HELP PLEASE!!!! WILL MARK BRAILIEST
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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:

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:

It will condense.

Hope it helps,

Please mark me as the brainliest

Thank you

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:

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:

noble gases from what i learnt

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

Answer:

Digestive

Explanation:

Answer:

primary

Explanation:

Answer:

yes

Explanation:

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:

make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.

Explanation:

A chemical reaction can be balanced by multiplying each side with suitable integers such  that the number of each element in the reaction must be equal number on both side.

According to the law of conservation of mass for  a chemical reaction, the total mass in the reactant side is equal to the total mass in the product side. Thus, a balanced chemical equation represents the perfect stoichiometry for each reactants and products.

The number of each elements in both side have to be equal in number. If they are unequal on both side, we can balance the reaction by multiplying with suitable integers.

Lets have one example. Consider the given reaction.

[tex]\rm CH_{4} + O_{2} \rightarrow H_{2}O + CO_{2}[/tex]

Here, 4 H are in left side and only 2 in right side. Similarly number of oxygen also not balanced.

The balanced equation requires a coefficient of 2 for water and 2 for oxygen in reactant thus, it can be written as:

[tex]\rm CH_{4} + 2O_{2} \rightarrow 2H_{2}O + CO_{2}[/tex]

To find more on balanced reactions, refer here:

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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: 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:

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.

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:

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Explanation:

Answer:

utcluclult

Explanation:

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Answer:

no WAYYYYYYY ITS SO EASY!!111!11

Explanation:

Answer:

23 g sodium

Explanation:

In chemistry, one mol (1mol) of a substance equals Avagadro's number or constant (6.02 × 10^23 atoms/particles/molecules).

According to this question in which the mass of different elements were given, the mass of the element that equals 6.02 × 10^23

Using the formula; mole = mass/molar mass

- Sodium = 23g/23g/mol = 1mol

- Krypton = 42g/84g/mol = 0.5mol

- Carbon = 24g/12g/mol = 2mol

- Pottasium = 78g/39g/mol = 2mol

Therefore, from the above illustration, it can be observed that only 23g of sodium contains 1 mol, hence, 23g sodium contains 6.02 × 10^23 atoms.

Answer:

0.00731 kg

Explanation:

Given that solution is a product of solute and solvent.

Hence, solution = solute * solvent

In this case, the solution is given as 0.950 grams = 0.00095 kilograms

solute is given as 130 grams = 0.13 kilograms

Hence to get the amount of solvent in kilograms, we have

Solution ÷ Solute => 0.00095 ÷ 0.13

= 0.0073076923

=> 0.00731 kilograms

Answer:

Mitochondria are the "powerhouses" of the cell, breaking down fuel molecules and capturing energy in cellular respiration. Chloroplasts are found in plants and algae. They're responsible for capturing light energy to make sugars in photosynthesis.

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.

0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.

The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas.

According to Ideal Gas Equation,

PV = nRT

Therefore, P ∝ T

P₁T₂ = P₂T₁

Given :

P₁ = ?

P₂ = 1.11 atm

T₁ = 30.0 C

T₂ = 15 C

Solving :

P₁ x 30 = 1.11 x 15

P₂ = 0.555 atm

Hence, 0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.

Learn more about ideal gas equation  here:

https://brainly.com/question/14826347

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Answer:

6.93 J/g C

Explanation:

5200=50 g (15 C)x

5200=750x

Also I just took the test

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:

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:

Synthesis :)

Explanation:

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:

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.