Which of these are correct

Answer:

No se bro cual se la respuesta .......

Explanation:

lo siento(

Answer:

ok

Explanation:

Answer:

it will have 6 valence electrons

it will gain electrons

charge will be 2-

Answer

grese

Explanation:

Any liquid could absorb and release thermal energy. However, a refrigerant or a coolant absorbs heat and releases it to any area faster than any ordinary liquid such as water. So to complete the sentence: A refrigerant/cooler is a liquid that absorbs and releases thermal energy

Answer:

The correct answer is coolant.

Hope it helps. :)

Answer:

multiply

Explanation:

multiplacation

Answer:

answering this for points! Sorry! but its probably A OR C

Explanation:

Answer:

All except a

Explanation: I like math. Pls mark brainliest.

The two numbers presented in the options, B, C, and D give a sum of 445.2 grams. So the correct options are B, C, and D.

The number that is given as digits is established using significant figures. A significant depiction of numbers is carried by these digits. Frequently, significant numbers are employed in place of figures. By counting all of the values beginning with the first non-zero digit on the left, we may determine the number of significant digits. 13.56, for instance, has four significant digits.

The crucial or key digits that accurately represent the meaning of a certain number are known as the significant figures of that number. 7.864 contains four significant digits, for instance. These huge amounts give the accuracy of the numbers. Additionally, they are known as important digits.

Therefore, the correct options are B, C, and D.

Read more about significant figures, here

https://brainly.com/question/14804345

#SPJ2

Explanation:

1 mole Of atom = GAM

MG=24g

GAM of Mg=24g

Therefore 24g=mole

Not My answer But I saw That You needed it.

Credit zeeshanfazil

thank him for the answer!

Answer:

the answer is true

Explanation:

it's just true

Answer: Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

Explanation:

Answer:

0.25L or 250Ml

Explanation:

I am not that good but as far as my calculations this must be the answer

Answer:

C

Explanation:

Carbon has an electronegativity of 2.55, followed by Tin at 1.96, Silicon at 1.90 and the least electronegative would be Lead at 1.87.

Answer:

Carbon

Explanation:

Carbon has an electronegativity of 2.55, followed by Tin at 1.96, Silicon at 1.90 and the least electronegative would be Lead at 1.87

Answer:

On contact with ice, calcium chloride forms brine rapidly, which lowers the freezing point of water and melts snow and ice quickly. Calcium chloride forms brine faster than other ice melters because its hygroscopic properties actually cause it to attract moisture from its surroundings

Explanation:

HOPE IT WILL HELP YOU

Answer:

B₃Si

Explanation:

Let's take  break it down. From triboron silicide;

Tri - Three

Triboron - Three boron atoms

Silicide - Silicon (with an -ide suffix)

The formular is given as;

B₃Si

Answer:

[tex]\boxed {\boxed {\sf 4.20 *10^{24} \ atoms \ Al }}[/tex]

Explanation:

To convert from moles to atoms, we must us Avogadro's number: 6.022*10²³. This tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, it is atoms of aluminum.

We can use the number as a fraction.

[tex]\frac{6.022*10^{23} atoms \ Al}{1 \ mol \ Al}[/tex]

Multiply by the given number of moles: 6.98

[tex]6.98 \ mol \ Al *\frac{6.022*10^{23} atoms \ Al}{1 \ mol \ Al}[/tex]

The moles of aluminum will cancel.

[tex]6.98 *\frac{6.022*10^{23} atoms \ Al}{1 }[/tex]

The denominator of 1 can be ignored.

[tex]6.98 * {6.022*10^{23} atoms \ Al}[/tex]

Multiply.

[tex]4.203356*10^{24} \ atoms \ Al[/tex]

The original measurement of moles has 3 significant figures, so our answer must have the same.

For the number we calculated, that is the hundredth place. The 3 in the thousandth place tells us to leave the 0.

[tex]4.20 *10^{24} \ atoms \ Al[/tex]

There are about 4.20*10²⁴ atoms of aluminum in 6.98 moles.

Answer:

A

Explanation:

I just did this question in class:))

Answer:

[tex]55.1657[/tex] grams/mol of carbon is needed to react with hydrogen gas to produce 59.8 grams of acetylene (C2H2)

Explanation:

The molecular weight of acetylene is  26.04 g/mol

Molecular weight of carbon is equal to 12.011 g/mol

Two carbon atom produces one acetylene molecule.

Thus, 2 * 12.011 g/mol of carbon is used to produce  26.04 g/mol of acetylene,

Amount of carbon required to produce 59.8 grams of acetylene

[tex]\frac{2*12.011}{26.04} * 59.8 \\= 55.1657[/tex]grams/mol

[tex]55.1657[/tex] grams/mol of carbon is needed to react with hydrogen gas to produce 59.8 grams of acetylene (C2H2)

Answer:

A meteor shower are defined as the celestial event in which a meteor comes from one point in the sky and visible in night sky.

Meteors are also known as Shooting stars as they glow when enters in the Earth surface as glowing streaks, where tail point to the origin in the sky and face faces the Earth surface.

Meteor showers take place when meteoroids entering Earth's atmosphere.

Meteor showers can repeat themselves because it depends on the comet orbits which can take place at the same time each year.

Answer and Explanation:

Heating the magnesium metal is a physical change because after the process, the magnesium metal is still magnesium metal and no other substance is formed. When we heat the metal, we tranfer energy and the temperature is raised. It could include the melting of the metal, which is a change in the state of matter, but it is still a physical change because no chemical reactions occur.

Burning the magnesium metal is a chemical change because it involves the reaction with O₂ to form a different compound (a magnesium oxide).

Answer:

It traveled for 4 seconds at a distance of about 4.1 meters. With a velocity of 10%.

Explanation:

1. Nickel (II) Bromide

2. Iron (II) Oxide

3. Iron (III) Oxide

4. Tin (IV) Chloride

5. Lead (IV) tetrachloride

6. Tin (II) Bromide

7. Chromium (III) Phosphide

8. Iron (II) Fluoride

9. Gold (III) Chloride

I hope this helps. I'm more than 100% sure that all the answers except for number 7 are correct. I knew all of them off the top of my head except for this one. I hope the other answer has the correct answer for that one. Good luck and have a great day.

Answer:hey did you ever get an answer? I need it for this exam

Explanation:

Answer:

Calcium Carbonate base and Sulphuric acid.

CaCO3 and H2SO4

Answer:

Skeletal equation : Ca(OH)2 + H2SO4 ----> CaSO4 + H2O

Balanced equation : Ca(OH)2 + H2SO4 ---> CaSO4 + 2H2O

Hope it helps

Answer:

1kg= 1000 grams hope it helps

Answer:

Humdity would decrease hence temprature would do the same, hence tundra are called deserts at times.

Explanation:

If you keep on decreasing the temperature without changing the air's moisture content significantly, eventually you'll reach 100 percent relative humidity, and then water vapor will start to condense to form dew.

Dew Point. When the relative humidity reaches 100 percent, dew forms. Dew point refers to the temperature at which air reaches saturation by water molecules. Warmer air can hold more water molecules, and as that warm air cools, it loses water vapor in the form of condensation.

When relative humidity reaches 100 percent or is saturated, moisture will condense, meaning the water vapor changes to liquid-vapor. Thus, the saturation level of air is related to the air's temperature.

Learn more about relative humidity here https://brainly.com/question/21494654

#SPJ2

Answer:

Sexual reproduction involves male and female sex cells known as - Gametes

Explanation:

In sexual reproduction new organisms are produced from the fusion of a male sex cell with a female sex cell. This fusion of gametes is called fertilisation. Sex cells are also known as gametes. Male gametes are made by male reproductive structures. Female gametes are made by female reproductive structures.

Answer:

true

Explanation: