ICP Unit 3 Post Test: Chemical Reactions

What does one mole of H2O correspond to?

• 6.02 × 10^23 molecules of H2O

• 6.02 × 10^23 atoms of H and 6.02 × 10^23 atoms of O

• 6.02 × 10^23 atoms of O

• 6.02 × 10^23 atoms of H

Tags

NGSS.HS-PS1-7

The atomic mass of carbon is 12.01, sodium is 22.99, and oxygen is 16.00. What is the molar mass of sodium oxalate (Na2C2O4)?

• 134.00g

• 133.00 g

• 50.91 g

• 66.91 g

• 121.81 g

The atomic mass of hydrogen is 1.01. What is the mass of hydrogen in one mole of aluminum hydroxide (Al(OH)3)?

• 1.01 g

• 1.01 kg

• 3.01 g

• 3.03 g

• 3.03 kg

The atomic mass of nitrogen is 14.01, hydrogen is 1.01, sulfur is 32.07, and oxygen is 16.00. What is the molar mass of ammonium sulphate [(NH4)2SO4]?

• 63.09 g

• 84.17 g

• 114.12 g

• 118.16 g

• 132.17 g

• 40.08 kg

• 400.8 g

• 40.08 g

• 6.02 kg

• 6.02 g

Which is the next logical step in balancing the given equation? CS2(l) + Cl2(g) → CCl4(l) + S2Cl2(l)

• Place the coefficient 2 in front of sulfur dichloride (S2Cl2).

• Place the coefficient 3 in front of the chlorine molecule.

• Leave the equation alone as it is already balanced.

• Place the coefficient 4 in front of carbon disulfide(CS2).

• Place the coefficient 2 in front of carbon tetrachloride(CCl4).

Tags

NGSS.MS-PS1-5

Which statement is true for balanced chemical equations?

• Chemical equations do not provide an accurate way of describing reactions.

• Chemical equations are not recognizable by speakers of all languages.

• Chemical equations provide a qualitative and quantitative description of a reaction.

• Chemical equations provide only a qualitative description of a reaction.

• Chemical equations state the reaction in words instead of abbreviations.

What do the symbols in parenthesis indicate? C7H16 (l) + 11O2 (g) → 7CO2 (g) + 8H2O (l)

• the physical state of each reactant and product

• the catalyst used in the reaction

• the number of atoms of each reactant and product

• the unit of reactant and product

• the rate of the chemical reaction

Is this equation completely balanced? 2C8H18 + 25O2 → 16CO2 + 18H2O

• No, because the number of carbon, hydrogen & oxygen atoms on both sides of the equation are not equal.

• No, because the number of oxygen atoms on both sides of the equation are not equal.

• Yes, because all of the coefficients are in their lowest whole number ratio.

• No, because the number of hydrogen atoms on both sides of the equation are not equal.

• Yes, because the number of products is equal to the number of reactants.

Tags

NGSS.HS-PS1-7

Which of the following displacement reactions can occur?

• CuSO4 + Ag → Cu + AgSO4

• 2Ba(NO3)2 + Zn → 2Ba + Zn(NO3)2

• 2AgNO3 + Zn → 2Ag + Zn(NO3)2

• MgSO4 + Zn → ZnSO4 + Mg

• 2NaNO3 + Zn → 2Na + Zn(NO3)2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2