Can you summarise the life of Isaac Newton and his contribution to the world of Science?

Chemistry

1 answer:

Molodets [167]3 years ago

6 0

How long does it need to be

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Distinguish between matter and a substance

Irina18 [472]

Answer:

Matter is a physical substance that contains mass. A substance is a particular kind of matter with uniform chracteristics.

Explanation:

Remeber that matter is anything that has mass and takes up space :)

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3 years ago

What is the relationship between metals and the number of electrons in the outer level?

gayaneshka [121]

Elements in group 1-2, 13-18, the number of valence electrons is related to the group number. For example, in the first group, the alkali metals there is one valence electron, however in group 13, there are 3 valence electrons. Valence electrons are also known as the outershell electrons.

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3 years ago

A student isolated 25 g of a compound following a procedure that would theoratically yield 81 g. Wht was his percentt yield?

Sati [7]

Answer: The percent yield of the compound is 30.86 %.

Explanation:

To calculate the percentage yield of a compound, we use the equation:

$\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100$

Experimental yield of compound = 25 g

Theoretical yield of compound = 81 g

Putting values in above equation, we get:

$\%\text{ yield of compound}=\frac{25g}{81g}\times 100\\\\\% \text{yield of compound}=30.86\%$

Hence, the percent yield of the compound is 30.86 %.

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4 years ago

How many Joules are there in 55 nutritional calories?

Sidana [21]

Answer:

230.12

Explanation:

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[Send a message] as you move across a row from left to right in the period table, atomic numbers of the elements

SashulF [63]

I think it might be D or B
And my other two might be A or C

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4 years ago