Answer:
NaCl
The overall ionic formula for a compound must be electrically neutral, meaning it has no charge.
When writing the formula for the ionic compound, the cation comes first, followed by the anion, both with numeric subscripts to indicate the number of atoms of each.
ions are formed when metals are combined with nonmetals
The equation that best represents the addition of potassium sulfate to water is 
<h3>Dissolution of potassium sulfate in water</h3>
When potassium sulfate is dissolved in water, it dissociates into its cation and anion according to the following equation:
The positive ions are 2 moles of potassium ions while the negative ion is a mole of sulfate ion.
More on potassium sulfate can be found here: brainly.com/question/15405465
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Answer:
- 0.36 m/s.
Explanation:
- For the reaction: <em>a + 2b → c,</em>
<em>∵ The initial rate of the reaction = - δ[a]/δt = - 1/2 δ[b]/dt = 0.180 m/s.</em>
∴ The initial rate of the reaction = - 1/2 δ[b]/dt = 0.180 m/s.
∴ - 1/2 δ[b]/dt = 0.180 m/s.
<em>∴ δ[b]/dt </em>= (- 2)(0.180 m/s) =<em> - 0.36 m/s.</em>
Answer:
Empirical formula is CH₃.
Explanation:
Given data:
Mass of carbon = 120 g
Mass of hydrogen = 30.3 g
Empirical formula = ?
Solution:
Number of gram atoms of C = 120 g / 12 g/mol = 10
Number of gram atoms of H = 30.3 g / 1.008 g/mol = 30.06
Atomic ratio:
C : H
10/10 : 30.06/10
1 : 3.06
C : H = 1 : 3
Empirical formula is CH₃.
Answers are:
1) It can be separated by physical methods.
2) It can appear different from different sources.
3) It cannot be described by a chemical symbol or formula.
Mixture is composed of at least two substances.
Pure substance is made of only one type of atom (element) or only one type of molecule (compound), mixtures and solutions are made from two or more types of pure substances.
Mixtures can be separeted y physical means, while compounds cannot.
There is a definite recipe to make each mixture, because composition of mixture can vary.
