This man is using a block and tackle to lift a heavy bale of cotton. the block and tackle contains which simple machine?

How can you separate a solid from a liquid?

If all the N2 and H2 are consumed, what volume of NH3, at the same temperature and pressure, will be produced? At a certain temperature and pressure, 1.9 L of N2 reacts with 5.7 L of H2.

What are the 5 forms of energy

Ammonia is created in the Haber process in a rigid container (nitrogen gas plus hydrogen gas react to form ammonia gas). 10 moles of hydrogen gas are mixed with 5 moles of nitrogen gas. The initial pressure exerted on the container is 10 atm.

What is the mass of 6.8 moles of C2H2O? Round your answer to two decimal places.

How many moles of liquid water must freeze to remove 100 kJ of heat? (ΔHf = - 334 J/ g.

What is the power of a kitchen blender if it can perform 3750 joules of work in 15 seconds?

A 75.00 g a sample of a substance is analyzed and found to consist of 32.73 g phosphorus and 42.7 g oxygen. calculate the percent composition of this substance.

Which one of the following melts the fastest: rectangular prism, cylinder, and rectangular trapezoidal trough?

A 1.8-mL volume of seawater contains about 4.0 * 10^-10 g of gold. The total volume of ocean water is about 1.5 * 10^21 L. Calculate the total worth of all the gold in the world's oceans if the price of gold is $19.