A sample of hydrated calcium sulfate has a mass of 20.88 g. After it is heated, it has a mass of 16.51 g. What is the percentage by mass of water in the hydrate

Describe what you know about the motion of particles.

Be sure to answer all parts. consider the combustion of butane gas: c4h10 (g) + 13 2 o2 (g) → 4co2 (g) + 5h2o (g) (a) predict the signs of δs o and δh o. δs o : negative positive δh o : negative positive (b) calculate δg o at 298 k. kj

The molecules CH4 and CH3Cl both have tetrahedral shapes. Why is CH4 nonpolar whereas CH3Cl is polar?

If a patient/'s blood pressure is 145 over 85 mmHg, what is it in atmospheres (atm) ?

Which statement is true about tomato juice? A) It is an acid. B) It has a pH of 7.0. C) It is strongly basic in nature. D) It is a weak hydrophobic substance.

The envelope of air that surrounds the earth is called

What is the chemical formula for potassium permanganate?

Is it always possible to identify something as an element compound pure substance or mixture

Why would someone weigh less on Pluto?

HNO3 + H2O > H3O (aq) + NO3 - (aq)