I need help with some Chemistry questions.

Oct 28th, 2014
Price: $10 USD

Question description

A 37.7-mL volume of an unknown gas is collected over water at 19 degrees Celsius and a total pressure of 770 torr. The mass of the gas is 68.6 mg.

Express all subsequent calculations to the correct number of significant figures.

a. What is the pressure of the "dry" unknown gas?

b. What volume does the gas occupy?

c. How many moles of gas are collected?

d. What is the molar mass of the gas? 

A 1.719-g sample of CaCO3 mixture is thermally decomposed, producing CaO(s) and CO2(g). After the reaction, the mixture has a mass of 1.048g.

a. How many grams and moles of CO2 are evolved?

b. How many moles and grams of CaCO3 are in the mixture?

c. What is the percent CaCO3 in the mixture?

Tutor Answer

(Top Tutor) Daniel C.
School: New York University

Studypool has helped 1,244,100 students

Review from our student for this Answer

Oct 29th, 2014
"Awesome! Exactly what I wanted."
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1819 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors