2 years ago

HELP Which type of circuit would be best to use for lights used for decorations?

Chemistry

1 answer:

xz_007 [3.2K]2 years ago

5 0

Answer:

the 3rd one i took test

Explanation:

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What 2 instruments are commonly used to measure air pressure?

levacccp [35]

I think it is the barometer and aneroid barometer

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3 years ago

Human blood contains a buffer of carbonic acid (H_2 CO_3) and bicarbonate anion (HC〖O_3〗^-) in order to maintain blood pH betwee

kirill115 [55]

Kc = [H3O+][HCO3-] / [H2CO3]

Remember that Kc is products over reactants. Also, you do not include liquid water in a Kc expression, since liquid water has no concentration.

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2 years ago

In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water: CH4 (g) 2O2

Degger [83]

Answer:

The energy released will be -94.56 kJ or -94.6 kJ.

Explanation:

The molar mass of methane is 16g/mol

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$CH_{4}(g) + 2O_{2} (g) --> CO_{2} (g)+ 2H_{2}O(l)$

the enthalpy of reaction is given as ΔH = -890.0 kJ

This means that when one mole of methane undergoes combustion it gives this much of energy.

Now as given that the amount of methane combusted = 1.70g

The energy released will be:

$=\frac{energy released by one moleXgiven mass}{molarmass} =\frac{-890X1.7}{16}= -94.56 kJ$

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2 years ago

Lewis Structure of HOClO

rosijanka [135]

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Then draw valence of each electron and connect them with a line.

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2 years ago

Thallium consists of 29.5%TI-203 and 70.5%TI-205. What is the relative atomic mass of thallium?

ololo11 [35]

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2 years ago

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