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Contact [7]
3 years ago
9

Please help me to do this assignment

Chemistry
1 answer:
kirill [66]3 years ago
7 0

Answer:

1. Objective

2. Objective

3. Opinion

4. Objective

5. Opinion

6. Opinion

7. Opinion (I think.)

8. Opinion (I think.)

Explanation:

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How many moles are present in a 120.0g sample of calcium
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I THINK this is the answer: 4809.35999999786. (found it on a website)

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3 years ago
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Isº2s2p 3sº3p®45*3d"4p^5s*4d"5p<br> 6s4f5d"6p
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gibberish

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Which element easily loses one electron to form a positive ion? (AKS 1c/DOK 1)
Lena [83]

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Potassium

Explanation:

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3 years ago
What is the object called that burns as it enters the atmosphere and causes an shooting star?
nataly862011 [7]

Answer:

A meteor is an asteroid or other object that burns and vaporizes upon entry into the Earth's atmosphere; meteors are commonly known as "shooting stars." If a meteor survives the plunge through the atmosphere and lands on the surface, it's known as a meteorite.

Explanation:

7 0
3 years ago
What is the volume of 8.7 * 10 ^ 23 molecules of chlorine gas (Cl 2 ) ?
Mariana [72]

Answer:

32.3 dm³

Explanation:

Data given:

no. of molecules of Cl₂ = 8.7 x 10²³

Volume of chlorine gas (Cl₂) = ?

Solution:

First we have to find number of moles

For this formula used

    no. of moles = no. of molecules / Avogadros number

    no. of moles = 8.7 x 10²³ / 6.022 x 10²³

    no. of moles = 1.44 moles

Now we have to find volume of the gas

for this formula used

                      no. of moles = volume of gas / molar volume

molar volume = 22.4 dm³/mol

Put values in above equation

                 1.44 moles = volume of Cl₂ gas / 22.4 dm³/mol

rearrange the above equation

                 volume of Cl₂ gas = 1.44 moles x 22.4 dm³/mol

                volume of Cl₂ gas =  32.3 dm³

8 0
3 years ago
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