3 years ago

Do the following calculation and express the answer using correct scientific notation. (6.00x10^23)y(3.00)/284)

1 answer:

5 0

I know its not the answer but i had to put something bc im jus setting this up im rlly sorry for the inconvenience but i looked it up n got a quizlet n the answer on there was 1.81x10^-4 if it helps

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A scientist is studying two types of worms. Worm X has DNA identical to its parent. Worm Y has a combination of DNA from two par

beks73 [17]

Answer:

2. Worm Y reproduces sexually, which gives it genetic variation.

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3 years ago

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What masses of kbr and water are needed to produce 300. g of a solution that is 3.00 % by mass?

attashe74 [19]

In a solution of KBr and water; KBr is the solute and water is the solvent;
Therefore; to achieve 3% by mass; it means we are going to have 3% of the mass being the solute and the other 97 % being the solvent.
Thus; KBr (solute) = 3/100 × 300 (total mass) = 9 g
Hence; the appropriate masses will be; 9.00 g of KBr and 291 g of water.

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2 years ago

Given that sodium chloride is 39.0% sodium by mass, how many grams of sodium chloride are needed to have 100.mg of Na present? G

seraphim [82]

<u>Answer:</u> The mass of sodium chloride solution present is 0.256 grams.

<u>Explanation:</u>

We are given:

39.0 % of sodium in sodium chloride solution

This means that 39.0 grams of sodium is present in 100 grams of sodium chloride solution

Mass of sodium given = 100 mg = 0.1 g (Conversion factor: 1 g = 1000 mg)

Applying unitary method:

If 39 grams of sodium metal is present in 100 grams of sodium chloride solution