Recent questions in Chemistry

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Write the differences between external and internal fertilization.

TomoJ asked Oct 6, 2024

by TomoJ

9.7k points

1 answer

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166k views

The energy to separate fragments during agarose gel electrophoresis is supplied by? 1) gravity 2) active transport 3) agarosis 4) electricity

Nitinvertigo asked Oct 6, 2024

by Nitinvertigo

8.4k points

1 answer

5 votes

2.3k views

The density of silver is 10.49 g/ml.. What is the volume of a 9.43-kg sample?

Lubos Hasko asked Oct 6, 2024

by Lubos Hasko

7.8k points

1 answer

2 votes

145k views

What are the glycosidic linkages that are formed in the three disaccharides? A. α-1,4-glycosidic linkage. B. β-1,4-glycosidic linkage. C. α-1,2-glycosidic linkage. D. β-1,2-glycosidic linkage.

Byorn asked Oct 6, 2024

by Byorn

8.3k points

1 answer

3 votes

121k views

Aqueous solutions of sulfuric acid and barium chloride are mixed to produce a precipitate of barium sulfate and aqueous solution of nitrous acid : True/ False

Tommy Lacroix asked Oct 6, 2024

by Tommy Lacroix

9.0k points

1 answer

4 votes

55.8k views

Mg^- Lewis structure

Kcent asked Oct 6, 2024

by Kcent

8.0k points

1 answer

5 votes

202k views

True or False Topical fluoride should be applied immediately before sealant procedure.

Spiderix asked Oct 6, 2024

by Spiderix

8.7k points

1 answer

1 vote

134k views

In a titration of cyanide ion, 28.72 mL of 0.0100 M AgNO₃ is added before precipitation begins. [The reaction of Ag+ with CN– goes to completion, producing the Ag(CN)₂− complex.] Precipitation of solid

Chrysn asked Oct 6, 2024

by Chrysn

8.1k points

1 answer

5 votes

226k views

Identify which of the following are acid-base reactions. Select all that apply. 1) NaOH(aq) + HClO₄(aq) → NaClO₄(aq) + H₂O(l) 2) HCOOH(aq) + NaOH(aq) → HCOONa(aq) + H₂O(l) 3) Fe₃⁺(aq) + 3 Ag(s) → 3 Ag(aq)

Liu Dongyu asked Oct 6, 2024

by Liu Dongyu

7.5k points

1 answer

0 votes

201k views

Mercury can be obtained by reacting mercury(II) sulfide with calcium oxide. How many grams of calcium oxide are needed to produce 36.0 g of Hg? 4 HgS(s) + 4 CaO(s) → 4 Hg(l) + 3 CaS(s) + CaSO4

MikkoP asked Oct 6, 2024

by MikkoP

7.2k points

1 answer

0 votes

203k views

What is the O2 requirement for cabin pressure altitudes above 15,000 ft A) Oxygen required for the entire flight B) Oxygen required for the crew only C) Oxygen required for passengers and crew D) No oxygen

Malay asked Oct 6, 2024

by Malay

8.1k points

1 answer

5 votes

160k views

How many oxygen atoms are there in 2 formula units of Al2(SO3)3? A) 18 B) 24 C) 36 D) 48

InControl asked Oct 6, 2024

by InControl

8.2k points

1 answer

4 votes

122k views

A solution contains 600.0 g of Barium Sulfate BaSO4, a electrolyte dissolved in 345 g of water. What is the boiling point of the solution?

Cara asked Oct 6, 2024

by Cara

8.8k points

1 answer

3 votes

141k views

What is the wavelength of a radio wave that has a frequency of 3.75x10⁷ hz

Finswimmer asked Oct 6, 2024

by Finswimmer

8.1k points

1 answer

0 votes

193k views

Which document is required by OSHA to provide guidelines regarding the handling and storage of chemicals? 1) Material Safety Data Sheet (MSDS) 2) Safety Data Sheet (SDS) 3) Chemical Handling and Storage

Jan Van Looveren asked Oct 6, 2024

by Jan Van Looveren

7.7k points

1 answer

1 vote

62.7k views

What is a vapor? A. A substance that is in the gas phase at a temperature at which it would normally be a solid or liquid B. A substance that has a much higher melting point and boiling point than other

Andrew Barrett asked Oct 6, 2024

by Andrew Barrett

8.2k points

2 answers

5 votes

108k views

9) The AH for the reaction of magnesium with hydrochloric acid is -4.62 × 105 J/mol. 1f 0.158 g of Mg reacts in 100.0 mL of solution (the volume includes magnesium) in a coffee-eup calorimeter, the temperature

SpkingR asked Oct 6, 2024

by SpkingR

8.2k points

1 answer

5 votes

72.9k views

Assume that Q, T. X, and Z are symbols for elements. Possible answers: (a) decomposition, (b) double-replacement, (c) single-replacement, or (d) synthesis Equation: QT----> Q + T

The Dark asked Oct 6, 2024

by The Dark

8.7k points

1 answer

4 votes

215k views

Calculate the mass (in grams) of magnesium metal needed to produce 29.0 ml of hydrogen gas at an atmospheric pressure of 739 mmhg and a temperature of 25.9°c.

Daxsorbito asked Oct 6, 2024

by Daxsorbito

8.8k points

1 answer

3 votes

223k views

Summarize the progression of thought about motion from the time of the ancient Greeks to modern times

Raymond Reddington asked Oct 6, 2024

by Raymond Reddington

8.5k points

1 answer

4 votes

92.2k views

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