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
mario62 [17]
3 years ago
13

Please help with this question:)

Chemistry
2 answers:
Crazy boy [7]3 years ago
5 0
the answer might be C.2:1
netineya [11]3 years ago
5 0
It’s 2:1

Hope this helps (:
You might be interested in
Suppose that, from measurements in a microscope, you determine that a certain layer of graphene covers an area of 2.60μm2. conve
garri49 [273]
Given that 1 micrometer or micron (um) is equivalent by definition to 1 x 10^-6 m, this means that 1 square micron (um^2) is equivalent to (1 x 10^-6)^2 m^2, or 1 x 10^-12 m^2.

(2.60 um^2) * (1 x 10^-12 m^2 / 1 um^2) = 2.60 x 10^-12 m^2
Therefore the layer of graphene covers an area of 2.60 x 10^-12 m^2.
<span />
5 0
3 years ago
Read 2 more answers
A mixture of iron and sulfur can be separated by A.magnetic attraction
Elenna [48]
A. Magnetic attraction
6 0
3 years ago
How many grams of carbon are present in 45.0 g of CCl4?
lisabon 2012 [21]
To determine the amount of a certain element in a compound, we use the ratio of the elements from the compound. We calculate is follows:

45.0 g CCl4 ( 1 mol CCl4 / 153.82 g CCl4 ) ( 1 mol C / 1 mol CCl4 ) ( 12.01 g C / 1 mol C ) = 3.5135 g carbon present

Hope this answers the question. Have a nice day.
5 0
3 years ago
A student weighed an empty graduated cylinder. It weighed 35.86 g. She then carefully added water to the graduated cylinder unti
Firdavs [7]

Question:

A student weighed an empty graduated cylinder. It weighed 35.86 g. She then carefully added water to the graduated cylinder until it reached the 7.5 mL mark. When she weighed the graduated cylinder again, this time with the 7.5 mL of water in it, it weighed 43.18 g. What was this student's experimental density of water?

Answer:

0.976 g/mL

Explanation:

Weight of empty cylinder = 35.86g

Volume of water = 7.5mL

Weight of cylinder + water = 43.18g

Experimental density = ?

Density of water = Mass of water / volume of water

Mass of water = (Weight of cylinder + water) - Weight of empty cylinder

Mass of water = 43.18 - 35.86 = 7.32g

Density = 7.32 / 7.5 = 0.976 g/mL

5 0
2 years ago
During which step in the pcr cycle do primers form bonds with a single-stranded template?.
shutvik [7]
Answer: The first steps

Explanation: science
5 0
2 years ago
Other questions:
  • A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at 95.0°C if Ea =
    11·1 answer
  • A chemical reaction produces 56.2 grams of iron (II) sulfide (FeS). How many moles of iron (II) sulfide does the reaction produc
    9·1 answer
  • How many grams of H2 are needed to produce 10.42 g of NH3
    5·2 answers
  • Plz Help! <br><br> What are antibodies and what role do vaccines play in producing them?
    13·1 answer
  • How many grams in 4.53 moles of MgBr2
    13·1 answer
  • Calculate the mass (in grams) of 8.56 moles of sulfur.
    13·1 answer
  • Question 16
    9·2 answers
  • Scientists Discuss time and how old the Earth is. How do they measure the idea
    7·1 answer
  • HELP ASAP I WILL GIVE BRAINLYIST
    11·2 answers
  • What behavior of light PROVES that it is a wave? Hint: will this ONLY happen because light is a wave, or could it also be true o
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!