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Alexandra [31]
3 years ago
12

Atom A and Atom B have the same number of protons and neutrons, but they do not have the same nun ber of

Chemistry
1 answer:
Bogdan [553]3 years ago
6 0

Answer:

The atoms have the same chemical symbol.

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A 1.5 M solution of NaOH was made in a laboratory. If the solution made had a volume of 4.5 L, how many grams of NaOH were added
Crank

Answer:

270g

Explanation:

Given parameters:

Concentration of NaOH  = 1.5M

Volume  = 4.5L

Unknown

Mass of NaOH added  = ?

Solution:

To solve the problem, we need to find the number of moles of the NaOH first;

 Number of moles  = concentration x volume

 Number of moles  = 1.5 x 4.5  = 6.75mol  

Now;

  Mass  = Number of moles x molar mass

 Molar mass of NaOH  = 23 + 16 + 1  = 40g/mol

  Mass  = 6.75 x 40  = 270g

6 0
2 years ago
What are the three types of nuclear radiation?
VikaD [51]
I believe the first one is correct.
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3 years ago
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Calculate the number of atoms in 1g of calciumj​
irga5000 [103]

Answer:

It's about mass of 40.1⋅g

Explanation:

I hope this helps you out. Have a nice day!

3 0
2 years ago
A 100g piece of iron at 150oC is emersed in 268.5 g of water at 20oC. the temperature of both iron and water became 25oC. If the
borishaifa [10]

Answer:

cW = 4.2J/g.k

Explanation:

Heat gained = Heat lost

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mi= 100g

ci = 0.449

∆€i= 150-25 = 125

...

mw= 268.5g

cw = ?

∆€w=25-20 = 5

...

100×0.449×125= 268.5×cw×5

5612.5= 1342.5cw

cw = 5612.5/1342.5

cw= 4.18 ~ 4.2J/g.K

4 0
2 years ago
Which of the following could have caused curve B to be different from curve A?
Mamont248 [21]

A. More reactants could have been added to reaction B










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3 years ago
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