1. The burning of propane creates different substances: propane and oxygen combine to create water and carbon dioxide:
<span><span>C<span>3</span>H<span>8</span></span> + 5 <span>O<span>2</span></span> becomes 3 CO2 + 4 <span>H<span>2</span>O</span> + heat
</span><span>
2. When NaCl melts, it is changing state, but it is still the same NaCl.
3. When gaseous CO2 deposits it is changing state, but it is still the same CO2.
4. When (presumably liquid) water solidifies, it is changing state, but it is still the same water.
So the answer is 1.</span>
Answer:
4204 K
Explanation:
Step 1: Data
<em>Given data</em>
- Density of uranium hexafluoride (ρ): 0.5820 g/L
- Pressure of uranium hexafluoride (P): 0.5073 atm
<em>Required data</em>
- Universal gas constant (R): 0.08206 atm.L/mol.K
- Molar mass of uranium hexafluoride (M): 352.02 g/mol
Step 2: Calculate the temperature of the gas
We will use the following expression derived from the ideal gas equation.
P × M = ρ × R × T
T = P × M/ρ × R
T = 0.5073 atm × (352.02 g/mol)/(0.5820 g/L) × (0.08206 atm.L/mol.K)
T = 4204 K
MFe: 56 g/mol
..........
56g ----- 1 mol
5g ------- X
X = 5/56 = 0,089 moles of Fe
56g ----- 6,02×10²³ atoms
5g ------- X
X = (5×6,02×10²³)/56
X = 0,5375×10²³ = 5,375×10²² atoms of Fe
:•)
Li2O + H2O → 2LiOH
This is the answer
3rd blank write 2
