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
Misha Larkins [42]
3 years ago
15

Which sample is a pure substance?

Chemistry
2 answers:
jeka57 [31]3 years ago
7 0

The correct answer is: A. a test tube of zinc oxide

Sunny_sXe [5.5K]3 years ago
6 0
A test tube of zinc oxide
You might be interested in
If one molecule of glucose (C6H12O6) reacts completely with three molecules of oxygen (O2), what is the TOTAL number of atoms th
USPshnik [31]

Answer;

30 atoms

Explanation;

When glucose, C6H12O6, reacts with oxygen it produces carbon dioxide and water. If a molecule of glucose reacts completely with three molecules of oxygen, then 30 atoms would be produced because there are 24 atoms in glucose and 6 atoms in oxygen molecules.

The equation for the reaction would be;

C6H12O6 + 6O2(g) → 6CO2(g) + 6 H2O(l)

7 0
4 years ago
Read 2 more answers
You are performing an experiment that uses 114Ag. 113Ag is radioactive, decays by beta-- emission and has a half-life of 21 minu
maxonik [38]

Answer: The 234.74 grams of sample should be ordered.

Explanation:

Let the gram of  114 Ag to ordered be N_o

The amount required for the beginning of experiment = 0.0575 g

Time requires to ship the sample = 4.2hour = 252 min(1 hr = 60 min)

Half life of the sample ={t_{\frac{1}{2}} = 21 min

\lambda =\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{21 min}=0.033 min^{-1}

\log[N]=\log[N_o]-\frac{\lambda t}{2.303}

\log[0.0575 g]=\log[N_o]-\frac{0.033 min^{-1}\times 252 min}{2.303}

N_o=234.74 grams

The 234.74 grams of sample should be ordered.

4 0
3 years ago
Calculate the volume of liquid in the tank sketched below. Give your answer in liters, and round to the nearest 0.1 L.
tensa zangetsu [6.8K]

Answer:

The answer is 18.9

Explanation:

3 0
3 years ago
Find the volume of a rectangular prism that is<br> 25 cm by 10 cm by 15 cm.<br> height<br> length
Stolb23 [73]

Answer:

3750 cm.

Explanation:

You multiply the three side measurements to find the volume.

25cm·10cm·15cm

375cm·10cm

3750 cm.

<em><u>Hope this helps!</u></em>

4 0
3 years ago
Read 2 more answers
In a chemical reaction how does the mass of the products compare with the mass of the reaction a greater thenb less thenc equal
Neko [114]
D.) It depends cuz no yeild is 100%..I mean side reactions also occur in most of the reactions. So mass of the reactant is not equal to the mass of the product. Hope it helps
5 0
4 years ago
Other questions:
  • A double replacement reaction can be best described as a reaction in which
    10·1 answer
  • A student decreases the temperature of 556 cm^3 balloon from 278 K to 231 K. Assuming constant pressure, what should the new vol
    10·1 answer
  • which statement is true about a molecule? a) a molecule is identical to the component elements. b) a molecule retains the physic
    11·2 answers
  • Why is the behavior of real gases still useful?
    6·1 answer
  • Which of the following measures the radiation given off by atoms per second?
    9·2 answers
  • PLZ HELP - WILL MARK BRAINLIEST *
    9·1 answer
  • If you wanted a three-dimensional sense of the shape of a molecule and you were not interested in the internal bonds, which mode
    7·2 answers
  • In scientific notation, the number 0.00262 is expressed as
    8·2 answers
  • What can be done to remove a magnetic force around an electromagnet
    14·1 answer
  • How many atoms in Ga2Se3
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!