CHEMISTRY MIDDLE SCHOOL

What's the difference between a molecular formula and a structural formula

Answers

Answer 1
Answer:

Answer:

A molecular formula will show the actual number of atoms in a molecule, while the structural formula will show the organization and layout of the atoms in the compound.

Explanation:

i took a test and this was the answer
Answer 2
Answer: Glucose and Galactose both have the same molecular formula, C6H12O6, but in the body, galactose must be first converted to glucose to make energy. The difference is their structures 

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What two factors affect the rate of acceleration of an object?

Answers

The two factors are speed and time. Acceleration occurs as speed increases over time. To measure acceleration, we need to know the starting speed, the time, and the final speed of the object. Also, an object is considered to be accelerating if it is changing direction. Thus, something traveling in a circle is constantly accelerating.

Answer:

The two factors are speed and time. Acceleration occurs as speed increases over time. To measure acceleration, we need to know the starting speed, the time, and the final speed of the object. Also, an object is considered to be accelerating if it is changing direction. Thus, something traveling in a circle is constantly accelerating.

Explanation:

Explain how the scientific method helps scientists.

Answers

As scientists work hard for the results, they may get biased and may sometimes come up with an answer that is based on that. In order to avoid such circumstances, scientific method is put into practice.

Explanation:

  • Personal preferences can some times affect a scientific answer. That is not desirable as the experiments will be repeated by different individuals and the same results should be obtained.
  • That leads to the importance of documentation of systemic observation, formation of hypothesis and the experimentation to confirm the results, which is the scientific way of coming up with the answer to a scientific problem.
  • Scientific methods thus helps in bringing more credibility to findings of the scientists and can be repeated by others to obtain the same results.

A typical carbon atom has six protons, six neutrons, and six electrons. Which of these has the least amount of mass?A) one Proton
B) one Neutron
C) six Electrons
D) These masses are too tiny to measure

Answers

Answer:

C

Explanation:

Answer:

six electrons

Explanation:

Electrons have almost virtually no mass and much less than a proton and neutron.  

(a neutron and electron have about 1 amu while electrons have 0.000548 amu)

Stirring a liquid while you are mixing in another ingredient speeds up the rate of dissolving. Question 13 options: True False

Answers

Answer:

true

Explanation:

This is because it helps distribute the particles that are being dissolved. 
The answer would be true

How many grams of C3H8 would be needed to produce 6.39 grams of CO2?

Answers

Answer:

2.13g

Explanation:

Atomic mass of CO2 =  12 + 32 = 44g/Mol

Atomic mass of C3H8 = 36 + 8 = 44g/Mol

Reaction

C3H8 + 5O2 --> 3CO2 + 4H2O

3CO2 = 6.39g

Required C3H8 = (6.39/(44 x 3)) x 44 = 2.13g  

Iron is a solid, grey metal. Oxygen is a colorless gas. When iron and oxygen chemically combine , rust is made. Rust has a reddish brown color. Why does rust differ from iron and oxygen?

Answers

Because the formation of rust is a kind of chemistry reaction.
After chemistry reaction, compound with new properties is produced.
Of course, color is one of the new properties.
For example, if you put iron in colorless acid solution, a green solution is made.
This kind of chemisty reaction differs from physical reaction, for example, pigment with one color dissolves in liquid, a liquid with same color is made.
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