Part Per Million
What is the concentration in ppm if 0.2g of NaCl is dissolved in 1000g of water?
19.9996ppm
What is the point of calculating molarity?
To determine the concentration in mol/L of a solution
What is the specify heat capacity of water? (with units)
4.18 J/g*K
1400000
1.4X106
How many moles are in 22 grams of argon?
0.55mol
Which unit is used to express the concentration of a solution?
a) L/s
b)J/g
c)ppm
d)kPa
ppm
What units does molarity have?
mol/L
A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.
0.46g/J*C
0.00067
6.7x10-4
What is the correct formula for calculating moles?
given mass/GFM
What is the total mass of solute in 1000g of a solution having a concentration of 5ppm?
0.005g
What is the molarity of a solution that has 0.05mol of potassium in a 1000L solution?
0.00005M
How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/g°C?
297C
567
5.67x102
What is the gram formula mass of C12H22O11?
342.3 g/mol
What is the concentration in ppm of selenium if 1.3 milligrams is found in 2500 kg of soil?
0.00052ppm
How many moles of LiBr are need to make a 0.5M solution in 100L of solution?
50g
25.0 g of mercury is heated from 25°C to 155°C, and absorbs 455 joules of heat in the process. Calculate the specific heat capacity of mercury.
0.14 J/g*°C
0.00567
5.67x10-3
How many grams are in 4.5 moles of sodium fluoride, NaF?
189g
What is the ppm of calcium in a 15 grams soil sample if it is found that there is 98 micro-grams of calcium in the sample? (1 gram = 1,000,000 micro-grams)
6.33
What is the concentration of a solution with a volume of 2500mL containing 660g of CaCl2?
2.4M
What mass of water will change its temperature by
3 °C when 525 J of heat is added to it?
40g
4.5x109
450000000
How many grams are in 3.3 moles of potassium sulfide?
363g