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3 years ago

Which part of the water cycle will help an area that is flooded?

2 answers:

5 0

The correct answer is evaporation unless the area is largely populated by fallen trees, which in this case i would guess not

yarga [219]3 years ago

3 0

Evaporation - water will be drawn out of the flooded area.

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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]

Answer: The mass of sodium chloride solution present is 0.256 grams.

Explanation:

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

So, if 0.1 grams of sodium metal will be present in = $\frac{100}{39}\times 0.1=0.256g$ of sodium chloride solution.

Hence, the mass of sodium chloride solution present is 0.256 grams.

8 0

3 years ago

Calculate the ratio of effusion rates of cl2 to f2 .

WINSTONCH [101]

Answer: Graham's law of gaseous effusion states that the rate of effusion goes by the inverse root of the gas' molar mass. râšM = constant Therefore for two gases the ratio rates is given by: r1 / r2 = âš(M2 / M1) For Cl2 and F2: r(Cl2) / r(F2) = âš{(37.9968)/(70.906)} = 0.732 (to 3.s.f.)

6 0

3 years ago

Write an importance of endothermic reactions

KengaRu [80]

Answer:

the uses of exothermic reactions are:

1) lighting of stove

2) self heating cans

3) hand warmers

4) in some case exothermic process can be used to cook food such as rice (by adding calcium oxide to water heat is evolved and it helps to cook food )

Explanation:

hope this helps you pls mark me as brainilst

8 0

3 years ago

What element was named for the scientist who discovered the nucleus of the atom using gold foil

Artist 52 [7]

rutherfordium element # 104

4 0

3 years ago

What is the gravitational force between two masses of 1 kg each kept at the distance of 1m?

Eddi Din [679]

Answer:

Explanation:

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6 0

3 years ago