Chemistry » Page 25

Chemistry

Darrell Barrett

When are drops of indicator most likely added to the erlenmeyer flask?

Answer Answers (2)

Chemistry

Sarahi Meyers

Assume that you dissolve some sugar in water. Explain how you could reverse this change.

Answer Answers (1)

Chemistry

Cochran

An upward force acts on a proton as it moves with a speed of 2.0 * 105 meters/second through a magnetic field of 8.5 * 10-2 tesla running from east to west. What is the force and direction of the force on the proton?

2.7 * 10-15 N to the north

2.7 * 10-15 N to the south

1.7 * 10-14 N to the north

1.7 * 10-14 N to the south

1.7 * 10-14 N downward

Answer Answers (1)

Chemistry

Marlon Dunn

The atomic mass of hydrogen-1 is 1.008 and the atomic mass of helium-4 is 4.003. Find the difference in grams between 4 moles of hydrogen and one mole of helium.

A) 4.81 x10-26 g

B) 0.029 g

C) 1.7 x 1022 g

D) 0 grams

Answer Answers (2)

Chemistry

Jeremiah Wood

A piece if copper has a volume of 100.0cm3. If the mass of copper is 890 g, what is the density of copper?

Answer Answers (1)

Chemistry

Macie Fitzpatrick

How many grams of naoh would react with 507 g fecl2 in the reaction fecl2 + 2naoh fe (oh) 2 (s) + 2nacl?

Answer Answers (1)

Chemistry

Jaylynn Mccann

Which is an unreliable source?

Answer Answers (1)

Chemistry

Keith Dunlap

Lilah runs 6m/s. how long will it take her to run 42 meters

Answer Answers (1)

Chemistry

Braelyn Leblanc

A substance that forms a vapor is generally in what physical state at room temperature?

Answer Answers (1)

Chemistry

Dania Burke

Standard pressure is 101.3 KPa, which is equal to 760. o mmHg. If gas has a pressure of 545 mmHg, what is its pressure in KPa to the proper number of significant figures?

Answer Answers (1)

Chemistry

Deborah Baird

What is the name of the element with a valence electron configuration of 4s^2

Answer Answers (1)

Chemistry

Bianca Riley

How many hours is 10:00 am to 4:45 pm?

Answer Answers (1)

Chemistry

Karsyn Marshall

If you sprayed an air freshener, where would the highest concentration of air freshener be found?

Answer Answers (1)

Chemistry

Cody Salinas

For each molecule below, specify the polarity of the bonds and the overall polarity of the molecule.? Are the bonds for each one polar or non polar? Are the molecules for each one polar or non polar? BeCl2 O3

Answer Answers (1)

Chemistry

Tatum Leonard

The characteristics of a certain gas are listed in the table.

Characteristics of a Gas

Characteristic Description

Compound

Chlorine gas

Condition

STP

Mass

3.2 grams

What is the expected density of the above sample of gas?

03.16 g/L

1.58 g/L

1.21 g/L

1.03 g/L

Answer Answers (1)