Explain why the number of protons in an atom must always equal the number of electrons.

Answers

Answer 1

Answer:

Usually within an atom, the protons and electrons are equal to make the atom have a neutral charge.

However, there are cases in which the protons and electrons are different, such as Cations and Anions. Cations end up having a positive charge (less electrons than protons), and Anions end up having a negative charge (more electrons than protons).

I hope this helps!

Answer 2

Answer: For every negative theres a positive and for every positive there is a negative

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Brandy knows that chromosomes behave differently in meiosis and mitosis what do chromosomes do in meiosis but not in mitosis

Answers

Meiosis has two rounds of genetic and cellular division while Mitosis only has one. There are more complicated answers, so i dont know exactly how much info you need.

Density is a physical property of matter. Density does not change the identity of the substance; it just shows how close the particles of the substance are to each other.The density of a substance also does NOT Change If you change the amount of the substance. One gram of gold has the same density as 10,000 grams of gold,
What is the density of gold if you have 96.9 grams of gold and it takes up 5mL of space?
17.9 g/mL
103.199174 g/ml
50,000 g/ml
19.32 g/mL

PLS HELP AND IF YOU CAN PLEASE HELP ME ON MORE, thanks!

Answers

Answer:

The density of gold is 19. 38 $(g)/(mL)$

Explanation:

Density is defined as the property that matter, whether solid, liquid or gas, has to compress in a given space. In other words, density is a quantity that allows you to measure the amount of mass in a given volume of a substance. So, the expression for the calculation of the density is the quotient between the mass of a body and the volume it occupies:

$density=(mass)/(volume)$

Density, according to the International System of Units, is usually expressed in kilogram per cubic meter (kg/m³) or gram per cubic centimeter (g/cm³). Although it can also be expressed in any other unit of mass by volume.

In this case:

mass= 96.9 grams
volume= 5 mL

Replacing:

$density=(96.9 g)/(5 mL)$

density=19. 38 $(g)/(mL)$

The density of gold is 19. 38 $(g)/(mL)$ , that you could approximate the option 19. 32 $(g)/(mL)$

The volume of a gas at 99.0 kPa is 300.0 mL. If the pressure is increased to 188kPa, what will be the new volume?

Answers

Answer:

158.0 mL

Explanation:

We can solve this problem by using Boyle's law, which states that:

"For a fixed mass of a gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume"

Mathematically:

$p\propto (1)/(V)$

where

p is the pressure of the gas

V is its volume

The equation can be rewritten as

$p_1 V_1 = p_2 V_2$

where in this problem:

$p_1=99.0 kPa$ is the initial pressure

$V_1=300.0 mL$ is the initial volume

$p_2=188 kPa$ is the final pressure

Solving for V2, we find the final volume:

$V_2=(p_1 V_1)/(p_2)=((99.0)(300.0))/(188)=158.0$ mL

I will give brainliest!! Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationshops among reactants and products in chemical reactions?

a
quantitative analysis
b
entrophy
c
chemical kinetics
d
stoichiomentry

Answers

That would be D Stoichiometry.

Answer:

Explanation:

In your own words, discribe the purpose of useing a chemical equation

Answers

Answer:

Mmmm

Explanation:

What are some natural sources for cyanide

Answers

It can be found in cigarette smoke, plastic, cassava, Lima beans, and almonds

Cyanide is found in very many places, some we would never expect. Here's a list of what I know has traces of or has cyanide in it.

Paper.
Textiles.
Plastics.
Bug Killer (Cyanide gas is used to exterminate pests and vermin in ships and buildings)
Artificial Nail Remover.
Any sort of acetonitrile-based products.
It is used to remove gold from it's ore.
It is present in the chemicals used to make photographs.
Cigarette Smoke
Vehicle Exhaust
Spinach.
Bamboo Shoots.
Almonds.
Lima Beans.
Miscellaneous Fruit Pits.
Tapioca.

These are just what I know of, I'm sure there's many more.

Hope this helped! :)

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