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kramer
3 years ago
15

Chromium has three naturally-occurring isotopes. It is 80% Chromium-52, 14% Chromium-53, and 6% Chromium-51. What is the average

atomic mass?
Chemistry
1 answer:
katrin2010 [14]3 years ago
5 0

Answer:

20

Explanation:

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Which of the following lists the types of single substances? (Select only one answer)
bogdanovich [222]

Answer:

I think it might be elements and compounds! I may be wrong though.

5 0
3 years ago
If the SN2 reaction of an aromatic alcohol with an alkyl halide, like the synthesis of nerolin, is successful, what changes woul
bixtya [17]

Answer:

<u>O-H stretch signal at 3300 cm-1</u>

Explanation:

In this question, we can start with the <u>reaction mechanism</u> for the synthesis of Nerolin. We have to start with naphthalen-2-ol adding NaOH we can produce the alkoxide. Then this alkoxide can react by an <u>Sn2 reaction</u> with bromomethane to produce Nerolin (see figure 1).

In the starting molecule (naphthalen-2-ol) we have an <u>"OH" group</u>. Therefore we will have an <u>O-H stretch signal</u> around 3300 cm^-1. The alcohol signals are very broad and very intense, so this will be the main signal for the initial molecule. In the final product, we dont have the "OH" therefore this signal will disappear (see figure 2).

I hope it helps!

7 0
4 years ago
Given the statements below, choose the one that is true about one-celled living things.
grandymaker [24]

Answer: The adult stage for one-celled organisms is usually extremely long.

Explanation:

The first one is false, I'm no expert, but I'm pretty sure that there is some yeast that don't produce spores, even in normal conditions.

The third is false, Algae can be unicellular <em>and </em>multicellular.

The fourth is false, All the Algae in the world is close to <em>half</em>  of the ogygen in the world.

So that leaves the second, The adult stage is usually long for one-celled organisms.

4 0
3 years ago
What type of metal is iron nitrate
Dima020 [189]

Answer:

tabla periodica 6

Explanation:

.....

6 0
3 years ago
Please help... giving a lot of points and awarding brainliest.
NNADVOKAT [17]
Theoretical Yield of H2SO3: 31.2 g
Percent Yield: 67.4%

Theoretical Yield of C2H6: 6.50
Percent Yield: 88.7%

Theoretical Yield of HF: 3.84
Percent Yield: 71.4%
8 0
3 years ago
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