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3 years ago

What is an example of internal stimulus to which plants can respond?

Chemistry

1 answer:

fgiga [73]3 years ago

7 0

Some examples are Hunger thirst pain

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How many moles are there in a 122 gram sample of nickel (Ni)?

Tpy6a [65]

The molecular weight of nickel is 58.69 g/mol. thus in a 122 gram sample of nickel there are 122/58.69=2.08 moles of nickel.

5 0

3 years ago

Calculate the enthalpy change for the thermite reaction: 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s), ΔH∘rxn=−850 kJ when 12.0 mol of Al und

djverab [1.8K]

<u>Answer:</u> The enthalpy of the reaction for given amount of aluminium will be $-51.0\times 10^2kJ$

<u>Explanation:</u>

We are given:

Moles of aluminium = 12 moles

For the given chemical reaction:

$2Al(s)+Fe_2O_3(s)\rightarrow 2Fe(s)+Al_2O_3(s);\Delta H^o_{rxn}=-850kJ$

By Stoichiometry of the reaction:

If 2 moles of aluminium produces -850 kJ of energy.

Then, 12 moles of aluminium will produce = $\frac{-850kJ}{2mol}\times 12mol=-5100kJ$ of energy.

Converting this into three significant figures, we get:

$\Rightarrow -5100kJ=-51.0\times 10^{2}kJ$

Thus, the enthalpy of the reaction for given amount of aluminium will be $-51.0\times 10^2kJ$

4 0

3 years ago

When atoms react they form a chemical bond which is defined as

kramer

When atoms react they form a chemical bond which is defined as the force of attraction that holds atoms together. It can be covalent bonding, ionic bonding or metallic type of bonding. These bonds are what atoms in a compound hold together.

8 0

4 years ago

is carried out adiabatically in a constant-volume batch reactor. The rate law is Plot and analyze the conversion, temperature, a

Sphinxa [80]

Answer:

See explaination

Explanation:

The mole balance for a constant-volume batch reactor is given such as, For a first-order isothermal reaction, the time to reach a given conversion is the same for constant-pressure and constant-volume reactors. Also, the time is the same for a reaction of any order if there is no change in the number of moles.

Please kindly check attachment for the step by step solution of the given problem.

5 0

3 years ago

Assume that your electrical power company gets its energy from a hydroelectric dam. Outline all of the energy changes that occur

hodyreva [135]

Assume that your electrical power company gets its energy from a hydroelectric dam. Outline all of the energy changes that occurred from the falling water that turned the generators at the dam to the hot air that was produced from your hair dryer this morning.

3 0

3 years ago

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