2 years ago

When a substance changes from a solid to a liquid, is a new substance made?

Chemistry

1 answer:

anygoal [31]2 years ago

6 0

Answer:

Explanation:

it means melting or fusion so yhe answer is no

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U-238 has _____ protons and 146 neutrons

qaws [65]

U-238
The number besides the U means its total molar mass. The molar mass of this element is 238
Molar mass= protons + neutrons
This means that 238= 146 + protons
Do 238 - 146
Answer is 92

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2 years ago

compared to maximum number of electrons that can occupy the d sublevel the max number of electrons that can occupy s sublevel

morpeh [17]

D-sublevel can occupy 10 electrons whereas s-sublevel can occupy 2 electrons...

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3 years ago

28. Which set of coefficients will balance this chemical equation?

Makovka662 [10]

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3 years ago

Which of the following is not true of a scientific theory?

Furkat [3]

Answer: a,b

Explanation: because a scientific theory is something that been thought of and tested multiple times.

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2 years ago

Solid silver chloride, AgCI(s), decomposes to its elements when exposed to sunlight Write a balanced equation for this reaction

Mrac [35]

Answer: The coefficient in front of AgCl when the equation is properly balanced is 2.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Decomposition is a type of chemical reaction in which one reactant gives two or more than two products.

Decomposition of silver chloride is represented as:

$2AgCl(s)\rightarrow 2Ag(s)+Cl_2(g)$

Thus the coefficient in front of AgCl when the equation is properly balanced is 2.

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3 years ago