3 years ago

Pls help!!! Briefly describe how plasma TVs display colour.

1 answer:

8 0

When the electricity flows into a tube, gas atoms crash inside producing invisible ultraviolet rays. There is a white phosphor coating that turns the invisible rays into visible light. In a plasma tv the cells are like tiny cfls only coated in phonsophers that are rgb

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Which property is common to noble gases?

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The answer is B- Low reactivity.

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3 years ago

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cupoosta [38]

Answer:

my answer is num:3 Hydrogen and oxygen.

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3 years ago

Calculate the percent of lead in Pb (Co3)2

velikii [3]

We will take that molar mass of Pb(CO3)2 represents the total mass of all particles in this compound, ie it has value 100%.

M(Pb(CO3)2) = Ar(Pb) + 2xAr(C) + 6xAr(O) = 207.2 + 2x12 + 6x16= 327.2 g/mol

M(Pb) = 207.2 g/mol

From the date above we can set the following ratio:

M(Pb(CO3)2) : M(Pb) = 100% : x

327.2 : 207.2 = 100 :x

x = 63.33% of Pb there is in <span>Pb(Co3)2</span>

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3 years ago

A sample of an ideal gas at 1.00 atm and a volume of 1.87 L was placed in a weighted balloon and dropped into the ocean. As the

Ludmilka [50]

Answer:

Volume of sample after droping into the ocean=0.0234L

Explanation:

As given in the question that gas is idealso we can use ideal gas equation to solve this;

Assuming that temperature is constant;

Lets $P_1$ and $V_1$ are the initial gas parameter before dropping into the ocean