3 years ago

Can anyone check my chemistry answers?

1 answer:

4 0

I check all of them. most of them correct but one

in question 6, the answer is the third choice. remember to find the neutrons, you take the atomic mass minus the atomic number. 38 - 18= 20

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If 3 g of element C combine with 8 g of element D to form compound CD, how many grams of D are needed to form compound CD2?

bija089 [108]

<span>For the answer to the question above,
If 3g of element combines with 8g of D to form CD it means
1 mole of C = 3g
1 mole of D = 8g
hence it forms CD.
So to form CD2 you need 16g of element D
I hope my answer helped you</span>

8 0

2 years ago

What elements on the periidic table are metalloids<br><br>

butalik [34]

Answer:

Boron (B)

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2 years ago

How can an impurity in a flame test affect the results?

MA_775_DIABLO [31]

Explanation:

If a sample is impure, it means it contains multiple substances, this means that when you test it in a flame test, it will come up with a mixed color meaning you wont be able to tell what ions are in the substance.

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3 years ago

In a 4.00 L pressure cooker, water is brought to a boil. If the final temperature is 115 °C at 3.10 atm, how many moles of steam

Olenka [21]

Answer: 0.39mol of the steam are in the cooker.

Explanation:Please see attachment for explanation

7 0

3 years ago

Someone plz help i need to do this assignment to pass the class

Natalija [7]

Answer:

1)0.2

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Explanation:

Formula is 1)454÷2270

2)0.6×1.2

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1 year ago