Answer:
True
Explanation:
Significant digits include non-zero digits (unless the zero is between two non-zero numbers)
In 12,785.000, there are 5 non-zero digits:
1 2 7 8 5
Step 1 : Write balanced chemical equation.
CaF₂ can be converted to F₂ in 2 steps. The reactions are mentioned below.
I]
II]
The final balanced equation for this reaction can be written as
Step 2: Find moles of CaF₂ Using balanced equation
We have 1.12 mol F₂
The mole ratio of CaF₂ and F₂ is 1:1
Step 3 : Calculate molar mass of CaF2.
Molar mass of CaF₂ can be calculated by adding atomic masses of Ca and F
Molar mass of CaF₂ = Ca + 2 (F)
Molar mass of CaF₂ = 40.08 + 18.998 = 78.08 g
Step 4 : Find grams of CaF₂
Grams of CaF₂ =
Grams of CaF₂ = 87.45 g
87.45 grams of CaF2 would be needed to produce 1.12 moles of F2.
The block location of an element tells the energy sublevel of an element.
<h3>What is block location of an element?</h3>
The term block location refers to the specific block in which an element is found in the periodic table. There are three blocks in the periodic table which are;
- s - block
- p - block
- d - block and
- f - block
The block location of an element tells the energy sublevel of an element.
Learn more about blocks:brainly.com/question/3580092
Answer:
The answer to your question is:
Explanation:
Ion is an atom that carries out a positive or a negative charge.
It is formed when an atom loses electrons. Yes, when an atom loses electrons then is formed a positive ion.
It is usually a nonmetallic element. Incorrect. Ions can be form by metallic or non metallic ions.
It has more electrons than protons. Yes, when an atom gains electrons is formed a negative ion.
It is formed when an atom gains protons. I think is incorrect, ions are formed when they gain or lose electrons not protons.
<u>Answer:</u> The value of for the given chemical equation is 0.0457.
<u>Explanation:</u>
Given values:
Initial moles of = 0.700 moles
Volume of conatiner = 3.50 L
The given chemical equation follows:
I: 0.700
C: -2x +2x x
E: 0.700-2x 2x x
Equilibrium moles of = x = 0.180 moles
Equilibrium moles of = 2x =
Equilibrium moles of = 0.700 - 2x =
Molarity is calculated by using the equation:
So,
The expression of for above equation follows:
Plugging values in above expression:
Hence, the value of for the given chemical equation is 0.0457.