#2. There are 60 sec. in a minute and 60 mins. in an hour and 24 hours in a day. The math would be 60•60•60•24=5,184,000. Then, you multiply 5,184,000•7=36,288,000. Multiply 36,288,000•16=580,608,000.
#3. There are approximately 914.4 millimeters in 1 yard. So then, we multiply 914.4•54=49,377.6.
#4. I looked this one up, so I can't show the work for this one but the answer is 0.805 miles per hour.
Physical because the substance isn’t chemically changing
Answer:
Kc for this reaction is 0.06825
Explanation:
Step 1: Data given
Number of moles formaldehyde CH2O = 0.055 moles
Volume = 500 mL = 0.500 L
At equilibrium, the CH2O(g) concentration = 0.051 mol
Step 2: The balanced equation
CH2O <=> H2 + CO
Step 3: Calculate the initial concentrations
Concentration = moles / volume
[CH2O] = 0.055 moles . 0.500 L
[CH2O] = 0.11 M
[H2] = 0M
[CO] = 0M
Step 4: The concentration at the equilibrium
[CH2O] = 0.11 - X M = 0.051 M
[H2] = XM
[CO] = XM
[CH2O] = 0.11 - X M = 0.051 M
X = 0.11 - 0.051 = 0.059
[H2] = XM = 0.059 M
[CO] = XM = 0.059 M
Step 5: Calculate Kc
Kc = [H2][CO]/[CHO]
Kc = (0.059 * 0.059) / 0.051
Kc = 0.06825
Kc for this reaction is 0.06825
mass of 1 mole of N is 14g
so mass of 3.45 mole is
3.45 × 14 = 48.3 g