CHEMISTRY HIGH SCHOOL

The thermal transfer of energy by electromagnetic waves through the vacuum of space is called what?

Answers

Answer 1
Answer:

Answer: Radiation

Explanation: There are three modes of heat transfer:

1. Conduction: This type of heat transfer happens when there is direct contact between the two object.

2. Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas).

3. Radiation: This type of heat transfer happens when there is direct transfer of energy through space.
Answer 2
Answer: Radiation i think is the correct answer

Related Questions

If the reaction is at dynamic equilibrium at 500 K, which statement applies to the given chemical system?The forward and reverse reactions no longer occur. The rates of the forward and reverse reactions are unequal. The concentrations of the products and reactants do not change. The forward reaction stops at 500 K.
Which substance is a binary acid
You heat a piece of iron from 200 to 400 K What happens to the atom's energy of random motion
What is the difference between an electrons orbital and a planets orbital?
Are all elements abbreviated with one or two letters? If not, name some that aren't.

What term best describes the rate of radioactive decay for a particular radioactive element?A. fast
B. slow
C. variable
D. constant

Answers

Answer:

correct answer is option C (constant)

Explanation:

Radioactive decay of radioactive element occur at known rates, the unit of radioactive decay is called half-life. The amount of time a radioactive element takes for half of the parent atoms to decay is known as half-life of a radioactive element

During Radioactive decay radioactive elements emits a particle. It's impossible to predict exactly when a given atom of a substance will emit a particular particle, but the decay rate of a radioactive element over a long period of time is constant.

By radioactive decay scientist can determine the age of that particular element. If radioactive decay will vary than age cannot be determined from radioactive decay.
The rate of radioactive decay for a particle radioactive element is constant. 

The positively charged particle in an atom's nucleus is called the

Answers

It is called the proton

6) At elevated temperatures, methylisonitrile (CH3NC) isomerizes to acetonitrile (CH3CN):CH3NC (g)  CH3CN (g)At the start of an experiment, there are 0.200 mol of reactant and 0 mol of product in the reaction vessel.After 25 min, 0.108 mol of reactant (CH3NC) remain. There are mol of product (CH3CN) in thereaction vessel.A) 0.200 B) 0.540 C) 0.022 D) 0.092 E) 0.308

Answers

Answer: The moles of product present in the vessel is 0.092 moles

Explanation:

For the given chemical equation:

CH_3CN(g)\rightleftharpoons CH_3CN(g)

We are given:

Initial moles of reactant = 0.200 moles

Unreacted moles of reactant = 0.108 moles

Reacted moles of reactant = 0.200 - 0.108 = 0.092 moles

By Stoichiometry of the reaction:

1 mole of reactant produces 1 mole of product

So, 0.092 moles of reactant will produce = \frac{1}[1}* 0.092=0.092mol of product

Hence, the moles of product present in the vessel is 0.092 moles

Hot water ____.a) has a higher pH value than cold water
b) holds less dissolved oxygen than cold water
c) is beneficial to living organisms in aquatic ecosystems
d) contains more hydrogen than cold water

Answers

B because temperature does not affect the pH or the amount of hydrogen. The ratio of hydrogen to oxygen will always be the same. It's B because gas has more kinetic energy at high temperature and will not dissolve in water well. 

Hot water holds less dissolved oxygen than cold water.

What is the formula of the compound formed between the potassium ion and the sulfide ion?

Answers

Potassium sulphide has the chemical formula  k_(2)S .

What do you mean by Chemical formula ?

A chemical formula is a phrase that lists the constituent parts of a compound together with their relative proportions. No subscript is used if there is just one atom of a certain kind.

Alkali metals in Group 1A produce plus-one ions because they wish to give up their valence electron in their outer shell.

In order to have a complete octet in its outermost shell, sulphur, which is found in the chalcogens, needs to gain two electrons.

Thus, Potassium sulphide has the chemical formula  k_(2)S .

To learn more about Chemical formula, refer to the below link:

brainly.com/question/21272841

# SPJ2
The formula for K+ and S-2 is K2S because you need 2 potassium ions to balance out the sulfide ion

When group 2A element from ion they A. lose two proton
B. gain two proton
C. lose two electron
D. gain two electron

Answers

Well, knowing that group 2A elements are metals, and metals lose electrons to gain a full electron shell, we can eliminate B and D. Knowing that these are 2 electrons, that the group 2A element provides to another atom, to form an ion.

The solution is C. Lose 2 electrons.
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