1st Semester - Quiz 3 - 11th - Chemistry (25 - 26)

Calculatons using Molar Mass

100

Calculate the mass in grams of 1.75 mol of Mg(NO₃)₂

259.52 g

200

Double Points!!!

Calculate the mass in grams of 1.98x10²³ molecules of SrCO₃

48.54 g

300

Calculate the number of moles contained in 500 g of Na₂CO₃

4.72 mol

400

Calculate the number of molecules contained in 150 g of Li₃PO₄

7.8x10²³ molecules

500

Calculate the mass in grams of 5.68x10²² molecules of Fe₂(SO₃)₂

25.64 g

Mass Percent Composition

100

Calculate the mass percent composition of MgCl₂

Mg=25.53% & Cl=74.47%

200

Calculate the mass percent composition of N₂O₅

N=25.94 & O=74.06%

300

Double Points!!!

Calculate the mass percent composition of Sn(CN)₄

Sn=53.28%, C=21.56% & N=25.15%

400

Calculate the mass percent composition of Ni₂(CO₃)₃

Ni=39.74%, C=12.11% & O=48.42%

500

Calculate the mass percent composition of Cu(HSO₄)₂

Cu=24.65%, H=0.78%, S=24.89% & O=49.67%

Types of Chemical Reactions

100

Triple Points!!!

In this type of chemical reaction, two or more elements or compounds bond to form one product.

Combination

200

In this type of chemical reaction, an uncombined element takes the place of an element in a compound.

Single Replacement

300

What kind of reaction is the next one: 

ZnCO₃(s) CO₂(g) + ZnO(s)

Decomposition

400

What kind of chemical reaction is the next one:

 BaCl₂(aq) + K₂CO₃(aq) BaCO₃(s) + 2KCl(aq)

Double Replacement

500

What kind of chemical reaction is the next one:

 2C₂H₂(g) + 5O₂(g) 4CO₂(g) + 2H₂O(g)

Combustion

Balancing Chemical Equations

100

From left to right, fill the coefficients needed to balance the next equation:

__Al(s) + __Br₂(g) __AlBr₃(s)

2, 3, 2

200

From left to right, fill the coefficients needed to balance the next equation:

__Cr(s) +   __S₂(s)   __Cr₂S₃(s)

4, 3, 2

300

From left to right, fill the coefficients needed to balance the next equation:

C₄H₈(g) + __O₂(g) __CO₂(g) + __H₂O(g)

6, 4, 4

400

Double Points!!!

From left to right, fill the coefficients needed to balance the next equation:

Sb₂S₃(s) +   __HCl(aq)   

__SbCl₃(s) +   __H₂S(g)

6, 2, 3

500

From left to right, fill the coefficients needed to balance the next equation:

Al₂(SO₄)₃(aq) + __KOH(aq)

__Al(OH)₃(s) + __K₂SO₄(aq)

6, 2, 3

Mole & Mass Calc in Chem Equations

100

In the next chemical equation, how many moles of H₂O will be produced with 3.19 moles of O₂

 2C₂H₂(g) + 5O₂(g) 4CO₂(g) + 2H₂O(g)

1.28 mol H₂O

200

Triple Points!!!

In the next chemical equation, how many grams of SO₂ will be produced with 2.66 moles of O₂

As₄S₆(s) +   9O₂(g)   As₄O₆(s) +   6SO₂(g)

113.49 g SO₂

300

In the next equation, how many moles of HCl are needed to generate 50.5 grams of CuCl₂.

CuO(s) + 2HCl(aq) CuCl₂(aq) + H₂O(l).

0.75 mol HCl

400

In the next equation, how many grams of SO₃ will be generated with 40 grams of O₂?

2SO₂(g) + O₂(g) 2SO₃(g)

200 g SO₃

500

In the next equation, how many grams of Pb(NO₃)₂ are needed to generate 67 grams of NaNO₃?

Pb(NO₃)₂(aq) + 2NaCl(aq) PbCl₂(s) + 2NaNO₃(aq)

130.54 g Pb(NO₃)₂