Recent questions in Chemistry

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CHEMISTRY MULTIPLE CHOICE

Andrey Semakin asked Dec 14, 2024

by Andrey Semakin

8.5k points

1 answer

2 votes

59.6k views

State the chemical symbol for each of the following elements: sodium, potassium, iron, calcium, oxygen, carbon, hydrogen, copper, and chlorine

Rango asked Dec 14, 2024

by Rango

7.6k points

1 answer

1 vote

180k views

How much time would it take for a sample of p-32 to decay from an activity of 10,000 counts per minute to 8,500 counts per minute? A. 100 minutes B. 200 minutes C. 300 minutes D. 400 minutes

Castro Roy asked Dec 14, 2024

by Castro Roy

8.5k points

1 answer

3 votes

50.1k views

Is albedo a positive or negative feedback? And why

Anumi asked Dec 14, 2024

by Anumi

8.7k points

2 answers

1 vote

57.8k views

The element antimony has an atomic weight of 121.957 amu and only two naturally-occurring isotopes. One isotope has an abundance of 61.30% and an isotopic mass of 120.804 amu. Based on this data, what

Falsoon asked Dec 14, 2024

by Falsoon

8.2k points

1 answer

3 votes

196k views

Calculate the pH of a 0.200 M HCl solution at 25°C A) 0.30 B) 1.30 C) 2.30 D) 3.30

Ashish Augustine asked Dec 14, 2024

by Ashish Augustine

7.5k points

1 answer

5 votes

128k views

Why does water have a higher melting point than chlorine and oxygen have?

Wuaner asked Dec 14, 2024

by Wuaner

8.3k points

1 answer

1 vote

221k views

Complete and balance the molecular equation for the reaction of aqueous ammonium bromide, NH₄Br , and aqueous lead(II) acetate, Pb(C₂H₃O₂)₂ . Include physical states. molecular equation: Enter the balanced

RichTheCreator asked Dec 14, 2024

by RichTheCreator

8.4k points

1 answer

4 votes

224k views

Beeswax is a natural wax produced by honeybees. Ceretec acid is a long-chain saturated fatty acid most commonly found in beeswax. The formula for cerotic acid is shown below. How many more atoms of hydrogen

BioMan asked Dec 14, 2024

by BioMan

7.3k points

1 answer

0 votes

173k views

The first sugar residue to become part of the core oligosaccharide is?

Zakhar Rodionov asked Dec 14, 2024

by Zakhar Rodionov

7.6k points

1 answer

1 vote

198k views

Which of the following gases has the greatest density at a temperature of 30 °C and a pressure of 750 torr? A methane B. ammonia C. carbon dioxide D. sulfur dioxide

Amalo asked Dec 14, 2024

by Amalo

7.9k points

1 answer

0 votes

165k views

Which rocky planet’s hydrosphere is most different from Earth’s mars?

StevenWilkins asked Dec 14, 2024

by StevenWilkins

8.0k points

1 answer

2 votes

144k views

Carbonic acid is a buffer that contributes to pH stability in human blood. Write out this chemical equation and explain what happens if our blood increases or decreases in pH

Colin Cochrane asked Dec 14, 2024

by Colin Cochrane

8.5k points

1 answer

5 votes

82.8k views

When 3.25 grams of Magnesium was mixed in a test tube with hydrochloric acid, and placed in a calorimeter, the temperature of the water increased by 15.4 degrees. Based on this information, what type of

Claymation asked Dec 14, 2024

by Claymation

9.1k points

1 answer

1 vote

41.2k views

What are the two products for when limestone decomposes?

Swapneel asked Dec 14, 2024

by Swapneel

7.5k points

2 answers

5 votes

102k views

Which of the following can be sterilized using high temperature methods? 1) complex surgical instruments 2) heat-sensitive instruments 3) all of the above 4) single-use instruments

Michael Coker asked Dec 14, 2024

by Michael Coker

7.7k points

1 answer

2 votes

72.1k views

By adding protons to an atom its overall charge will... ★ become more negative ★ become more neutral ★ become more positive ★ stay the same

Obiwahn asked Dec 14, 2024

by Obiwahn

8.1k points

2 answers

0 votes

41.4k views

"Which expression has the least number of terms? 2 + x 18xyz x + y -z Tyz-3"

Kevin Yan asked Dec 14, 2024

by Kevin Yan

8.1k points

1 answer

5 votes

53.1k views

What is the name of the particle having the following atomic notation He? A neutron B) beta c) none of the above D gamma E alpha

Prabhakar Reddy asked Dec 14, 2024

by Prabhakar Reddy

8.0k points

1 answer

4 votes

3.5k views

Examine the reaction/mechanism provided for the acid-catalyzed dehydration of 2-methyl-2-butanol. select all the following statements that are correct. a. 2-methyl-1-butene is also produced by the dehydration.

Drachenkatze asked Dec 14, 2024

by Drachenkatze

7.6k points

1 answer

4 votes

71.6k views

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