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just olya [345]
3 years ago
8

Why does a hot water bottle feel warm? Options: Molecules in the hot water bottle are moving faster than molecules in the skin.

Molecules in the skin are moving faster than molecules in the hot water bottle.
Chemistry
2 answers:
marissa [1.9K]3 years ago
7 0

Answer:

Molecules in the hot water bottle are moving faster than the molecules of the skin.

Explanation:

When an object is heated, the molecules of that object move much faster than the room temperature object or a cold object. When the molecules move faster, the friction causes heat.

vova2212 [387]3 years ago
5 0

Answer:

the answer is none of the above the answer is that if w should pour the hot water in a bottle the heat will make molecules combine together that is what brought about heat

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In general for main-group elements, atomic size _____ from left to right across a period and _____ down a group.
liberstina [14]

Answer:

decreases, increases

Explanation:

In general for main-group elements atomic size decreases from left to right across a period and increases down a group

8 0
1 year ago
Calculate the concentration of clo2− at equilibrium if the initial concentration of hclo2 is 2. 25×10^−2 m.
jek_recluse [69]

The concentration of ClO₂⁻ at equilibrium if the initial concentration of  HClO₂ is 0.0654.

<h3>What is concentration?</h3>

The concentration of any substance is the quantity of that substance in per square of the space or container.

The reaction is

HClO₂ + H₂O <=> H₃O⁺ + ClO₂⁻

The pH is 0.454 M

Ka = [H₃O⁺][ClO₂⁻ ] / [HClO₂]

2. 25 × 10⁻² m = [x][x] / 0.454-x]

2 + 0.011 - 0.004994 = 0

solve the quadratic equation

x = 0.0654 = [H3O+] = [ClO2-]

pH = -log (H3O+)

pH = -log(0.0654)

pH = 1.2

equilibrium concentrations of

[HClO2] = 0.454 -x = 0.454 -0.0654 = 0.3886 M

[ClO2- ] = x = 0.0654

Thus, the equilibrium concentrations  is 0.0654.

To learn more about concentration, refer to the link:

brainly.com/question/16645766

#SPJ4

6 0
1 year ago
Which organisms in soil helps relieve element so they can be recycled
Rudiy27

Answer:

Bacteria are also involved in many processes that are indispensable for our life on Earth. Many of these processes have to do with the recycling (reuse) of chemical elements that have been here since the formation of the planet

Explanation:

I hope it will help you

3 0
3 years ago
How many moles are in 3.00x 10^22 atoms of He?
sp2606 [1]

Answer:

<h2>0.05 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{3.0 \times  {10}^{22} }{6.02 \times  {10}^{23} }  \\  = 0.049833...

We have the final answer as

<h3>0.05 moles</h3>

Hope this helps you

3 0
3 years ago
Is the equation balanced or unbalanced? Explain. AI + O2 --&gt; AI2O3
anastassius [24]

Answer:

unbalanced..........

6 0
2 years ago
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