Why is the total mass always conserved in a chemical reaction? Be sure that your explanation includes the discussion of atoms and bonds.

Answers

Answer 1

Answer: Conservation of mass means that mass can not be created and even destroyed. This hold true with energy. During a chemical reaction, atoms were never created during the process. Also, during the process they were not destroyed. Atoms just change in form, connect to a different configuration or made into smaller or larger molecules but never created or destroyed.

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Which reaction type? *combination (synthesis)
combustion
decomposition
single replacement
double replacement

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Single replacement.

Mg replaces the H in HCl to become MgCl2.

The pH of a solution can be calculated using which formula?

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Answer:The pH is the negative log of H+

Explanation:a p e x

There are quite a few relationships between [H+] and [OH−] ions. And because there is a large range of number between 10 to 10-15 M, the pH is used. pH = -log[H+] and pOH = -log[OH−]. In aqueous solutions, [H+ ][OH- ] = 10-14. From here we can derive the values of each concentration.

-log[H+ ] + -log[OH- ] = -log[10-14]

pH + pOH = 14

So pH = 14 – pOH and pOH = 14 – pH

What two forces act in the nucleus to create a 'nuclear tug of war'?

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In Nuclei, There are 2 forces. 1 force is electrostatic and acts as repulsion between 2 protons. The other is force of attraction called Nuclear force between 2 neutrons. This nuclear force is a short range force and is so strong that it negates the effect of the force of repulsion between the protons and helps bind the nucleus together. Hope this helped :D

What subatomic particles have a charge? (pick all that apply)Protons
Neutrons
Electrons

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Answer:

Protons- positive

Electrons - negative

Explanation:

In which of these situations is convection most likely the main form of heat transfer?Warm air from a heater on the first floor of a house moves to the upper floors.

The sides of a metal pan become hot when the pan is placed on a stove burner.

A person gets a sunburn from lying on the beach too long.

An ice cube melts when a person holds it in his hand.

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In the first situation: the mechanism of covection is the main form of heat transfer when warm air from a heater moves around and upward.

In the case of the metal pan the mechanism of heat transfer is conduction.

In the case of sunburn the mechanism is radiation.

In the case of an ice cube melting in a hand, conduction is the most important mechanism.

Answer:

An ice cube melts when a person holds it in his hand.

Explanation:

What is the geometry of the HBr molecule?
What is the geometry of the SF₂ molecule?

Answers

HBr is a linear molecule at 180degrees

SF2 is a trigonal planar at 120degrees.

Other Questions

When lithium reacts with bromine to form the compound LiBr, each lithium atom:(1) gains one electron and becomes a negativelycharged ion(2) gains three electrons and becomes a negativelycharged ion(3) loses one electron and becomes a positivelycharged ion(4) loses three electrons and becomes a positivelycharged ion

In the pie chart below, which of the following represents the amount of Earth's water located in the oceans?A pie chart with part A representing 2%, part B representing .8%, part C representing .2% and part D representing 97%. A only A and B C only D only

What is special about nitrogen? and what is it main function?

The cheetah has been clocked at 112 km/Hr. What speed would this be in ft/sec?