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AysviL [449]
4 years ago
8

7) Aluminum forms an ion with a charge of ? A) 2+ B) 1- C) 3+ D) 2- E) 0

Chemistry
1 answer:
Allisa [31]4 years ago
3 0

Answer:

C. 3+ ((I have to have an answer of 20 characters just ignore this))

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In a DNA sample, 15% of the bases are thymine (T). What percentage of the bases in this sample are cytosine (C)?
allochka39001 [22]

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C) 35%

Explanation:

Thymine pairs with adenine. If thymine is 15% then so would adenine be 15%. That leaves the reaminder to be 70%. Cytosine pairs with guanine, thereby, they would each be 35%.

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3 years ago
Is the sun 240,000 miles from earth?
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92.96 million mi away
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A student drank a bottle of water during a car ride up a mountain. At the top of the mountain, the student capped the plastic bo
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It might cave in on itself or collapse because of the change in pressure.

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4 years ago
A star is observed from two positions of Earth in its orbit, in summer and winter. Which of these is the best method to calculat
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6 0
3 years ago
Determine the approximate amount of potassium hydrogen phthalate, KHP, that you will need to neutralize 6.00 ml of 0.100 M NaOH.
Sveta_85 [38]

Answer:

potassium hydrogen phthalate KHP MOLAR MASS = 204.233 glmol

to get 1000 ml

Molar concentration = Mass concentration/Molar Mass

mass concentration = molar concentration x molar mass

mass concentration=0.1 M,

molar mass= 204.233 g/mol

so to get 1L

mass conc = 204.233 x 0.1

= 20.4233g  for 1L or 1000 ml

to get 6.00 ml

if 20.4233g is for 1000ml

then to 6.00 ml

= 20.4233 x 6 / 1000

= 0.123g for 6.00 ml

according to the equation below

NaOH(aq) + KHC8H4O4(aq) --> KNaC8H4O4(aq) + H2O(l)

number of moles of NaOH is equal to that of KHP

so the same amount will be needed too, which is

= 0.123g

6 0
3 years ago
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