Which of the following are some properties of small hydrocarbons compared with larger hydrocarbons?

A) Higher boiling point, lower volatility, lower viscosity, lower flammability

B) Lower boiling point, higher volatility, lower viscosity, higher flammability

C) Lower boiling point, lower volatility, lower viscosity, lower flammability

D) Higher boiling point, higher volatility, higher viscosity, higher flammability

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

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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Yes. The melting point of a substance can be used as a criterion of its purity.

The 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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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.

The period of the pendulum is defined as  time it takes the pendulum to make one full back-and-forth swing

The pendulum is a device that could be used to demonstrate oscillatory motion. We know that the pendulum has a long string that is fastened to a support. The bulb is displaced at a small angle and the period is the time that is taken to complete the cycle.

The kind of motion that is undergone by a pendulum is what we define as the oscillatory motion. It is a regular repeating motion and the acceleration is directed always towards the center of the motion.

We can tell that the pendulum swings from one side to the other and we could use the stop clock to measure the movement of the pendulum. Thus it follows that the period of the pendulum is defined as  time it takes the pendulum to make one full back-and-forth swing.

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The characteristic property of the substances in the solutions does thin-layer chromatography utilize is molecular polarity. The correct option is A.

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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The amount, in grams, of copper (II) phosphate that precipitated would be 0.057 grams.

The 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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Answer:

sugar is hygroscopic

Explanation:

sugar is hygroscopic

The density of the baby oil, ρ = 0.833 g/ml.

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

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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The middle element in a specific group of similar elements act as an intermediate between the other two because it is close to the average of the other two elements and is denoted as option C.

These are the substances which aren't unable to be broken down by a chemical reaction and comprises of subatomic particles such as electron, proton etc.

The middle element in a specific group of similar elements act as an intermediate between the other two because it is close to the average of the other two elements when arranging the elements in order of their atomic masses.

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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.

1. Pure Cocaine :

The product is often passes with the help of the supply chain.

2.Crack Cocaine :

3. Synthetic Cocaine :

4.Black Cocaine :

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.  

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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Answer: Uranus and neptune

Explanation:

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.

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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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-

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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The number of tires contained by 2.5 moles of cars is 10 tires.

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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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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The complementary strand is: CCA - AAA - ACC - CAC - TGG - TTT

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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Answer:

Simple staining provides the contrast between the bacteria and the surroundings.

Explanation:

Over staining the bacterial smear may cause the cell wall disruption or totally destroy the cell wall which results in the loss of true morphological characteristics of the bacterial cell

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.

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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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.

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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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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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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To determine the density of a living body, divide the body mass by the volume of the body.

"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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Answer: $582.47

Explanation:

Convert $4.64 per lb to $ per gallon. That would equal around $37.10. Multiply that by 15.70 gallons of strawberries and you'll get $587.47.

15.70 gallons of strawberries would cost approximately $365.40.

To determine the cost of 15.70 gallons of strawberries, we need to convert the volume from gallons to pounds and then multiply by the cost per pound.

First, we need to know the conversion factor between gallons and pounds for strawberries. This conversion factor depends on the density or specific gravity of strawberries, which can vary. Without this information, it is not possible to accurately convert gallons to pounds.

If we assume an average conversion factor of 1 gallon of strawberries weighing approximately 5 pounds, we can estimate the cost. However, please note that this is an approximation and the actual weight of strawberries per gallon may vary.

15.70 gallons * 5 pounds/gallon * $4.64/pound = $365.40

Therefore, based on the approximation, 15.70 gallons of strawberries would cost approximately $365.40.

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[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 ~

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.

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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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.

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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The volume of the alloy of gold and silver having density of 13.1 g/cm³ and mass 4.80 g is 0.367 cm³.

We have an alloy of gold and silver.

We have to calculate the volume of a 4.80 g sample of the alloy.

The ratio of mass to density is equal to volume of a substance. Mathematically -

M/ρ = V

ρ - density of substance.

M - mass of substance

V - volume of substance

According to the question -

The ratio of mass to density is -

V = M / ρ

Substitute the values -

V = 4.80 / 13.1 = 0.367 cm³.

Hence, the volume of the alloy of gold and silver is 0.367 cm³.

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