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astraxan [27]
3 years ago
11

Is anyone good at 10th grade chemistry ? If so can you help me please

Chemistry
1 answer:
Harrizon [31]3 years ago
5 0

Answer:

221.7 K

Explanation:

As, PV = nRT

Hence,

6.5 (14) = 5(0.0821)T

91 = 0.4105 T

91 ÷ 0.4105 = T

221.7 = T

Hence the required temperature is <u>221.7 K (Ans)</u>

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In the experiment "Beer-Lambert’s Law and Spectrophotometry", you prepared a calibration plot similar to the one pictured below.
dexar [7]

Answer:

0.025M

Explanation:

As you must see in your graph, each concentration of the experiment has an absorbance. Following the Beer-Lambert's law that states "The absorbance of a solution is directely proportional to its concentration".

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<h3>0.025M</h3>
8 0
3 years ago
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Mazyrski [523]

Answer:

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6 0
3 years ago
Which of the following are always larger than the neutral atoms from which they are formed?
Anuta_ua [19.1K]

Answer:

A) Cations

Explanation:

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d) Carbon is an element and it can have a charge anywhere from +4 to -4

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3 0
3 years ago
Calculate the ph of a 0.005 m solution of potassium oxide k2o
Alecsey [184]
First, we have to see how K2O behaves when it is dissolved in water:

K2O + H20 = 2 KOH

According to reaction K2O has base properties, so it forms a hydroxide in water.
For the reaction next relation follows:

c(KOH) : c(K2O) = 1 : 2

So,

c(KOH)= 2 x c(K2O)= 2 x 0.005 = 0.01 M = c(OH⁻)

Now we can calculate pH:

pOH= -log c(OH⁻) = -log 0.01 = 2

pH= 14-2 = 12




3 0
3 years ago
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