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notka56 [123]
3 years ago
5

PLEASE PLEASE HELP THIS IS SCIENCE !! ILL MARK U BRAINLIEST IF UR CORRECT

Chemistry
2 answers:
likoan [24]3 years ago
8 0

Answer:

Explanation:

question 14 is a

question 15 is c

questoin 13 is d

anyanavicka [17]3 years ago
3 0

Answer:

Q 14 Deceleration

Explanation:

You are slowing down

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An object submerged into 50 cm^3 of water raises the water level to 65 cm^3. The mass of the object is 30 g. What is its density
Anna007 [38]

Answer:

Convert the volume to m³.

Explanation:

8 0
3 years ago
Right ground state electron configuration for these ions which play important roles and biochemical process in our bodies. (use
lesya692 [45]
I think the answer is d.
3 0
3 years ago
If CO2 is not removed by boiling the solution after the addition of HCl, how will this affect the amount of NaOH required to rea
zimovet [89]

Answer:

See explanation

Explanation:

CO2 reacts with water to form carbonic acid as follows;

CO2(g) + H2O(l) ---------> H2CO3(aq)

This makes the solution more acidic hence it will require more NaOH to reach end point due to the increase in acidity.

Hence, if CO2 is not removed by boiling the solution, a greater amount of NaOH is required to reach end point.

6 0
3 years ago
Calculate the standard enthalpy of the reaction, ΔH∘rxn, for the thermite reaction: 2Al(s)+Fe2O3(s)→2Fe(s)+Al2O3(s) Elements in
alina1380 [7]

Answer:

The answer to your question is:  ΔH = -849.5 KJ/mol

Explanation:

Data

ΔH = ?

H Fe2O3 = -825.5 KJ/mol

H Al2O3 = -1675 KJ/mol

H Al = 0 KJ/mol

H Fe = 0 KJ/ mol

Reaction

                      2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s)

ΔH = H products - H reactants

ΔH = H Al2O3 - H Fe2O3

ΔH = -1675 - (- 825.5)

ΔH = -1675 + 825.5

ΔH = -849.5 KJ/mol

3 0
3 years ago
Read 2 more answers
What is the wavelength of a 4.3 x 1015 /s wave?
bagirrra123 [75]
I attached the working and the answer to the question below.

<span>Note that in the formula,  C = speed of light, ν = frequency, λ= wavelength
</span><span>
The wavelength of a 4.3 x 10</span>¹⁵<span>  /s wave is 6.98 </span>× 10⁻⁶.


7 0
3 years ago
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