How much energy must be absorbed by 85.0 g of water to increase its temperature from 283.0° C to 303.0°C?
- 7106 )
7106)
-1700)
1700J

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

What are the coefficients that will balance the skeleton equation below? n2 + h2 → nh3

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!