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skad [1K]
3 years ago
15

NEED HELP ASAP!!!! PLEASE ANSWER THESE QUESTIONS FOR 25+ POINTS AND A BRAINLIEST, KEEP IN MIND THESE QUESTIONS ARE VERY IMPORTAN

T AND WILL DETERMINE MY GRADE!!!!(NO GUESSING, SPAMMING OR LINKS)
This is energy that is stored for later use.

kinetic energy
potential energy
mechanical energy
electromagnetic energy.

A ball rolling down the hill is an example of ___ energy.
1 point
Kinetic
Potential
Electrical
Sound

Requires two parents
1 point
Sexual reproduction
Asexual Reproduction

Small grains that contain a plant's male reproductive cells.
1 point
stamen
pollen
pistil
stigma

C, D , and E are collectively known as the ______.
1 point
Captionless Image
stamen
anther
sepal
pistil

Small leaf-like structures forming an outer circle at the base of a flower.
1 point
petals
sepal
stigma
pistil

The stalk that supports or holds up the anther is the
1 point
style
filament
ovary
pistil

A flower structure that encloses and protects ovules and seeds as they develop.
1 point
Petal
Ovule
Stigma
Ovary

the part of the ovary of seed plants that contains the female germ cell and after fertilization becomes the seed.
1 point
Ovule
Style
Stamen
.Pistil

Supports the stigma, serves as passageway for pollen
1 point
Anther
Style
Stem
Ovule

Renewable energy resources are?
1 point
A resource that cannot be readily replaced by natural means on a level equal to its use.
Invisible resources
Renewable resources that can be naturally restored.
All the above

Coal and oil are?
1 point
Non-Renewable energy resources
Renewable energy resources
None of the above

Bio-fuel and geothermal energy are examples of?
1 point
Non-renewable energy resources
Hydro energy
Renewable energy resources
None of the above

What is the name of flower part #10 ?
1 point
Captionless Image
sepal
pollen tube
filament
stigma

Which of the following is NOT a Natural Resource?
1 point
Coal
Paper
Solar
Wind

What is the disadvantage of using non-renewable resources?
1 point
They have a large carbon footprint.
They can all be used up over time.
They can lead to global w
Chemistry
1 answer:
ladessa [460]3 years ago
3 0

Answer:

1) d

2) a

3) a

4) b

5) d

6) b

7) d

8) a

9) b

10) d

11) a

12) b

13) b

14) b

15) c

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Which of the following are strongly hydrogen bonded in the liquid phase? A) nitrilesB) esters C) secondary amides D) acid chlori
-Dominant- [34]

Answer: Option (C) is the correct answer.

Explanation:

Chemical formula of a secondary amide is R'-CONH-R, where R and R' can be same of different alkyl or aryl groups. Here, the hydrogen atom of amide is attached to more electronegative oxygen atom of the C=O group.

Therefore, the hydrogen atom will be more strongly held by the electronegative oxygen atom. As a result, there will be  strongly hydrogen bonded in the liquid phase of secondary amide.

Whereas chemical formula of nitriles is RCN, ester is RCOOR' and acid chlorides are RCOCl. As no hydrogen bonding occurs in any of these compounds because hydrogen atom is not being attached to an electronegative atom.

Thus, we can conclude that secondary amides are strongly hydrogen bonded in the liquid phase.

6 0
3 years ago
Which of these statements is not true about chemical reaction rates
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Answer: The statement (B) is not true about chemical reactions.

Explanation:

A chemical reaction rate is affected by the several factors few of which are temperature, concentration of reactants, surface area etc.

In a chemical reaction, if temperature is increased then the rate of reaction will increase because it will increase the average kinetic energy of the reactant molecules. Thus, large number of molecules will have minimum energy required for an effective collision.

It is known that increasing the amount of reactants will increase the rate of reaction.

Therefore, rate of reaction will change if concentration or temperature is changed.

Hence, the statement (B) is not true about chemical reactions.

6 0
3 years ago
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Which of the following is true of science? (2 points)
Tju [1.3M]

Answer:

It is based on testable and replicable evidence.

7 0
2 years ago
Which of the following is not a conjugate acid-base pair?
-Dominant- [34]

Answer:

A. H3O+/OH−

Explanation:

A conjugate acid-base pair are a pair of molecules that differ in 1 H⁺

A. The conjugate pair of H₃O⁺ = H₂O not OH⁻

B. The conjugate pair of NH₄⁺ is NH₃

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D. The conjugate pair of H₂SO₃ is HSO₃⁻

That means right option, that is not a conjugate acid-base pair, is:

<h3>A. H3O+/OH− </h3>

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3 years ago
When the reaction mixture is worked-up, it is first washed three times with 5% sodium bicarbonate, and then with a saturated nac
Ann [662]

Solution:

After the reaction of mixture is worked-up Washing three times the organic  with sodium carbonate helps to decrease the solubility of the organic layer into the aqueous layer. This allows the organic layer to be separated more easily.

And then the reaction washed by saturated NACL we have The bulk of the water can often be removed by shaking or "washing" the organic layer with saturated aqueous sodium chloride (otherwise known as brine). The salt water works to pull the water from the organic layer to the water layer.

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