FREE CHEMISTRY AND STUDY GAMES ABOUT CHAPTER 10

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FREE CHEMISTRY AND STUDY GAMES ABOUT CHAPTER 10

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -18 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: The representative particle for most elements is what?

Answer:

the atom

Question 2: Molar volume is used to convert between what?

Answer:

between the number of moles of gas and the volume of gas at STP.

Question 3: How can you convert amoung the count, mass and volume of something?

Answer:

by knowing how the count, mass and volume relate to a common unit.Question 4: What is the first step to find the number of atoms in a given number of moles of a compound?

Answer:

first determine the sumber of representative particles.

Question 5: What is percent composition?

Answer:

the percent by mass of each element in the compound.

Question 6: What does standard temperature and pressure mean?

Answer:

a temperature of degree 0 C and the pressure of 101.3 k Pa, or 1 atmosphere.Question 7: How do you determine the molar mass of an element and of a compound?

Answer:

1)the atomic mass of an element is the mass of a mole of the element 2) find the number of grams of each element in one mole of the compound. Then add the masses of the elements in the compound.

Question 8: What is a mole?

Answer:

a unit that is a specific number of particles.

Question 9: What is the mole number or Avogardo's number?

Answer:

6.02 x10^23

Question 10: The quantitly 22.4 is called what?

Answer:

molar volume.Question 11: How do you convert the number of moles in a compound to the number of representative particles?

Answer:

multiply the number of moles by 6.02 x 10^23 representative particles/one mole.

Question 12: Standard temperature and pressure stands for what?

Answer:

STP

Question 13: How big is a mole? (the measurment)

Answer:

HUGE

Question 14: What was Avogadro's hypothesis?

Answer:

that equal volume of gasses at the same temperature and pressure contain equal numbers of particles.

Question 15: The term representative particle refers to what?

Answer:

the species present in a substance (usually an atoms, molecules or formula units.)

Question 16: What does the empirical formula of a compound give?

Answer:

the lowest whole-number ratio of the atms or moles of the elementin a compound.Question 17: What are the steps in finding the percent by mass of an element in a compound?

Answer:

find the number of grams in an element, divide by the mass in grams of the compound, then multiply it by 100%.

Question 18: What does the mole allow chemists to do?

Answer:

count the number of representative particles in a substance.