I would say #3 I’m sorry if it’s wrong tho
Answer:
A copper cup with a mass of 100.0 g contains 96.0 g of water. Both. the cup and the water are at 13.0OC. If 70.0 g of a substance at 84.0OC is added to the cup, the temperature increases to 20.0OC. If the specific heat capacities of copper and water are exactly 390 and 4180 respectively, find the specific heat capacity of the substance.
Explanation:
hope this helps
The ksp = 4.87 × 10^-17
Therefore; 4.87 ×10^-17 = [Fe2+][OH-]^2 = (X)(2X)^2 = 4X^3
Hence;
4x^3 =4.87 × 10^-17
x = 2.30 × 10^-6 M
therefore the molarity is 2.3 ×10^-6 M
Thus;
The mass of Fe(OH)2 in 100 ml of water, will be given by:
= 2.30 × 10^-6 mol/L = 2.3 ×× 10^-5 mole/100 mL
= 89.86 g/mol × 2.3 × 10^-6 × 0.100 = 2.07 × 10^-5 g
= 2.07 × 10^-5 g
= 2.07 × 10^-5 g
<u>Answer:</u> The mass percent of ethylene glycol in solution is 14.2 %
<u>Explanation:</u>
We are given:
Molarity of ethylene glycol solution = 2.45 M
This means that 2.45 moles of ethylene glycol is present in 1 L or 1000 mL of solution.
- To calculate the mass of solution, we use the equation:
Density of solution = 1.07 g/mL
Volume of solution = 1000 mL
Putting values in above equation, we get:
- To calculate the number of moles, we use the equation:
Moles of ethylene glycol = 2.45 moles
Molar mass of ethylene glycol = 62 g/mol
Putting values in above equation, we get:
- To calculate the mass percentage of ethylene glycol in solution, we use the equation:
Mass of solution = 1070 g
Mass of ethylene glycol = 151.9 g
Putting values in above equation, we get:
Hence, the mass percent of ethylene glycol in solution is 14.2 %
Answer:
CasH52(1) + 38 O2(g) → 25 CO2(g) + 26 H2O(g)
Explanation: