Are the following equations balanced or unbalanced? 1. SnO2 + 2H2 → Sn + 2 H2O

2. 4NH3 + 5O2 → 4NO + 6H2O

3. 2B2Br6 + 5HNO3 2 B(NO3)3 + HBr

4. 2KNO3 + 1H2CO3 → 1K2CO3 + 2HNO3

The compound methyl butanoate smells like apples. its percent composition is 58.8% c, 9.9% h, and 31.4% o. what’s the empirical formula ?

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %