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3 years ago

2. Sometimes a few individuals are

Chemistry

1 answer:

sergey [27]3 years ago

7 0

Answer:

macro-evolution

Explanation:

This happens when evolution occurs because of separation of a population.

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In 1954, after he had helped develop the atomic bomb, j. robert oppenheimer was investigated and denied future access to classif

pav-90 [236]

Julius Robert Oppenheimer was an American hypothetical physicist and teacher of material science at the University of California, Berkeley. He was examined and denied future access to grouped data since he had loved ones who had a place with the Communist Party.

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3 years ago

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Which of the following would result in being able to dissolve a greater amount of gas in a solution?

makkiz [27]

Answer:

Lower the temperature of the solution

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3 years ago

What is m/e ratio???????????

Roman55 [17]

Answer: Hello,Mass ratio charge is.....................

Explanation: In mass spectroscopy, the mass-to-charge ratio (symbols: m/z, m/e) of a cation is equal to the mass of the cation divided by its charge. ... The mass of the molecular ion is equal to the molecular weight of the compound. Thus, the mass-to-charge ratio of the molecular ion is equal to the molecular weight of the compound.

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2 years ago

Copper (II) sulfate pentahydrate may be heated to drive off the water of hydration. If 5 g of water are produced, what was the o

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Answer:

13.9g of CuSO4•5H2O

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

CuSO4•5H2O → CuSO4 + 5H2O

Next, we shall determine the mass of CuSO4•5H2O heated and the mass of H2O produced from the balanced equation.

This is illustrated below

Molar mass of CuSO4• 5H2O = 63.5 + 32 + (16x4) + 5(2x1 + 16)

= 63.5 + 32 + 64 + 5(18) = 249.5g/mol

Mass of CuSO4•5H2O from the balanced equation = 1 x 249.5 = 249.5g

Molar mass of H2O = (2x1) + 16 = 18g/mol

Mass of H2O from the balanced equation = 5 x 18 = 90g

From the balanced equation above,

249.5g of CuSO4•5H2O produced 90g of H2O.

Now, we can determine the mass of CuSO4•5H2O needed to produce 5g of H2O. This can be achieved as shown below:

From the balanced equation above,

249.5g of CuSO4•5H2O produced 90g of H2O.

Therefore, Xg of CuSO4•5H2O will produce 5g of H2O i.e

Xg of CuSO4•5H2O = (249.5 x 5)/90

Xg of CuSO4•5H2O = 13.9g

Therefore, 13.9g of CuSO4•5H2O is needed to produce 5g of H2O.

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3 years ago

Where can you find the number of electrons of an<br> element?

andrezito [222]

Answer:

Subtract the charge from the atomic number. When an ion has a positive charge, the atom has lost electrons. To calculate the remaining number of electrons, you subtract the amount of extra charge from the atomic number. In the case of a positive ion, there are more protons than electrons.

Explanation:

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