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kolezko [41]
3 years ago
5

A minerals luster is produced by its ability to transmit light. Opaque minerals always have a metallic luster because they do no

t transmit any light. True False
Chemistry
1 answer:
BaLLatris [955]3 years ago
6 0

Explanation:

The above statement is incorrect. The luster in minerals is not because of the their ability to transmit light but the ability to reflect light from their surface. More, the clean or polished the surface would be more light they would reflect.

Moreover, opaque minerals do not transmit light, they reflect it back into our eyes that is why we can see them. So, this correct.

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A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4
san4es73 [151]

Answer:

83.20 g of Na3PO4

Explanation:

1 mole of Na3PO4 contains 3 moles of Na+.

Mole of Na ion to be prepared = Molarity x volume

                 = 0.700 x 725/1000

                     = 0.5075 mole

If 1 mole of Na3PO4 contains 3 moles of Na ion, then 0.5075 Na ion will be contained in:

           0.5075/3 x 1 = 0.1692 mole of Na3PO4

mole of Na3PO4 = mass/molar mass = 0.1692

Hence, mass of Na3PO4 = 0.1692 x molar mass

                                     = 0.1692 x 163.94

                                        = 83.20 g.

83.20 g of Na3PO4 will be needed.

3 0
4 years ago
Read 2 more answers
I will do ALL of your school work!!
Roman55 [17]

Answer:

What grade are you in. If i am older, I dont think you would be able to help me.

Explanation:

7 0
3 years ago
What does Q=mcdeltaT stand for ?
AVprozaik [17]
Its a formula relating to specific heat capacity

Δθ refers to the change in temperature

Q refers to the energy neededto raise the temperature of an object by the change in temperature

m stands for the mass of tje object

c is the specific heat capacity which is the amount of energy needed to heat up an object per unit mass
4 0
3 years ago
What new information can you add to your definition of physical change ?
Mamont248 [21]
Its reversible, soluble, <span>mass, density, color, boiling point, temperature, and volume. </span>
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3 years ago
5. In this lab, you continued to add Reagent D to each solution until it turned blue. The purpose was to remove the oxygen to me
Basile [38]
A solution is turning blue means, it is turning it's behavior to Basic from Acidic. Reagent D must be a Basic component so it is increasing the pH of the solution. As reaction does not depend on the phase of the component, it could be anything i.e., Solid, Liquid or gas.

Hope this helps!
5 0
4 years ago
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