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3 years ago

What element has beryl emeralds and aquamarine?

Chemistry

1 answer:

olasank [31]3 years ago

7 0

Answer:

Pure Beryl is colorless.

Explanation:

The wide range of impurities cause the diverse amount of colors and many varieties. The green color in emerald is usually caused by traces of the element chromium, and the blue color of aquamarine usually by iron.

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How many moles of na+ are present in 343 ml of a 1.27 m solution of na2so4?

cricket20 [7]

Sodium sulfate, Na₂SO₄, is a strong electrolyte. It means that it dissociates into 2 Na⁺ ions and 1 SO₄⁻ ion when dissolved in water. So, for every 1 mole of Na₂SO₄, there is an equivalent amount of 2 mol Na⁺ ions. The solution is as follows:

Moles of Na⁺ = (1.27 mol Na₂SO₄/L)*(1 L/1000 mL)*(343 mL)*(2 mol Na⁺/1 mol Na₂SO₄)
<em>Moles of Na⁺ = 0.87 mol</em>

4 0

4 years ago

If you had excess chlorine, how many moles of of aluminum chloride could be produced from 10.0 gg of aluminum? Express your answ

gayaneshka [121]

Answer:

The answer is 0.370moles (3 s.f)

Explanation:

Step 1: write the balanced equation for the reaction

Equation for the reaction:

2Al(s) + 6HCl(g) ---------> 2AlCl3(g) + 3H2(g)

Step 2: Equate the mole of the needed substances

So therefore,

2moles of aluminum will produce 2 moles of aluminum chloride

Note that:

Relative atomic mass of Al = 27 g/mole

And, 27g of Al = 1 mole of Al.

Step 3: Solve for the required number of mole.

2moles of Al = 2moles of AlCl3

Same as

1 mole of Al = 1 mole of AlCl3

27g of Al = 1 mole of AlCl3

10g of Al = (1/27 * 10g) of AlCl3

10g of Al = 0.370moles of AlCl3

Thanks

4 0

3 years ago

What are essential elements in plants?

madam [21]

Answer:

Chlorophyll is one. I can't quite remember other

5 0

3 years ago

How to add magnisume and chloride togather

marusya05 [52]

Magnesium plus chlorine equals to magnesium chloride

6 0

3 years ago

Read 2 more answers

What is the frequency of 3.98 x 10^-77

LekaFEV [45]

Answer:

What is the frequency of a 6.9 x 10-13 m wave? 3.00 x 108 = 6.9x10-13 mly). GAMMA. V = 4.35 x 10 20 5-11. 3. What is the wavelength of a 2.99 Hz wave?

Missing: 3.98 ‎77

Explanation:

5 0

3 years ago