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Rasek [7]
3 years ago
6

How many water molecules are in a block of ice containing 1.50 mol of water (H2O)?

Chemistry
1 answer:
oksano4ka [1.4K]3 years ago
5 0
1.50 moles H20(6.02*10^23 molecules/1 mole)
9.03*10^23 molecules
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How much heat in Joules is needed for an increase in temperature by 12.5 degrees of an 8 gram block of gold
Vinil7 [7]

Answer: 13

Explanation:

Q=mc \Delta T\\\\Q=(8)(0.13)(12.5)\\\\Q=\boxed{13}

4 0
2 years ago
Want ate the five steps of the scientific method
pantera1 [17]

Answer:

make an observation is number one number two is ask a question number three is form a hypothesis number number five isa test the prediction.

6 0
3 years ago
The scale reads "16.121 grams", which number(s) is/are "estimated by the scale?
luda_lava [24]

Answer:

See explanation

Explanation:

There are different kinds of analytical balances that read the mass of objects weighed in them to one, two, three or four decimal places as the case may be.

Most common analytical balances read the mass of objects to two or three decimal places hence the last 1 after the decimal point are likely to be approximated.

Hence, the scale may read 16.12 as the case may be.

8 0
3 years ago
This is a physical combination of one substance dissolved in another.
FinnZ [79.3K]

Answer:

  • <u><em>Solution </em></u><em>is a physical combination of one substance dissolved in another.</em>

Explanation:

A <em>solution</em> is a homogeneous mixture.

The solutions are characterized by uniform composition and one phase, but they can be either solid, liquid or gases.

In a solution there is, at least, one solute <em>substance</em> and one or more solvents.

A typical solution is salt and water: salt is the solute, which is <em>dissolved</em>, in water (the solvent).

In a solution, you can not distinguish visually the solute from the solvent, but, since they are physically, and not chemically, combined, they can be separated by physical media, e.g. evaporation.

6 0
3 years ago
Read 2 more answers
How much thermal energy is needed to raise the temperature of 4g of water
BARSIC [14]

Answer:

837.2J

Explanation:

m=4g,c=4.186 J/g/C, change in temperature=75-25=50 degree Celsius Q=?

using the formula

Q=mxcx change in theta

Q=4x4.186x50

Q=837.2J

4 0
3 years ago
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