What is the percent composition of nitrogen in Ca (NO3) 2?

Propane burns according to the following equation: C3H8 (g) + O2 (g) → CO2 (g) + H2O (g) If 465 mL of oxygen at STP is used in the reaction, what volume of CO2, measured at 37.0oC and 98.59 kPa.

How much heat is needed to raise the temperature of 8g of water by 18oC? Your Answer:

A student stated, there are 5 molecules of glucose (C6H12O6). A total of 30 atoms of carbon, 60 molecules of hydrogen, and 50 elements of oxygen.

What is the numerical meaning for kilogram?

Why is the solubility of KHP in water greater than many fatty acids with six or more carbons?

Mizar is a star system that is composed of two pairs of stars, mizar A and mizar B, or four stars in total. What do astronomers call a system that is composed of more than two starts?

A 25.00 g solid sample of Ca (OH) 2 was added into 1250 mL of 0.400 M HCl aqueous solution. The temperature of the solution was decreased from 36.6oC to 20.0oC. Assuming Ccal of the reaction is 5.225 kJ/oC, how much heat is involved in the reaction?

Why isn't a largest predator just at the top of a food web?

What is the electrical charge of a cation? A. zero B. positive C. negative

You measure the mass of a model car to be 230 grams. The actual mass is 218 grams. what is your percent error