CB

Carole Anne Bucher

Numerade Educator
Teacher

Biography

I am currently a high school teacher in New Jersey. I have a bachelor of science in Chemistry and masters degree in education.
I have taught various science courses for the least 20 years in addition to teaching Chemistry every year. I have taught Honors, College Prep and special education levels of Chemistry.

Education

Carole Anne has not yet added their education credentials.

Educator Statistics

Numerade tutor for 4 years
57 Students Helped

Topics Covered

Mastering Chemical Reactions and Stoichiometry for Optimal Results

Carole Anne's Textbook Answer Videos

1

Carole Anne's Quick Ask Videos

15:47
Chemistry 101

What is the pressure of a 34.8-L gas sample containing 7.45 mol of gas at 19.9°C? (R = 0.0821 L • atm/(K • mol), 1 atm = 760 torr)

Group of answer choices:
2.66 × 102 mmHg
6.77 × 10–3 mmHg
5.14 mmHg
1.48 × 102 mmHg
3.91 × 103 mmHg

The following gases are stored in identical flexible containers at 25°C and 1.00 atm pressure. Order the gases from highest to lowest density.

1. 200 g propane, C3H8
2. 100 g carbon dioxide, CO2
3. 50 g nitrous oxide, N2O

Group of answer choices:
1 > 2 ≈ 3
2 > 1 > 3
1 ≈ 2 ≈ 3
1 > 2 > 3
3 > 2 > 1

At 530.4 mmHg and 55.3°C, a 3.14-L sample of a hydrocarbon gas has a mass of 2.28 g. What is the formula of the gas?

Group of answer choices:
C2H4
C3H8
C3H6
C2H6
C2H2
04:35
Chemistry 101

a.) Indicate whether each of the following sets of quantum
numbers is valid or not valid. If it is not valid, indicate why. If
it is valid, indicate the orbital that it represents.
i. n = 0, l = 0, ml = 0
ii. n = 9, l = 7, ml = -4
iii. n = 5, l = 5, ml = 0
iv. n = 3, l = 1, ml = 1
b.) Give one full valid set of quantum numbers for a 5p
orbital.
04:56
Chemistry 101

a) The heat of fusion for acetone (C3H6O) is 5.69 kJ/mol. How much energy (kJ) is required to melt 85 g of C3H6O?
b) If acetone melts at -94.8 °C, then what state/s of matter (solid, liquid, and/or gas) exist/s at:
200 °C
-94.8 °C
0 °C
4. How many grams of water are evaporated when 158 kJ of energy is added to the container? Heat of vaporization of water is 40.7 kJ/mol.
06:24
Chemistry 101

1. Classify the following systems as open, closed, or isolated.
a. Concrete block
b. A living plant
c. Mercury inside a thermometer
d. The atmosphere
e. Coffee in a high-quality thermos

2. Calculate the specific heat of lead with 0.15 kg of that substance which cools from 100 °C to 29 °C and the heat released is -1.4x10^3 J.
01:31
Chemistry 101

Which will of the following would you predict to have the
smallest ionization energy in the pairing (circle one), then
explain why. Al Si P Why:

11:09
Chemistry 101

What is the molarity of HCl if 35.29 mL of a solution of HCl
contain 0.3357 g of HCl?
What is the mass (in g) of the solute in 0.590 L
of 0.61 M glucose,
C6H12O6?
If 3.97 L of
a 0.655 M H3PO4 solution
is diluted to a volume of 12.50 L, what is the
concentration (in M) of the resulting solution?
An experiment in a general chemistry laboratory calls for
a 1.40 M solution of HCl. How many mL of
12.1 M HCl would be required to
make 200.0 mL of 1.40 M HCl?
1 2 3 4 5 ... 10