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4 years ago

What is the scientific name for weight?

Chemistry

2 answers:

RideAnS [48]4 years ago

8 0

That is a Newton.

Weight is a force due to gravity.

Weight = mass * acceleration due to gravity, which is a particular case of Newtons Second Law F = m * a.

The unit of force is a Newton so a mass of 2 kilograms = m* g so its weight in newtons = 2 * 9.81 = 19.62 Newtons.

1 Newton is the force causing 1 kilogram to accelerate at 9.81 ms-2.

katovenus [111]4 years ago

5 0

Hello the term for weight is newton

hope this helped.

Cody

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3 years ago

What element has an r.m.m of 72

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3 years ago

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4 years ago

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<u>Answer:</u> The mass fraction of $Fe_2O_3$ in the original sample is 0.637

<u>Explanation:</u>

We are given:

Mass of sample = 3.109 g

Mass of solid residue (Aluminium oxide + iron) = 2.515 g

Amount of mass lost = (3.109 - 2.515) = 0.594 g

The amount of mass lost from the sample is equal to the mass of oxygen lost from iron (III) oxide.

The chemical equation for the reaction of iron (III) oxide with hydrogen follows:

$Fe_2O_3+3H_2\rightarrow 2Fe+3H_2O$

In 1 mole of iron (III) oxide, 2 moles of iron are present and 3 moles of oxygen are present.

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Calculating the mass of iron (III) oxide by using unitary method:

48 grams of oxygen is lost when 159.69 grams of iron (III) oxide is reacted with hydrogen gas

So, 0.594 grams of oxygen will be lost when = $\frac{159.69}{48}\times 0.594=1.98g$ of iron (III) oxide is reacted with hydrogen gas

To calculate the mass fraction of iron (III) oxide, we use the equation:

$\text{Mass fraction of iron (III) oxide}=\frac{\text{Mass of iron (III) oxide}}{\text{Mass of sample}}$

Mass of iron (III) oxide = 1.98 grams

Mass of sample = 3.109 grams

Putting values in above equation, we get:

$\text{Mass fraction of iron (III) oxide}=\frac{1.98g}{3.109g}=0.637$

Hence, the mass fraction of $Fe_2O_3$ in the original sample is 0.637

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4 years ago