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2 years ago

The main function of the respiratory system is to –

Chemistry

2 answers:

inn [45]2 years ago

6 0

The answer is D. Exchange gases, mostly carbon dioxide and oxygen, between the body and atmosphere!

34kurt2 years ago

3 0

The answer is d I believe

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What is the name of this compound?

Digiron [165]

2,2-dichloroheptane because we have two Cl we should use the prefix ''di'' and the numbers "2" and "2" indicated that the two functional groups are located on the same second carbon

6 0

3 years ago

The solubility of acetanilide is 12.8 g in 100 mL of ethanol at 0 ∘C, and 46.4 g in 100 mL of ethanol at 60 ∘C. What is the maxi

weqwewe [10]

Answer: 72.41% and 26.90% respectively.

Explanation:

At 60°C, you can dissolve 46.4g of acetanilide in 100mL of ethanol. If you lower the temperature, at 0°C, you can dissolve just 12.8g, which means (46.4g-12.8g)=33.6g of acetanilide must have precipitated from the solution.

We can calculate recovery as:

$\%R=\frac{crystalized\ mass}{initial\ mass}*100 =\frac{33.6\ g}{46.4\ g}*100=72.41\%$

So the answer to the first question is 72.41%.

For the second part just use the same formula, the mass of the precipitate is the final mass minus the initial mass, (171mg-125mg)=46mg.

$\%R=\frac{crystalized\ mass}{initial\ mass}*100 =\frac{46\ mg}{171\ mg}*100=26.90\%$

So the answer to the second question is 26.90%.

3 0

2 years ago

3. The substance that is formed or we finish up with are called.

skad [1K]

Products. I’m not 100% sure because I don’t fully understand what your asking but if you are talking as in chemical reactions, the answer is a product.

6 0

2 years ago

Is corona increasing or decreasing the albedo effect? Explain.

Anna71 [15]

Answer:

corona is increasing

.......

Explanation:

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5 0

2 years ago

Read 2 more answers

How do you raise the boiling point of a liquid?

Naddika [18.5K]

Raise the boiling temperature

6 0

3 years ago