3 years ago

1. A 205 g sample of H20 at 25.0 °C is heated until the temperature reaches 75.0 °C. How many

Chemistry

1 answer:

Pachacha [2.7K]3 years ago

7 0

Answer:

i really dont know

Explanation:

byeeeeeeeeeeeee

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ipn [44]

I believe the answer is D

5 0

3 years ago

Solve for Va<br><br>MaVa=MbVb

PolarNik [594]

Answer:

Va = (MbVb)/Ma

Explanation:

Divide both sides by Ma and voila!

8 0

3 years ago

Tin has ten stable isotopes. The heaviest, 124Sn, makes up 5.80% of naturally occuring tin atoms. How many atoms of 124Sn are pr

matrenka [14]

The average atomic mass of Sn is 118.71 g/mol

the percentage of heaviest Sn is 5.80%

the given mass of Sn is 82g

The total moles of Sn will be = mass / atomic mass = 82/118.71=0.691

Total atoms of Sn in 82g = $6.023X10^{23}X0.691=4.16X10^{23}$

the percentage of heaviest Sn is 5.80%

So the total atoms of $Sn^{124}$ = 5.80% X $4.16X10^{23}$

Total atoms of $Sn^{124}$ = $2.41X10^{22}$ atoms

the mass of $Sn^{124}$ will be = $\frac{2.41X10^{22}X124}{6.023X10^{23}}=4.96g$

5 0

3 years ago

FREE POI NTS COME AND GET EM

ddd [48]

Answer:

thx

Explanation:

8 0

3 years ago

Calculate the amount of copper (in moles) in a 45.2 g pure copper sheet

tangare [24]

Answer:

0.712 mol

Explanation:

The easiest way to do this is to use a proportion.

1 mol of copper = 63.5 grams (check this using your periodic table).

x mol of copper = 45.2 grams

1/x = 63.5 / 45.2 Cross multiply

63.5 x = 1 * 45.2 Divide by 63.5

x = 45.2/63.5

x = 0.712 mol Answer to 3 sig digs

8 0

3 years ago