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2 years ago

USE YOUR OWN WORDS. Each question must have a three sentence long answer!

Chemistry

2 answers:

Furkat [3]2 years ago

8 0

Answer:

<em>YOU</em> use <em>YOUR OWN WORDS</em>

Explanation:

Have a good day! :)

Naily [24]2 years ago

5 0

Although many have taken science classes throughout the course of their studies, people often have incorrect or misleading ideas about some of the most important and basic principles in science. Most students have heard of hypotheses, theories, and laws, but what do these terms really mean? Prior to reading this section, consider what you have learned about these terms before. What do these terms mean to you? What do you read that contradicts or supports what you thought! So 2

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Is the mold on bread made up of cells

Harman [31]

Answer:

Yes.

Explanation:

Mold is a living organism. All living organisms are made up of cells.

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3 years ago

Water can be formed from the synthesis reaction of hydrogen with oxygen<br><br> PLEASE HELP

Anestetic [448]

Answer:

1.4 mols

4th answer

Explanation:

22. 5 g of O2 in moles = (22.5/32) mols = 0.703 mol

The stoichiometry between O2 and H2O =1: 2

Therefore H2O produced = 2 * 0.703 mols=1.406 mols

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3 years ago

HELP ASAP 20 OR MORE POINTS!!!!

pishuonlain [190]

<h2>YeS im Am fRom pLanet k12 And brinG anD imPortant MesSage </h2>

The answer to your question is, <u><em>There are only so many ways matter can arrange itself within that infinite universe.</em></u>

<h2><em>Also if your on the same test as me heres some other sTuff that was on my test </em></h2><h2><em> </em></h2>

Question 1 (1 point)

In Brian Greene's "A Physicist Explains Why Parallel Universes May Exist", what reason does Greene give for why he believes parallel universes may exist?

<em>Answer: There are only so many ways matter can arrange itself within that infinite universe.</em>

<em> </em>

Question 2 (1 point)

Choose the best explanation for why we experience the Mandela Effect.

<em>Answer: Our brains tend to fill in information that we cannot readily recall and make associations that are not true.</em>

Question 3 (1 point)

From the article "Time Travel Is A Fun Science Fiction Story But Could It Be Real?", Albert Einstein's Theory of Relativity is described as what?

<em>Answer: The pulling force of gravity causes space to curve and causes time to slow down.</em>

Question 4 (1 point)

From the video " Are Wormholes The Answer To Time Travel?", how are worm holes described?

<em>Answer: A tunnel in space connecting two regions very distant from each other. A "short cut" through space</em>

Question 5 (1 point)

Many scientists think human cloning is possible, so why haven't we made human clones yet?

<em>Answer: Human cloning is extremely controversial and many people believe it is unethical</em>

<h2><em>HOPE THIS HELPS ANYONE IF IT DOES THANK AND RATE FOR A FREE COOKIE :D </em></h2>

6 0

3 years ago

Read 2 more answers

A saturated solution of manganese(II) hydroxide was prepared, and an acid–base titration was performed to determine its KspKsp a

trapecia [35]

Answer:

10.945 x 10^-4

Explanation:

Balanced equation:

Mn(OH)2 + 2 HCl --> MnCl2 + H2O

it takes 2 moles HCL for each mole Mn(OH)2

Next find the molarity of the Mn(OH)2 solution

= (1 mole Mn(OH)2 / 2 mole HCl) X (0.0020 mole HCl / 1000ml) X (4.86 ml)

= 4.86 x 10^-3 mole

this is now dissolved in (70 + 4.86) = 74.86 ml or 0.07486 L

thus [Mn(OH)2] = 4.86 x 10^-3 mole / 0.07486 L = 0.064921 M

Ksp = [Mn2+][OH-]^2 = 4x^3 = 4(0.064921)^3 = 10.945 x 10^-4

6 0

3 years ago

2Li + H2SO4=Li2SO4 + H2 How many liters of hydrogen gas, H2 at STP can be produced from 3.0 moles of Li? The molar volume of a g

Gemiola [76]

Answer:

volume of $H_2=33.6 litre$

Explanation:

Firstly balance the given chemical equation,

$2Li + H_2SO_4=Li_2SO_4 + H_2$

From the given balance equation it is clearly that,

2 mole of Li gives 1 mole of H2 gas

$2 mole Li$ ⇔ $1 mole H_2$

$1 mole Li$ ⇔ $0.5 mole H_2$

$3 mole Li$ ⇔ $1.5 mole H_2$

hence

3 mole of Li will give 1.5 mole H2 gas

therefore volume of gas produced from 3 mole Li at $STP = 1.5\times22.4 \frac{L}{mol}$

volume of H2=33.6 litre

7 0

3 years ago