Ask a New Question

A 249-gram sample of water

Plaster of Paris is the compound calcium sulfate hemihydrate, CaSO4*1/2H2OWhat mass of water is liberated when a 2.763 gram
1. 1 answer
2. asked by Roy
3. 1,536 views
A sample of water is heated from 35 C to 45 C with 1600 joules. What is the mass of the sample?A 15-gram sample of water has an
1. 1 answer
2. asked by Anonymous
3. 368 views
Need help with solving.The energy needed to vaporize a sample of water is 2.26 kj of energy per 1 gram of water. How hot would a
1. 2 answers
2. asked by Monica
3. 168 views
a 5.00 gram sample of a metal is heated to 80 degrees Celsius and is placed in a 100 gram sample of water. the temperature of
1. 1 answer
2. asked by Hazard
3. 661 views
A chemist takes a 647 gram sample of this hydrate. She removes all the water possible from the sample and collects it. To this
1. 2 answers
2. asked by John
3. 655 views
If a 40 gram sample of radioactive isotope was present at 4pm, but a 5 gram sample remained at 4:30 pm, what is the half-life in
1. 1 answer
2. asked by Jason
3. 592 views
A 5.00 gram sample of aluminum pellets (specific heat capacity = 0.89 J/g*C) and a 10.00 gram sample of iron pellets (specific
1. 2 answers
2. asked by Anonymous
3. 1,363 views
A sodium hydroxide sample is contaminated with sodium chloride. A 0.240 gram sample of this impure sample is dissolved in water
1. 1 answer
2. asked by Sam
3. 1,212 views
For a 8.88 gram sample of ice at -43.6°C , what is the minimum amount of heat (in kJ) needed to convert the sample to liquid
1. 2 answers
2. asked by Please Help
3. 912 views
A 3.48 gram sample of sodium sulfate hydrate lost 1.35 gram of water when heated to constant weight. What is the formula of the
1. 1 answer
2. asked by Jenny
3. 641 views