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3 years ago

MULTIPLE CHOICE QUESTION

Chemistry

2 answers:

german3 years ago

8 0

Answer:

radiation

Explanation:

USPshnik [31]3 years ago

8 0

Either radiation or convection and radiation

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85 POINTS!!

Gelneren [198K]

Answer:

It says in the question its up to you to decide, so you have to graph the weather changes then explain why you graphed it in that way.

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4 years ago

How many atoms of phosphorus are in 7.00 mol of copper(II) phosphate?

Rama09 [41]

<u>Answer:</u> The number of phosphorus atoms in given amount of copper(II) phosphate is $8.431\times 10^{24}$

<u>Explanation:</u>

We are given:

Moles of copper(II) phosphate $Cu_3(PO_4)_2$ = 7.00 mol

1 mole of copper(II) phosphate contains 3 moles of copper, 2 moles of phosphorus and 8 moles of oxygen atoms

Moles of phosphorus in copper(II) phosphate = $(2\times 7.00mol$

According to the mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of particles

So, 7.00 moles of copper(II) phosphate will contain = $(2\times 7\times 6.022\times 10^{23}=8.431\times 10^{24}$ number of phosphorus atoms.

Hence, the number of phosphorus atoms in given amount of copper(II) phosphate is $8.431\times 10^{24}$

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3 years ago

Question: Laundry in a clothing dryer often become charged with static electricity while drying. Which of these best explains wh

zavuch27 [327]

The answer to this question will be D

7 0

3 years ago

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Mercury melts at 234.3 k. Convert this this melting point to degrees celcius

DerKrebs [107]

Answer:

2069.85°C

Explanation:

0 K − 273.15 = -273.1 °C

Then,

234 K − 273.15 = 2069.85 °C

Best regards

3 0

4 years ago

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Are two atoms of the same element identical? pls answer asap need long definition

RoseWind [281]

Atoms of the same chemical element do not always have the same mass because, although the number of protons in the nucleus is the same for all atoms of the same element, the number of neutrons is not. Most elements as they occur naturally on earth are mixtures of several isotopes

hope this will help

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3 years ago