2 years ago

A molecule composed of atoms is called _________.

Chemistry

2 answers:

Gelneren [198K]2 years ago

8 0

I think it's element?

Readme [11.4K]2 years ago

3 0

I believe that the answer is element

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How many times more hydroxide ions are there in a solution with a ph of 9 than in a solution with a ph of 3?

cestrela7 [59]

The pH unit has 10x as many hydrogens ions as the unit above.
Ex: A pH of 5 would have 10x more hydrogen ions than a pH of 6
and 100x more than if it had a pH of 7.
With a pH of 9 and 3, this is equivalent to 10⁶
So your answer should be:
1,000,000

4 0

3 years ago

At a certain temperature the rate of this reaction is first order in SO₃ with a rate constant of 0.208 s⁻¹:

NNADVOKAT [17]

Answer:

0.30 M

Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t = ?

$[A_0]$ is the initial concentration = 1.36 M

k is the rate constant = 0.208 s⁻¹

t = 7.30 seconds

So,

$[A_t]=1.36\times e^{-0.208\times 7.30}\ M=0.30\ M$

8 0

2 years ago

43 mg = [?]g <br>A. 0.043 g <br>B. 4.3 g <br>C. 4300 g <br>D. 43,000 g

Ymorist [56]

Answer:

Option A (0.043 g) is the correct answer.

Explanation:

Given:

= 43 mg

As we know,

$1 \ mg = \frac{1}{1000} \ g$

then,

⇒ $43 \ mg = \frac{43}{1000} \ g$

$= 0.043 \ g$

Thus, the above is the correct alternative.

4 0

2 years ago

365,000,000 scientific notation

bekas [8.4K]

3.65 X 10 to the power of 8

6 0

2 years ago

Help ASAP PLEASE !!!!!!

expeople1 [14]

The answer would be B. Increased fertility downstream. Hope this helps. It's been a while since iv'e done the test, but I think this is the correct answer.

4 0

2 years ago