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ipn [44]
2 years ago
11

It is found that the new element contains 74 protons and 110 neutrons. What is the atomic number of the element

Chemistry
2 answers:
jarptica [38.1K]2 years ago
6 0

Answer:

74

Explanation:

we know,

atomic number = number of protons

so,

atomic number = 74

OLga [1]2 years ago
3 0

Answer:

Explanation:

74 as the atomic number is determined by the no. of protons in an element

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What volume of 0.08892 M HNO3 is required to react completetly with 0.2352 g of potassium hydrogen phosphate?
galina1969 [7]

Answer:

0.0303 Liters

Explanation:

Given:

Mass of the potassium hydrogen phosphate = 0.2352

Molarity of the HNO₃ Solution = 0.08892 M

Now,

From the reaction it can be observed that 1 mol of potassium hydrogen phosphate reacts with 2 mol of HNO₃

The number of moles of 0.2352 g of potassium hydrogen phosphate

= Mass / Molar mass

also,

Molar mass of potassium hydrogen phosphate

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Number of moles = 0.2352 / 174.15 = 0.00135 moles

thus,

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= 0.0027 mol of HNO₃

Now,

Molarity = Number of Moles / Volume

thus,

for 0.0027 mol of HNO₃, we have

0.08892 = 0.0027 / Volume

or

Volume =  0.0303 Liters

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3 years ago
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Answer:

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