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Brums [2.3K]
3 years ago
9

What volume of a 2.5M NaOH solution is required to prepare 2.0 liter of a 0.75M NaOHv

Chemistry
1 answer:
Zepler [3.9K]3 years ago
4 0
You need 0.60 liters.
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Which is the atomic number of an atom that forms an ion with 18 electrons and a charge of 2+?
Anettt [7]

Answer:

Calcium

Explanation:

It has 20 electrons to start, loses two to become Ca 2+, and is left with 18 electrons

5 0
2 years ago
What volume measured in stp will 3.75 grams of helium gas occupy?
Andre45 [30]
Molar mass  helium gas :

He = 4.0 g/mol

number of moles:  3.75 / 4.0 => 0.9375 moles

1 mole ------ 22.4 ( at STP)
0.9375 ------ ?

volume = 0.9375 x 22.4 / 1

Volume = 21 / 1

Volume = 21 L

hope this helps!

6 0
3 years ago
How many bonds does CIO3- have, the chlorate ion have?
chubhunter [2.5K]
2 ions in that solution.
7 0
3 years ago
To whoever helps me thank you so much have a wonderful day!
Schach [20]

Answer:

N and P

Explanation:

Anion:

When an atom gain the electrons anion is formed. The negative sign shows that atom gain electron because number of electron are greater than protons or we can say that negative charge becomes greater than positive charge.

Cation:

When atom lose electron cation is formed. The atom thus have positive charge because number of positive charge i.e protons are increased are greater than negative charge or electron.

In given problem N and phosphorus both can gain three electrons which means negative charge becomes greater that's why the extra electron gained by atoms are written as -3 and both form anion with charge -3.

while Al form cation with charge +3 Mg form cation with charge +2 and iodine and bromine both form anion with charge of -1.

8 0
2 years ago
A compound contains 72% magnesium and 28% nitrogen. What is its empirical formula?
SashulF [63]

So the empirical formula is Mg3N2

7 0
3 years ago
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