If 105.5mg sample of a white substance, suspected of being
cocaine (C17H21NO4), forms 2.79.3mg of CO2 and 66.46mg of
water on combustion, then the white solid is cocaine.
What is Combustion reaction?A Combustion reaction is defined as the chemical reaction which is generally a fuel that undergoes an oxidation by the reaction by the help of an oxidizing agent, which further results in the emission of energy.
It is mainly an exothermic process. It reaction between fuels and oxidents. Fuels such as wood and coal undergoes an endothermal pyrolysis. This result in the creation of fuel. Types of cocaine:Pure CocaineCrack CocaineSynthetic CocaineBlack CocaineThus, we concluded that the white solid is cocaine if If 105.5mg sample of a white substance, suspected of being
cocaine (C17H21NO4), forms 2.79.3mg of CO2 and 66.46mg of water on combustion.
learn more about Cocaine:
https://brainly.com/question/944545
#SPJ9
what is the mass of one sheet of paper in (g) of 500 sheets is 5 pounds? show in conversion factor
Answer:
1/5
Explanation:
1/5×500
=so guess this is the one
Name the following aromatic hydrocarbon: A. chlorobenzene C. chlorohexane -Cl B. chlorohexyne D. benzene chloride
Answer:
A
Explanation:
benzene is an automatic chemical, so a answer A chlorobenzene, had to be the the aromatic hydrocarbon
You are boiling vegetables on the stove and notice the lid of the pot moving up and down Why?
Answer:
cause the pot is probably boiling over making a ton of bubbles and foam
Explanation:
Write the symbol for the ion depicted here
Answer:
can you repost with picture? I can help.
what is the total length of two pieces of tubing which measure 4.5 cm and 3.222 cm? express the answer to the correct number of significant figures
The total length of the two pieces of tubing with correct number of significant figures is 7.7 cm.
There are certain rules regarding significant figures.
The rule about the addition of two quantities is that when two quantities are added then the number of digits after decimal in the sum of the two quantities should be equal to the least number of decimal places present in the given quantities.
In the above case, the two numbers are 4.5 cm and 3.222 cm and they contain 1 and 3 digits after decimal. So, the final answer should have only 1 decimal place.
Adding 4.5 cm + 3.222 cm = 7.722 cm
The answer should contain only 1 digit after decimal so the answer is rounded off to 7.7 cm.
Thus, the total length of the two pieces of tubing with correct number of significant figures is 7.7 cm.
To know more about "significant figures", refer to the following link:
https://brainly.com/question/14804345?referrer=searchResults
#SPJ1
Alien data statements
a student investigates the density of an aluminum cola can by submerging it in a measuring cylinder of water. When completely submerged, a full can of unopened cola displaces 337 ml of water. The student then empties the can, she finds that it holds 332 ml of cola and that the mass of the empty can is 13.5g when it's empty. Calculate the density of the aluminum used to make the can.
(I did 337-332= 5ml 13.5g/5ml= 2.7 g/cm^3 . I think I got it wrong)
The density of the can is 0.041 g/mL.
What is the density?The term density is the ratio of the mass to the volume of an object. We know that the volume is an intrinsic property of the substance. The volume does not change thus, it can be used to identify a substance.
Now we have that the volume of the liquid that the can could hold is 332 ml. This is the real volume of the aluminum can. The mass of the can is found to be 13.5g.
Density = mass/volume = 13.5g / 332 ml = 0.041 g/mL
Learn more about density:https://brainly.com/question/15164682
#SPJ1
Guide Questions. 1.) What is the color of the Freshly cut apple/eggplant/potato in glass A and glass B? 2.) What is the color of the apple/ eggplant/potato After 48 hours in glass A and glass B? 3) What is the effect of the exposing the slice of the material in oxygen in glass A and glass B after 48 hours? 4) What is the effect of puting an Vitamin C (as antioxidant that prevents Further oxidantion of apple /eggplant in Glass B?
Freshly-cut eggplant, while uncovered to the air, quickly oxidizes and turns black, kind of the manner an apple goes brown after it is reduced and uncovered to air. the Apple inexperienced eggplant's outer skin is smooth, shiny, and maybe yellow or pale inexperienced.
Leaving slices of apples exposed to the air results in the apple turning an acquainted brown shade. This process, referred to as enzymatic browning, is due to the reaction of positive enzymes with phenolic compounds, both gift inside the apple, that occurs when they may be uncovered to oxygen inside the air.
The eggplant turns brown whilst uncovered to air because a reaction is occurring whilst a cut piece of fruit is exposed to oxygen. this is called enzymatic browning. The call enzymatic browning comes from the truth that an enzyme positioned inside the fruit reacts with oxygen from the air to turn the fruit brown.
Learn more about eggplant here:-https://brainly.com/question/24499674
#SPJ9
Which of the following is the
correct way to express the
number below in standard form?
3.4 x 10^5
A. 0.000034
B. 0.00034
C. 3400000
D. 340000
Answer:
D
Explanation:
Cite as organelas citoplasmáticas de a função de duas.
R:?
Fred Frantic, a busy student, needed to get back to his job, and was in a hurry. Tell what effect each of the following procedural errors would have on both the percent copper and the percent chlorine that he would determine. In other words, would the percent of each element increase or decrease? Consider and briefly explain each error individually.
b. Fred removed the aluminum wire from the solution while it was still blue. He went ahead and de canted the solution, and isolated the solid remaining.
It would probably be around 20 because of the aluminy
When an electron moved from ground state to the excited state it
When an electron moved from the ground state to the excited state it gained energy and passed to a high level of energy.
What is an electron shell?An electron shell is a layer of the electrons that contains a given amount of energy and may pass to higher levels by excitation which also read to change the orbital from the ground state to the excited state.
In conclusion, when an electron moved from the ground state to the excited state it gained energy and passed to a high level of energy.
Learn more about electron energy states here:
https://brainly.com/question/81112
#SPJ1
how is the stellar spectrum of Betelgeuse different than the spectra of the other stars in the constellation Orion?
Due to the temperature of the stars the stellar spectrum of Betelgeuse different than the spectra of the other stars in the constellation Orion.
What are constellation Orion?Constellation Orion is defined as a prominent constellation of the orion which has been located on the equator of celestial and it can be visible throughout the whole world. It is the most identified constellations in the sky at night.
Constellation Orion is the most identified constellations in the sky at night. Constellation Orion is defined as a prominent constellation of the orion which has been located on the equator of celestial and it can be visible throughout the whole world.
Therefore, Due to the temperature of the stars the stellar spectrum of Betelgeuse different than the spectra of the other stars in the constellation Orion.
Learn more about Constellation Orion here:
https://brainly.com/question/13387637
#SPJ1
Be sure to answer all parts.
Which monatomic ions would you expect rubidium (Z = 37) and phosphorus (Z = 15) to form?
rubidium (Z = 37)
phosphorus (Z = 15)
Answer:
Explanation:
z=36
f=88
c=66
An exothermic reaction is a
reaction that produces heat.
Which would describe this
type of reaction?
A. A physical change
B. A chemical change
C. A solution change
An exothermic reaction is a reaction that produces heat this type of reaction is a chemical change.
The correct option is B.
What is an Exothermic Reaction?Exothermic reactions are chemical in nature and are distinguished by the release of energy in the form of heat or light. One instance of this kind of reaction, when the release is in the form of both heat and light, is lighting a match. An exothermic reaction causes the release of heat, which raises the temperature of the surrounding area. An exothermic process process that absorbs heat cools the environment.
What four exothermic reactions are examples?Polymerizations, combustion, thermite reactions, mixing potent acids and bases As an everyday example, hand warmers exploit the exothermic reaction brought on by iron oxidation.
To know more about exothermic reaction visit:
https://brainly.com/question/10373907
#SPJ9
Which of the following statements is TRUE about graphic scores?
A. Graphic scores can only be written on manuscript paper
B. The performer can interpret the score however he/she wishes
C. Graphic scores cannot show dynamic changes
D. The composer is not allowed to make suggestions regarding the performance
The performer can interpret the score however he/she wishes in a graphic score. The correct option is B.
What is graphic score?A graphic score is simply another method of notating music or sounds on a page, in addition to the more traditional 5-line stave.
They created graphic scores or graphic notation, a new way of visualizing music. Graphic scores are frequently distinct from traditional musical scores.
Graphic scores, as opposed to lines and dots on a musical stave, can use a variety of images and symbols to instruct the performer on what to play.
In a graphic score, the performer can interpret the score however he or she sees fit.
Thus, the correct option is B.
For more details regarding graphic score, visit:
https://brainly.com/question/28814747
#SPJ1
Where should Franklin place this property in his table?
Answer:
to the left of his table :)
8. How are organs similar to cities?
PLEASE HELP
What is the frequency of a photon whose energy (E) is 7.48 x 10 -6 J?
Answer:
1.128*10¹⁹ [GHz].
Explanation:
1) the initial formula is
E=hν, where ν - required frequency,
2) according to the formula above
[tex]\nu=\frac{E}{h};\\ \nu=\frac{748*10^{-8}}{663*10^{-36}}=1.128*10^{28}[Hz][/tex]
Which of the following characteristics best describe the properties of liquids? Select all that apply.
A. Not easily compressed
B. Easily compressed into a smaller volume
C. Takes the shape of its container
D. Has indefinite shape and fixed volume
E. Has definite shape and volume
F. Particles are packed tightly together, often in an orderly arrangement
G. Expands to fill any volume
The characteristics among the choices given which best describe the properties of liquids are
Easily compressed into a smaller volumeTakes the shape of its containerHas indefinite shape and fixed volume.The correct answer choices are options B, C and D.
Of course, liquid do not have a fixed shape but they a fixed volume. The particles of liquids are not tightly packed together as in solids but have some spaces between their particles.
What are characteristics of liquids?Liquids are characteristized by the following properties such as:
Fixed volumeindefinite shapeThey are easily compressedSo therefore, the characteristics among the choices given which best describe the properties of liquids are
Easily compressed into a smaller volumeTakes the shape of its containerHas indefinite shape and fixed volumeLearn more about liquids:
https://brainly.com/question/28244871
#SPJ1
Conductivity
If it conducts ____ or ____ it allows heat and electricity to ____ through ____
Based on the concept of conductivity, if it conducts heat or electricity, it allows heat and electricity to pass through it.
What is conductivity?Conductivity is the ability of certain materials to allow heat ad electricity to flow or pass through them easily.
Conductivity is the opposite or resistivity or insulation which is the property of material that makes them restrict the movement of heat or electricity through them.
Materials that allow heat and electricity to flow through them easily are called conductors.
Conductors are mostly metallic objects because metals allow heat and electricity to flow through them easily.
Other conductors are the electrolytes which are substances which when in molten form, allow electricity to easily pass through them.
In conclusion, conductivity denotes the ability of a material to allow heat and electricity to pass through it.
Learn more about conductivity at: https://brainly.com/question/13322537
#SPJ1
A cube of solid aluminum has a volume of 7.91×103 cm3 and a density of 2.699g/cm3. However, the cube was dropped and you were left with a chunk with a volume of 1.81×103 cm3. How many atoms of aluminum did you lose?
The number of aluminum atoms you lost, given the data from the question is 3.67×10²⁶ atoms
How to determine the number of aluminum atomsWe'll begin by obtaining the mass of the aluminum atoms lost. This is illustrated below:
Original volume = 7.91×10³ cm³ Density of aluminum = 2.699 g/cm³Volume remaining = 1.81×10³ cm³Volume lost = 7.91×10³ - 1.81×10³ = 6.1×10³ cm³Mass of aluminum lost =?Density = mass / volume
Cross multiply
Mass = Density × Volume
Mass of aluminum lost = 2.699 × 6.1×10³
Mass of aluminum lost = 16463.9 g
Finally, we shall determin the number of atoms of aluminum lost. This can be obtained as follow:
From Avogadro's hypothesis
1 mole of aluminum = 6.02×10²³ atoms
But,
1 mole of aluminum = 27 g
Thus,
27 g of aluminum = 6.02×10²³ atoms
Therefore,
16463.9 g of aluminum = (16463.9 g × 6.02×10²³ atoms) / 27 g
16463.9 g of aluminum = 3.67×10²⁶ atoms
Thus, 3.67×10²⁶ atoms of aluminum were lost
Learn more about density and number of atoms:
https://brainly.com/question/952755
https://brainly.com/question/28611842
#SPJ1
which of the following is not a unit that could be used for density
A. g/cm3
B.g/mL
C.mL/g
D.kg/m3
Answer:
Explanation:
c
A piece of chalk (mainly calcium carbonate) is placed in 250. mL of 0.468 M HCI.
All the CaCO3 reacts, releasing carbon dioxide gas and leaving 250. mL of a clear solution.
20.00 mL of the solution is pipetted into another flask.
29.8 mL of 0.0576 M NaOH is required to titrate the HCI remaining in this 20.00-mL portion.
What was the original mass of CaCO3 in the piece of chalk
To calculate mass of CaCO3, individual mass of the elements is taken (Ca= 40.1g/mol, C= 12.0g/mol, O=16.0g/mol). So, 40.1+12.0+48.0 = 100.1gmol. Therefore, 100.1 g/mol is the answer.
What is calcium carbonate?Calcium carbonate is a source of calcium in the supplemental form. It is also present as a part of exoskeleton in certain animals. It is also found as a component in eggshells.
It is obtained from carbon resources. Calcium carbonate is industrially used in production of limescale and in plaster of paris for roofing. It is often used to treat hyperacidity and given as an antacid.
Thus, calcium carbonate has wide range of chemical applications.
Learn more about calcium carbonate, here:
https://brainly.com/question/13565765
#SPJ1
What mass in grams of nitrogen would be present in a 10.0 g sample of N2O5?
1 mole of any substance contains 6.022×[tex]10^{23}[/tex] particles
Therefore,
0.18516 mol of nitrogen contains = (0.18516 mol) × (6.022 x [tex]10^{23}[/tex]) = 1.115×[tex]10^{23}[/tex] nitrogen atoms = 1.1×[tex]10^{23}[/tex] atoms of N.
Hence, in 10.0g of [tex]N_{2} O_{5}[/tex], 1.1×[tex]10^{23}[/tex] atoms of nitrogen are present.
The mass of one atom of nitrogen is 2.32×[tex]10^{-23}[/tex] grams.
Therefore, mass of 1.1×[tex]10^{-23}[/tex] atoms of nitrogen will be 1.1×[tex]10^{-23}[/tex] x 2.32×[tex]10^{-23}[/tex] grams = 2.55 x [tex]10^{-46}[/tex] grams.
Dinitrogen pentoxide, sometimes referred to as nitrogen pentoxide or nitric anhydride, is the chemical compound having the formula N2O5. It belongs to the family of chemicals known as binary nitrogen oxides, which simply consists of nitrogen and oxygen.It is practical to express the quantity of a substance using the mole idea. The numerical magnitude and the units in which the magnitude is expressed are the two components that make up any measurement. The magnitude is "2" and the unit is "kilogram," for instance, when a ball's mass is measured to be 2 kilograms.Hence the correct answer is that 10.0g of [tex]N_{2} O_{5}[/tex] contains 2.55 x [tex]10^{-46}[/tex] grams of Nitrogen.
Learn more about the mole concept here:
brainly.com/question/12805690
#SPJ9
How many moles of ammonia would be required to react exactly with 0.764 moles of copper(II) oxide in the following chemical reaction?
2 NH₃(g) + 3 CuO(s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)
0.313 moles NH3 moles of ammonia would be required to react exactly with 0.764 moles of copper(II) oxide in the following chemical reaction.
What is a balanced equation?
A balanced equation is one for a chemical reaction where the overall charge and the number of atoms for each component are the same for both reactants and the products. In those other words, the weight and charge of both ends of the reaction are equal.
2 NH₃(g) + 3 CuO(s) → 3 Cu(s) + N₂(g) + 3 H₂O(g) is a balanced equation.
The coefficients of the compounds give the mole ratios,
So 2 moles of ammonia (NH3) will react with 3 moles of copper(II) oxide, (CuO).
We use simple proportion or use dimensional analysis
By proportion: 2 mol NH3/3 mol CuO = x mol NH3/0.470 mol CuO and x = 0.313 moles NH3
By dimensional analysis: 0.470 mol CuO x 2 mol NH3/3 mol CuO = 0.313 moles NH3
Therefore, 0.313 moles of NH3 of ammonia would be required to react exactly with 0.764 moles of copper(II) oxide in the following chemical reaction.
Read more about balanced equations, here
https://brainly.com/question/7181548
#SPJ1
Which of the Newman structures below represents this conformation of 3-chloro-2-methylpentane, as viewed along the C2-C3 bond?
The formula for 3-chloro-2-methylpentane is C6H13Cl if that helps). I have a picture of the four possible answers attached below.
The Newman structures above which represents the conformation of 3-chloro-2-methylpentane, as viewed along the C2-C3 bond is the one where the branch substituent chloro is found at carbon 3 and the branch substituent methyl is found at carbon 2.
The correct answer choice in the picture above is option b.
In this structure, there are two different branch substituents; which are ethyl and chloro. The parent substituent is known has pentane, having 5 carbon atoms the the Newman structures above
What are organic compounds?These are compounds containing carbon and hydrogen. The study of organic compounds in chemistry is called organic chemistry.
So therefore, the Newman structures above which represents the conformation of 3-chloro-2-methylpentane, as viewed along the C2-C3 bond is the one where the branch substituent chloro is found at carbon 3 and the branch substituent methyl is found at carbon 2.
Learn more about organic compounds:
https://brainly.com/question/9243719
#SPJ1
If the mass of a crucible is 12.1 g and the mass of a crucible containing CuSO4 is 23.1 g, then what is the mass of the CuSO4?
If the mass of a crucible is 12.1 g and the mass of a crucible containing CuSO4 is 23.1 g, then the mass of the CuSO4 is 11 gram.
A basic characteristic of all matter, inertia can be quantified as mass. It essentially refers to a body of matter's resistance to changing its speed or location in response to the application of a force. we know the mass of crucible and mass of crucible containing copper sulphate so to find out the mass of copper sulphate we will subtract mass of crucible from mass of crucible containing copper sulphate.Given,
mass of crucible is 12g
mass of crucible with copper sulphate is 23.1g
so the mass of CuSO4 = mass of crucible with copper sulphate - mass of crucible
= 23.1 g - 12.1g = 11 g
Therefore mass of CuSO4 is 11g
Learn more about Inertia here:
https://brainly.com/question/1140505
#SPJ9
A(n) ___ is equal to the mass of a proton.
electron
nucleus
neutron
electron cloud
Answer:
neutron
Explanation:
A proton is one of three main particles that make up the atom. Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.
Why are nutrient molecules important?
Nutrient molecules are important because the body breaks down nutrient molecules into absorbable molecules that can produce energy in the body for carrying out daily tasks.
In order to sustain life and promote growth and health, our bodies need nutrients that are chemical components that can be found in food. Nutrients must come from our diet because the human body is unable to produce them.Three primary roles that nutrients play in the body include: supplying energy, supporting bodily structure, and controlling chemical reactions.Our body needs a variety of nutrients, including carbohydrates, protein, fat, minerals, vitamins, roughage, etc.Macronutrients are nutrients that must be present in large quantities. The three types of macronutrients are proteins, lipids, and carbohydrates. These might be metabolically converted into cellular energy.The body needs micronutrients in smaller levels, yet they are still necessary for performing basic activities. All of the necessary minerals and vitamins are considered micronutrients.Therefore, nutrient molecules are important for overall growth of our body.
Learn more about Vitamins here:
https://brainly.com/question/1913673
#SPJ9