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jeka94
3 years ago
7

Which requires more heat to warm from 22 c to 85 c, 50.0 g of water mor 200. g of aluminum metal?

Chemistry
1 answer:
Yuki888 [10]3 years ago
7 0
Q=mc(change in temp)
Q is amount of heat, m is mass, c is specific heat

Water:
Q= (50.0g)(4.18 J/g°C)(63°C)
Q= 13167J

Aluminum:
Q= (200.0g)(0.900 J/g°C)(63°C)
Q= 11340J

Water requires more heat
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3 0
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Choose the molecule with the strongest internal bond, (intra-, not intermolecular bond) ​
Verdich [7]

Answer:

A

Explanation:

The molecule with the strongest intramolecular bond is HF. Hydrogen fluoride is the answer due to the strong and highly electronegative nature of Fluorine.

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6 0
3 years ago
Please answer both questions.
Deffense [45]

Answer:

1)Krypton

2)11H

Explanation:

electrons=protons

protons=atomic number

mass number=protons+neutrons

mass number is the superscript

atomic number is the subscript.

1)The answer is Krypton because its atomic number= number of protons=number of electrons is 36.

mass number is 46+36=82.

2)subscript=atomic number=number of protons=number of electrons

i. H = electrons=1

=neutrons=0

ii. Cl=electrons=17

=neutrons=35-17=18

iii. Na=electrons=11

=neutrons=23-11= 12

so the answer is Hydrogen because it has 1 electron and 0 neutron.

I hope this helps.

6 0
3 years ago
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Helga [31]

Answer:

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What defines an expression?

expression - An expression is a sentence with a minimum of two numbers and at least one math operation. This math operation can be addition, subtraction, multiplication, and division.

So if we look at the letter options we can see that A is the best choice.

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3 years ago
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