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3 years ago

What happens to water when it changes to ice

Chemistry

1 answer:

irina [24]3 years ago

8 0

Answer:The atoms cool down and become slower and their bonds become close and they move less.

Explanation:I took science

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A compound contain only carbon, Hydrogen, Oxygen. Mass percentage of carbon is 52.2%, relative molecular mass of compound is 46,

Anon25 [30]

Answer:

Six

Explanation:

Mᵣ = 46

Aᵣ(C) = 0.522 × 46 = 24

Difference = 22

Less 1 O = -16

Aᵣ(H) = 6

The relative atomic mass of the H atoms is 6.

The molecule contains six hydrogen atoms.

7 0

3 years ago

Veseljchak [2.6K]

Answer:

m = 1538.5 g

Explanation:

To answer this question, use the equation for specific heat:

$q=mc \Delta T$

Where q is the total heat energy, m is the mass, c is the specific heat of the substance (in this case water), and delta T is the temperature change.

You will be expected to know the specific heat of water, which is 4.186 J/g/C. Using the information in the question:

$41840=m(4.186)(28.5-22)\\41840=27.2m\\m=1538.2$

The final answer, 1538.5 g, is closest.

7 0

3 years ago

My Plate recommends that ______ of your nutritional intake comes from fruits and vegetables.

mylen [45]

30 % of vegetables and 20% of fruits

So B) 50%

3 0

3 years ago

Read 2 more answers

HELPPPP PLEASE ASAP!!!

irina [24]

Answer:

230
Th
90

Explanation:

The left side shows the element uranium with mass number 234 (superscript to the left of ths symbol) and atomic mass 92 (subscript to the left of the symbol).

So, you have to find the mass number and atomic numbers missing on the right side which added to those shown for the helium atom reach 234 and 92.

This the the mathematics:

1) Mass number of U - mass number of He = 234 - 4 = 230 ⇒ the mass number of the missing element is 230.

2) atomic number of U - atomic number of He = 92 - 2 = 90 ⇒ the atomic number of the missing element is 90.

Now, you use the atomic mass to identify the element. You do it by simply searching in a periodic table. There you find that the atomic number 90 corresponds to thorium, whose symbol is Th.

Now you have that the product that completes the right side of the decay equation is:

230
Th
90

4 0

3 years ago

As a result of the transfer of an electron from a less electronegative atom to a more electronegative atom,

Viktor [21]

Answer: The correct answer is Option d.

Explanation:

Electronegativity is defined as the tendency of an element to attract the shared pair of electron towards itself in a compound.

When electron is transferred from less electronegative atom to more electronegative atom.

The atom which is more electronegative gains electron and undergoes reduction reaction.

Reduction reaction is defined as the reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

$X^{n+}+ne^-\rightarrow X$

During the transfer of electrons, energy is released when an electron looses is potential energy during the transfer.

Hence, the correct answer is Option d.

4 0

3 years ago