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3 years ago

Which of the following is an incorrect way of rearranging the density formula:

Chemistry

2 answers:

goldenfox [79]3 years ago

5 0

We know that density = mass /volume
so
mass=volume*density
volume=mass/density
so c is wrong

nlexa [21]3 years ago

5 0

Hello!

Answer: C. 

Explanation:

↓↓↓↓↓↓↓↓↓

Density is the amount of mass in a give volume. It's a derived unit of measure. It equal to mass divided by volume. Then it measured in units such as grams per cubic centimeter and grams per milliliter. Density is the ration of mass to volume. Density is a physical property of an object. Mass is the amount of matter in an object. Volume is the amount of space an objects takes up.

Density formula:

↓↓↓↓↓↓↓↓

$D=\frac{M}{V}$

Volume formula:

↓↓↓↓↓↓↓↓↓

$V=\frac{M}{D}$

Mass formula:

↓↓↓↓↓↓↓↓↓↓↓

$M=D*V$

Hope this helps!

Thank you for posting your question at here on Brainly.

-Charlie

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Westkost [7]

A covalent bond is formed between H and Br
The structure of HBr is as follows
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Formal charge can be calculated as follows ;
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3 years ago

2. Given the unbalanced equation:

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3 years ago

12. A beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. Will it float in water,

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Taking into account the definition of density and Archimedes' principle, the beginner bowling ball will float on the water.

But first it is neccesary to know that density is a quantity referred to the amount of mass in a certain volume of a substance or a solid object.

In other words, the density is the relationship between the weight (mass) of a substance and the volume that the same substance occupies.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

$density=\frac{mass}{volume}$

In this case, a beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. This is:

mass= 4.9 kg= 4900 g (being 1 kg= 1000 kg)
volume= 5.4 L= 5400 mL (being 1L=1000 mL)

Replacing in the definition of density:

$density=\frac{4900 g}{5400 mL}$

Solving:

density=0.907 $\frac{g}{mL}$

On the other hand, Archimedes' principle says that an object immersed in a liquid experiences an upward vertical force equal to the weight of the volume of the dislodged liquid.

The sinking or floating of an object is determined by its density with respect to that of the liquid in which it is submerged.

Considering water as the liquid where the object is submerged in this case, an object with a higher density than water will sink. In contrast, an object with a lower density than water will float.

In this case, considering that water has a density of 1 $\frac{g}{mL}$ , the bowling ball for beginners has a lower density. This indicates that, having a lower density than water, the object will float.

In summary, the beginner bowling ball will float on the water.

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2 years ago

The difference in the heights of the Hg columns in Diagram B is17 mm-Hg. If the atmospheric pressure is 769 mm-Hg, what is the p

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The pressure of the confined gas will be 769-17 = 752 mmHg

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Manometer is a U shaped instrument which is used to measure the pressure acting on a column of fluid , a difference in the pressure in the two arms of the manometer causes the liquid to reach different heights.

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2 years ago

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Answer:

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Explanation:

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From the stoichiometry of the reaction, 1 mol of Na₂O₂ reacts with 1 mol CO₂. So, the stoichiometric ratio is 1 mol Na₂O₂/1 CO₂.

Now, we convert the mass of reactants to moles by using the molecular weight (Mw) of each compound:

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Now, we calculate the number of moles of CO₂ we need to completely react with the mass of Na₂O₂ we have:

1.24 mol Na₂O₂ x 1 mol CO₂/1 mol Na₂O₂ = 1.24 mol CO₂

In 1 L of respired air we have 1.71 x 10⁻³ mol CO₂ (0.0755 g), so we need the following number of liters to have 1.24 mol of CO₂:

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3 years ago