3 years ago

Someone help me pls ada

1 answer:

6 0

I think the answer for #3 is A not 100% sure but hope I can help!

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dezoksy [38]

Answer: There are five signs of chemical change

When these signs start to form you know chemical change is at work.

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4 years ago

Savatey [412]

Answer: 24.309amu

Explanation:

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3 years ago

Rom4ik [11]

Answer:

D. 18.7 grams

Explanation:

The coefficients are the key.

Create a proportion with them, and the molar mass, and then solve for x:

$\frac{2}{3} = \frac{x}{28} \\ 3x = 2(28) \\ 3x = 56 \\ x = 18.666... = 18.7$

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4 years ago

harina [27]

Hepta is seven and tetra is four, so option c is your answer

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4 years ago

marin [14]

I think the answer is D in my opinion

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3 years ago