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erik [133]
4 years ago
13

What are two things that characterize the practice of science

Chemistry
1 answer:
MAVERICK [17]4 years ago
6 0
The experiments and safety rules.
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The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows: 2C8H18 (l) 25 O2(g) --> 16 CO2
Svet_ta [14]
The ratio of mole number of the reactants and products is equal to the coefficients. So the answer is a. 18.75 mol. b. 35.1 g. c. 1.38 * 10^5 g.
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3 years ago
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How many moles of acetylene are needed to completely react with 16.5g of CO2
kykrilka [37]

Answer:

0.375 mols

Explanation:

  1. Relative atomic mass Ar of C=12×1=12
  2. Relative atomic mass Ar of O=16×2=32
  3. Realitive formula mass Mr is 12+32=44

mol:mass

1 : 44

x :16.5

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5 0
3 years ago
Why is a magnetic field a vector quantity?
Alik [6]

Answer:

A

Explanation:

a vector quantity must have a direction. without a direction the value is called a scalar quantity

ie: velocity is a vector because it is how fast an object moves in a certain direction. speed is a scalar because it is how fast an object moves regardless of direction

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3 years ago
Im literally gonna cry . what is this
Vlad1618 [11]
Ok I will!!!!!!!!!!!
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What are two methods used to help identify the species of insect from the eggs on
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<h2>The two different methods to help identify the species of insects from the eggs on human remains are by using a small paint brush dipped in water and the other way is by using forceps.</h2>

Explanation:

<h2>mark as brainliest </h2>
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