Assessment
Directions: Choose the correct answer from the choices below.
1. The mass of an atom expressed relative to the mass of?
A. Carbon-6 C. Carbon-12
B. Carbon-10 D. Carbon
2. It is defined as the number of atoms of that element equal to 12.0 grams of an isotope of Carbon.
A. Molar Mass C. Particles
B. Stoichiometry D. Mole
3. The first step in every Stoichiometry Problems is to?
A. Balance the equation C. Solve the mass of the element/compound
B. Determine the Limiting Reagent D. Determine the Excess Reagent
4. Stomach acid is made up of hydrochloric acid (HCl). How many percent by mass does hydrogen take up in the compound?
A. 27% C. 1.6%
B. 2.8% D. 2.0%
5. A piece of marble contains 8.74 x 1025 formula units of calcium carbonate (CaCO3). How many moles does it contain? …show more content…
2 mol C. 2.73 mol
B. 1.45 mol D. 1.65 mol
6. Given the following equation: 2 NaClO3 ---> 2 NaCl + 3 O. 12.00 moles of NaClO3 will produce how many grams of O2?
A. 576.8 g C. 590.0g
B. 576.0g D. 546.7g
7. What is the value of the Avogadro’s Number?
A. 6.02 x 1023 C. 6.22 x 1023
B. 6.02 x 1024 D. 6.022 x 1022
8. You have 250 g of table sugar, (C12H22O11). How many molecules does it have?
A. 3.9 x 1023 molecules C. 4.4x 1023 molecules
B. 4.9 x 1023 molecules D. None of the choices presented
9. Choose that doesn’t belong to the group
A. Moles C. Mass
B. Atoms D. Particles
7
10.Which of the stoichiometry problems involves the longest multi-step conversion?
A. Mole-mole C. Mass-particle
B. Mass-mass D.
Directions: Choose the correct answer from the choices below.
1. The mass of an atom expressed relative to the mass of?
A. Carbon-6 C. Carbon-12
B. Carbon-10 D. Carbon
2. It is defined as the number of atoms of that element equal to 12.0 grams of an isotope of Carbon.
A. Molar Mass C. Particles
B. Stoichiometry D. Mole
3. The first step in every Stoichiometry Problems is to?
A. Balance the equation C. Solve the mass of the element/compound
B. Determine the Limiting Reagent D. Determine the Excess Reagent
4. Stomach acid is made up of hydrochloric acid (HCl). How many percent by mass does hydrogen take up in the compound?
A. 27% C. 1.6%
B. 2.8% D. 2.0%
5. A piece of marble contains 8.74 x 1025 formula units of calcium carbonate (CaCO3). How many moles does it contain? …show more content…
2 mol C. 2.73 mol
B. 1.45 mol D. 1.65 mol
6. Given the following equation: 2 NaClO3 ---> 2 NaCl + 3 O. 12.00 moles of NaClO3 will produce how many grams of O2?
A. 576.8 g C. 590.0g
B. 576.0g D. 546.7g
7. What is the value of the Avogadro’s Number?
A. 6.02 x 1023 C. 6.22 x 1023
B. 6.02 x 1024 D. 6.022 x 1022
8. You have 250 g of table sugar, (C12H22O11). How many molecules does it have?
A. 3.9 x 1023 molecules C. 4.4x 1023 molecules
B. 4.9 x 1023 molecules D. None of the choices presented
9. Choose that doesn’t belong to the group
A. Moles C. Mass
B. Atoms D. Particles
7
10.Which of the stoichiometry problems involves the longest multi-step conversion?
A. Mole-mole C. Mass-particle
B. Mass-mass D.