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vredina [299]
3 years ago
14

In order to determine the mass of an atom, you would add :

Chemistry
1 answer:
Yuri [45]3 years ago
8 0

Answer:

38 baby 4kt

Explanation:

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C2H2 + 2H2 → C2H6<br> How many moles of hydrogen are needed to produce 13.78 mol of ethane?
Scilla [17]

Answer:

27.56 moles

Explanation:

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3 years ago
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Answer D. Picture II shows a chemical change, because the same substance changes form

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5 0
2 years ago
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Show a correct numerical setup for calculating the
valkas [14]

0.25 moles of CO2 is present in 11 grams of CO2.

Explanation:

A mole represents the number of chemical entities in an element or molecule.

Number of moles of an element or molecule is determined by the formula:

The Number of moles (n) = weight of the atom given  ÷ atomic or molecular weight of the one mole of the element or molecule.

Themolar mass of one mole of carbon dioxide is:

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= 44 gram/mole

The given weight is 44 grams of carbon dioxide.

Putting the values in the equation,

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7 0
3 years ago
Which of the following affects the speed of a seismic wave?
scoray [572]

Explanation:

The speed of seismic waves is affected by the density of the underlying rock.

Seismic waves are elastic waves that transmits elastic energy from one point to the other.

These waves generally produced during an earthquake.

  • The higher the density of rock bodies, the faster the wave travels.
  • Rocks that are well packed with little to no void have a higher seismic velocity.
  • Where density of rock is low, the speed is also low
3 0
3 years ago
Consider the two electron arrangements for neutral atoms A and B. What is the atomic number of A?
Andreas93 [3]
Your answer is B: The outer electron of Adam B has moved to a higher energy state
8 0
3 years ago
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