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salantis [7]
3 years ago
9

Can someone please help me with all of these questions or at least some of them? Thanks!!

Chemistry
1 answer:
Leona [35]3 years ago
4 0
15. elements in the same row/number have similar properties
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We can prove a theory to be correct by performing the right experiment. False or true
eimsori [14]

Answer:

true

Explanation:

because if you find the right answer that proves the theory to be correct.  

4 0
3 years ago
What are deltaTb and deltaTf for an aqueous solution that is 1.5g nacl in 0.250kg h2o? Given Kb=0.51 C/m and kr=1.86 C/m
bulgar [2K]

Answer:

T_f for given question is 2.79 and T_b is 0.52

\Delta T_b = I \times K_b \times m {i- vant hoff’s constant ; Kb- constant ; m molarity }

M = no. of moles of the solute present in one kg of solution

Let the weight of amount of solute be “w” and its molecular mass be “M”

Let the mass of the solvent in the given question be “x”

\Delta T_b = I \times K_b \times (w/M)/ x

\Delta T_b = I \times K_b \times w/Mx

\Delta T_b = 1 \times 0.51 \times1.5/(0.250 \times 58.44) = 0.052

\Delta T_f = M \times K_f = 1.86 \times 1.5 = 2.79

4 0
3 years ago
The specific heat of wood is 2.03 J/g.°C. How much
Brilliant_brown [7]

Answer:

11419 J/g/ 11.419 KJ/g

Explanation:

H=MCQ

H=225×2.03×(-15-10)

H=225×2.03(25) Note; negative sign is of no use

H=11419J/g

3 0
3 years ago
How does increasing the temperature affect collisions?
ddd [48]
Combustion Have a great day!
8 0
3 years ago
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All of these could be considered disadvantages of nuclear power plants except
ki77a [65]

Answer:

B

Explanation:

Mark as brainliest ;)

8 0
3 years ago
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