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Otrada [13]
3 years ago
8

Which is an unnecessary rule for writing chemical formulas?

Chemistry
1 answer:
balandron [24]3 years ago
7 0
The correct answer are

identify the positive ion and charge
balance the charges
identify the negative ion and charge
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What happens to an atom if it loses an electron?
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Answer:

When an atom loses electron(s) it will lose some of its negative charge and so becomes positively charged. A positive ion is formed where an atom has more protons than electrons. In the opposite case when an atom gains electron(s) it becomes negatively charged (more electrons than protons).

Explanation:

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When a scientist uses reasoning to explain or interpret the things they observe
Kipish [7]

Answer:

Inferring is when a scientist uses reasoning to explain or interpret the things they observe

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An experiment applies heat to a substance and produces a gas that is a new and different substance. Choose the true statement.
bearhunter [10]
Well if the change is reversible then it is a physical change, but if not then it is a chemical change.
4 0
3 years ago
A sample of gas has an initial pressure of 1.5 atm, an initial volume of 3.0 L, and an initial temperature of 293K. If the final
Nataliya [291]

Answer:

1.9 L

Explanation:

Step 1: Given data

  • Initial pressure (P₁): 1.5 atm
  • Initial volume (V₁): 3.0 L
  • Initial temperature (T₁): 293 K
  • Final pressure (P₂): 2.5 atm
  • Final volume (V₂): ?
  • Final temperature (T₂): 303 K

Step 2: Calculate the final volume of the gas

If we assume ideal behavior, we can calculate the final volume of the gas using the combined gas law.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

V₂ = P₁ × V₁ × T₂ / T₁ × P₂

V₂ = 1.5 atm × 3.0 L × 303 K / 293 K × 2.5 atm = 1.9 L

6 0
3 years ago
The elements potassium (K), Calcium (Ca), and Krypton(Kr) are all part of the same __________ on the periodic table. A) Diagonal
Pavel [41]
The answer is C, I believe.
6 0
3 years ago
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