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3 years ago

Answer these and whoever has best answer get brainlist

Chemistry

1 answer:

monitta3 years ago

8 0

<h2>1.CHEMICAL ENERGY</h2>

WATER
SOIL

THEY HAVE CHEMICAL ENERGY

<h2>2.BECAUSE IT PROTECTS PLANT</h2><h3>EXPLENATION</h3>

Coal-fired plants produce electricity by burning coal in a boiler to produce steam. The steam produced, under tremendous pressure, flows into a turbine, which spins a generator to create electricity. The steam is then cooled, condensed back into water and returned to the boiler to start the process over.

$\huge\colorbox{red}{HOPE ITS HELP}$

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Chemistry

sukhopar [10]

Answer:

11.442E23molecules

Explanation:

Given data:

Number of moles of water = 1.9 mol

Number of molecules of water = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

In 1.9 moles:

1.9 mol × 6.022 × 10²³ molecules / 1 mol

11.442 × 10²³ molecules

In e notation:

11.442E23 molecules

6 0

3 years ago

Solve: Turn off Show summary. Use the Choose reaction drop down menu to see other equations, and balance them. Check your answer

suter [353]

Answer: See below

Explanation:

To balance equations, you want to have the same amount of elements on the product and reactants side.

__Al+ __HCl→__AlCl₃+ __H₂

We see that there are 3 Cl on the products side and 1 on the reactants side, but there are 2 H on the product and 1 on reactant. To fulfill them both, let's put a 6 at HCl.

__Al+ 6HCl→__AlCl₃+ __H₂

Now that we have a 6 at HCl, we can fill in AlCl₃ and H₂.

__Al+ 6HCl→ 2AlCl₃+ 3H₂

All we have left is to fill in Al.

2Al+ 6HCl→ 2AlCl₃+ 3H₂

-----------------------------------------------------------------------------------------------------------------

__NaCl→ __Na+ __Cl₂

Since we have 2 Cl on the products, we must put 2 on the reactants.

2NaCl→ __Na+ 1Cl₂

With 2 NaCl, we can fill in Na.

2NaCl→ 2Na+ 1Cl₂

-----------------------------------------------------------------------------------------------------------------

__Na₂S+ __HCl→ __NaCl+ __H₂S

We see 2 Na on reactants, so we can put 2 on the products.

__Na₂S+ __HCl→ 2NaCl+ __H₂S

With 2 H and 2 Cl on the products, we can put a 2 at HCl.

1Na₂S+ 2HCl→ 2NaCl+ 1H₂S

7 0

3 years ago

What is the molarity of a solution that has 0.030 mil of NaCl dissolved in 1.2 L solution?

aliina [53]

Answer:

"Well, by definition,

molarity=

<u>moles of solute </u>

volume of solution"

Explanation:

THE LINES UNDER <u>moles of solute </u>MEANS ITS OVER volume of solution"

I THINK IM RIGHT PLZ NOT HATE ON ME IF IN WRONG

7 0

4 years ago

BONUS QUESTION - It takes 194 mL of a 0.5 M NaOH solution to neutralize 300

Strike441 [17]

Answer:

1.7 mol/dm3

Explanation:

working out in the image

6 0

3 years ago

A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tar

bearhunter [10]

Answer: B

Explaination: The liquid solution changed color means is turned into a different substance with different properties. It is chemical change .

5 0

3 years ago

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