Recent questions in Chemistry

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Select the correct answer. Why are metals good conductors of heat and electricity? A. anions rotate around the stationary electrons B. cations rotate around the stationary electrons C. free moving atoms

Barend Gehrels asked Dec 27, 2023

by Barend Gehrels

2.8k points

1 answer

19 votes

166k views

Select the word that means how easily water can move through a substance. sediment porosity particles permeability

Rahim Dastar asked Dec 27, 2023

by Rahim Dastar

2.6k points

1 answer

4 votes

476k views

Write the skeleton equation for the reaction which occurs when a solution of silver nitrate reacts with copper metal to produce silver metal and copper (II) nitrate: You will need to include the state

Glacasa asked Dec 27, 2023

by Glacasa

2.7k points

1 answer

9 votes

461k views

6.5 grams of zinc reacted with hydrochloric acid. Calculate how many grams of hydrogen were released. a) 0.1 g. b) 0.2 g. c) 1.0 g. d) 2.0 g.

Mesutpiskin asked Dec 27, 2023

by Mesutpiskin

3.4k points

1 answer

8 votes

306k views

5 Select the correct answer. If a stone dropped into a well reaches the water's surface after 3.0 seconds, how far did the stone drop before hitting the water? ОА 1.4 meters OB. 44 meters Ос. 49 meters

Jeff Walker asked Dec 27, 2023

by Jeff Walker

2.4k points

1 answer

9 votes

211k views

In the diatomic molecule HCl, the H and the Cl share a pair of electrons. By doing so, the hydrogen atom attains the electron configuration of while chlorine attains the electron configuration of

Mmachine asked Dec 27, 2023

by Mmachine

2.8k points

1 answer

38 votes

103k views

Question 4 How many moles of CuSO4 are there in 7.87 x 1024 molecules of CuSO4?

Pixelknitter asked Dec 27, 2023

by Pixelknitter

2.7k points

1 answer

9 votes

49.9k views

Can you use melting point to determine the identity of an unknown solid? A piece of gray metal appears to be melting. The metal is observed to begin to melt when the temperature of its container is approximately

Kbunarjo asked Dec 27, 2023

by Kbunarjo

2.7k points

1 answer

25 votes

323k views

Write the half life of Uranium-238 as a standard number

Justin Grant asked Dec 27, 2023

by Justin Grant

2.7k points

1 answer

31 votes

451k views

Using the following equation 2C2H6 +7O2 -->4CO2 +6H2O if 19 g C2H6 react with 115 g O2, what is the limiting reactant?

Max Szczurek asked Dec 27, 2023

by Max Szczurek

2.7k points

1 answer

4 votes

422k views

Alpha Centauri IS star that is about the same size as the IS Sun. John is using tennis balls to model how the Sun and Alpha Centauri appear from Earth. He places one tennis ball one meter to his right

MysteryPancake asked Dec 27, 2023

by MysteryPancake

3.2k points

1 answer

24 votes

455k views

Question 7 of 10 What causes areas closer to the equator to have warmer air than areas farther away? OA. The indirect rays of the sun at the equator OB. The concentrated radiation from the sun at the equator

Aurum Aquila asked Dec 27, 2023

by Aurum Aquila

3.0k points

1 answer

28 votes

465k views

Which gas law should be used in the following problems: A sample of nitrogen (N2) has a volume of 50.0 L at a pressure of 760 mmHg. What is the volume of gas at a pressure of 1500 mmHg if there is no change

Sovannarith Cheav asked Dec 27, 2023

by Sovannarith Cheav

3.0k points

1 answer

19 votes

163k views

If the temperature of a 50mL sample of a gas is changed from 200K to 400K under constant pressure, what is the new volume of the gas?

Ietu asked Dec 27, 2023

by Ietu

3.1k points

1 answer

42 votes

150k views

The release of carbon dioxide into the atmosphere parallels the increase in global temperatures. Does this mean that the daily temperatures everywhere are increasing?

Pringles asked Dec 27, 2023

by Pringles

3.1k points

1 answer

21 votes

69.7k views

What is the difference between endothermic and exothermic reactions? How do they affect the enthalpy and the temperature of the system and the surroundings?

Thedjaney asked Dec 27, 2023

by Thedjaney

3.4k points

1 answer

20 votes

425k views

Which organelle allows cells to be motile?

MoatPylon asked Dec 27, 2023

by MoatPylon

2.8k points

1 answer

19 votes

368k views

Explain the various factors that impact the solubility of substances in water.

Chuan asked Dec 27, 2023

by Chuan

2.8k points

2 answers

26 votes

153 views

8. Which object has the greatest density? Explain.

Resul asked Dec 27, 2023

by Resul

2.7k points

1 answer

35 votes

321k views

I don't know this one, can someone help me please

MigMit asked Dec 27, 2023

by MigMit

2.8k points

1 answer

37 votes

41.6k views

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