Questions posted in Chemistry

Answer : The mole fraction of the total ions in an aqueous solution is 0.0248

Explanation :

First we have to calculate the moles of water.

Now we have to calculate the moles of magnesium ion and bromide ion.

As we are given that 0.4 moles of that means, there are 0.4 moles of magnesium ion and 0.8 moles of bromide ions.

Total mole of ions in an aqueous solution = 0.4 + 0.8 = 1.2 mole

Now we have to calculate the mole fraction of the total ions in an aqueous solution.

Therefore, the mole fraction of the total ions in an aqueous solution is 0.0248

The volume of a cube or box can be measured by multiplying its length, width, and height (length x width x height).

The units of measure for volume are cubic units, such as cubic centimeters.

Even at STP, water can exist under 0 deg C. it quite is stated as sub-cooling. there is an significant concern in aviation stated as rime icing. Rime is a white or milky opaque granular deposit of ice. It occurs whilst supercooled water droplets strike an merchandise at temperatures at or under freezing.

A pure substance is something that is not mixed with anything like like a jar of rice or a jar of marbles
A mixture is something that is mixed together like if you made lemonade and you mixed lemon juice and water and sugar together it's a mixture and another example is if you mix sand and rocks together it's a mixture I hope I helped you

It's nonpolar covalent

THE MASS OF 2.5 IS THE AMOUNT OF THE LINER EQUITATION SO DIVIDE 2.5 INTO 23 GRAMS AND MULTIPLY YOUR PROFIT BRO BTW IM NOT A COP SO STAY COOL MY FRIEND

I believe it is the pressure

I think it is Mercury

I think it's false because they travel in an elliptical pattern around the sun. There are some comets that travel in a 'v' shape.

Answer:

22.48 grams.

Explanation:

In order to calculate this you just need to remember the formula for the density of materials, the density of Acetone is: 0.791 g/mL

So in order to calculte the mass we just use the next formula:

Density= mass/volume

Remember that mililiters is a unit for vulome:

Mass= Volume*density

We insert the values:

28.42*0.791ml=22.48 grams

So the mass og 28.42 mililiters of acetone will be 22.48 grams

the answer isn't A, it is D, You would have the same mass on the Earth and moon

A 
dont ask how
anyways 
abcdefghijklmnopqrstuvwxyz now I know my ABC whatever the rest of the lyrics are

stage 1: The thylakoid captures light energy.

That part of the solar system is the sun.  Of all the mass in
the total solar system, more than 99% of it is in the sun.

In order to solve, take the total and times the percentage: 

200 x 0.12 = 24 < 24 represents the number of baseballs that HAD defects.

To find which ones did not have defects, subtract 200-24, which is 176.

Answer: 176 

The answer is C since the hotter it gets the more rapidly the molecules move

It should be sunlight . .

The name of that is called Carbonate

Answer: 91.29 grams

Explanation:

Endothermic reactions are those chemical reactions in which heat is absorbed by the reactants.

According to stoichiometry,

3352 kJ of energy is absorbed by  2 moles of

Thus 1500 kJ of energy will be absorbed by= of

Mass of

The answer is True :))

A and I can be bond to create molecule

The correct answer is:

C. The speed of the wave will increase.

What will most likely happen if she increases the temperature in the room is the speed of the wave will increase.

The nuclear equation that describes the alpha decay of Polonium-210 can be written like this:
210/
84Po→206/82Pb+4/2 He

Natural selection makes it so that an organism from a species has a better chance of surviving than an organism in the same species, but with different traits. Survival of the fittest proves that certain traits can help an organisms survive better than its peers. For example, say there was an allele that made bears have thicker fur than others. The year-round climate is extremely cold. The bears with thicker fur are more likely to survive due to the warmth their fur provides and will have more offspring. The bears with thinner fur will die more often and not produce healthy offspring due to the frigid temperature. Eventually, the allele for thin fur will die out because the bears with these alleles cannot survive in their habitat.

Fluorine is the most electronegative. So as the elements move further away, the less electronegative they are.. generally. So Nitrogen is less electronegative than Oxygen. And Bromine is less electronegative than Chlorine. As the periodic table moves towards the upper right corner towards Fluorine, the more electronegative the element.

I can tell that you got this right because it has to be a certain size and it is .
            great job!

The correct answer is option b, that is, it is upside down.  

A concave lens refers to a lens, which exhibits at least one surface that curves inwardly. It is a diverging lens, that is, it disperses out the rays of light, which have been refracted via it. A concave lens is thinner in the middle in comparison to its edges and is used in the correction of myopia.  

If the concave lens is used to observe the image of the bird, then the image will possibly be observed upside down.  

Answer: Option (d) is the correct answer.

Explanation:

Magnetic force is the force which acts from one charged object to another charged or neutral object.

This force acts at a certain distance and if the charged objects are oppositely charged then they attract each other. When the charged objects have same charge then the objects repel each other.

Thus, we can conclude that a force that acts at a distance best describes the magnetic force.

Single replacement means only 1 will bond. Ag + KNO3 --> AgNO3 + K
Just a rough sketch

Increases
I need to write more to post this so yea