Which of the following reactions shows a chemical change producing a gas? A. 2AgNO3(aq) + CaBr2(aq) → 2AgBr(s) + Ca(NO3)2(aq)
B. 2CH2OH(1) + 302(g) → 2C02(g) + 4H20(1)
C. H2(g) + O2(g) → H20(1)
D. NaCl(s) + NaCl(aq)

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

How is the atomic number of a nucleus changed by alpha decay

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.)