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tino4ka555 [31]

3 years ago

14

What protects the plant embryo?

1 answer:

Pani-rosa [81]3 years ago

5 0

How do seed plants protect their embryos?
Reptilian embryos are protected from desiccation by a leathery shell. Similarly, sporophytes of both gymnosperms and angiosperms protect embryos within, and they also protect male gametophytes against desiccation using .....

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The isomerization of methylisonitrile to acetonitrile is first order in CH3NC. CH3NC(g) → CH3CN(g) The half life of the reaction

sasho [114]

<u>Answer:</u> The rate constant for the given reaction is $4.33\times 10^{-6}s^{-1}$

<u>Explanation:</u>

For the given chemical equation:

$CH_3NC(g)\rightarrow CH_3CN(g)$

We are given that the above equation is undergoing first order kinetics.

The equation used to calculate rate constant from given half life for first order kinetics:

$t_{1/2}=\frac{0.693}{k}$

The rate constant is independent of the initial concentration for first order kinetics.

We are given:

$t_{1/2}$ = half life of the reaction = $1.60\times 10^5s$

Putting values in above equation, we get:

$k=\frac{0.693}{1.60\times 10^5s}=4.33\times 10^{-6}s^{-1}$

Hence, the rate constant for the given reaction is $4.33\times 10^{-6}s^{-1}$

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3 years ago

33.1 x 105 <br> What is the scientific notation

Sunny_sXe [5.5K]

Answer:

3475.5 or 6591/2

Explanation:

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4 years ago

If an element has two or more atoms with the same number of protons but different number of neutrons it is called what

Oksana_A [137]

It’s called an isotope which is an atom with the same number of protons but a different number of neutrons

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How many different elements have scientists discovered? 12, 112, 118, or more than 500?

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Currently they have discovered 118

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Define empirical formula and molecular formula with example of each

Arlecino [84]

Hi -----):):$/$:); wyd n

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3 years ago