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Zigmanuir [339]
3 years ago
15

Why is it not possible to directly count the number of particles in a mole?

Chemistry
1 answer:
SVETLANKA909090 [29]3 years ago
6 0

Answer: because a mole is based on Avogrado's number,  which is 6.02 x 10²³ particles. It isn't possible to directly count that many particles at a time.

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Solve and round to the correct number of significant figures: 129 ÷ 29.20
Scilla [17]

4.42

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So you round to the significant figure which in this case is 2 decimal places because 29.20 has 2 decimal places.

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5 0
3 years ago
I charged atom is called a _____.<br><br> Proton<br> Electrolyte<br> Isotope<br> Ion
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1 charged atom is called a Proton

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Shkiper50 [21]
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4 0
3 years ago
if .709 j of heat is added to water and cause the temperature to go up by .036 degrees C what mass of water is present
liberstina [14]

Answer:

0.00471 grams H₂O

Explanation:

To determine the mass, you need to use the following equation:

Q = mcΔT

In this equation,

-----> Q = energy/heat (J)

-----> m = mass (g)

-----> c = specific heat capacity (J/g°C)

-----> ΔT = temperature change (°C)

The specific heat capacity of water is 4182 J/g°C. You can plug the given values into the equation and simplify to isolate "c".

Q = 0.709 J                            c = 4182 J/g°C

m = ? g                                   ΔT = 0.036 °C

Q = mcΔT                                                    <----- Equation

0.709 J = m(4182 J/g°C)(0.036 °C)            <----- Insert values

0.709 J = m(150.552)                                 <----- Multiply 4182 and 0.036

0.00471 = m                                              <----- Divide both sides by 150.552

8 0
1 year ago
How can we find the volume of this fish tank? Please I needed but Good
lawyer [7]
Volume well in the picture the fish tank seems to be a rectangle, so you would do V=length x width x height. So V=5x3x3=45
3 0
3 years ago
Read 2 more answers
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