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3 years ago

Which of the following pieces of glassware can be used to measure the volume of a liquid with the greatest accuracy?

Chemistry

1 answer:

Anit [1.1K]3 years ago

8 0

Graduated cylinders, beakers, but the most accurate ones are volumetric pipets, flasks and burets.

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What does an aluminum atom become when it loses its three valence electrons? a?

Artist 52 [7]

Aluminum atomic number 13 becomes Neon with an atomic number of 10 when it loses three valence electrons.

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3 years ago

What is the percent composition by mass of hydrogen in nh4hco3

Simora [160]

<u>Answer:</u> The percent composition by mass of hydrogen in given compound is 6.33 %

<u>Explanation:</u>

We are given:

A chemical compound having chemical formula of $NH_4HCO_3$

It is made up by the combination of 1 nitrogen atom, 5 hydrogen atoms, 1 carbon atom and 3 oxygen atoms

To calculate the percentage composition by mass of hydrogen in the compound, we use the equation:

$\%\text{ composition of Hydrogen}=\frac{\text{Mass of hydrogen}}{\text{Mass of compound}}\times 100$

Mass of compound = $[(1\times 14)+(5\times 1)+(1\times 12)+(3\times 16)]=79g/mol$

Mass of hydrogen = $(5\times 1)=5g/mol$

Putting values in above equation, we get:

$\%\text{ composition of Hydrogen}=\frac{5g/mol}{79g/mol}\times 100=6.33\%$

Hence, the percent composition by mass of hydrogen in given compound is 6.33 %

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3 years ago

HELP ME PLEASE ILL MARK U THE BRAINLIEST

ElenaW [278]

Answer:

pentene-alkanes-C5H10

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3 years ago

A box is sitting on a table. The upward force exerted on the box that stops it from falling through the table is known as the __

romanna [79]

It is know as the normal force.

When a solid is placed on a support, the latter exerts forces on the solid at each point of contact. These are forces that oppose the weight and prevent an object from falling.

This force is usually vertical and upward and often offsets the weight. If the solid is in equilibrium on the support the forces compensate the weight of the solid.

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3 years ago

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Which type of bond will form between two chlorine atoms?

DerKrebs [107]

Answer:

D. a nonpolar covalent bond

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2 years ago

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