All categories

3 years ago

Which statement describes how a molecule of water is formed?

Chemistry

1 answer:

dem82 [27]3 years ago

7 0

Answer:

Explanation:

You might be interested in

Aspirin is well known as a pain reliever (analgesic) and as a fever reducer (antipyretic). It has a molar mass of 180.2 g/mol an

denis23 [38]

Answer: The molecular formula of aspirin is $C_8H_8O_2$

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of C= 60.0 g

Mass of H = 4.5 g

Mass of O = 35.5 g

Step 1 : convert given masses into moles.

Moles of C = $\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{60.0g}{12g/mole}=5.00moles$

Moles of H = $\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{4.5g}{1g/mole}=4.5moles$

Moles of O = $\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{35.5g}{16g/mole}=2.22moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = $\frac{5.00}{2.22}=2$

For H = $\frac{4.5}{2.22}=2$

For O = $\frac{2.22}{2.22}=1$

The ratio of C : H: O= 2: 2: 1

Hence the empirical formula is $C_2H_2O$

The empirical weight of $C_2H_2O$ = 2(12)+2(1)+1(16)= 42g.

The molecular weight = 180.2 g/mole

Now we have to calculate the molecular formula.

$n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{180.2}{42}=4$

The molecular formula will be= $4\times C_2H_2O=C_8H_8O_2$

7 0

4 years ago

Read 2 more answers

I really need help im looking for a tutor for a week so can someone pls help me SCIENCE

kozerog [31]

Answer:

I can, or could of

Explanation:

8 0

3 years ago

What is the approximate wavelength of visible light?

hammer [34]

Answer:

its answer A....that's the answer is

$7 \times 10 ^ - 7$

Explanation:

The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible to the human eye. Essentially, that equates to the colors the human eye can see. It ranges in wavelength from approximately 400 nanometers (4 x 10 -7 m, which is violet) to 700 nm (7 x 10-7 m, which is red).

7 0

3 years ago

PLS HELP FOR BRA.INLIEST

snow_tiger [21]

C bc the answer is 75

3 0

3 years ago

Read 2 more answers

The modern form of the periodic table results in the _____ ,which states that when elements are

stiv31 [10]

Answer:

The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties

4 0

3 years ago