Hydrogen fuel cells combine hydrogen and oxygen to produce water and energy. Assume 1 kg of fuel is used, and the mass of the water produced is 1.10 x 10-11 kg. How much energy is produced by this fuel cell?

Match the correct compound to the common name. 1. NH3 2. C6H12O6 3. H2SO4 4. CO 5. H2O2 a. carbon monoxide b. sulfuric acid c. ammonia d. hydrogen peroxide e. glucose

For each molecule of propane that burns, three molecules of carbon dioxide are produced. How many total oxygen atoms are in those molecules?

What makes orange juice acid?

A laser produces 17.0 mW of light. In 4.00 hr, the laser emits 6.04*1020 photons. What is the wavelength of the laser?

4 Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue. The substance in the beaker A. is a base. B.

Сколько граммов соли образуется, если в раствор, содержащий 9,8 г серной кислоты, добавим другой раствор, имеющего 10 г гидроксида натрия?

Why do scientific theories change?

How many atoms are present in 34.69 moles of Mg

The peak is intensity for our sun on a black body curve would be in which of the following wavelength ranges? 0.01-10nm 10-380nm 560-600nm 1,000,000-100,000,000nm

What is the uppermost, horizontal area of a page? a. Footer b. Header c. Lead d. Title a. DVI b. Firewire c. PS/2 d. USB