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
BabaBlast [244]
4 years ago
9

What sample is a pure substance?A. a test tube of zinc oxide.

Chemistry
2 answers:
Mice21 [21]4 years ago
7 0
The correct answer is A. A test tube of zinc oxide. Zinc oxide is a compound which is a pure substance composed of two or more elements. They can only be separated or broken down into its individual elements or smaller compounds by chemical means. Therefore, the answer is a test tube of zinc oxide.
maks197457 [2]4 years ago
4 0

A is correct i just took the quiz

You might be interested in
Give an example of an unbalanced force.
Margarita [4]
An example is when on a seesaw if a kid is on one side and an adult is on the other then it is unbalanced because the adult weighs more
5 0
3 years ago
Read 2 more answers
In the coordination
mrs_skeptik [129]

Answer: the correct option is A (C.N. = 6; O.N. = +4.)

Explanation:In the coordination

compound[Cr(NH3)(en)2Cl]Br2,

the coordination number (C.N.) and oxidation number (O.N.) of the

metal atom are 6 and +4 respectively.

5 0
3 years ago
Please help!! I'll give 50 points
Zinaida [17]

Answer:

The equilibrium will shift to the right.

Explanation:

  • Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

For the reaction: <em>CH₄ + NH₃ + 1.5O₂ ⇄ HCN + 3H₂O.</em>

<em></em>

Adding NH₃ to the reaction:

  • Adding NH₃ will increase the concentration of the reactants side, so the reaction will be shifted to the right (products) side to suppress the increase in the concentration of NH₃.
3 0
3 years ago
Initially a beaker contains 225.0 mL of a 0.350 M MgSO4 solution. Then 175.0 mL of water are added to the beaker. Find the conce
givi [52]

Answer:

came

Explanation:

7 0
3 years ago
Read 2 more answers
Which of the following serve as antibodies? carbohydrates lipids proteins nucleic acids
s344n2d4d5 [400]

Answer:

I am going with protein.

Explanation:

I am assuming that it is protein because anitbodies and enzymes are the following protiens.

3 0
3 years ago
Other questions:
  • A gas has a volume of 4.54 L at 1.65 atm and 75.0°C. At what pressure would the volume of the gas be increased to 5.33 L if the
    14·1 answer
  • When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 16.8g of carbon were burned in the presence of
    13·1 answer
  • Sodium hydroxide and magnesium chloride react as shown by this equation: 2NaOH + MgCl2 → Mg(OH)2 + 2NaCl. Suppose the reaction b
    7·1 answer
  • What is best way to get salt out of salt water solution
    6·2 answers
  • In which environment would the shell of an organism most likely be preserved as a fossil?
    15·2 answers
  • Select the supplements that are minerals.
    6·1 answer
  • Consider the genetic cross for absent-mindedness, which is a dominant trait. What is the probability that the offspring of this
    11·2 answers
  • All of the following methods would increase the solubility of a solid solute, except for
    12·1 answer
  • In which 2 states of matter can a substance take the shape of its container?
    6·2 answers
  • Is a tooth made out of matter or not matter?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!