Chemistry High School

khan academy sucks. can someone answer this? :)

Khan Academy Sucks. Can Someone Answer This? :)

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Answer 1
Answer:

The answer is A. 80Se2-

Related Questions

__Is when water changes from a solid to a liquid

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melting

andnfndlzns d

When water changes from a solid to a liquid it is called melting.

Solid ice melts and forms into a liquid: water.

If this incorrect, please, don't refrain to tell me. Thank you.

Th picture shows a model of cell.
What is the main function of the part labeled z in the model?
A. To hold and protect the cell's DNA
B. To store food and other materials inside the cell
C. To use energy from sunlight to make sugars
D. To provide the cell with energy for its activities

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Answer:

The answer is the D. That's the Mitochondrion.

Explanation:

Isopropanol is a solvent that is liquid at room temperature. How would isopropanol behave when poured out of its container onto a table

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It will evaporate
It needed to be 20 characters ignore this

Which of the following is a neutralization reaction?

a
SiCl4 + 4 H2O → H4SiO4 + 4 HC

b
HCl + NaOH → NaCl + H2O

c
6 CO2 + 6 H2O → C6H12O6 + 6 O2

d
2Al + 6HCl → 2AlCl3 + 3H2

Answers

Answer:

B

Explanation:

B, Hcl + NaoH = NaCl + H2O

A particle of matter contains six protons seven neutrons and six electrons the particle must be

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carbon-13 or 12 i cannot remember

15POINTS

What is acceleration? O A. A change in speed B. A change in speed or direction O C. A change in force O D. A change in force or energy​

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A

acceleration is change in speed

Answer:

A. Change in speed

Joy mixes one cup of sugar and one cup of lemon juice into three cups of water. The solvent in this recipe is the?

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Answer: Water is the solvent in this recipe.

Explanation: A solvent is " a molecule that has the ability to dissolve other molecules". Lemon juice and sugar are solutes.

How many moles of copper are needed to react with sulfur to produce 0.25 moles of copper (i) sulfide according to the following reaction: 2 Cu + S = Cu2S

Answers

Answer:

0.5 mole

Explanation:

The equation for the reaction is given below:

2Cu + S —> Cu2S

We can calculate the mole of copper (Cu) needed to react with sulphur (S) to produce 0.25 mole of copper(I) sulfide (Cu2S) by doing the following:

From the balanced equation above,

2 moles of Cu reacted to produced 1 mole of Cu2S.

Therefore, Xmol of Cu will react to produce 0.25 mole of Cu2S i.e

Xmol of Cu = 2 x 0.25 = 0.5 mole

Therefore, 0.5 mole of copper (Cu) will react with sulphur (S) to produce 0.25 mole of copper(i)sulfide (Cu2S)

Helllppp meee!! Please

Answers

I believe it’s C I might be wrong

Answer:

a bus moves on a straight road then makes a right turn

Explanation:

yes


If you had a bottle that contained 5.69x1024 molecules of water, how many
moles of water does the bottle hold? Please show the solution :))

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Yeah what the other person said ^

why do we use anticides​

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Antacids neutralise the acid made by your stomach. They are commonly used in conditions where it is helpful to neutralise the acid made in the stomach. For example, for acid reflux which causes heartburn. Most people who take antacids do not develop any side-effects.

Answer:

If you mean antacids (bases) it to neutralise stomach acids that have been disturbed.

Explanation:

Other Questions
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In Holborn School there are460 students in Key Stage 3320 students in Key Stage 4165 students in Key Stage 5Nimer is carrying out a survey.He needs a sample of 100 students stratified by Key Stage.Work out the number of students from Key Stage 3 there should be in the sample.(2 marks)studentsSubmit AnswerSkip for Now Please help me with this :) How does a balance of power among nations help keep peace?Its alliances prevent one country from dominating the othersIt ensures that the smallest nations have the most soldiers.It ensures that the biggest nations have the most weaponsIt allows a small nation to be stronger than a larger nation At December 31, 2021, Moonlight Bay Resorts had the following deferred income tax items: Deferred tax asset of $58 million related to a current liability Deferred tax asset of $38 million related to a noncurrent liability Deferred tax liability of $124 million related to a noncurrent asset Deferred tax liability of $76 million related to a current asset Moonlight Bay should report in its December 31, 2021, balance sheet a: Multiple Choice Noncurrent deferred tax liability of $104 million. 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