MsP Test

How many grams are in 7.8 moles of NaCl?

• 476grams
• 460 grams
• 452 grams
• 462 grams

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from  6 moles H₂? 

• 4 moles Fe
• 6 moles Fe
• 9 moles Fe
• 2 moles Fe

Tags

NGSS.HS-PS1-7

1) Which is an acceptable fraction (mole ratio) when converting 16 moles of HCl to moles of H₂SO₄? Look at the image attached.

2 HCl + 1 Na₂SO₄ → 2 NaCl + 1 H₂SO₄

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3) How many grams of Cu(NO₃)₂ would be formed if 0.1 moles of Ag was also produced in the reaction?

2 AgNO₃ + 1 Cu → 1 Cu(NO₃)₂ + 2 Ag

• 18.8 g Cu(NO₃)₂

• 37.5 g Cu(NO₃)₂

• 21.6 g Cu(NO₃)₂

• 9.4 g Cu(NO₃)₂

2) How many moles of O₂ (g) are needed to react completely with 12.0 moles of Cr (s) in order to form Cr₂O₃(s)?

4 Cr _(s) + 3 O_2(g) → 2 Cr₂O_3(s)

• 12 mol O₂

• 16 mol O₂

• 9 mol O₂

• 6 mol O₂

6) In an experiment you have 10.0 moles of H₂ and 10.0 moles of O₂ how many moles of H₂O will you produce?

*HINT: you need two conversion tables*

2 H₂ + 1 O₂ → 2 H₂O

• 30 mol H₂O

• 20 mol H₂O

• 10 mol H₂O

• 5 mol H₂O

What is the molar mass of table salt (NaCl)?

• 116.89 g/mol

• 35.45 g/mol

• 22.99 g/mol

• 58.44 g/mol

Tags

NGSS.HS-PS1-7

Cl₂ + 2KBr → Br₂ + 2KCl

How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

KCl = 74.55 g/mol ; KBr = 119.00 g/mol

• 749 g

• 223 g

• 479 g

• 814 g

Tags

NGSS.HS-PS1-7

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the _____.

• theoretical yield

• mole ratio

• actual yield

• percentage yield

What is the measured amount of a product obtained from a chemical reaction?

• mole ratio
• theoretical yield
• percentage yield
• actual yield

Tags

NGSS.HS-PS1-7