All categories

4 years ago

A student mixed together 8 g of sugar, 5.20 g of salt

Chemistry

2 answers:

maw [93]4 years ago

7 0

its C) 113.21g

u just add all the masses

stich3 [128]4 years ago

4 0

When adding values, the rules for the significant figures say that your answer should have as much decimal digits as the number with the least digits after the comma. In this case, 0 as ‘8 g’ has no decimals. For a multiplication you should look at significant numbers. If you would multiply these values, the answer would only be allowed to have 1 digit multiplied by a power of 10. The answer for this question is therefore 113 g as you follow the rules for addition (decimals).

You might be interested in

A substance that is ______ will NOT dissolve in a solvent. A) freezing B) insoluble C) evaporating D) soluble

Alexxandr [17]

Answer:

insoluble

Explanation:

4 0

3 years ago

Read 2 more answers

A student wants to make a 0.600 M aqueous solution of barium sulfate, BaSO4, and has a bottle containing 12.00 g of barium sulfa

love history [14]

<u>Answer: </u>The volume of the solution is 85.7 mL

<u>Explanation:</u>

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

$\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (mL)}}$ .....(1)

We are given:

Molarity of solution = 0.600 M

Given mass of $BaSO_4$ = 12.00 g

We know, molar mass of $BaSO_4=[(1\times 137.33)+(1\times 32.07)+(4\times 16)]=233.4g/mol$

Putting values in equation 1, we get:

$0.600=\frac{12.00\times 1000}{233.4\times \text{Volume of solution}}\\\\\text{Volume of solution}=\frac{12.00\times 1000}{233.4\times 0.600}=85.68mL=85.7mL$

The rule of significant number that is applied for the problems having multiplication and division:

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Here, the least number of significant figures is 3 that is determined by the number, 0.600. Thus, the answer must have these many significant figures only.

Hence, the volume of the solution is 85.7 mL

5 0

3 years ago

How many atoms of Fe are in 45.00 grams of Fe?

Licemer1 [7]

Answer:

4.852*10^23

Explanation:

Use dimensional analysis.

First turn grams to moles using the molar mass of Fe (you can't convert to atoms from grams).

Then turn moles into atoms using Avogadro's constant.

45g Fe/55.85 g/mol Fe*6.022*10^23 atoms Fe

6 0

3 years ago

Because of friction?

Zanzabum

Answer:

what do you mean?

Explanation:

5 0

3 years ago

Read 2 more answers

if you are a scientific or a inventor what do you want to discover or to invent relate to electrogmagnetism

puteri [66]

Answer:

Michal Faraday 19th century

5 0

3 years ago