Recent questions in Chemistry

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What are ornithine and citrulline and what is special about them?

Altimus Prime asked Sep 28, 2024

by Altimus Prime

8.6k points

1 answer

5 votes

104k views

How many grams of KO₂ are needed to produce 660.0L of O2 at 19.0C and 1.00atm? 4KO₂(s) + 2CO₂(g) --> 2K₂CO₃(s) + 3O₂(g)

Izstas asked Sep 28, 2024

by Izstas

7.9k points

1 answer

2 votes

110k views

Question 9 of 10 Which of the following phrases best describes the term scientific mode?? OA. An experiment in which variables are controlled OB. A simplified representation used to explain or make predictions

Bliss asked Sep 28, 2024

by Bliss

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1 answer

0 votes

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What are the electron-pair geometry and the molecular structure of each of the following molecules or ions? a) Trigonal Planar, Trigonal Planar b) Tetrahedral, Bent c) Linear, Linear d) Octahedral, Square

Manux asked Sep 28, 2024

by Manux

8.2k points

1 answer

4 votes

152k views

What is the mass of 8.0 x 10^25 formula units of sodium chloride?

Akardon asked Sep 28, 2024

by Akardon

8.1k points

1 answer

0 votes

95.6k views

Ion channels that can be opened by physiological stimuli are said to be A. polar. B. aquaporins. C. hypertonic. D. gated.

Tim Hong asked Sep 28, 2024

by Tim Hong

8.2k points

1 answer

2 votes

52.8k views

If u, v, and w are unit vectors as shown below, find the magnitude of u + v + w. a) |u + v + w| = |u| + |v| + |w| b) |u + v + w| = |u| × |v| × |w| c) |u + v + w| < |u| + |v| + |w| d) |u + v + w| > |u| + |v| + |w|

Wilian asked Sep 28, 2024

by Wilian

8.5k points

1 answer

4 votes

59.7k views

1M + 2Gc + 3Cp 1Gc2MCp3 There are 6 pieces (reactants) to the left of the arrow and 1 piece to the right. This is supposed to represent a balanced equation, so how can 7 = 1?

Chris Nauroth asked Sep 28, 2024

by Chris Nauroth

8.1k points

1 answer

0 votes

124k views

Water and Vrsol (a paint thinner) are immiscible liquids. Describe an experiment using these two materials that would determine whether polystyrene foam is polar or non-polar.

Advantej asked Sep 28, 2024

by Advantej

7.9k points

1 answer

1 vote

215k views

Why is zinc oxide eugenol cement considered the choice for temporary restorations?

Hannes Landeholm asked Sep 28, 2024

by Hannes Landeholm

7.5k points

1 answer

2 votes

83.8k views

The table below shows the volume of two samples, X and Y, when placed in three containers of different volumes. Volume of Samples Volume of Container Volume of Sample X Volume of Sample Y 200 mL 200 mL

Rshahriar asked Sep 28, 2024

by Rshahriar

9.5k points

1 answer

3 votes

121k views

Which of the following molecules with a trigonal planar electron geometry will be polar? 1) BF₃ 2) CH₄ 3) NH₃ 4) CO₂

Bartek Tatkowski asked Sep 28, 2024

by Bartek Tatkowski

8.0k points

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0 votes

123k views

When pH is above its pKa, it is in the: a) protonated form b) unprotonated form

Mike Trader asked Sep 28, 2024

by Mike Trader

7.7k points

1 answer

1 vote

77.4k views

The three main gases in air by volume are? A. Nitrogen, Oxygen, Carbon Dioxide B. Nitrogen, Oxygen, Hydrogen C. Oxygen, Helium, Carbon Dioxide D. Nitrogen, Oxygen, Argon

Lukeman asked Sep 28, 2024

by Lukeman

8.5k points

1 answer

2 votes

119k views

A food product must be treated with air with 25% humidity. Air with 95% humidity is available, for which it is necessary to dehumidify it in a silica gel absorber. The gel reduces air humidity by up to

Kajham asked Sep 28, 2024

by Kajham

8.4k points

1 answer

2 votes

114k views

In chemistry, the law of the conservation of energy allows for which of the following? A. energy to be lost B. energy to be stored C. energy to be created D. energy to be destroyed

Roshawn asked Sep 28, 2024

by Roshawn

8.6k points

1 answer

2 votes

214k views

Cooling food should move from 135⁰F or higher to 70⁰F in ____ hour(s).

Marcel Klehr asked Sep 28, 2024

by Marcel Klehr

8.1k points

1 answer

5 votes

64.9k views

Which one of the following would have the largest molar entropy? A. Al (s) B. S (s) C. Al₂S₃ (s)

Asri Badlah asked Sep 28, 2024

by Asri Badlah

8.1k points

1 answer

2 votes

105k views

Name four types of medically used iodine.

Claptimes asked Sep 28, 2024

by Claptimes

7.7k points

1 answer

1 vote

148k views

Complete the electron-pushing mechanism for the given reaction of 1-cyclopentylbutan-1-one.

Yuchao Jiang asked Sep 28, 2024

by Yuchao Jiang

7.9k points

1 answer

2 votes

11.6k views

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