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What is the result of multiplying (2.5 × 1010) × (3.5 × 10-7)? Use the correct number of significant digits.

kow [346]

the result of multiplying (2.5 × 10¹⁰) and (3.5 × 10⁻⁷) is 8.8.10³ (cause the result must have 2 significant number)

<h3><em>Further Explanation</em> </h3>

Significant numbers are numbers obtained from the measurement results of exact numbers and the last number estimated

In scientific notation, all numbers are displayed before the big order is called significant numbers

the scientific notation can be described as:

a, ... x 10ⁿ

a, ... called an important number

10ⁿ is called a big order

Rules for significant numbers in general:

1. all non-zero numbers are significant numbers

2. a zero which is located between two non-zero numbers including a significant number

3. all zeros are located in the final row written behind the decimal point include significant number

4. zero decimal point is not significant number

In the question it is known that (2.5 × 10¹⁰) and (3.5 × 10⁻⁷) both have a significant number in a row 2.5 and 3.5

so that it meets the rule of significant numbers which is multiplication of 2 significant number produces numbers that have the fewest significant numbers, So the multiplication of the two will produce 2 significant number

So that we do the significant number then proceed a big order

1. Multiplication of significant number2.5 x 3.5 = 8.75

2. a big order multiplication 10¹⁰ x 10⁻⁷ = 10¹⁰⁻⁷ = 10³

So the result = 8.75.10³

Because the result must have 2 significant number , the result is 8.8.10³ (8.75 we round up)

<h3><em> Learn more</em></h3>

significant figures brainly.com/question/11151926

significant figures in the following number: 5.67 x 106 brainly.com/question/7539478

the number of significant figures is 0.025 brainly.com/question/10343704

0.080 significant figures brainly.com/question/1999241

the fewest number of significant figures brainly.com/question/11464470

5 0

3 years ago

Read 2 more answers

A chemist prepares a solution of sodium thiosulfate (Na2S203) by measuring out 110.g of sodium thiosulfate into a 350. mL volume

forsale [732]

Answer:

1.99 M

Explanation:

The molar mass of sodium thiosulfate (solute) is 158.11 g/mol. The moles corresponding to 110 grams are:

110 g × (1 mol/158.11 g) = 0.696 mol

The volume of solution is 350 mL = 0.350 L.

The molarity of sodium thiosulfate is:

M = moles of solute / liters of solution

M = 0.696 mol / 0.350 L

M = 1.99 M

5 0

3 years ago

List two possible steps where impurities may be gained, which would appear to be an increase in copper

Arisa [49]

Answer:

i) During washing

ii) During Measurement

Explanation:

The two possible steps are :

<u>i) During washing </u>: during the washing method the residue may be not completely dried out and this residue ( water) will add up to the final product ( copper yield ) and this kind of error is called human error.

<u>ii) During measurement </u>: If the weighing instrument is faulty there might be addition in value of the final copper yield which will see the final yield value > 100% . this error occurs when the initial value and final value is been weighed

8 0

3 years ago

You have 185 mL of an acid with an unknown concentration. To determine the concentration you decide to use a 0.85 M solution of

kondor19780726 [428]

Explanation:

The given data is as follows.

$M_{1}$ = ?, $M_{2}$ = 0.85 M

$V_{1}$ = 185 mL, $V_{2}$ = 35.7 mL

where, $M_{1}$ is concentration of acid

$V_{1}$ is the volume of acid

$M_{2}$ is the concentration of base

$V_{2}$ is the volume of base

According to the neutralization formula.

$M_{1} \times V_{1}$ = $M_{2} \times V_{2}$

Now, substituting the given values into the above formula as follows.

$M_{1} \times V_{1}$ = $M_{2} \times V_{2}$

$M_{1} \times 185 mL$ = $0.85 M \times 35.7 mL$

$M_{1}$ = 0.164 M

Thus, we can conclude that concentration of acid is 0.164 M.

8 0

3 years ago

How long does it take for food to pass from the stomach to the small intestine?

adell [148]

Answer: 6 to 8 hours

Explanation:After you eat, it takes about six to eight hours for food to pass through your stomach and small intestine. Food then enters your large intestine (colon) for further digestion, absorption of water and, finally, elimination of undigested food.

7 0

3 years ago