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3 years ago

How many protons do calcium have

Chemistry

2 answers:

elixir [45]3 years ago

7 0

A calcium atom has 20 protons

Vsevolod [243]3 years ago

6 0

A calcium atom has 20 protons!

There you go! I really hope this helped, if there’s anything just let me know! ☻

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A student used 1.168g of an unknown weak acid and titrated it against 28.75 mL of 0.105M NaOH to reach the equivalence point. Wh

Vaselesa [24]

Answer:

The molar mass of the unknown acid is 386.8 g/mol

Explanation:

Step 1: Data given

Mass of the weak acid = 1.168 grams

volume of NaOH = 28.75 mL = 0.02875 L

Molarity of NaOH = 0.105 M

Since we only know 1 equivalence point, we suppose the acid is monoprotic

Step 2: Calculate moles NaOH

Moles NaOH = molarity NaOH * volume NaOH

Moles NaOH = 0.105 M * 0.02875 L

Moles NaOH = 0.00302 moles

We need 0.00302 moles of weak acid to neutralize the NaOH

Step 3: Calculate molar mass of weak acid

Molar mass = mass / moles

Molar mass = 1.168 grams / 0.00302 moles

Molar mass = 386.8 g/mol

The molar mass of the unknown acid is 386.8 g/mol

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How many electrons do carbon and oxygen share?<br> I-0-I<br> :0:<br> Intro<br> Done

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If the reactants contain one chlorine molecule, do you know how many chlorine atoms will be in the product? Include conversion o

max2010maxim [7]

Answer:

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The reactants contain one chlorine molecule( $Cl_{2}$ ) which has two chlorine atoms.

Then, according to law of conservation of matter, the product must contain two chlorine atoms.

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