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3 years ago

173Lu has how many protons and neutrons

Chemistry

1 answer:

zheka24 [161]3 years ago

3 0

Answer:

71 protons

102 neutrons

Explanation:

Step 1: Find atomic number of Lu

Lu - Element number 71

So we know that Lu has 71 protons.

Step 2: Identify Lu - 173

173 is the atomic mass number, meaning the combined number of protons AND neutrons.

173 - 71 = 102 neutrons

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How many major Foods or food groups accounts for 90% of food allergens?

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Answer:

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3 years ago

PLS ANSWER FAST AHAH<br><br> distilled water is a pure substance <br> true or false ?

mr Goodwill [35]

Answer:

True

Explanation:

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3 years ago

All electromagnetic waves travel at the same speed in a vacuum, usually referred to as the speed of light. This speed is approxi

natali 33 [55]

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3 years ago

In a titration, 4.7 g of an acid (HX) requires 32.6 mL of 0.54 M NaOH(aq) for complete reaction. What is the molar mass of the a

katrin2010 [14]

Answer : The molar mass of an acid is 266.985 g/mole

Explanation : Given,

Mass of an acid (HX) = 4.7 g

Volume of NaOH = 32.6 ml = 0.0326 L

Molarity of NaOH = 0.54 M = 0.54 mole/L

First we have to calculate the moles of NaOH.

$\text{Moles of }NaOH=\text{Molarity of }NaOH\times \text{Volume of solution}=0.54mole/L\times 0.0326L=0.017604mole$

Now we have to calculate the moles of an acid.

In the titration, the moles of an acid will be equal to the moles of NaOH.

Moles of an acid = Moles of NaOH = 0.017604 mole

Now we have to calculate the molar mass of and acid.

$\text{Moles of an acid}=\frac{\text{Mass of an acid}}{\text{Molar mass of an acid}}$

Now put all the given values in this formula, we get:

$0.017604mole=\frac{4.7g}{\text{Molar mass of an acid}}$

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3 years ago

The colour change of methyl orange with neutral substance

Arisa [49]

Answer:

Pink

Explanation:

Because at first its orange then neutral its pink

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4 years ago