Reactions
Write the balanced chemical equation for the following reaction: Dinitrogen tetrahydride reacts with oxygen gas to produce nitrogen gas and water.
N2H4 + O2 --> N2 + 2H2O
Calculate the molar mass of Mg(NO3)2
148.31 g/mol
How many moles of HCl would be produced with 3.17 moles of CH4?
CH4 + 4Cl2 --> CCl4 +4HCl
12.7 mol HCl
If 1.3 mol NiSO4 is dissolved into 156 mL of H2O, what is the molarity of the solution?
8.3 M
In a nonflexible container, if the amount of collisions between the particles and the walls increases what gas variable will be directly affected?
pressure
Indicate which metal could react with the following compound, then write the balanced chemical equation: Copper (II) nitrate reacts with...
Gold, Zinc, or Platinum
Zn. Cu(NO3)2 + Zn --> Cu + Zn(NO3)2
How many moles are in 46.3 g of C3H4O?
0.826 mol Fe
If we have 2.11 moles of chromium metal reacting, how many grams of chromium (III) oxide (MM = 152 g/mol) will be produced?
4Cr + 3O2 --> 2Cr2O3
160. g Cr2O3
What will be the new concentration of a 1.50 M solution be if we take 37 mL of it and dilute it by adding it to 63 mL of water?
0.56 M
A sample of Ne at 0.203 atm experiences a change in volume from 34.466 L to 4.756 L. What is the new pressure in atmospheres?
1.47 atm
Write the balanced chemical equation for the combustion of ethane (C2H6) and oxygen gas.
2C2H6 + 7O2 --> 4CO2 + 6H2O
How many atoms are in 67.0 grams of cobalt?
6.85 x 1023 particles
In an experiment, 30.0 g of solid aluminum is reacted with 35.0 g of oxygen gas, and produces 43.9 g of Al2O3. If the theoretical yield is 56.7 g of Al2O3, what is the percent yield of the reaction?
77.4%
In 74 mL of 0.60 M HBr what is the mass in grams of HBr present in the solution?
3.6 g HBr
The temperature of a sample of ClF5 is changed, causing a change in volume from an original volume of 56.3 L to a new volume of 76.64 L. If its NEW temperature is 918 oC, what was its INITIAL temperature in Kelvin?
875 K
Bromine reacts with Tin to form Tin (IV) Bromide.
Write out the balanced equation for this.
Was bromine oxidized or reduced?
2Br2 + Sn --> SnBr4
Bromine is reduced
A compound is found to contain 23.3% magnesium, 30.7% sulfur, and 46.0% oxygen. What is the empirical formula of this compound?
MgSO3
If 2 NH3 + 3 I2 → N2 + 6 HI
275.8 grams of I2 (MM = 253.8) are reacted with 440 grams of NH3 (MM = 17.04 g/mol), how many grams of N2 (MM = 28.02 g/mol) will be produced?
10.15 g N2
How many grams of silver chromate will be produced when 150. mL of 0.500 M silver nitrate are added to potassium chromate?
2 AgNO3 (aq) + K2CrO4 (aq) --> Ag2CrO4 (s) + 2 KNO3 (aq)
(molar mass of Ag2CrO4 is 331.73 g/mol )
12.4 g Ag2CrO4
The pressure of a 7.21 mol sample of ClO2 in a 76 L container is measured to be 0.4906 atm. What is the temperature of this gas in Celsius?
-210 C
Which reaction happens? Finish it and balance it, including states of matter.
_CuCl2 (aq) + _Zn(NO3)2 (aq) --> ?
_Al2(SO4)3 (aq) + _NH4OH (aq) --> ?
Al2(SO4)3 (aq) + 6NH4OH (aq) -->
2Al(OH)3 (s) + 3(NH4)2SO4 (aq)
Find the molecular formula of a compound that is 87.4% nitrogen and 12.6% hydrogen, and has a molar mass of 32.05 g/mol.
N2H4
Take the reaction: 2 H2 + O2 --> 2 H2O
In an experiment, 68 g of H2 are allowed to react with 212 g of O2 .
How much of the EXCESS reactant remains after the reaction?
(O2 is LR ; H2 is ER)
26.8 grams of H2 are USED
68 g - 26.8 g = 41.2 g H2 are left over
0.060 L of 0.322 M potassium iodide are combined with 0.020 L of 0.530 M lead (II) nitrate. How many grams of lead (II) iodide will be produced?
2 KI (aq) + Pb(NO3)2 (aq) -> 2 KNO3 (aq) + PbI2 (s)
(molar mass of PbI2 is 461.01 g/mol )
4.45 g PbI2
How many grams of chlorine gas must react to produce 16 L of nitrogen gas at 1.2 atm and 23 oC?
2 NH3 (g) + 3 Cl2 (g) ---> N2 (g) + 6 HCl (g)
PV = nRT ; R = 0.0821
170 g Cl2