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
Natali5045456 [20]
3 years ago
10

Please help with this question

Chemistry
2 answers:
cestrela7 [59]3 years ago
8 0
The first square because as the time is going up so is the distance
ikadub [295]3 years ago
4 0
First square to the right
You might be interested in
You perform a combustion analysis on a 255 mg sample of a substance that contains only C, H, and O, and you find that 561 mg of
zhuklara [117]
The combustion of an organic compound is mostly written as,
                        CaHbOc + O2 --> CO2 + H2O
where a, b, and c are supposed to be the subscripts of the elements C, H, and O in the compound. Determining the number of moles of C and H in the product which is the same as that in the compound,
   (Carbon, C)   :   (561 mg) x (12/44) = 153 mg x (1 mmole/12 mg) = 12.75
   (Hydrogen, H) :  (306 mg) x (2/18)  = 34 mg x (1 mmole/1 mg) = 34 
   Calculating for amount of O in the sample,
(oxygen, O) = 255 - 153 mg - 34 mg = 68 mg x (1mmole/16 mg) = 4.25 
The empirical formula is therefore,
                        C(51/4)H34O17/4
                           C3H8O1
The molar mass of the empirical formula is 60. Therefore, the molecular formula of the compound is,
                                C9H24O3
5 0
3 years ago
Read 2 more answers
A solution
timurjin [86]
The answer to your question is  C.  A solution is a homogeneous mixture composed of two or more substances, so it couldn't have been A and D. Since a solution can't have its substances separated by a chemical means because they are chemically bonded, thus they are able to be separated by physical means 
3 0
3 years ago
Materials Visible Uniform Not Visible Non- Uniform State of Matter 1. Sugar and water 2. Oil and water 3. Vinegar and water 4. S
salantis [7]

Answer:

1. Uniform, non visible

2. Visible, non uniform

3. Uniform, non visible

4. Visible, non uniform

5. Visible, non uniform

Explanation:

A heterogeneous mixture is simply any mixture that is not uniform in composition — it's a non-uniform mixture of smaller constituent parts. By contrast, a mixture that is uniform in composition is a homogenous mixture

visible state of matter is when you can easily difference two components of a mixture

non visible is when the state of the matter in the substance is not visible to the eye, it can't be differentiated

4 0
3 years ago
Read 2 more answers
The valence electrons occur in what part of the atom?
shutvik [7]
The correct answer to the question that is stated above is letter  c, <span> the outer electron shell.</span>

Valence electrons occur<span> in the outermost shells of an </span>atom.

>> <span>Valence electrons are </span>electrons<span> that are associated with an </span>atom<span>, and that can participate in the formation of a </span>chemical bond.
7 0
3 years ago
Read 2 more answers
What are the SI units of frequency?
Tomtit [17]
SI unit of frequency is Hertz(Hz)
7 0
3 years ago
Other questions:
  • How much heat is needed to raise the temperature of a 5.0 gram block of aluminum from 22.0°c to 37.0°c?
    15·2 answers
  • What are two main types of sedimentary rocks
    10·2 answers
  • two substances react and the mass is recorded.The mass of the products does not equal the mass of the reactants .Which is the be
    5·1 answer
  • If you are involved in a vehicle accident, you should not drink any alcohol up to ___ hours after the accident or you could be l
    7·1 answer
  • Arrange the following ions in order of increasing ionic radius: K+, P3–, S2–, Cl–.
    8·1 answer
  • If 21 mL f gas is subjected to a temperature change from 10.0C to 120C and a pressure change from 1.0 atm to 15 atm, the new vol
    9·1 answer
  • What is the oxidation number for CI?<br> -2<br> +2<br> -1<br> +1
    7·1 answer
  • Which would increase the rate of dissolving salt into water?
    15·1 answer
  • Which element will most easily form positive ions? Why?
    8·1 answer
  • When a reaction mixture reaches chemical equilibrium, ____.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!