Recent questions in Chemistry

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Zinc reacts with Hydrochloric Acid in a single replacement reaction. If you have 8 g of of zinc metal, what mass of each product would you produce?

Reznor asked Oct 7, 2024

by Reznor

8.3k points

1 answer

2 votes

35.0k views

A gas with a volume of 650 mL and a pressure of 680 mm Hg is allowed to expand to a volume of 1200 mL. What is the new pressure of the gas in mm Hg?

PSSGCSim asked Oct 7, 2024

by PSSGCSim

8.7k points

1 answer

1 vote

142k views

Consider the following reaction at equilibrium. What effect will increasing the volume of the reaction mixture have on the system? 2 H₂S(g) + 3 O₂(g) A. The equilibrium constant will increase. B. The reaction

Pow asked Oct 7, 2024

by Pow

8.5k points

1 answer

5 votes

63.8k views

Reactivity is a chemical property of matter because... A. reactivity is changed by the amount of substance. B. reactivity is an extensive property. C. reactivity cannot be observed without changing the

Wouter Coebergh asked Oct 7, 2024

by Wouter Coebergh

8.2k points

1 answer

1 vote

192k views

Uranium has three common isotopes 234u 235u and 238u. 234u isotope has an atomic mass of 234.0409 amu and an abundance of .00541. 235u isotope has an atomic mass of 235.0439 amu and an abundance of .7204%.

Peter Wateber asked Oct 7, 2024

by Peter Wateber

7.8k points

1 answer

0 votes

23.8k views

How long did the BEC hold together? A. forever B. two thousand days C. a billionth of a second D. ten seconds

Dabs asked Oct 7, 2024

by Dabs

8.2k points

1 answer

2 votes

15.1k views

Which atom has the strongest attraction for valence electrons a) Al b) Si c) P d) S

Doug Bradshaw asked Oct 7, 2024

by Doug Bradshaw

7.8k points

1 answer

5 votes

229k views

Which of the following protocols works at the LOWEST layer of the OSI model? a.L2TP b.PPTP c.ISAKMP d.IPSec

RussHWolf asked Oct 7, 2024

by RussHWolf

7.2k points

1 answer

1 vote

12.8k views

In order to maintain effective lab practices, one must go through what? 1) Safety guidelines 2) Lab protocols 3) Experiment procedures 4) All of the above

Simonwjackson asked Oct 7, 2024

by Simonwjackson

8.1k points

1 answer

4 votes

668 views

If something has .15 moles of carbon and .60 moles of hydrogen what is the empirical formula

DannyTree asked Oct 7, 2024

by DannyTree

8.4k points

1 answer

0 votes

213k views

Which of the following are examples of chemokines? A) IL-8 B) CXCL-1 C) CXCL-2 D) TNF-α

Michael Hutter asked Oct 7, 2024

by Michael Hutter

8.2k points

1 answer

4 votes

221k views

What volume of ethanol is present in 50.0 mL of 10.2% (v/v) aqueous solution? a. 5.10 mL b. 4.90 mL c. 10.2 mL d. 2.55 mL

Vitalie asked Oct 7, 2024

by Vitalie

8.6k points

1 answer

4 votes

92.7k views

If a 10.0 L confined gas at 300 K is compressed to 5.0 L, then determine the final temperature of the gas as pressure is held constant.

Derek Illchuk asked Oct 7, 2024

by Derek Illchuk

8.9k points

1 answer

5 votes

158k views

What is the equilibrium constant Kc for the chemical reaction between sulfur dioxide and oxygen to produce sulfur trioxide at 550°C, with a known Kc value of 53? A) Kc = 53 B) Kc > 53 C) Kc < 53 D) The equilibrium constant cannot be determined from the given information.

Rolf Kristensen asked Oct 7, 2024

by Rolf Kristensen

8.3k points

1 answer

2 votes

181k views

When CH₄ is burned in plentiful air, the products are? 1) C + H₂ 2) CH₂ + H₂O 3) CO₂ + H₂ 4) CO₂ + H₂O

Ben Karel asked Oct 7, 2024

by Ben Karel

8.6k points

1 answer

0 votes

172k views

For the reaction C + 2H2 → CH4, how many grams of carbon are required to produce 7.8 moles of methane, CH4 ? Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer

Lasse Meyer asked Oct 7, 2024

by Lasse Meyer

8.0k points

1 answer

4 votes

136k views

Mica group: K(Mg, Fe)3 (Al Fe) Si3O10(OH)2 a.muscovite b.chlorite c.kyanite d.biotite

Sibyl asked Oct 7, 2024

by Sibyl

9.3k points

1 answer

5 votes

151k views

A mystery element of Q is a nonlustrous solid and a poor conductor of electricity. Name the element.

Bagbyte asked Oct 7, 2024

by Bagbyte

7.4k points

1 answer

3 votes

113k views

In β-oxidation, 2 carbon fragments are successively removed from the ___ end of the catty acyl coA producing ___, ___ and ___.

Roman Khimov asked Oct 7, 2024

by Roman Khimov

8.4k points

1 answer

4 votes

220k views

True or False: Write True if the statement is correct and False, if not. ____________ 1. Most of our intertidal zones and estuaries are already under threat. ____________ 2. The use of synthetic fertilizers

Nechelle asked Oct 7, 2024

by Nechelle

7.2k points

1 answer

2 votes

215k views

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