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3 years ago

If you were asked to convert 25 kg to the unit mg, which of the following would be the first fraction used in the conversion?

1 answer:

7 0

To convert the unit kg to mg, the result needs to be written in scientific notation. And 1 kg = 10^6 mg. So the answer is 2.5*10^7 mg.

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How many grams of Cl2 are in 1.20 x 1024 Cl atoms?

Vaselesa [24]

<h3>Answer:</h3>

70.906 g

<h3>Explanation:</h3>

We are given;

Atoms of Chlorine = 1.2 × 10^24 atoms

We are required to calculate the mass of Chlorine

We know that 1 mole of an element contains atoms equivalent to the Avogadro's number, 6.022 × 10^23.
That is , 1 mole of an element = 6.022 × 10^23 atoms

Therefore; 1 mole of Chlorine = 6.022 × 10^23 atoms

But since Chlorine gas is a molecule;

1 mole of Chlorine gas = 2 × 6.022 × 10^23 atoms

But, molar mass of Chlorine gas = 70.906 g/mol

Then;

70.906 g Of chlorine gas = 2 × 6.022 × 10^23 atoms

= 1.20 × 10^24 atoms

Thus;

For 1.2 × 10^24 atoms ;

= ( 70.906 g/mol × 1.2 × 10^24 atoms ) ÷ (1.20 × 10^24 atoms)

Therefore, 1.20 × 10^24 atoms of chlorine contains a mass of 70.906 g

5 0

2 years ago

What is the molecular weight of bromoform if 2.50X10^-2 mol weighs 6.33 g

babymother [125]

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8 0

2 years ago

All airplanes have mass; therefore, what force pulls them toward the ground?

Marina86 [1]

Answer:

B. Gravity

Explanation:

Gravity pulls stuff down

7 0

2 years ago

Holding temperature and pressure constant, what is the most important feature in determining the phase of a given organic compou

Leni [432]

Holding temperature and pressure constant <span>the most important feature in determining the phase of a given organic compound is pressure. ransfers of organic compounds between phases are controlled by molecular interactions (intermolecular bonding) in the two phases between which transfer is occurring. This is governed by temperature and pressure</span>

3 0

2 years ago

Read 2 more answers

Draw structures from the following names, and determine which compounds are optically active:(c) 1,2-dibromo-2-methylbutane

dolphi86 [110]

The given compound 1,2-dibromo-2-methylbutane is an optically active compound .

Because this compound does not have plane of symmetry (POS) and center of symmetry (COS) i.e. does not have di-symmetry . And also forms non superimposable mirror image . the compound is optically active .

It has chiral center.

Here , the chiral carbon is attached to the 4 distinct groups such as : methyl , ethyl , bromine , bromomethane .

<h3>What is di-symmetry?</h3>

Di-symmetry is that which have no center of symmetry and plane of symmetry and alternate axis of symmetry .

<h3>Chiral center :</h3>

Have Sp3 hybridized center (4sigma bond ) .

4 distinct group is attached to the chiral atom. form non -superimposable mirror image .

<h3>What is optical isomerism ?</h3>

Same molecular formula and same structural formula . also have same physical and chemical properties .

They differ in their behavior towards plane polarized light (ppl) .

Learn more about chiral center here:

brainly.com/question/9522537

#SPJ4

8 0

1 year ago