In a hydrogen fuel cell, hydrogen gas and oxygen gas are combined to form water. write the balanced chemical equation describing this reaction (using lowest whole-number coefficients.

A certain shade of blue has a frequency of 7.02 * 1014 Hz. What is the energy of exactly one photon of this light?

The concentration of gallium in silicon is 5.0 * 10-7 at%. What is the concentration in kilograms of gallium per cubic meter?

What volume will 1.56 liters of a gas at 27°C and 745 mmHg of pressure occupy at 100°C and 700 mmHg of pressure?

Scientists view a disproved hypothesis as: A wasted effort incorrect answer B An exception incorrect answer C An opportunity to investigate further incorrect answer D The goal of the scientific process

Which do all groups of plants have these are the choices A. chloroplasts B. roots C. spores D. tubes

Which statement about Clinton s impeachment is true? A. Clinton s impeachment was supported by the majority of Americans. B. The impeachment charges were based on fraud found during the Whitewater investigation. C.

The value of partition function at 0 k should be a. zero b. infinity c. 1 d. 10^25

Is change in atmospheric co2 levels likely to impact marine life

Which of the following is true concerning atoms? A. Atoms are made of even smaller substances called subatomic particles B. The properties of atoms cannot be measured or observed

How to graph atomic radius