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4 years ago

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