Recent questions in Chemistry

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A 0.421 g sample of an element contains 9.03×1021 atoms of the element. Determine the chemical symbol of the element.

MorganTN asked Dec 27, 2024

by MorganTN

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1 answer

4 votes

67.0k views

Classify each of the following as a noble gas representative element, or a transition metal. Also indicate whether the Na is a metal, nonmetal or metalloid.

Florik asked Dec 27, 2024

by Florik

7.9k points

1 answer

0 votes

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HCl + RbOH —> RbCl + H2O if 450 grams of H2O are produced, how many moles of HCl were reacted

FfConundrums asked Dec 27, 2024

by FfConundrums

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1 answer

4 votes

175k views

Can you think of a process not involving radioactive decay for which 14^CO2 would behave differently from 12^CO2?

Ravi Ashara asked Dec 27, 2024

by Ravi Ashara

9.0k points

2 answers

0 votes

206k views

What type of reaction is KBr + Cl2 => KCl + Br2?

Angeline asked Dec 27, 2024

by Angeline

8.5k points

1 answer

2 votes

65.8k views

The charge on the _________ ion is -3. A. acetate B. nitride C. oxide D. sulfate E. permanganate

Brad Bamford asked Dec 27, 2024

by Brad Bamford

8.0k points

1 answer

2 votes

159k views

For the following reaction, 4.99 grams of chlorine gas are mixed with excess iron. The reaction yields 5.37 grams of iron(III) chloride. iron(s)+chlorine(g)→iron(III) chloride(s)iron(s)+chlorine(g)→iron(III)

Nicolas Dumazet asked Dec 27, 2024

by Nicolas Dumazet

8.4k points

1 answer

0 votes

126k views

A sample of argon gas occupies a volume of 6.86 L at 53.0 and 1.19 atm If it is desired to decrease the volume of the gas sample to 5.78 L, while increasing its pressure to 1.50 atm, the temperature of

Rendy Del Rosario asked Dec 27, 2024

by Rendy Del Rosario

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1 answer

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136k views

Which of the following methods would MOST effectively separate two volatile compounds? a. gas-liquid chromatography b. liquid-liquid extraction c. distillation d. recrystallization

Jack Armstrong asked Dec 27, 2024

by Jack Armstrong

7.6k points

1 answer

3 votes

155k views

During photosynthesis, the following reaction takes place: carbon dioxide + water + light energy → sugar + oxygen During cellular respiration, the following reaction takes place: sugar + oxygen → carbon

Ben Goodrich asked Dec 27, 2024

by Ben Goodrich

7.1k points

1 answer

0 votes

99.5k views

Name these compounds: NaF, BeI₂, K₂SO₄, CaO, H₂S, MgCO₃.

Upitau asked Dec 27, 2024

by Upitau

8.2k points

1 answer

1 vote

104k views

How much potassium bromide, in grams, should be added to water to prepare 0.50 L of solution with a molarity of 0.125 M?

Jason CHAN asked Dec 27, 2024

by Jason CHAN

8.1k points

1 answer

3 votes

213k views

In science what is acid

Zyberzero asked Dec 27, 2024

by Zyberzero

8.5k points

2 answers

3 votes

102k views

4.19. Equilibrium flash using a graph. A liquid containing 60 mol% toluene and 40 mol% benzene is continuously distilled in a single equilibrium stage at 1 atm. What percent of benzene in the feed leaves

Agold asked Dec 27, 2024

by Agold

8.1k points

1 answer

3 votes

102k views

When 16. 5 g of calcium carbonate react with an excess of hydrochloric acid, calcium chloride, carbon dioxide, and water vapor are produced. Write the equation. What is the theoretical yield of carbon

Egur asked Dec 27, 2024

by Egur

8.7k points

1 answer

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115k views

What does 'd: a heterogeneous mixture' represent in this context? Option 1: an element Option 2: a compound Option 3: a homogeneous mixture Option 4: a heterogeneous mixture

Pranay Kumar asked Dec 27, 2024

by Pranay Kumar

7.9k points

1 answer

4 votes

187k views

What is the concentration of a 200.0 mL solution that contains 1.00 g of NaCl? A. 0.00855 M B. 0.0855 M C. 0.855 M D. 8.55 M

Zed Blackbeard asked Dec 27, 2024

by Zed Blackbeard

8.4k points

1 answer

4 votes

34.0k views

A mixture of krypton and oxygen gas is compressed from a volume of 80.0 L to a volume of 62.0 L under a constant pressure of 24.0 atm, what is the work done on the gas mixture?

Jshen asked Dec 27, 2024

by Jshen

7.8k points

1 answer

4 votes

148k views

In ionic compounds which groups from the periodic table usually provide the anion? O Groups IA, IIA and IIIA O Groups VA, VIA, VIIA O Groups VIB, VIIB Groups of transition metals

Martin DeMello asked Dec 27, 2024

by Martin DeMello

7.9k points

1 answer

0 votes

126k views

are the electrons in the outermost principal shell (the principal shell with the highest principal quantum number, n)?

Delta asked Dec 27, 2024

by Delta

9.1k points

1 answer

5 votes

182k views

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