Questions posted in Chemistry

Elements and compounds are substances because we know exactly what is in them. Elements are only one kind of atom and have a symbol. Compounds have a formula telling us exactly how many of what kind of atom make up that compound

Solutions, homogeneous mixtures, not only contain 2 compounds, but we do not know how much of each. We can make salt water with one grain of salt in a cup of water or a drop of water in a cup of salt. Mixtures do not have a formula because they can be any concentration.

Water pressure and gas 

2(H2S) + 3(O2) -> 2(SO2) + 2(H2O)

Answer:  Lipids or amino acids.

Explanation:  Nucleic Acids are the long chain of nucleotides which are in return composed of nucleoside and a phosphate group.

Non example of Nucleic Acid implies those substances which does not qualify themselves as Nucleic Acids. Thus the substances which does not contain nucleotides will be the example of non nucleic acids.

There are many substances which come under the example of non nucleic acids. Two of them are amino acids and lipids.

Lipids are the substances like fats, oil etc which does not dissolve in water but they are soluble in alcohol very easily.

Amino Acids are the substances which contain both a carboxylic group and amine group.

The answer to that would be false

This tell me that 1:24,00 is very hevey 

It lecterns fries that is the answer.

The idea that all matter is made up of tiny, indivisible particles, or atoms, is believed to have originated with the Greek philosopher Leucippus of Miletus and his student Democritus of Abdera in the 5th century B.C. (The word atom comes from the Greek word atomos, which means “indivisible.”)

The more of a substance you have the longer the reaction will take. If you have a big pot of water and a little pot of water. The little pot will heat up quicker then the bigger pot because it does not need to fill a space up. Think of it as diffusion. When you have a 500 and 50 mL beaker, and you add a blue and red dye to them both. It will only take about a minute for the dye to almost completely mix together in the 50 mL. While the 500 mL it will take much longer for dye to mix all together then it did in the 50 mL. When it is a bigger substance it takes longer for a reaction to fully expose the substance to that reaction. If you have food, if you only have one piece of food you only need to put it in for 30 seconds to 1 minute. While if you have multiple pieces of food you will need longer time to be able to heat all of the pieces. If you have a small bowl of soup and you put it in for a minute the middle will be warm. But if you had a bigger bowl and still put it in for only a minute then the middle will be cold because you did not give it enough reaction time to heat the whole substance.

Answer:

There are two energy sublevels s and p.

Explanation:

The principal energy level is a shell in which the electron is located. There are four principal energy level K, L, M, N. These are further divided in energy sublevel s, p, d, f. In first principal energy level (K) there is only one energy sublevel s. In second principal energy level (L) there are two energy sublevel s and p similarly in third (M) and fourth (N) principal energy level there are three (s, p, and d) and four (s, p, d, and f) energy sublevel respectively.

That answer would be luster

The answer would be number 3. it indicated that all atoms contained electrons

3. Atoms change into other atoms in chemical reactions.

The idea that you can transform one element into another was called alchemy, and was proven untrue a long time ago. 

Light and energy is captured by green pigment and chlorophyll molecules.

Pink fluffy unicorns?

Podium HBO outrun tycoon

0.321 is the answer to 321 divided by 1000

hope this helped
dont worry i checked my answer to make sure it was a 100% right

Your answer would be 10 with the remainder of 1

(look at work for the work)

Then water and other substances would be stuck in our body and we would not be able to excrete waste out of our body through the large intestine and small intestine.

Lead is most commonly used for protecting people from radioactive substances

i just took the test and it said that this is the answer

Speed is the distance per unit of time. Velocity is the displacement per unit of time

Answer 1.) Eu3+ ( Europium with charge of + 3 )                                                         Answer 2.) Sn-188 with a -2 charge                                                                               So, we know that 50 protons = the atomic mass= Sn (tin)                                           Now, we have to find the atomic mass/ atomic mass= protons+neutrons/ plugin= 50 protons+ 68 neutrons= 118 amu (atomi mass unit)                                                                                                               Then , we have 48 eletrons ( e-) - ( 50 protons ( positive chage ))=  -2 charge!        Final plugin: Sn-188 with a -2 charge.  

A force applied by the hardwood floor will oppose the motion of the marble, causing the marble to slow to a stop.

This is the correct answer. gravity will cause it to slow down as well as the friction of the floor.

I would maybe say solid at higher temps

Answer: Option (d) is the correct answer.

Explanation:

A force that exists between two or more objects which are not in contact is known as gravitational force. It is a downward force.

For example, falling of an apple on the ground is due to the gravitational force.

Thus, we can conclude that the universal force that exists between any objects with mass is called gravity.

To calculate momentum of an object you would use the following formula:

P = m • v
P = 50 kg • 5 m/s
P = 250 kgm/s.

To solve this kinematics formula use the following equation:

Vf = Vi + at
Vf = 0 + (9.81 m/s^2)(3 seconds)
Vf = 29.43 m/s and or about 29.4 m/s of reported to 3 significant figures.

I believe D because since it is up so high when the lady begins to fall she will have a greater force bringing her back to her original starting point

Wouldn't the side of the Earth that is opposite to the moon be experiencing day time? I'm not sure what you're asking. It would be exposed to the Sun.