Please help me with 9 and 10 don’t send me a link please tell me here

Answer:

Explanation:

The coefficient is the number in front of a substance that indicates how many molecules or atoms are. For example, when we see 5He, it shows that there are 5 atoms of helium. When we see 5H₂O, it indicates that there are 5 molecules of water, each having 2 atoms of hydrogen and 1 atom of oxygen, so a total of 10 hydrogen atoms and 5 oxygen atoms.

Answer:

It will condense.

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Answer:

okay so lets say i drop a ball that weighs 2 pounds off a building and a ball that ways 1 pound off the building at the same time the lighter ball would hit the ground first because its lighter and so they heavier it is the slower it drops the lighter it is the faster it drops

Explanation:

Answer:

Hello, I don't really have an actual answer, but I was hoping you could explain it to me? I have the same project and I am kind of confused.

Explanation:

Thank you and have a great day :)

Answer: The mitochondria, as bacteria, only wanted to rob the host cells of their energy and then leave them to die. But the bacteria soon realized the benefit of working together with simple cells. The simple cells provide them with antioxidants to protect them from free radicals and toxic reactive oxygen species that the mitochondria generate as a byproduct of energy production.

Hope dis helps!

:)

Answer:

The pressure inside the bottle is 92.678 atm.

Explanation:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case:

Replacing:

P* 0.500 L= 2.07 moles* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] * 273 K

Solving:

[tex]P=\frac{2.07 moles* 0.082 \frac{atm*L}{mol*K} * 273 K}{0.500 L}[/tex]

P= 92.678 atm

The pressure inside the bottle is 92.678 atm.

Answer:

noble gases from what i learnt

Answer:

eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeiiiiiieeeeeemmmmmmmmiemeeeeeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiimiiiimmmmmmmmmmmmmmmmmmmiimmiimiiiiiiiimiiiiiimmii

Explanation:

Answer:

primary

Explanation:

Answer:

2C2H18 + 13O2 → 4CO2 + 18H2O (I balanced your equation)

Products - CO2 & H20

Answer:

A, Venus.

Explanation:

Temperatures reach up to 460° C on a regular basis.

Answer:

A good hydrogen ion acceptor

Answer:

They can check if one of the bullets is gone if the gun was fully loaded or they can see if there is any particles of gun powder on the gun. I may be wrong.

The molarity of a substance is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:

[tex]Molarity = \frac{mole}{volume }[/tex]

From the question given above, the following data were obtained:

Molarity of KCl = 2.45 M

Mole of KCl = 0.5 mole

The volume of KCl needed can be obtained as follow:

[tex]Molarity = \frac{mole}{volume }\\\\2.45 = \frac{0.5}{Volume }[/tex]

Cross multiply

2.45 × Volume = 0.5

Divide both side by 2.45

[tex]Volume = \frac{0.5}{2.45}\\[/tex]

Therefore, 0.20 L is needed to make the solution.

Learn more: https://brainly.com/question/23816507

Answer:

6.93 J/g C

Explanation:

5200=50 g (15 C)x

5200=750x

Also I just took the test

Answer:

The grey squirrel.

Explanation:

This is your answer because the white one would have a harder time to blend in with the tree's and the environment, whilst the grey one is better suited for its environment better due to the fact that it can blend in with the trees, and hide better.

Answer:

Environment Secretary can refer to:

Cabinet Secretary for Rural Affairs and the Environment, Scotland

Secretary for the Environment, Transport and Works, Hong Kong

Secretary of State for Environment, Food and Rural Affairs, United Kingdom

Secretary of the Environment (Mexico)

Answer:

424.6g

Explanation:

Density is a measure of a substance's mass over its volume.

d = m/v

we can rearrange this equation to solve for mass algebraically.

dv = m

We can then substitute the given values for our variables in the problem and solve for our answer.

22mL(19.3g/mL)= 424.6g

Explanation:

yes, chlorine and hydrogen form a polar covalent bond. Chlorine has a quantity of 7 electrons and hydrogen has only 1 electron, for this reason an unequal bond will form, that is, it will be uneven in distribution.

✧◝(⁰▿⁰)◜✧

Answer:

1656.12grams

Explanation:

To calculate the mass of a substance in a particle, we need to calculate the number of moles (n).

n = nA × 6.02 × 10^23

nA = 8.98 x 10^24 particles

number of moles = 8.98 x 10^24 ÷ 6.02 × 10^23

n = 8.98/6.02 × 10^ (24 - 23)

n = 1.492 × 10^1

n = 14.92moles of CaCl2

Molar Mass of CaCl2 where Ca = 40g/mol, Cl = 35.5g/mol

CaCl2 = 40 + 35.5(2)

= 40 + 71

= 111g/mol

Using mole = mass/molar mass

mass = molar mass × mole

mass = 111 × 14.92

mass = 1656.12grams.

Answer:

different

Explanation:

A chemical reaction may be defined as the process or method by which a substance undergo a change in their structure chemically when reacting with some other substance and acquiring the property of both or sometimes forms a new substance. It leads to the chemical transformation of the chemical substance to some another substance.

The properties of the new substance formed is different form the parent substance before the reaction.

Thus, when chemical reaction occurs, the properties of the substances before the reaction and after the reaction takes place is different.

Answer:

Explanation:

1.5 moles to molecules

1 mole = 6.02 x 10²³ molecules

1.5 moles = 6.02 x 1.5 x 10²³ molecules

= 9.03 x 10²³ molecules

2 )

Convert 1.204x10²⁴ molecules to moles

6.02 x 10²³ molecules  = 1 mole

1.204x10²⁴ molecules = 1.204x10²⁴ / 6.02 x 10²³ moles

= 2 moles

3 ) Convert 1.5x10^20 molecules to moles

6.02 x 10²³ molecules  = 1 mole

1.5x10²⁰ molecules = 1.5x10²⁰ / 6.02 x 10²³ moles

= .25 x 10⁻³ moles

= 2.5 x 10⁻⁴ moles .

4 )

Convert 0.35 moles to molecules

1 moles = 6.02 x 10²³ molecules

.35 mole = 6.02 x .35 x 10²³ molecules

= 2.1 x 10²³ molecules.

5 )

Convert 15 moles H₂O to atoms

1 moles = 6.02 x 10²³ molecules

15 moles = 15 x 6.02 x 10²³ molecules

= 90.3 x 10²³ molecules of water

1 molecule of water has 3 atoms in total

90.3 x 10²³ molecules of water  = 90.3 x 3 x 10²³ atoms

= 270.9 x 10²³ atoms .

6 )

0.75 moles CaSO₄ to atoms

1 moles = 6.02 x 10²³ molecules

.75 moles = .75 x 6.02 x 10²³ molecules of CaSO₄

= 4.515 x 10²³ molecules of CaSO₄

1 molecule of CaSO₄ = 6 atoms

4.515 x 10²³ molecules of CaSO₄ = 6 x 4.515 x 10²³ atoms

= 27.09 x 10²³ atoms .

Answer:

How can we decide which geologic process formed the channel on Mars? Students figure out: The channel on Mars was probably formed by water. The rover Curiosity found rocks near the channel that were made up of many smaller rocks.

Explanation:

Hope it helps! Correct me if I am wrong :>

Can you please mark me as brainlest?

Answer:Water

Explanation:

Water could have formed the channel on Mars because some of the rocks that scientists studied from the earth looks similar to the rocks on Mars.

Answer:

553.5 cm3

Reason:

1 mL = 1 cm3

Answer:

LD50 is the amount of a material, given all at once, which causes the death of 50% ... LD100 Lethal dose for 100% of the animal test population ... Researchers can do the test with any animal species but they use rats or mice ... quoted as parts per million (ppm) or milligrams per cubic metre

Explanation: hope this helps :)

Answer:

yes

Explanation:

Answer:

1 year- 1 mole

time in general- amount of matter

1 second- 1 atom/ particle

Answer:

1 Year => 1 Mole

Time in General => Amount of Matter

1 Second => 1 Atom/Particle

Explanation:

These pairs make the most sense.

Hope it helps!!!

Answer:

Synthesis :)

Explanation: