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1 year ago

Perform the following operation

Chemistry

1 answer:

Yanka [14]1 year ago

3 0

Taking into account the scientific notation, the result of the sum is 10.84300×10³.

Scientific notation

First, remember that scientific notation is a quick way to represent a number using powers of base ten.

The numbers are written as a product:

a×10ⁿ

where:

a is a real number greater than or equal to 1 and less than 10, to which a decimal point is added after the first digit if it is a non-integer number.
n is an integer, which is called an exponent or an order of magnitude. Represents the number of times the comma is shifted. It is always an integer, positive if it is shifted to the left, negative if it is shifted to the right.

Sum in scientific notation

You want to add two numbers in scientific notation. It should be noted that when the numbers to be added do not have the same base 10 exponent, the base 10 power with the highest exponent must be found. In this case, the highest exponent is 3.

Then all the values are expressed as a function of the base 10 exponent with the highest exponent. In this case: 9.7300×10²= 0.97300×10³

Taking the quantities to the same exponent, all you have to do is add what was previously called the number "a". In this case:

0.97300×10³ + 9.8700×10³= (0.97300+ 9.8700)×10³= 10.84300×10³

Finally, the result of the sum is 10.84300×10³.

Learn more:

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when 25 ml of 0.12 m aqueous ammonia is titrated with 0.12 m hydrobromic acid, what is the ph at the equivalence point?

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The pH of solution at equivalence point is 5.2...

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1 year ago

A laboratory experiment requires 250 millimeters of water for boiling. It also requires 100 millimeters of water for a cooling p

Wewaii [24]

Answer:

1.05 L

Explanation:

There is some info missing I think this is the original question.

A laboratory experiment requires 250 millimeters of water boiling. it also requires 100 mills of water for a cooling process. If a student performs the experiment three times, how much total water will the student need? Give your answer in liters.

Step 1: Calculate the volume required for each experiment.

The volume required is the sum of the volumes used: 250 mL + 100 mL = 350 mL

Step 2: Calculate the volume required for the 3 experiments

We have to multiply the volume required for each experiment by 3.

3 × 350 mL = 1050 mL

Step 3: Convert the volume to liters

We use the relation 1 L = 1000 mL.

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2 years ago

Gina was given an irregularly shaped piece of metal and was told that the density of the metal was 10 g/cm3. She measured the ma

Vilka [71]

Answer:

The volume of the piece of the metal Gina is found to be 21 $cm^{3}$

Explanation:

Given density of the metal = 10 g/ $cm^{3}$

Given mass of the piece of the metal = 210 g

Assuming volume of piece of metal to be V $cm^{3}$

The expression for the density is shown below

$\textrm{Density} = \displaystyle \frac{\textrm{Mass of piece of metal}}{\textrm{Volume of piece of metal}}\\10 \textrm{ g/cm}^{3} = \displaystyle \frac{210 \textrm{ g}}{V} \\V = 21 \textrm{cm}^{3}$

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2 years ago

Of the molecules below, only ________ is polar.

NNADVOKAT [17]

Answer:

The correct answer is option c, that is, H2O.

Explanation:

The two broad classes of molecules are the polar and nonpolar molecules. Polarity illustrates the dispersion of electrical charge surrounding a molecule. The charge is unevenly distributed in a polar molecule, while it is distributed evenly in a nonpolar molecule. It can be said that a polar molecule possesses the regions of partial charge.

A polar molecule like water possesses a dipole, that is, a part of the molecule exhibit a partial negative charge, and the part of the molecule possesses a partial positive charge. Generally, a polar molecule comprises polar or ionic covalent bonds. The polar molecules are generally soluble in polar solvents and are hydrophilic. They have higher melting points because of the strong intermolecular forces between them in the form of hydrogen bonding.

In the given options, H2O is a polar molecule as the hydrogen atoms electrons get fascinated towards the oxygen atom's electrons, which forms a positive charge on the atoms of hydrogen, and a negative charge on the oxygen atom.

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2 years ago

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