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3 years ago

What is 10% of 70 so I kmow

Chemistry

2 answers:

vaieri [72.5K]3 years ago

7 0

10 x 70 = 100 x Part, or

700 = 100 x Part

Now, divide by 100 and get the answer:

Part = 700 / 100 = 7

azamat3 years ago

7 0

70 x 10/100
=7 x 1
=7

Hope this helped!

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How many Joules are released to cool 250.0 grams of liquid water from 100°C to 0°C? The specific heat of water is 4.180 J/g.C.

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$\bold{\huge{\orange{\underline{ Solution}}}}$

$\bold{\underline{ Given :- }}$

We have 250g of liquid water and it needs to be cool at temperature from 100° C to 0° C
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$\bold{\underline{ To \: Find :- }}$

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$\bold{\underline{ Let's \:Begin:- }}$

We know that,

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That is, 

$\sf{\red{ Q = mcΔT }}$

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$\sf{ Q = 250 × 4.180 ×(0 - 100 )}$

$\sf{ Q = 250 × 4.180 × - 100 }$

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$\bold{\underline{ Now :- }}$

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