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Softa [21]
3 years ago
14

What is the density of a 25.8 g piece of broken glass that has a volume of 10.3 cm cubed

Chemistry
1 answer:
Anna11 [10]3 years ago
3 0

Answer:

2.5 g/cm^3

Explanation:

<em>Density </em><em>=</em><em> </em><em>mass</em><em> </em><em>÷</em><em> </em><em>volume</em>

<em>d =  \frac{m}{v}</em>

<em>d =  \frac{25.8}{10.3}</em>

<em>d =  2.5</em>

The final answer has been rounded to one decimal point - the real answer is much longer.

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CK-12 Boyle and Charles's Laws if Mrs. Pa pe prepares 12.8 L of laughing gas at 100.0 k Pa and -108 °C and then she force s the
nirvana33 [79]

Answer:

The answer to your question is   P2 = 2676.6 kPa

Explanation:

Data

Volume 1 = V1 = 12.8 L                        Volume 2 = V2 = 855 ml

Temperature 1 = T1 = -108°C               Temperature 2 = 22°C

Pressure 1 = P1 = 100 kPa                    Pressure 2 = P2 =  ?

Process

- To solve this problem use the Combined gas law.

                     P1V1/T1 = P2V2/T2

-Solve for P2

                     P2 = P1V1T2 / T1V2

- Convert temperature to °K

T1 = -108 + 273 = 165°K

T2 = 22 + 273 = 295°K

- Convert volume 2 to liters

                       1000 ml -------------------- 1 l

                         855 ml --------------------  x

                         x = (855 x 1) / 1000

                         x = 0.855 l

-Substitution

                    P2 = (12.8 x 100 x 295) / (165 x 0.855)

-Simplification

                    P2 = 377600 / 141.075

-Result

                   P2 = 2676.6 kPa

3 0
3 years ago
Lion 7
Sidana [21]

Answer:

A.

Explanation:

You should NEVER eat or drink anything in a lab area. You never know what chemicals or gases are in the lab, and they can harm you.

Wearing a drawstring hoodie won't protect you from chemicals.

Don't wait to clean up chemicals, immediately get a teacher and clean it up (follow the teachers instructions). You never know what has spilled, and if it is harmful or not, or if there is a certain procedure to clean it up.

Don't change the equipment in the middle of an experiment. This can tamper with your results, and depending on what you are working with, this can be dangerous.

3 0
3 years ago
The animal kingdom is large and diverse. Scientists discover new species all the time, and they need a way to classify them. The
tatiyna

The answer is D, because "Animals without a backbone are invertebrates."

4 0
3 years ago
Help with this question
NeTakaya
Isotope atoms mean, atoms with the same number of protons but different number of neutrons in their nuclei . The given oxygen atoms are isotopes meaning they have different number of neutrons in their nuclei . Oxygen 16 have 8 protons and 8 neutrons in its nucleus but Oxygen has 8 protons and 10 neutrons. That's what make them different.

3 0
3 years ago
Read 2 more answers
Enzymes work by _____. enzymes work by _____. decreasing the potential energy difference between reactant and product adding ene
Anton [14]
The appropriate answer is they decrease the potential energy difference between reactant and product. They do this by bringing products and reactants together at the active site on the enzyme molecule. Enzymes are biological catalysts. They increase the rate of a chemical reaction without being used up in the reaction itself. So one molecule of an enzyme is used many times to catalyze the reaction of other molecules. 
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3 years ago
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