Chemistry Spring final Review

single replacement

100

predict the products Zn (s)+CuSO4(aq)

ZnSO4(aq)+Cu (s)

200

Fe (s)+2AgNO3(aq) 

will reaction happen why or why not

Yes since the Iron (Fe) is high on the activity series chart is will replace Silver (Ag)

300

predict the products 

Cl2(g)+2KI(aq)

2KCl(aq)+I2(s)

400

predict the products 

Mg (s)+2HCl(aq)

MgCl2(aq)+H2(g)

500

Will reactions happen

Cu (s)+NaNO3(aq)

no

Double replacement

100

What are the products 

Na2SO4(aq)+BaCl2(aq)

2NaCl(aq)+BaSO4(s)

200

What are the products 2KI(aq)+Pb(NO3)2(aq)

2KI(aq)+Pb(NO3)2(aq)

300

what are the products 

3CaCl2(aq)+2Na3PO4(aq)

Ca3(PO4)2(s)+6NaCl(aq)

400

What are the products 

3(NH4)2S(aq)+2Fe(NO3)3(aq)

3(NH4)2S(aq)+2Fe(NO3)3(aq)

500

What are the products 

Na2CO3(aq)+2HCl(aq)

2NaCl(aq)+H2O(l)+CO2(g)

mole conversion

100

n the reaction below, how many moles of water (H₂O) are produced when 2.00 moles of hydrogen gas (H₂) react?

2H₂+O₂→2H₂O

2 moles H₂O

200

How many moles are in 36.0 grams of water (H₂O)?

2

300

What is the mass of 0.75 moles of carbon dioxide (CO₂)?

33

400

How many molecules are in 0.25 moles of methane (CH₄)?
(Use Avogadro’s number: 6.022×10²³)

1.506×10²³molecules

500

How many moles are in  3.01×10²³  of sodium chloride (NaCl)?

≈0.500mol

Gas laws

100

A gas has a volume of 3.00 L at a pressure of 2.00 atm. What will the volume be if the pressure increases to 4.00 atm, assuming constant temperature?

1.5L

200

A gas occupies 2.50 L at 300 K. What volume will it occupy at 400 K, if pressure remains constant?

3.33L

300

A gas has a pressure of 1.20 atm at 273 K. What is the pressure at 546 K, assuming volume remains constant?

2.4atm

400

A gas has a volume of 5.00 L at 1.00 atm and 300 K. What is the volume at 2.00 atm and 400 K

3.33L

500

A gas has a volume of 3.00 L at 1.00 atm and 273 K. What is the volume at 2.00 atm and 300 K?

≈1.65L

Random skills

100

A compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass.
What is the empirical formula of the compound?

CH2O

200

A compound has an empirical formula of CH₂O and a molar mass of 180 g/mol.
What is the molecular formula?

C₆H₁₂O₆

300

How much heat is required to raise the temperature of 250.0 g of water from 25.0°C to 75.0°C?
(The specific heat capacity of water is 4.18 J/g°C.)

52250 J or 52.25 kj

400

Use the following thermochemical equations to determine the enthalpy change (ΔH) for the reaction:

C(graphite)+1/2 O₂(g)→CO(g)

Given:

1.C(graphite) + O₂(g) → CO₂(g)    ΔH = –393.5kJ
2. CO(g) + ½O₂(g) → CO₂(g)    ΔH = –283.0 kJ

-110.5 KJ

500

At 298 K, the decomposition of hydrogen peroxide occurs according to the reaction:

2H2O2(l)→2H2O(l)+O2(g)

Given:

• ΔH° = –196.0 kJ

• ΔS +125.0 J/mol·K

is is spontaneous or not

- 233.5 spontaneous