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Alika [10]
4 years ago
7

What is demand?

Chemistry
1 answer:
natali 33 [55]4 years ago
7 0
I would say B.the desire to own something and the ability to pay for it 
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Look at the picture below. Name the isotope
andrew11 [14]
It is potassium 39 definately
6 0
3 years ago
Balance these chemical equations mg(s)_ + _N2(g) = _mg3N2
Salsk061 [2.6K]

Answer:

3 Mg(s) + N_2(g) = Mg_3N_2(s)

Explanation:

The valance of magnesium atom is  +2

While the valence of nitrogen atom is - 3

Let us first write the first  half-reactions

Mg ---> Mg^{2+} + 2e^{-}

The second half reaction is

2N + 6e^-  -----> N_2

Adding the above two reactions and writing the final reaction, we get -

Mg + N2 = Mg_3N_2

The balance equation is

3 Mg(s) + N_2(g) = Mg_3N_2(s)

6 0
4 years ago
An aqueous solution is prepared by dissolving 15.6 g of Cu(NO3)2 ⋅ 6 H2O in water and diluting to 345 mL of solution. What is th
Vladimir [108]

<u>Answer:</u> The molarity of NO_3^- ions in the solution is 0.306 M

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

We are given:

Mass of solute (Cu(NO_3)_2.6H_2O) = 15.6 g

Molar mass of (Cu(NO_3)_2.6H_2O) = 295.6 g/mol

Volume of solution = 345 mL

Putting values in above equation, we get:

\text{Molarity of }Cu(NO_3)_2.6H_2O=\frac{15.6g\times 1000}{295.6g/mol\times 345mL}\\\\\text{Molarity of }Cu(NO_3)_.6H_2O=0.153M

As, 1 mole of (Cu(NO_3)_2.6H_2O) produces 1 mole of copper (II) ions and 2 moles of nitrate ions.

So, molarity of NO_3^- ions = (2 × 0.153) = 0.306 M

Hence, the molarity of NO_3^- ions in the solution is 0.306 M

3 0
3 years ago
What does 3 indicate in 1s22s22p63s1
Hunter-Best [27]
3s it is what it says sorry if this is wrong but I just did a qu like this and that's what it was
4 0
4 years ago
What is the special process called where carbon dioxide and water in the presence of sunlight is turned in carbohydrates
Genrish500 [490]
Photosynthesis: The process of making something ( carbohydrates ) with light
CO+H2O &Sunlight=O2+C6H6O12
5 0
4 years ago
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