What does "like dissolves like" mean
Explain why metric prefixes are used ,what is the common denominator between them??
Which Group 15 element exists as diatomic molecules at STP? (1) phosphorus (3) bismuth
(2) nitrogen (4) arsenic
Answer: The correct option is 2.
Explanation: Group 15 elements are Nitrogen, phosphorous, Arsenic, Antimony, Bismuth.
To know whether an element exits as a diatomic molecule or not, we look at the atomicity of an element.
Atomicity is the number of atoms of an element combining to form a molecule.
Atomicity of Nitrogen = 2
Atomicity of Phosphorous = 4
Atomicity of Bismuth = 1
Atomicity of Arsenic = 1
The element having atomicity 2 will exist as a diatomic molecule.
Hence, Nitrogen is a diatomic molecule
A nitrogen-containing compound shows no absorption band at ∼3400cm−1 and no absorption bands between ∼1700cm−1 and ∼1600cm−1. what class of compound is it
In the mineral beryl what is the ratio of beryllium to aluminum to silicate.? 1. 1:1:1 2. 1:2:3 3. 1:36 4. 1:2:6
correct answer is 1:2:6
If you have a density of 3g/meander a mass of 15g what is the volume?
Please help quick!!! 30 points :D 1.)Energy that comes from the internal motion of atoms and molecules is called
2.)In any energy conversion, some of the energy is lost to the environment as
3.)Based on the principles of convection, conduction and thermal radiation, which scenario(s) below is/are most similar to heating a tin can of water using a Bunsen?
The sun warming up the roof on a house.
Cold water sinking in a pot of water being warmed up on the stove
Warm air rising in a room where the air is moving
Feeling a metal wire get warmer as you roast a marshmallow over a fire.
2 and 3 only.
All of these choices.
2, 3, and 4 only.
Energy that comes from the internal motion of atoms and molecules is called chemical energyExplanation:
When atoms inside an object vibrate or they move then give up their energy. This energy is given as the chemical energy. Chemical energy is energy stored in the bonds of atoms and molecules. When these atoms or molecules move they are said to be ions as well and when their bonds break they are dissociated in their respective ions.
In any energy conversion, some of the energy is lost to the environment as thermal energyExplanation:
Thermal energy is the energy produced from heat. For example the burning of fossil fuels in the environment produces heat ot thermal energy as well. Similarly the burning of gasoline inside automobiles engines also produce heat energy. So we can say that In any energy conversion, some of the energy is lost to the environment as heat or thermal energy.Answer 3:
The correct options are
The scenario given above is the phenomenon of convection which is defined as the process in which heat i transferred from one object to another object by direct contact of those two objects. So if we see the question we are given with convection process hence a metal wire get warmer as we roast a marshmallow over a fire. Or cold water sinking in a pot of water being warmed up on the stove.
2) Potential Energy
3) 2 and 3 only
what is a mole and why does a mole of magnesium and a mole of carbon weigh different they have the same number of atoms?
What is the concentration of sodium phosphate contains 0.60 M Na+? I'm not sure what to do and how to figure how to do this question.