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ratelena [41]
3 years ago
9

A student increases the temperature of a 200 cm3 balloon from 60⁰C to 180⁰C. What should the new volume of the balloon be? Use t

he formula: V2 = (V1 T2)/T1
Question 3 options:

100 cm3


236 cm3


272 cm3


600 cm3
Chemistry
2 answers:
baherus [9]3 years ago
7 0

Let x represent the new volume:

\frac{200}{60} =\frac{x}{180}

cross multiply:

\frac{36,000}{60x}

then simplify to get 600cm^3

Hope this helps :)

lara [203]3 years ago
5 0
236 cm3 Is the correct answer..
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alekssr [168]

Answer:

2.765amu is the contribution of the X-19 isotope to the weighted average

Explanation:

The average molar mass is defined as the sum of the molar mass of each isotope times its abundance. For the unknown element X that has 2 isotopes the weighted average is defined as:

X = Mass X-19 * Abundance X-19 + MassX-21 * Abundance X-21

The contribution of the X-19 isotope is its mass (19.00 amu) times its abundance (14.55% = 0.1455). That is:

19.00amu * 0.1455 =

2.765amu is the contribution of the X-19 isotope to the weighted average

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3 years ago
3. 78 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the
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Hence, concentration of base is 1.17 M
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The pKa of the α‑carboxyl group of serine is 2.21 , and the pKa of its α‑amino group is 9.15 . Calculate the average net charge
sleet_krkn [62]

Answer:

Net charge in serine at pH equal to 8.30 is "0"

Explanation:

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In chemistry, there is a common note that says, "Like dissolves like".

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Polarity of the substance depends primarily on the type of bond and the difference in electronegativity. 

Water is a polar substance while vegetable oil is not. From the concept presented above, it may be concluded that water will not be able to dissolve the vegetable oil and the assumption is logical. 
3 0
3 years ago
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