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Ymorist [56]
2 years ago
5

Balance the equation ____Mg+_____HNO3=____Mg(NO3)2+H2

Chemistry
1 answer:
Arturiano [62]2 years ago
7 0

Explanation:

2Mg⁺ 2HNO₃ = Mg(NO₃)₂ + H₂

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The main types of chemical bonds are ________ and _______ bonds
Musya8 [376]

Answer:

covalent and ionic

Explanation:

covalent is nonmetal+nonmetal

ionic is metal+nonmetal

5 0
3 years ago
Which of the following is the correct sequence for the discovery of subatomic particles? a Electrons> Protons > Neutrons b
laila [671]

Answer:

C

Explanation;

Maybe is C

4 0
3 years ago
Read 2 more answers
What is the molarity of a solution containing 8.9 g of NaOH in 550. mL of NaOH solution?
bulgar [2K]

Answer:

0.4 M

Explanation:

Molarity is defined as moles of solute, which in your case is sodium hydroxide,  

NaOH

, divided by liters of solution.

molarity

=

moles of solute

liters of solution

Notice that the problem provides you with the volume of the solution, but that the volume is expressed in milliliters,  

mL

.

Moreover, you don't have the number of moles of sodium hydroxide, you just have the mass in grams. So, your strategy here will be to

determine how many moles of sodium hydroxide you have in that many grams

convert the volume of the solution from milliliters to liters

So, to get the number of moles of solute, use sodium hydroxide's molar mass, which tells you what the mass of one mole of sodium hydroxide is.

7

g

⋅

1 mole NaOH

40.0

g

=

0.175 moles NaOH

The volume of the solution in liters will be

500

mL

⋅

1 L

1000

mL

=

0.5 L

Therefore, the molarity of the solution will be

c

=

n

V

c

=

0.175 moles

0.5 L

=

0.35 M

Rounded to one sig fig, the answer will be

c

=

0.4 M

Explanation:

6 0
2 years ago
What is a substance?
shusha [124]

I think the answer is C. An element or compound that cannot be physically separated. Sorry if im wrong.

7 0
3 years ago
How many hydrogen atoms are found in the<br> hydrate (NH4)3PO4.5H2O?
igomit [66]

Answer:

22

Explanation:

3x4+  5x2

3 0
2 years ago
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