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Gre4nikov [31]
3 years ago
8

Calculate in gramm the mass of 0.1 mole of hydrochloric acid(h=1 ,cl=35.5)​

Chemistry
1 answer:
babunello [35]3 years ago
6 0

Answer:

mass of HCl = 3.65 g

Explanation:

Data Given:

Moles of hydrochloric acid HCl = 0.1 mole

Mass in grams of hydrochloric acid HCl = ?

Solution:

Mole Formula

                  no. of moles = Mass in grams / molar mass

To find Mass in grams rearrange the above Formula

                Mass in grams = no. of moles x molar mass . . . . . . . (1)

Molar mass of HCl = 1 + 35.5 = 36.5 g/mol

Put values in equation 1

              Mass in grams = 0.1 mole x 36.5 g/mol

              Mass in grams = 3.65 g

mass of HCl = 3.65 g

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What is the percent composition by mass of oxygen in Ca(NO3)2 (gram-formula= 164 g/mol)?
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To find this, we will use this formula:

Molar mass of element
------------------------------------ x 100
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So, first lets calculate the mass of the compound as a whole. We use the atomic masses on the periodic table to determine this.

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N2 (there is two nitrogens): 28.014 g/mol
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When we add all of those numbers up together, we get 164.086. That is the molar mass for the whole compound. However, we are trying to figure out what percent of the compound oxygen makes up. From the molar mass, we know that 95.994 of the 164.086 is oxygen. Lets plug those numbers into our equation!

95.994
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When we divide those two numbers, we get .585. When we multiply that by 100, we get 58.5.

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5 0
3 years ago
Consider the following reaction.
Ivan

Answer:

162 g Fe₂O₃

Explanation:

To find the mass of Fe₂O₃, you need to (1) convert grams C to moles C (via molar mass from periodic table), then (2) convert moles C to moles Fe₂O₃ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Fe₂O₃ to grams (via molar mass). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the given value.

Molar Mass (C): 12.011 g/mol

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Molar Mass (Fe₂O₃): 159.684 g/mol

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--------------  x  ----------------  x  -------------------------  x  -----------------  = 162 g Fe₂O₃
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1 year ago
A neutral atom has the following electron configuration: What is the chemical symbol for the atom? How many electrons does the a
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2 years ago
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Answer:the pH is 12

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Then:

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