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3 years ago

Which state of matter is this:Particles vibrate and change positions

2 answers:

8 0

Gas vibrate and move freely at high speeds. liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.

xeze [42]3 years ago

5 0

Liquiddddddddddddddd

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The nucleus of a fluorine atom has a charge of?

wariber [46]

Answer: B

Explanation: A fluorine atom has nine protons and nine electrons, so it is electrically neutral. (neutral =0)

6 0

3 years ago

A student placed 10.5 g of glucose (C6H12O6) in a volumetric fla. heggsk, added enough water to dissolve the glucose by swirling

aniked [119]

<u>Answer:</u> The mass of glucose in final solution is 0.420 grams

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

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

Initial mass of glucose = 10.5 g

Molar mass of glucose = 180.16 g/mol

Volume of solution = 100 mL

Putting values in equation 1, we get:

$\text{Initial molarity of glucose}=\frac{10.5\times 1000}{180.16\times 100}\\\\\text{Initial molarity of glucose}=0.583M$

To calculate the molarity of the diluted solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated glucose solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted glucose solution

We are given:

$M_1=0.583M\\V_1=20.0mL\\M_2=?M\\V_2=0.5L=500mL$

Putting values in above equation, we get:

$0.583\times 20=M_2\times 500\\\\M_2=\frac{0.583\times 20}{500}=0.0233M$

Now, calculating the mass of final glucose solution by using equation 1:

Final molarity of glucose solution = 0.0233 M

Molar mass of glucose = 180.16 g/mol

Volume of solution = 100 mL

Putting values in equation 1, we get:

$0.0233=\frac{\text{Mass of glucose in final solution}\times 1000}{180.16\times 100}\\\\\text{Mass of glucose in final solution}=\frac{0.0233\times 180.16\times 100}{1000}=0.420g$

Hence, the mass of glucose in final solution is 0.420 grams

3 0

4 years ago

List and discuss at least 4 reasons why a laboratory should operate using GLP.

Drupady [299]

Answer:

The list and discussions are stated below:

Explanation:

Good Laboratory Practice (GLP) is extremely important.

1. Organization

With GLP we can guarantee an organized work environment, which is essencial in a laboratory.

2. Safety

GLP promotes laboratory safety for personell, avoiding unecessary risks and preventing accidents.

3. Quality control

GLP ensures that experiments made and products developed in a laboratory have the demanded quality.

4. Reliability of results

GLP promotes quality of results reporting, wich directly influences the reliability of results.

7 0

4 years ago

Which unit conversion allows you to convert 21.0 gallons into milliliters?

Romashka-Z-Leto [24]

79470.2mL

Explanation:

Given:

Volume = 21gallons

problem, convert to milliliters;

gallons to milliliters

1 liter = 1.057 quarts

1 gallon = 4 quarts

we can simply solve this by establishing and using a conversion factor of 1 ;

1 gallon = 4 quarts

1.057 quarts = 1 liter

0.001L = 1mL

21gallons x $\frac{4qt}{1gal} x \frac{1 liter}{1.057qt} x \frac{1mL }{0.001L}$ = 79470.2mL

we say;

From; $\frac{4qt}{1gal} x \frac{1 liter}{1.057qt} x \frac{1mL }{0.001L}$

1gallon = 3784.2mL

learn more:

conversion brainly.com/question/1548911

#learnwithBrainly

8 0

3 years ago

a chemist wants to combine carbon and iron to form steel. what type of bond will this chemist create between these two elements

iVinArrow [24]

I think its a covalent bond because carbon is positively charged and iron is positively charged too which makes the bond covalent. hope it helps

5 0

3 years ago