Chemistry homework help

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Online Chemistry Homework

These are the instructions:

go to cengage.com/owl

click on general chemistry log on

scroll all the way doen until you see General Chemistry, 10th Edition ; Ebbing, Gammon; ISBN: 978-1-111-58087-2 (also for Hybrid Edition, ISBN: 978-1-111-98947-7 and click on it

Chemistry Study guide terms - PLease Complete

Chemistry study guide - Answer best to your ability, explain processes, etc, try to keep brief the answers so my son can can study and be able to get the jist of the material, etc

Attachments: 
application/msword icon2nd_semester_study_guide.doc

Activity needed in 2 days

all questions completed need an 80% or higher

Attachments: 
application/vnd.openxmlformats-officedocument.wordprocessingml.document iconactivity6u4.docx

need help ASAP

4. When 15.0 g of steam drops in temperature from 275.0 °C to 250.0 °C, how much heat energy is released? (Cp of H2O = 4.184 J/g °C)

5. How much heat (in J) is given out when 85.0 g of lead cools from 200.0 °C to 10.0 °C? (Cp of Pb = 0.129 J/g °C)

6. A certain mass of water was heated with 41,840 Joules, raising its temperature from 22.0 °C to 28.5 °C. Find the mass of the water, in grams. (Cp of H2O = 4.184 J/g °C)
7. How many joules of heat are needed to change 50.0 grams of ice at -15.0 °C to steam at 120.0 °C? (Cp of H2O = 4.184 J/g °C)

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