RNA polymerase is then the enzyme that will form the mRNA from a DNA strand that will be the template.
Therefore, we can confirm that the complementary strand is: CCA - AAA - ACC - CAC - TGG - TTT
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A 125-g piece of metal is heated to 288c and dropped into 85.0 g of water at 12.0 c tge metal and water come to the same temperature of 24.0 c what is the specific heat, in j/g c, of the metal?
The specific heat is 0.134 J/gC
This is example in which energy (in the form of heat) is conserved. Your metal is at a higher temperature than the water so it will lose heat, which we can calculate using q=mass x specific heat capacity x ΔT. The heat is then transferred to the water. One way to set up your calculation is: q metal + qH2O = 0
mass metal = 125 g
specific heat = x
ΔT = 24 C - 288 C
mass water = 88 g
specific heat = 4.184 J/gC
ΔT = 24C-12C
125 g(x)(-264 C) + 88g(4.184J/gC)(12C)=0
-3300x + 4418.304 = 0
x = 0.134 J/gC
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What is specific heat capacity?
A. The energy absorbed or given off in a chemical reaction
B. The energy stored within the chemical bonds of a substance
C. The energy needed to change the temperature of a substance
D. The energy required to completely melt 1 g of a substance
Answer:
c
Explanation:
it is the amount if energy required to move the temoreture of a substance by one 1 Celsius degree
The energy needed to change the temperature of a substance. Option C is correct.
Specific heat capacity is a physical property of a substance that represents the amount of energy required to change the temperature of a unit mass (usually 1 gram) of the substance by one degree Celsius or one Kelvin. It is expressed in units of joules per gram per degree Celsius (J/g°C) or joules per gram per Kelvin (J/g K).
Specific heat capacity is essential in understanding how different substances respond to changes in temperature. Substances with higher specific heat capacities require more energy to increase their temperature, and conversely, they release more energy when their temperature decreases. This property also determines how well a substance can store or release thermal energy.
The formula to calculate the heat absorbed or released by a substance during a temperature change is Q = mcΔT, where Q is the heat energy absorbed or released, m is the mass of the substance in grams, c is the specific heat capacity of the substance in J/g°C or J/g K, and ΔT is the change in temperature in degrees Celsius or Kelvin.
For example, water has a relatively high specific heat capacity (4.18 J/g°C), meaning it can absorb or release a significant amount of energy without experiencing a significant temperature change. This property is why water helps to regulate temperature in natural environments, and it makes water an excellent coolant and heat reservoir in various industrial and biological processes.
In summary, specific heat capacity is a crucial factor in understanding how substances respond to changes in temperature and how they store and release thermal energy. It plays a significant role in various fields, including chemistry, physics, and engineering.
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Can the melting point of a substance be used as a criterion of purity?
Yes. The melting point of a substance can be used as a criterion of its purity.
The melting point of substancesThe melting point of a solid substance is the temperature at which the molecules of the solid melt to become liquid.
The melting point of a solid substance can be used as a criterion to judge how pure the substance is.
Pure solids have sharp or narrow melting points. On the other hand, impure solids melt over a wide range of temperatures, as high as 5 degrees Celsius.
The presence of impurity also lowers the melting point of substances. For example, pure sugar melts at 186 degrees Celsium while sugar with impurity will melt at lower temperatures but over a wide range.
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atoms with _____ number of protons and _____ number of neutrons tend to be the most stable. A) odd, odd B) odd, even C) even, odd D) even, even
Atoms with an even number of protons and an even number of neutrons tend to be the most stable. Thus, the correct option for this question is D.
What are Protons?Protons may be defined as the type of subatomic particles which are considerably present within the nucleus of an atom along with neutrons. These subatomic particles are positively charged in nature. It was thought that Ernest Rutherford discovered these particles.
The oddness of the number of protons and neutrons leads to lowering the nuclear binding energy of an atom. The number of protons indicates the atomic number of an atom, while the number of neutrons impacts the charge of an atom.
Therefore, atoms with an even number of protons and an even number of neutrons tend to be the most stable. Thus, the correct option for this question is D.
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If the barometric pressure (Patm) is 766 Torr and h = 141 mmHg, then what is the pressure of the gas in the bulb? Please express your answer in units of atmospheres. The pressure is. atm.
The Pressure of gas in the bulb = 1392.70 atm
1) The barometric pressure is also called atmospheric pressure as it is the pressure with in the earth.
The SI unit of this pressure is = pascals.2) The given values are
The barometric pressure = 766 Torr = 1.00789 atm (convert the value of torr into the standard pressure that is atm)
The height of Barometer (in mercury)= 141 mmHg
Pressure of a gas in bulb = need to find out.
The formulae used is
P=ρ×g×h, where:
P = pressure of gas (unknown )
g = acceleration due to gravity = 9.8m/s²
h = Hight of the liquid
By substituting all the values in above equation,
P = 1.00789×9.8× 141
P = 1392.70 atm
so the The barometer whose barometric pressure is 1392.70 atm atm exerted by the mercury and the height of the liquid is 141 mmHg.
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Balance each of the following chemical equations. (Use the lowest possible coefficients.) (a) C4H10(g) + O2(g) → CO2(g) + H2O(g) (b) Cr(s) + H2SO4(aq) → Cr2(SO4)3(aq) + H2(g) (c) Cl2O7(g) + Ca(OH)2(aq) → Ca(ClO4)2(aq) + H2O(l) (d) PBr3(l) + H2O(l) → H3PO3(aq) + HBr(g) (e) (NH4)2CO3 + CaSO4 → (NH4)2SO4 + CaCO3 (f) K2SO4(aq) + BaCl2(aq) → BaSO4(s) + KCl(aq) (g) C(s) + Fe2O3(l) → Fe(l) + CO(g) (h) HCl(aq) + FeS(s) → FeCl2(aq) + H2S(g)
a. 2C₄H₁₀(g) + 13O₂(g) → 8CO₂(g) + 10H₂O(g)
The coefficient of CO2 in the above equation is 8.
b. 2Cr(s) + 3H₂SO₄(aq) → Cr₂(SO₄)₃(aq) + 3H₂(g)
c. Cl₂O₇(g) + Ca(OH)₂(aq) → Ca(ClO₄)₂(aq) + H₂O(l)
this equation is already balanced
d. PBr₃(l) + 3H₂O(l) → H₃PO₃(aq) + 3HBr(g)
e. (NH₄)₂CO₃ + CaSO₄→ (NH₄)₂SO₄ + CaCO₃
this equation is already balanced
f. K₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2KCl(aq)
g. C(s) + 3Fe₂O₃(l) → 2Fe(l) + 3CO(g)
h. 2HCl(aq) + FeS(s) → FeCl₂(aq) + H₂S(g)
A chemical formula describes the changes that occur during a chemical reaction. It has the general form: reactant → product. All chemical formulas must be balanced. This means that there must be an equal number of each type of atom on each side of the arrow. A factor of is used to balance the chemical formula.
A coefficient is a numerical value that precedes a chemical symbol or formula. This indicates that a number of atoms or molecules of matter are involved in the reaction.
To balance a chemical formula, prefix the symbol or formula with the necessary coefficients so that the same number of each type of atom occurs in both reactants and products.
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How many nonbonding pairs does the molecule H₂ have?
The electron dot structure for H2O shows that the O has 2 lone pairs of electrons. So the answer would be 4 non bonding electrons are in a water molecule.
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Convert 3.974×10^10 grams to mg
Answer:
3.974 x 10¹³ mg
Explanation:
To find the amount in milligrams (mg), you need to multiply the given number by the conversion, 1,000 mg/g. This conversions exists as a ratio which compares the amount of mg per every 1 g. It is important to arrange the ratio in a way that allows for the cancellation of units (grams should be in the denominator).
1,000 mg = 1 g
3.974 x 10¹⁰ g 1,000 mg
----------------------- x ------------------- = 3.974 x 10¹³ mg
1 g
is hydrogen explosive? if so what makes it explosive?
please explaen
Hydrogen is explosive, because when it is exposed to air, it reacts with oxygen, releasing heat and forms either water or hydrogen peroxide.
What is hydrogen?Hydrogen is the chemical element with the symbol H and atomic number of 1.
Is hydrogen explosive?Yes hydrogen is explosive. When hydrogen mixes with oxygen in the air, it forms an explosive mixture.
When molecular hydrogen and oxygen are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide.
The reaction equation is given as;
H₂ + O₂ → H₂O₂ + heat
This reaction is exothermic because it releases large amount of heat to the surrounding.
Thus, hydrogen is explosive, because when it is exposed to air, it reacts with oxygen, releasing heat and forms either water or hydrogen peroxide.
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Which characteristic property of the substances in the solutions does thin-
layer chromatography utilize?
O molecular polarity
O conductivity
Odensity
particle size
The characteristic property of the substances in the solutions does thin-layer chromatography utilize is molecular polarity. The correct option is A.
What is thin layer chromatography?Thin layer chromatography s used to separate the molecules on the basis of their polarity. It is done on a thin sheet of aluminum foil or glass or plastic in which the molecules are poured, and then it is covered by a sheet of material.
When solvents travel through the sheet, the molecules travel at different speeds or paces.
Thus, the correct option is A, molecular polarity.
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You reacted 5.00 mL of 0.250 M copper (II) chloride with 8.00 mL of 0.100 M sodium phosphate. If the percent yield of your product is 87.5%, what is the amount (grams) of copper (II) phosphate trihydrate that precipitated. **Make sure your answer has the correct number of significant figures. Do NOT include units.**
The amount, in grams, of copper (II) phosphate that precipitated would be 0.057 grams.
Stoichiometric problemThe reaction between copper (II) chloride and sodium phosphate is represented by the following equation:
[tex]3CuCl_2 + 2Na_3PO_4 --- > Cu_3(PO_4)_2 + 6NaCl[/tex]
Mole of 5.00 mL of 0.250 M copper (II) chloride:
5/1000 x 0.250 = 0.00125 moles
Mole of 8.00 mL of 0.100 M sodium phosphate:
8/1000 x 0.1 = 0.0008 moles
Mole ratio of copper (II) chloride and sodium phosphate = 3:2
Thus, sodium phosphate is slightly limiting and will determine how much of the products are formed from the reaction.
Mole ratio of sodium phosphate and copper (II) phosphate = 2:1
Equivalent mole of copper (II) phosphate formed = 0.0008/2
= 0.0004 moles
Mass of 0.0004 moles sodium phosphate = 0.0004 x 163.94
= 0.0656 grams
But the percent yield is 87.5%.
87.5% of 0.0656 = 0.057 grams
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a sample of gold required 2.1200j of heat to melt it from room temperature, 22.0 degrees celsius to its melting point, 1064.4 degrees celsius. How many pounds of gold were in the sample?
Mass of Gold = 267.165 × 0.01552494829
⇒ 4.1477228099
The amount of heat(q) required to raise m grams of a substance-specific C from T1 to T2 is given by
q=m C (T2-T1) ........1
Given : q= 2.1200 J
the initial temperature of gold, T1 = 22.0Celcius
the final temperature of gold, T2 = 1064.4Celcius
specific heat of gold = 0.131
putting values in eq 1:
⇒ 2.1200 = m × 0.131 × (1064.4-22)
⇒ 2.1200 = m × 0.131 × 1042.4
⇒ 2.1200 / 136.5544
⇒ 0.01552494829
Since 1g= 0.01552494829 Pounds
Mass of Gold = 267.165 × 0.01552494829
⇒ 4.1477228099
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Part B
Follow these steps to complete the table:
1. Reuse the same test tubes from part A, labeled Fe²+ and Fe³+. Be sure they're clean.
2. Add 4 milliliters of iron(II) sulfate to the test tube labeled Fe²+,
3. Add 4 milliliters of iron(III) nitrate to the test tube labeled Fe³+.
4. Add 4 milliliters of potassium iodide to each test tube.
5. Add 1 milliliter of the prepared starch solution to each test-tube.
6. Record your observations, noting any evidence of a chemical reaction. If there is no evidence of a
reaction, write "no reaction."
BIUX² X₂ 10pt
Substances Mixed
iron(II) sulfate, potassium iodide, and starch
iron(III) nitrate, potassium iodide, and starch
Characters used: 191/15000
AVA
Iron Ion Present
iron(II) (Fe²+)
iron(III) (Fe³+)
V
Description of the Reaction
iron(II) sulfate, potassium iodide, and starch the solution will turn from yellow to blue.
iron(III) nitrate, potassium iodide, and starch will turn from yellow to blue.
Iron sulphate react with potassium iodide and starch the solution which is initially yellow in colour will turn to Blue this is because the fe3+ ion will iron will get reduced to fe2+. This takes place in an acidic solution. Here the iron will be reduced and the iodine will form a complex with starch.
Iron Nitrate react with potassium iodide and starch the solution which is initially yellow in colour will turn to Blue this is because the fe3+ ion will iron will get reduced to fe2+. This takes place in an acidic solution. Here the iron will be reduced and the iodine will form a complex with starch.
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The solution will change from yellow to blue in the presence of FeSO4, KI, and starch.
Starch and Fe(NO3)3 will change from yellow to blue.
Starch and KI react with FeSO4 to produce an initially yellow solution that becomes blue. this is due to the fact that in an acidic solution, the iron ion fe3+ is reduced to fe2+. Here, the iron will be reduced and the iodine will combine with the starch to produce a complex because of the reduction of the iron ion, the fe3+ ion, in the Fe(NO3)3 reaction with KI and starch, the solution's original yellow color changes to blue. This occurs in an acidic liquid. Here, the iron will be reduced and the iodine will combine with the starch to produce a complex.To know more about Starch visit : https://brainly.com/question/11444445
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How many cars are in 2.5 moles of cars?
The number of tires contained by 2.5 moles of cars is 10 tires.
What is number of moles?The number of moles of a substance equals the ratio of its given mass in a chemical reaction to the mass of one mole of that substance.
The number of tires contained by 2.5 moles of cars is calculated as follows;
1 moles of a car contains 4 tires
2.5 moles of cars will contain -------?
Substitute the given parameters and solve for the number of tires contained in 2.5 moles of cars.
= 2.5 moles x 4 tires/1 mole
= 10 tires
Thus, the number of tires contained by 2.5 moles of cars is 10 tires.
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(34) SEP Construct an Explanation The flame test solutions all contain
ionic compounds with the same anion-the chloride anion-and they
all produce flames with different colors. Why does the chloride anion
not contribute to the flame test colors?
Anions can affect the results of combustion tests. For example, copper compounds with non-halides produce green flames, while copper halides produce blue-green flames. To become a neutral chlorine atom again, it must lose an extra electron.
Metal chlorides evaporate under a flame giving a lighter color Color can be used to identify metal ions. Chlorine atoms do not emit energy in the visible light range. When metal ions and metal chlorides are placed under a flame, the electrons gain energy. Sodium chloride gives the flame a bright yellow-orange color.
Most of his lab manuals state that metallic cations in ionic compounds are usually responsible for the color in combustion tests, and students corroborate this fact. This exercise also demonstrates the importance of controlling variables and making meaningful comparisons.
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Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients
C(s) + H₂(g) → C₂H. (g)
6
A block has a mass of 4.495 and a volume of 147.4 calculate the density
Answer:0.0303495251
Explanation:
I know the answer looks weird.
If the answer is wrong then the formula for density is mass divided by volume.
Why do you think the mass number
includes only the numbers of protons and neutrons?
Protons and neutrons make up the majority of an atom's mass because electrons have almost negligible mass. Consequently, an atom's mass in atomic mass units is determined by the sum of its protons and neutrons.
How do the quantity of protons and neutrons affect atomic mass?An element's mass number is determined by the sum of its proton and neutron counts: Protons and neutrons together make up mass. Simply deduct the number of protons, or atomic number, from the mass number to get how many neutrons each atom has.
This becomes significant when there is a mass number. It enables us to distinguish between elements known as isotopes that have differing numbers of neutrons.
Although protons and neutrons are similar in size, they are both significantly heavier than electrons (approximately 2,000 times as massive as an electron). A proton's positive charge is equivalent to an electron's negative charge in strength.
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Planet. HELP QUICK
A
B
C
D
Intro
Distance from Sun (km)
778,600,000
4,495,100,000
1,433,500,000
2,872,500,000
What is the identity of the planets?
A:
B:
C: Saturn
D:
Uranus
Neptune
Jupiter
Done
The identity of planet is:
A) Jupiter : 778,600,000 km
B) Neptune : 4,495100,00 km
C) Saturn : 1433500000 km
D) Uranus : 2872500000 km
The distance from the sun of planets is given in kilometers.
A) 778,600,000 km : Jupiter
Jupiter is fifth planet from the sun. Jupiter is the largest in the solar system. it is famous for iconic red spot.
B) 4,495,100,000 km : Neptune
Neptune is eight planet from the sun. Neptune is the farthest planet in solar system.
C) 1,433,500,000 km : Saturn
Saturn is sixth planet from the sun. Saturn is second largest planet in solar system.
D) 2,872,500,000 km : Uranus
Uranus is seventh planet from the sun. For Uranus , equator is nearly at right angle to its orbit.
Thus,
A) Jupiter : 778,600,000 km
B) Neptune : 4,495100,00 km
C) Saturn : 1433500000 km
D) Uranus : 2872500000 km
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which of the following mixtures can be separated by sieving
The mixture of husk and stones can be separated by sieving.
What is sieving?Sieving is the process or method by which small particles are get separated from bigger particles. In the process of sieving sieve is used to differentiate between the smaller particles from the bigger particles. Husk and stones can be separated by the method of sieving.
Mixture is a combination of more than two substances combined together but their chemical properties remain separate. Husk and stones can be separated by the method of sieving.The components present in mixture can be separated easily by separation methods.
Therefore, Husk and stones can be separated by the method of sieving.Thus, The mixture of husk and stones can be separated by sieving.
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When graphic scores first evolved, what were they often used in combination with?
A. Traditional music notation
B. Numerical systems
C. Bar charts
Answer: its A
Explanation: Graphic notation (or graphic score) is the representation of music through the use of visual symbols outside the realm of traditional music notation. Graphic notation became popular in the 1950s and can be used either in combination with or instead of traditional music notation.
1. A 105.5mg sample of a white substance, suspected of being cocaine (C17H21NO4), forms 279.3mg of CO2 and 66.46mg of water on combustion. Chemical analysis shows that the compound contains 4.68% N by mass. Would you conclude that the white solid is cocaine?
If,105.5mg sample of a white substance, suspected of being cocaine (C17H21NO4), forms 279.3mg of CO2 and 66.46mg of water on combustion, then we can conclude that the white solid is cocaine.
Types of Cocaine:1. Pure Cocaine :
Pure cocaine is type of crystalline powder which is derived from the leaves of the coca plant. Pure cocaine are very rare in the United States of America.The product is often passes with the help of the supply chain.
2.Crack Cocaine :
Crack cocaine are small in size and is a kind of rocky material.Depending upon it's purity they varies in color.Crack cocaine is generally used for smoking.it is also known as freebase cocaine.3. Synthetic Cocaine :
Synthetic forms of cocaine (also called as fake cocaine) are generally used as medicine in local areas.This product is looks like powdered material or crack cocaine.4.Black Cocaine :
Black cocaine is a chemically an another version of cocaine that is used to evade detection in body. It is usually a combination of cocaine, charcoal and some other chemicals.Black cocaine are not commonly used. What is Combustion reaction?A combustion reaction is a type of chemical reaction in which generally a fuel undergoes an oxidation by the reaction with the help of an oxidizing agent, which ,results in release of energy.
it is generally an exothermic process.It reacts between oxidents and fuels.Solid fuels such as coal and wood are generally undergoes an endothermal pyrolysis.It results in the creation of fuels.The combustion of that types of gaseous fuels is generally used to provide the heat required which is required to accelerate more combustion.Thus from the above conclusion we can say that, If,105.5mg sample of a white substance, suspected of being cocaine (C17H21NO4), forms 279.3mg of CO2 and 66.46mg of water on combustion, then we can conclude that the white solid is cocaine.
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