1. An unknown metam M reacts with sulfur to form a compound with the formula M2S3. If 3.12g of M reacts with 2.88g of S, what re the names of M and M2S3?
2. 2.88g S ( 1 mol of S/ 32.07 g S) = 0.09 mol of S, that's all i can think of really.
3. Haven't been able to get one.
Ok, thanks, I'm not that good with sig figs and was going google on how to do it, can you tell me how to find 1kg in bone for the second problem, I don't know how to set it up.
1. Graphite is a crystalline form of carbon used in "lead" pencils. How many moles of carbon are in 315mg of graphite?
2. 315mg = .315g
0.315 g C (1 mol C / !2 g C)
3. 0.026 mol C
2.1 Manganese is a transition element essential for the growth of bones. What is the mass in grams of 3.22 x 10^20...
Homework Statement
3 moles of X and 2.8 moles of Y are allowed to react. How much X will actually react?
X + 5Y > 3Z
Homework Equations
Not sure
The Attempt at a Solution
Not sure
Can you tell me if the elements and compounds change in the equation, like do they all stay the same like gas, liquid or solid, or do any of them change?
1. Chromium(III) Oxide reacts with Hydrogen Sulfide(H2S) gas to form Chromium Sulfide and water.
CR2O3(s) + H2S(g) = Cr2S3(s) + H2O (l)
to produce 439g of Cr2S3.
a. How many moles of Cr2O3 are required?
b. How many grams of CR2O3 are required?
2. Not sure how to set this up...