How to estimate boiling points?

Answers

Answer 1

Answer: The boiling point is defined as the temperature at which the saturated vapor pressure of a liquid is equal to the surrounding atmospheric pressure.

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What is the oxidation number of sulfur in hydrogen sulfide

Answers

H₂S ( hydrogen sulfide ):

H = + 1

S ( Sulfur ) = - 2

hope this helps!

A sample of nitric acid contains both H3O ions and NO3 ions. This sample has a pHvalue of 1.
What is the color of methyl orange after it is added to this sample?

Answers

The indicator will lead to a solution that has a red color. Methyl orange is an indicator used in titrations because it changes colors at all pH values. When in acidic solution it is red and in basic it is yellow. A pH of 1 is acidic, therefore a red solution.

Which radioisotope emits alpha particles?
(1) Fe-53 (3) Au-198
(2) Sr-90 (4) Pu-239

Answers

Answer : Option 4) Pu-239

Explanation : Plutonium-239 is a radioisotope of the element plutonium which emits alpha particles. The decaying process of Pu-239 emits alpha particles. It is widely used as a nuclear reactor fuel. Pu-239 is also used as a primary fissile isotope for the production of nuclear weapons.

The answer is (4) Pu-239. The decay mode of Pu-239 is α decay which means it will emit alpha particles. The other three have the decay mode of β decay.

Water has one of the highest specific heat capacities.
True
False

Answers

True and it actually has the highest of any liquid

The answer is true. Water does have one the highest specific heat capacities.

What is the volume of 4.5 moles of H2 at STP?

Answers

1.0 mole ---------- 22.4 at STP
4.5 moles --------- ?

4.5 * 22.4 / 1.0

= 100.8 L of H₂

LusterMalleable
Ductile
Conductor
Solid at room temperature

Which element could be described by the list of properties above?

A) magnesium

B) mercury

C) neon

D) phosphorus

Answers

The answer is A) Magnesium.
Hope this helps and let me know if you need more help!

Hey there

The correct answer is (A)

= magnesium

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