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suter [353]
3 years ago
8

How does a changing environment affect plant and animals threat live there

Chemistry
1 answer:
klio [65]3 years ago
4 0

Explanation:

Changing the environment takes away habitats from animals and some nutrients plants need

Hope this helps :>

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How many neutrons are in the nucleus of an atom that has an atomic mass of 36 and an atomic number of 25?
elixir [45]

Answer:

Neutrons = 11

Explanation:

To get the number of neurons an element has you have to subtract the number of protons from the atomic mass of that element.

The number of protons is equal to the atomic number of that element.

Atomic number = Number of Protons

So the number of protons is 25

Neutrons = Atomic mass - Number of Protons

Neutrons = 36 - 25

Neutrons = 11

6 0
3 years ago
Read 2 more answers
How many atoms are there in 5.70 mol of hanfnium?
ANTONII [103]

The correct answer would be 3.49 times 10^ minus 24 molecules

6 0
3 years ago
As Matter Changes States of matter does chemical composition stay the same or not
geniusboy [140]
Whether water is frozen, in a gaseous state, or is a liquid, it is still H2O. So the chemical composition does stay the same.
6 0
3 years ago
Please help!! what is the compound of Sr(NO2)2​
valentinak56 [21]

Answer:

I think this is probably the answer you are looking for.

Explanation:

https://youtu.be/PY431ZC5uDc

4 0
2 years ago
Read 2 more answers
A sample of 10.6 g of KNO3 was dissolved in 251.0 g of water at 25 oC in a calorimeter. The final temperature of the solution wa
finlep [7]

Answer:

36.55kJ/mol

Explanation:

The heat of solution is the change in heat when the KNO3 dissolves in water:

KNO3(aq) → K+(aq) + NO3-(aq)

As the temperature decreases, the reaction is endothermic and the molar heat of solution is positive.

To solve the molar heat we need to find the moles of KNO3 dissolved and the change in heat as follows:

<em>Moles KNO3 -Molar mass: 101.1032g/mol-</em>

10.6g * (1mol/101.1032g) = 0.1048 moles KNO3

<em>Change in heat:</em>

q = m*S*ΔT

<em>Where q is heat in J,</em>

<em>m is the mass of the solution: 10.6g + 251.0g = 261.6g</em>

S is specififc heat of solution: 4.184J/g°C -Assuming is the same than pure water-

And ΔT is change in temperature: 25°C - 21.5°C = 3.5°C

q = 261.6g*4.184J/g°C*3.5°C

q = 3830.87J

<em>Molar heat of solution:</em>

3830.87J/0.1048 moles KNO3 =

36554J/mol =

<h3>36.55kJ/mol</h3>

<em />

6 0
2 years ago
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