3 years ago

What type of plant is thought to be the first plant?

Chemistry

2 answers:

Sergio [31]3 years ago

6 0

Angiosperms can produce flowers and fruits to aid in seed dispersal.

vladimir1956 [14]3 years ago

5 0

Answer:

Mosses

Explanation:

mosses are non-vascular plants, like liverworts, that didn’t have deep roots and was the first plant plunged to earth.

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Write the bond line formula for the compound (CH3)2CHCH2C(CH3)3.

maks197457 [2]

Formula is (CH3)2CHCH2C(CH3)3 and the name is 2,2,4-trimethylpentane

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3 years ago

[06.04]On a potential energy diagram, the activation energy is greatest under which of the following conditions?

Nata [24]

The first one is the correct answer: <span>The potential energy of the products is greater than that of the reactants and the change in enthalpy is positive.<span> </span></span>

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3 years ago

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What is the concentration, in M, of a KBr solution that contains 0.0688 moles of

ipn [44]

Answer:

2.75M

Explanation:

Concentration(M)= mol/volume

0.0688mol/0.250L

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3 years ago

Give the concentration of solution which contains 2.5g of sugar dissolved in 50g of water.

meriva

Answer: -

The concentration of solution which contains 2.5 g of sugar dissolved in 50 g of water is 5 % (w/w)

Explanation: -

Amount of sugar = 2.5 g

Mass of water = 50 g

Concentration of sugar = $\frac{2.5 g}{50g}$ x 100

= 5%

Thus the concentration of sugar is 5 % (w/w)

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3 years ago

What defines the mass number of an isotope

Lemur [1.5K]

Neutrons + protons = atomic mass number

I hope this helps!

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3 years ago