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charle [14.2K]
4 years ago
12

PLEASE ANSWER

Chemistry
2 answers:
zhuklara [117]4 years ago
6 0
D) light is reflecting in the direction indicated by T.
rewona [7]4 years ago
5 0

Answer: D) light is reflecting in the direction indicated by T.

Explanation:

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4 years ago
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Which statements best describe conduction? Check all that apply.
Gennadij [26K]

The statements that best describe conduction are

-Conduction can occur within a substance or between two substances.

-Fast-moving molecules collide with slow-moving molecules.

-Thermal energy is transferred from a warmer substance to a cooler substance.

Explanation :

-Conduction can occur within a substance or between two substances.

Conduction can occur within a substance, but the heat will transfer by conduction only when those parts of the substance are at different temperatures.

For example, when we hold a metal rod over a flame, the end which is in direct contact with the flame becomes hot first. As we continue to heat, the other end of the rod also becomes hot because heat gets transferred through the rod by conduction.

Similarly heat can also be transferred between 2 substances which are in direct contact with each other.

In the above example, when a person is holding the other end of the rod, their hand might burn. In this case heat is transferred between 2 objects ( rod & hand) which are in direct contact by conduction.

-Fast-moving molecules collide with slow-moving molecules.

When an object heated, the molecules gain thermal energy and start vibrating. These vibrating molecules transfer their kinetic energy to neighboring molecules which are at lower temperature and hence are slow moving. This transfer occurs till both of them attain the same temperature.

-Thermal energy is transferred from a warmer substance to a cooler substance.

Thermal energy is always transferred from a warmer substance to a cooler substance. In conduction mode, heat is transferred by transfer of kinetic energy from fast moving molecules to slow moving molecules.

4 0
4 years ago
Read 2 more answers
What is the rate of a reaction if the values are
3241004551 [841]

Answer:

Explanation:

Hi there,

To get started, let's first observe our rate law:

R=k[A]^2[B]^2     we typically use square brackets [x] for chemistry kinetics, because they specifically tell us we are dealing with <em>concentrations</em>.

This rate law is in fourth-order, because the concentrations powers add up to 4. We are not told the unit of time for this prompt (unless you know it), so I just assumed the time unit to be "time."

To calculate the reaction rate, we simply plug in the concentration of A and B into the rate law. k is the <em>rate constant</em> and stays the same for an individual reaction.

R=(0.1 \ M^{-3}*time^{-1})[1 \ M]^2[2 \ M]^2=0.4 \ M/time

Thus, the rate of reaction with those concentrations is 0.4 M/time.

Notice, the rate constant does in fact have units of it own. The unit for k can be calculated by knowing that:

  1. Rate (R) must end up with units of concentration (M) per time.
  2. The concentrations raised to a power can be used to help solve for the units of k.

If you liked this solution, leave it as Brainliest Answer and give a Rating!

5 0
3 years ago
PLEASE HELP ME !!! :(
Akimi4 [234]

Answer:

You need two potassium atom to form an ionic bond with one sulfur atom. Pottassium ions are formed by donating losing their electrons in the outermost shell, thr lost electrons are gained by sulphur atom to form 2K+ and S2-, respectively. The attraction between the positive ions and negative ions gives rise to the ionic bond and the molecular formula is K2S

Explanation:

4 0
2 years ago
Which of the following is not a type of radiation? A. trans-radiation B. inhaled radiation C. terrestrial radiation D. cosmogeni
Sindrei [870]
I would say the answer is A.
5 0
4 years ago
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