ch 8 quiz q

How many moles of hydrogen are needed to react with 0.234 mol of oxygen according to this equation? 2H2(g) + O2(g) → 2H2O(g)

0.468

how many carbon atoms are there in 1.00 mol of C2H6?

1.20X10^24

How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg? 2Mg(s) + O2(g) → 2MgO(s)

101 g

K3PO4(aq) + Ca(NO3)2(aq) → Ca3(PO4)2(s) + KNO3(aq) is balanced as

2K3PO4(aq) + 3Ca(NO3)2(aq) → Ca3(PO4)2(s) + 6KNO3(aq)

how many valence electrons does carbon have?

4

Given the following equation, what is the correct form of the conversion factor needed to convert the number of moles of O2 to the number of moles of Fe reacted? 4Fe(s) + 3O2 (g) → 2Fe2O3(s)

4molFE/3molO2

the molar mass of calcium hydroxide, Ca(OH)2 is

74.10g

Which of the following correctly illustrates the conservation of mass for the reaction below? 4Na(s) + O2(g) → 2Na2O(s)

92.0 g Na, 32.0 g O2, 124 g Na2O

4.00 mole of sodium has a mass of

92.0g

what is the formula for sulfur dichloride

SCl2

In ionic compounds

metals lose their valance electrons to form positively charged cations

Silver nitrate reacts with potassium chloride to produce solid silver chloride and what substance?

potassium nitrate

what is the correct formula for iron (III) oxide?

Fe2O3

When 0.600 mol Mg3N2 reacts with 4.00 mol H2O, what is the limiting reactant? Mg3N2(s) + 6 H2O(l) → 3Mg(OH)2(s) + 2NH3(g)

Mg3N2

magnesium chloride has the formula

MgCl2

In a ___________ reaction, two or more elements or compounds form one product

combination

Zn(s)+S(s)⟶ZnS(s) is an example of which class of reaction?

combination

CH3-CH2-CH2-CH2-CH2-CH2-CH3 is called

heptane

NaF is a

ionic compound (Na has a positive charge and F has a negative charge)

Fe2(SO4)3 is called

iron (III) sulfate