Chemistry High School

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HELP ME ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer 1

Answer:

Digestive

Explanation:

Related Questions

What is the best way to statically charge an object,

Answers

Answer:Static electricity can be created by rubbing one object against another object.

Explanation: This is because the rubbing releases negative charges, called electrons, which can build up on one object to produce a static charge

How many moles of Iron (II) oxide are present in a 34.5 gram sample?

Answers

Answer:

0.609 Is the answer.

Explanation:

I hope this helped

Which radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time?
Pu-239
FR-229
Fe-53
P-32

Answers

Answer:pu-239

Explanation:

Pu-239 is regarded as the radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time

Disposal of radioactive nuclear waste is often regarded as a problem.

The waste sources are:

Nuclear power reactors Bomb-related nuclear material

Disposal of bomb-grade plutonium is often difficult.

The longer lived isotopes are:

Plutonium-239 whose t1/2 is 24,110 years, Plutonium-240 whose t1/2 is 6,540 years, Curium-245 whose t1/2 is 8,500 years. etc.

The storage of the longer lived elements is through containment for the next several thousand of years.

The control or management of radioactive waste is a hard, multifaceted procedure.

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Would the primary consumers, secondary consumers, or tertiary consumers have more total mass?

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Answer:

primary

Explanation:

Can someone help me please

Answers

True, False , and I think the last one is true

Match the items to use the analogy of time to the vocabulary of chemistry.

Answers

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!!!

Marcus wants to use two objects to compare the sizes of a proton and an electron. If he uses a basketball for a proton, which object would best represent an electron?
A
a pea
B
a bowling ball
C
a soccer ball
D
a beach ball

Answers

Answer:

A

Explanation:

what are particles that differ in number between isotopes

Answers

Answer:

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.

In plant cells, how are chloroplasts and mitochondria related?

Answers

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.

There are two suspects in a shooting investigation. Bullets are recovered from the crime scene. Both suspects own guns, and these guns have been seized by the police. How will the investigators check to see if one of these guns fired the found bullets?

Answers

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.

A low ph scale would indicate that the water is A. Neutral B. Basic C. Acidic

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I think the answer is C. acidic

What is the mass of 3.25 moles of sodium hydroxide (NaOH)?

Answers

Answer:

1 mole is equal to 1 moles NaOH, or 39.99711 grams.

Explanation:

Hope this helps have a nice day :)

The statement of the mass of sodium hydroxide (NaOH) is "130 g."

What is mass?

A substance is something to do with mass that takes up space. The mass of a compound is the total amount of atoms present in grams that make up a molecule. The grams is the unit of mass.

In order to determine the mass in grams, multiply moles of the substance value by its molar mass to convert moles into grams.

Mole to gram conversion factor,

[tex]=\;given \;mole\;.\;\frac{grams}{1\;mol}[/tex]

Mass of NaOH comes out to be,

[tex]=\;3.25\;mol\;.\;\frac{39.997\;g}{1\;mol}[/tex]

= 129.99 g

= 130 g

Hence the correct answer is 130 g.

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A closed flask contains gas at STP. If the temperature is raised to 400 K what will the pressure be in atm?

Answers

Answer:

The answer is 1.5 atm

Explanation:

Which mass is made up of 6.02x10^23 atoms? none of these 23 g sodium 42 g krypton 24 g carbon 78 g potassium

Answers

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.

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