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Digiron [165]
3 years ago
14

(I NEED THIS ANSWERED QUICKLY! I'M TAKING A QUIZ!)

Chemistry
2 answers:
defon3 years ago
8 0
Answer is D. Beaker can ONLY provide approximate volume of a liquid.
Answer B is incorrect. Graduated cylinder provides an accurate volume of a liquid, not a beaker.
Citrus2011 [14]3 years ago
3 0

Answer:

B

Explanation:

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Initial Concentration mol/L[A] Initial Concentration mol/L[B] Initial Rate mol/Ls 0.20 0.10 20 0.20 0.20 40 0.40 0.20 160 Given
zimovet [89]
The generalized rate expression may be written as:
r = k[A]ᵃ[B]ᵇ

We may determine the order with respect to B by observing the change in rate when the concentration of B is changed. This can be done by comparing the first two runs of the experiment, where the concentration of A is constant but the concentration of B is doubled. Upon doubling the concentration of B, we see that the rate also doubles. Therefore, the order with respect to concentration of B is 1.
The same can be done to determine the concentration with respect to A. The rate increases 4 times between the second and third trial in which the concentration of B is constant, but that of A is doubled. We find that the order with respect to is 2. The rate expression is:

r = k[A]²[B]
4 0
3 years ago
Read 2 more answers
7. Lli(s) + N₂(g) → 2 Liz Ncs)
timurjin [86]

The number of mole of lithium, Li needed for the reaction is 3.2 moles (Option D)

<h3>Balanced equation </h3>

4Li + N₂(g) → 2Li₂N

From the balanced equation above,

2 moles of Li₂N were obtained from 4 moles of Li

<h3>How to determine the mole of lithium needed </h3>

From the balanced equation above,

2 moles of Li₂N were obtained from 4 moles of Li

Therefore,

1.6 moles of Li₂N will be obtained from = (1.6 × 4) / 2 = 3.2 moles of Li

Thus, 3.2 moles of Li are needed for the reaction

Learn more about stoichiometry:

brainly.com/question/14735801

8 0
3 years ago
How many moles in 16.012 g
olga_2 [115]
If you want you can repost this question with a picture but I need to see it in order to help you , or you can read the picture I added for you

5 0
3 years ago
A certain shade of blue has a frequency of 7.18 × 1014 Hz. What is the energy of exactly one photon of this light?
timurjin [86]
E=hv h = 6.626 × 10^-34 joule·s v=frequency i got 4.7636x10^-30 J
3 0
3 years ago
Can u pls help me with this question ​
ziro4ka [17]
I think it is A as solid atoms are close and gases are far away
8 0
3 years ago
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