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xenn [34]
2 years ago
7

How many valence electrons would there be for the element with the following orbital diagram?

Chemistry
1 answer:
Svetach [21]2 years ago
8 0

Answer:

6

Explanation:

The p orbital needs 2 more electrons.

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Red #40 has an acute oral LD50 of roughly 5000 mg dye/1 kg body weight. This means if you had a mass of 1 kg, ingesting 5000 mg
FrozenT [24]

Answer:

350 g dye

0.705 mol

2.9 × 10⁴ L

Explanation:

The lethal dose 50 (LD50) for the dye is 5000 mg dye/ 1 kg body weight. The amount of dye that would be needed to reach the LD50 of a 70 kg person is:

70 kg body weight × (5000 mg dye/ 1 kg body weight) = 3.5 × 10⁵ mg dye = 350 g dye

The molar mass of the dye is 496.42 g/mol. The moles represented by 350 g are:

350 g × (1 mol / 496.42 g) = 0.705 mol

The concentration of Red #40 dye in a sports drink is around 12 mg/L. The volume of drink required to achieve this mass of the dye is:

3.5 × 10⁵ mg × (1 L / 12 mg) = 2.9 × 10⁴ L

8 0
3 years ago
Which of the following types of radiation can penetrate the most deeply into your body?
ivolga24 [154]

Answer:

gamma rays

Explanation:

6 0
3 years ago
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Look at the picture below. Name the isotope.
Aleks [24]

Answer:

carbon-13

Explanation:

6 0
2 years ago
Q3. A student wanted to make blue copper sulfate crystals from green copper carbonate powder
CaHeK987 [17]

Heat the sulfuric acid solution and adding copper carbonate in it.

<h3>Improvement require in this experiment</h3>

The method could be improved by heating sulfuric acid solution and add copper carbonate into the solution of sulfuric acid. Add the copper carbonate until it is present in excess amount. After that filter the extra amount of copper carbonate so in this way the blue copper sulfate crystals are produced.

Learn more about copper here: brainly.com/question/3157958

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2 years ago
Assuming a total pressure of 9.3 atmatm , what is the partial pressure of helium in the mixture of 98%% helium and 2.0%% oxygen
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Answer:

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Explanation:

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