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worty [1.4K]
3 years ago
9

Diffrent Between Gas and Air​

Chemistry
1 answer:
ollegr [7]3 years ago
3 0

Answer:

air is a group of different gases and gas is loose bound atoms of an element

Explanation:

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Describe the three values in a learner-centred curriculum that a teacher can use
ad-work [718]

Answer:

to talk in a way that the class can all understand . help them in thing they are falling . and have a good relashaship.

Explanation:

3 0
3 years ago
A certain substance x decomposes. it is found that 50% of x remains after 100 minutes. how much x remains after 200 minutes if t
fiasKO [112]
The time needed for a substance becomes half of it mass is called half-time, after. In this case, the half time is 100 minutes. Then to know how much substance remain after 200 minutes the equation would be:

Substance remains= 1/2^(time/half-time) x substance initial mass
Substance remains = 1/2^(200 minutes/100minutes) x 1 times= 1/4 times
6 0
4 years ago
In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true for t
RSB [31]
There is no transfer of energy in the reaction.
8 0
3 years ago
Jacob carelessly added only 40.0 mL (instead of the recommended 50.0 mL) of 1.1 M HCl to the 50.0 mL of 1.0 M NaOH. Explain the
Sati [7]

Answer:

Explanation:

mole of NaOH present = molarity x volume

                                     = 1.0 X 0.05 = 0.05 mole

<em>Recommended mole of HCl </em>= 1.1 x 0.05 = 0.055

<em>Mole of HCl carelessly added by Jacob </em>= 1.1 x 0.04 = 0.044

From the equation of reaction:

HCl + NaOH ----> NaCl + H2O

The ratio of mole of HCl to that of NaOH for a complete neutralization reaction is 1:1. However, the recommended mole of HCl (0.055 mole) is more than the mole of NaOH (0.05 mole). <u>Hence, the recommended endpoint of the reaction is supposed to be acidic.</u>

The mole of HCl added by Jacob (0.044) is short of the recommended amount (0.055) and also short of the amount required for a neutral endpoint (0.05). <u>This means that the endpoint will have an excess amount of NaOH and as such, basic instead of the desired acidic endpoint.</u>

8 0
3 years ago
Reactivity and flammability are are examples of properties.​
nika2105 [10]

Answer:

they are eamples of chemical properties

Explanation:

flammibility is the chemical makeup of the element that makes it flamable and reactivitie is the chemical makeup of an element that is able to reacte to another element

3 0
3 years ago
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