Molarity (M) is moles over liters (moles/liters), so convert grams to moles using the molar mass of MgO and then divide the moles of MgO over the liters given.
So it would look like this:
Step 1: 62.5 g MgO x (1 mole MgO/40.31 g MgO) = 1.55 mol MgO
Step 2: 1.55 mol MgO/1.5 L = 1.03 M MgO
Answer:
A perfect mold of a dinosaur bone
Answer:
2 Na + 1 Cl2 -> 2 NaCl
Explanation:
The answer is really simple, because if you have 1 nonmetal element that has a subscript of 2, you need to multiply the product and the first reactant by 2 to balance it.
Answer:
S + 2CO = SO2 + 2C
First, look for the amount of substance of sulfur:
n(S) = m / M
n(S) = 14.8 g/32 g / mol = 0.4625 mol
n(CO) = m (CO) / M (CO)
M(CO) = 12 + 16 = 28 g/mol
n(CO) = 19.9 g/28 g/mol = 0.71 mol
S in excess, so for calculating we take CO:
n(SO2) = n(CO)/2 = 0.71 mol/2 = 0.355 mol
m(SO2) = M(SO2)*n(SO2)
M(SO2) = 32 + 16*2 = 64 g/mol
m(SO2) = 64 g/mol * 0.355 mol = 22.74 g