1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
timurjin [86]
3 years ago
13

Which sample is a pure substance?

Chemistry
2 answers:
Drupady [299]3 years ago
6 0

Answer:

a test tube of zinc and oxygen

Explanation:

i just did on edgen

Tema [17]3 years ago
3 0
A test tube of zinc oxide
You might be interested in
What is the order, plz answer
slamgirl [31]

Answer:

C A B

Explanation:

come on, you also know this from normal water waves.

which ones are stronger (= have more energy) ? the small ones or the big ones ?

and the same applies to all waves. the bigger the waves (higher amplitude), the more energy.

7 0
3 years ago
One mole of nitrogen and one mole of neon are combined in a closed container at STP.How big is the container?V = __________ L
cestrela7 [59]

Answer : The volume of container will be 44.8 L

Explanation :

At STP condition,  

The temperature and pressure are 273 K and 1 atm respectively.

As we know that at STP, 1 mole of substance occupies 22.4 L volume of gas.

As per question,

1 mole of nitrogen gas occupies 22.4 L volume

and,

1 mole of neon gas also occupies 22.4 L volume

Thus, total volume will be:

Total volume of container = 22.4 + 22.4 = 44.8 L

Hence, the volume of container will be 44.8 L

5 0
3 years ago
How much energy is added to change 180g of liquid water to gas at 100 degrees Celsius
Finger [1]

Answer:

40.7 kJ  

Step-by-step explanation:

The formula for the heat, q, needed to evaporate a liquid is

q = mΔHvap


<em>Data:  </em>

        m = 180 g

ΔHvap = 2260 J/g

<em>Calculation: </em>

q = 180 g × 2260 /1

q = 40 700 J = 40.7 kJ

7 0
3 years ago
3. At STP, how many liters of oxygen gas are required to react completely with 3.2 x 10^22
Mrrafil [7]

The volume of oxygen required to react with 3.2 * 10²² molecules of hydrogen is 0.56 L.

<h3>What is stoichiometric law?</h3>

The stoichiometric law has been given as the representation of the moles of product and reactant in a chemical reaction are represented by the stoichiometric coefficient.

It has been known that 1 mole of a compound has 6.023 * 10²³ molecules. Thus, the moles of hydrogen gas equivalent to 3.2 * 10²² molecules has been:

6.023 * 10²³ molecules = 1 mole

3.2 * 10²² molecules = 1/6.023 * 10²³ * 3.2 * 10²² moles

3.2 * 10²²  molecules = 0.05 moles

Thus, the moles of hydrogen gas available is 0.05 moles.

From the stoichiometric law, according to the balanced chemical equation,

2 moles of hydrogen requires = 1 moles of oxygen

0.05 moles of hydrogen requires = 1/2 * 0.05 moles oxygen

0.05 moles of hydrogen requires =  0.025 moles oxygen

Thus, the moles of oxygen required is 0.025 moles. At STP, a mole of gas been equivalent to 22.4 L . Thus, the volume of 0.025 moles oxygen has been:

1 mole = 22.4 L

0.025 moles = 22.4 * 0.025 L

0.025 mole = 0.56 L

Thus, the volume of oxygen required to react with 3.2 * 10²² molecules of hydrogen is 0.56 L.

Learn more about stoichiometric law, here:

brainly.com/question/23742235

#SPJ1

7 0
2 years ago
20 POINTS!!
Elza [17]
The answer is option number one
4 0
4 years ago
Read 2 more answers
Other questions:
  • How does water help cells keep an even temperature despite temperature changes in
    9·1 answer
  • Explain the relationship between chemical bonds and energy in the body.
    13·1 answer
  • How many grams of KCl are needed to prepare 1.00 L of a 2.00 M solution
    9·1 answer
  • Elements from group/column ______ will ionically bond with halogens in a 1 to 1 ratio. A) 1 (or 1A) B) 2 (or 2A) Eliminate C) 3
    6·2 answers
  • Given the following equation: Cu + 2 AgNO3 ---&gt; Cu(NO3)2 + 2 Ag If 89.5 grams of Ag were produced, how many grams of Cu react
    6·1 answer
  • Consider butter (density= 0.860 g/mL) and sand (density= 2.28 g/mL). If 1.00 mL of butter were mixed with 1.00 mL of sand and mi
    6·1 answer
  • If 420 joules of heat energy is added to 25 grams of water at 25 degrees celcius, what will be the final temperature of the wate
    13·1 answer
  • What can you infer about a wave with a short wavelength?
    8·2 answers
  • 10 pts.<br>Please help me with my Chemistry question. :'(<br>plz.​
    9·1 answer
  • Can some one help me fill this chart out?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!