Pleaseeee help meeeee

Answer:

Diagram of the nuclear composition and electron configuration of an atom of barium-138 (atomic number: 56), the most common isotope of this element. The nucleus consists of 56 protons (red) and 82 neutrons (blue).

Answer:

The answer is the last one

Explanation:

1. Give

2.me

3. Brainliest

4.please

Answer:

Explanation:

I’m not sure friend but my best guess would be 2 and 4. If it’s wrong I’m sorry but that seems the most reasonable to me. Good luck :)

Answer:

just the second

Explanation:

Answer:

both are changes in state, and both conserve mass. Hope it helps and please have a good day or night

Answer:

2.7 moles of neon contain 16.3 × 10²³ atoms of neon.

Explanation:

Given data:

Number of moles of neon = 2.7 mol

Number of atoms of neon = ?

Solution:

We will use using Avogadro number to solve given problem.

"It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance"

The number 6.022 × 10²³ is called Avogadro number.

1 mole of neon = 6.022 × 10²³ atoms of neon

2.7 mole of neon × 6.022 × 10²³ atoms of neon / 1 mole of neon

16.3 × 10²³ atoms of neon

Thus, 2.7 moles of neon contain 16.3 × 10²³ atoms of neon.

Answer:

it is A

Explanation:

Answer:

5 grams < 9.4 grams < 0.35 kilograms

Explanation:

Kilograms (Kg) and grams (g) are both units of measurement for MASS quantity. However, these units are not the same as they vary in magnitude. The kilograms is bigger unit of measurement than the grams. 1000grams makes 1kilograms.

According to this question, 0.35 kilograms 9.4 grams and 5 grams are to be arranged in ascending order i.e. from smallest to largest. First, we need to change all the units to the same.

We change 0.35kg to g

Since 1000g = 1kg

Then, 0.35kg = 0.35 × 1000

= 350g.

Rearranging the values, we have:

5 grams < 9.4 grams < 0.35 kilograms

Answer:

Liquid

Explanation:

The substance had appears to have a fixed volume but took the shape of the bottle it was transferred to.

If the substance doesn't have the same volume, the answer would be gas.

Given parameters:

Density of the rock = 2.2g/cm³

Volume of rock = 66.5mL

Unknown:

Mass of the rock = ?

Solution:

Density is the mass per unit volume of a body. It is mathematically expressed as shown below;

          Density  = [tex]\frac{mass}{volume}[/tex]

So;

         Mass = Density x Volume

We need to take the given parameters to the same unit before we solve;

              convert mL to cm³

                 1mL  = 1cm³;  66.5mL is the same as 66.5cm³

Now solve;

          Mass  = 2.2 x 66.5  = 146.3g

The mass of the rock is 146.3g

Answer:

it s not on periodic table this is not real element

Explanation:

Answer:

Talc

Explanation:

Talc only has a hardness of one on the Moh's scale of hardness. This translates into a very soft material, which results from its layered nature. Naturally, this substance is hydrophobic (dislikes water), and tends not to absorb water, therefore giving some of its favourable water-resistant characteristics.

Answer: Neutrons

Explanation:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.

Answer:

neutrons

Explanation:

isotopes has the same proton number but different nucleon number because there's different numbers of neutrons in isotopes

Answer:

1. from      2. to

Explanation:

Answer:

9.11 x 10 -28 grams

Explanation:

Answer:

D. The net electrical charge of the Earth.

Explanation:

I remember from middle school. The other three options affect the gravitational force.

The gravitational force between the earth and the sun is dependent on the mass of these two objects as well as the distance between the earth and the sun. Thus, option D is the correct answer.

Gravitational pull is referred as a force of attraction beared by the planetary objects. Gravity is responsible for the revolution of planets around the sun in their fixed orbits.

Gravitational pull is important as it keeps the earth revolving around the sun from a safe distance. It holds the earth in position and thus supports the life on earth. Gravity is responsible for optimum atmosphere on earth.

The formation of celestial bodies is also under the influence of gravitational pull. Gravitational force thus is consired as a fundamental force that govers all the celestial bodies.

Gravitational pull is therefore important for the life on earth.

Learn more about gravitational pull, here:

https://brainly.com/question/3009841

#SPJ2

Answer: H2O has 8 electrons, GeBr4 has 32 electrons, and RbHO has 37 electrons.

Hope this helped! :)

Answer:

3 g/cm3

Explanation:

d=m/v

=45/15

= 3 g/cm3

Answer:

2.46621 cm

Explanation:

i used the formula p = m/V

Answer: Wheel and axle

Explanation:

Wheel and axle is the best answer. Technically that's not the primary part that steers a vehicle though. A pulley is in the engine and I've never heard of wedge and first class lever. The question isn't too clear, but yea, I would pick ii if I was in your spot.

Answer/Explanation:

Tentative means that something is uncertain. So if some aspect of science is described as "tentative" it probably means that there is some evidence to support a hypothesis, but there is more work to be done to be sure about the statements being made.

You may also see these reports described as "preliminary", as they are acknowledging the work is not complete

Answer:

cancerous

Explanation:

Answer:

there is about 6 zeros in 1,000,000

Answer:

6   0's

Explanation:

happy bday #LibraGurl

Answer:

F

Explanation:

has 7 valence electrons , it really want to hog another electron to reach an octet.

therefore it has a highest electronegativity

Answer:

The correct answer is A.

Explanation:

The acids with hydrogen atoms in them are the ones that dissolve best in water and when they do, they get diluted, raising their pH level by releasing hydrogen ions (H+) into the solutions.

So when acids get dissolved in water, positively charged hydrogen atoms are released.

The answer is A.

I hope this helps.

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass of iron (II) oxide = 76.6 g

volume = 12 mL

We have

[tex]density = \frac{76.6}{12} \\ = 6.3833333...[/tex]

We have the final answer as

Hope this helps you

Answer:

it 76.6

Explanation:

cause it is what it is

Answer:

A

Explanation:

With the given choices, A would be correct for this question.  But, both liquids and gases have particles that are far apart so that they can fill their containers.

Explanation:

B and C they are the pure substances

Elements are considered as  pure substances . Elements are mostly metals, non - metals and metalloids , so option C is right.

An element is a substance that cannot be broken down by non - nuclear reaction. Elements considered as a pure substance . All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds such as water, salt or crystals, baking soda amongst others are also grouped as pure substances.

An element is a fundamental item that cannot be easily broken in smaller pieces. There are about 100 elements ,each with it's own types of atom. Everything in universe contain an atom of at least on or more than one elements.

Elements are pure substances ,hence option C is correct.

To learn more about elements refer the following  link;

https://brainly.com/question/14347616

#SPJ2

Answer: energy

Explanation:hope this helps.

Answer:

Temperature

Explanation:

Answer:Option D

Explanation:i took the test

Answer:

-3

Explanation:

The charge of the ion is determined by the number of protons and the number of electrons.

Protons are a positive + charge.

Electrons are a negative - charge.

We have 7 protons and 10 electrons.

+7 charge

-10 charge

-10 + 7 = -3 charge

Answer:

gime fre points

Explanation:

fre points for me!