Chemistry College

30 POINTS HELPP PLEASE

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30 POINTS HELPP PLEASE

Answers

Answer 1

1: selective breeding

2:traits

3: crop species

4: domestic

5: diverse

6: artificial

7: uniform

in your opinion if the answer is correct please like n mark MI s brain list

Related Questions

what is this element

Answers

Answer:

Oxygen

Explanation:

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

Number of electrons = 8

Number of protons = 8

Number of Neutrons = 8

Name of element =?

Next, we shall determine the atomic number of the element. This can be obtained as follow:

The atomic number of an element is simply defined as the number of protons in the atom of the element. Mathematically, it is expressed as:

Atomic number = proton number

From the question given above,

Number of protons = 8

Therefore,

Atomic number = 8

Comparing the atomic number of the element (i.e 8) with those in the periodic table, we can conclude that the element is oxygen since no two elements have the same atomic number.

The the balanced equations to: solutions of lithium sulfate and potassium phosphate are mixed together to make lithium phosphate and potassium sulfate

Answers

Answer:

[tex]3Li_2SO_4+2K_3PO_4\rightarrow 2Li_3PO_4+3K_2SO_4[/tex]

Explanation:

Hello!

In this case, when lithium sulfate and potassium phosphate solutions are mixed to yield lithium phosphate and potassium sulfate, the following chemical equation comes up:

[tex]Li_2SO_4+K_3PO_4\rightarrow Li_3PO_4+K_2SO_4[/tex]

However, as atoms are not balanced we apply the inspection method to obtain:

[tex]3Li_2SO_4+2K_3PO_4\rightarrow 2Li_3PO_4+3K_2SO_4[/tex]

Best regards!

What's the charge on Ni in the compound NiCi3? *
+1
+2.
+3
- 7
-2.
3
you can't tell

Answers

Answer:

+3

Explanation:

Chlorine is anion with a -1 charge. But they are three chlorine atoms.

-1 * 3 = -3

So they have a -3 charge.

So to balance the compound, the nickel has to be a cation with a +3 charge.

-3 + 3 = 0

Furthermore, a chemical bond always has a 0 charge. Remember that.

Hope it helped! Rate my answer a 5 star if correct.

Useful:
Harmful:
2. Give an example of how Bacteria can be useful and harmful to man.​

Answers

Answer:

normal flora useful

Explanation:

protect the skin

pLeeease help im so tired and i need to SLEEP. Answer the 1s you know
1. How does the mechanical energy of a ball that is starting to fall compare to its total energy just before it hits the floor?
2. When you stand in sunlight, what form of energy is emitted by the sun?
3. An eye doctor wants to design reading glasses that also function as sunglasses. Should the eye doctor use a reflective-transparent material or a reflective-opaque material for the lenses? Support your claim.

Answers

1. when the ball is just starting to fall, it has high potential but low kinetic energy. when it hits the floor, it has high kinetic but low potential energy
2. heat energy
3. reflective-transparent would be best, as they can reflect some light while let other light through, reflective-opaque would be useless in any circumstances because no light at all would be able to get through

If 2.35 L hydrogen gas react with nitrogen gas to form nitrogen trihydride, how many grams of nitrogen will be needed for the reaction to be completed?



0.98 g


0.49 g


21.93 g


1.47 g

Answers

Answer:

1.47 g

Explanation:

help put them in order

Answers

Answer:

hello

Explanation:

hi

I NEED THIS TODAY, PLEASE HELP.
Write the following elements in decreasing ionic size. Li+, C4+, F-, O2-

70 POINTS

Answers

Answer:

Li+, C4+, O2-, and then F- They're written in decreasing ionic size.

Explanation:

Ionic size means the same thing as ionic radius.  Furthermore, Ionic radius is the distance away from the central atom. Ionic radius increases going from top to bottom and decreases across the periodic table.

Lithium is in the 1st family/group with a charge of +1.  So it has the biggest ionic radius.

Carbon is in the 4th family/group with a charge of +4. So it has a smaller ionic radius than Lithium.

Oxygen is in the 6th family/group with a charge of -2.  So it has a smaller ionic radius than Carbon.

Lastly, Fluorine is in the 7th family/group with a charge of -1. So it has a smaller ionic radius than Oxygen.

true or false
1. resistance provides friction to electron movement
2.high resistance will speed up electron movement
3.a circuit is an open path for electrons to move through
4. in a circuit, electrons move from the low voltage area to the higher
5. in a circuit, the light bulb is called the load

Answers

Answer:1

Explanation: friction is showing us how in the past

question: convert 22.63 miles of oxygen to volume

very urgent

Answers

Answer:

506.912 L

Explanation:

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

Number of mole of O₂ = 22.63 moles

Volume of O₂ =?

Recall:

1 mole of a gas occupy 22.4 L at STP.

With the above information, we obtained the volume occupied by 22.63 moles of O₂ as follow:

1 mole of O₂ occupied 22.4 L at STP.

Therefore, 22.63 moles of O₂ will occupy = 22.63 × 22.4 = 506.912 L at STP.

Thus, 22.63 moles of O₂ is equivalent to 506.912 L.

Which of the following statements about sidestream smoke is not true?

a. It is the smoke that a smoker inhales from a cigarette.

b. It is dirtier and has a different chemical makeup than mainstream smoke.

c. It is the smoke that people around the smoker inhale.

d. It is the smoke that results from the burning end of a cigarette.

Answers

Answer: a

Explanation: the smoker actually exhales the sidestream smoke

I promise it's easy points

Describe the life cycle of a star what determines the path a star could take.​

Answers

A stars life cycle is determined by its mass it depends on the path so if it’s a large or small there life cycle

How many moles are in 99.5 grams of titanium? Round your answer to the nearest hundredth. Be sure to include units.

Answers

Answer:

1000

Explanation:

99.5/ 47.87= 2.078≈2.1 mole
Other Questions
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