How do you calculate the percent by mass of an element in a compound?

A student measures the frequency of a wave as 2 waves/second, and the wavelength as 40 cm/wave. Use the velocity equation (v = f * λ) to calculate the speed of the wave. Show your work and include units.

Determine the percent yield if 155g of Hydrogen should have been produced, but your experiment yielded 135g.

What happens when you add more cells in a series circuit?

Aluminum fluoride contains only aluminum and fluorine. what is the formula for this compound?

Will walks his dog around the block they spent an hour walking and make it 4 km what is there speed

Aluminum and Oxygen gas will react to form Aluminum Oxide (Al2O3). When the equation is balanced, How many moles of Al2O3 are formed when a mixture of 0.36 moles Al is ignited? a. 0.12 b. 0.18 c. 0.28 d. 0.46

Which state of the West produces the widest varieties of fruits, vegetables, and nuts? A) California B) Colorado C) Wyoming D) Alaska

A chemical engineer for a fertilizer company is determining the most efficient way to produce ammonia. the engineer carries out the haber reaction under four different conditions.

What type of Bond exist in a molecule of hydrogen Iodide

Which common material is an example of a polyamide?