Water is a colorless and odorless liquid. It can exist in solid, liquid, and gas states. It boils at 100 degrees C and melts at 0 degrees C. Which option best describes this information?
A.
These are the physical properties of water.
B.
These are the chemical properties of water.
C.
These are the physical changes water undergoes.
D.
These are the chemical changes water undergoes.
E.
These are the molecular changes water undergoes.

Answers

Answer 1

Answer: C is the answer because it is telling you the rate at which it changes its physical properties.

Answer 2

Answer: B is de answer my brudda

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Look at the information in the chart and picture. What conclusion could you deduce from this information?

Answers

Answer:

Explanation:

From the given data on the table, I can easily say my weight is a function of the acceleration due to gravity at anywhere in the universe.

Weight is given as

W = mg

m is the mass and g is the acceleration due to gravity.

Weight for a mass of 65kg would be the heighest on the surface of jupiter and it would be lowest on merury and mars due to their low value of g.

Answer:

The conclusion is that the mass is independent of gravity. However, the weight depends on the gravity value.

Explanation:

We have a girl with a mass of 65 kg. The picture has the gravity value for different planets. Weight (W) of a body is the product between the mass (M) and the gravity (g).

W = M*g.

According to the information we can mention that the weight of the girl will vary in all the planets. The highest weight will be for the highest gravity value of Jupiter with 25.9 m/s2. The lowest weight will be for Mercury and Mars with a gravity value of 3.7 m/s2.

It is important to mention that the mass of the girl will be the same in all the planets. However, the weight will vary according to the gravity variations.

Finally, The conclusion is that the mass is independent of gravity. However, the weight depends on the gravity value.

23g of sodium reacted with 35.5g of chlorine. Calculate the mass of the sodium chloride compound formed.

Answers

Answer: The mass of sodium chloride formed will be 58.5 g

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For Sodium:

Given mass of sodium = 23 g

Molar mass of sodium = 23 g/mol

Putting values in equation 1, we get:

$\text{Moles of sodium}=(23g)/(23g/mol)=1mol$

For chlorine gas:

Given mass of chlorine gas = 35.5 g

Molar mass of chlorine gas = 71 g/mol

Putting values in equation 1, we get:

$\text{Moles of chlorine gas}=(35.5g)/(71g/mol)=0.5mol$

The chemical reaction for the formation of sodium chloride follows the equation:

$2Na+Cl_2\rightarrow 2NaCl$

By stoichiometry of the reaction:

2 moles of sodium reacts with 1 mole of chlorine gas.

So, 1 mole of sodium will react with = $(1)/(2)* 1=0.5mol$ of chlorine gas.

Thus, the formation of sodium chloride can be calculated by using any of the reactant.

By stoichiometry of the reaction:

2 moles of sodium produces 2 moles of sodium chloride.

So, 1 mole of sodium will react with = $(2)/(2)* 1=1mol$ of sodium chloride.

Now, calculating the mass of sodium chloride by using equation 1, we get:

Moles of sodium chloride = 1 mole

Molar mass of sodium chloride = 58.5 g/mol

Putting values in equation 1, we get:

$1mol=\frac{\text{Mass of NaCl}}{58.5g/mol}\n\n\text{Mass of NaCl}=58.5g$

Hence, the mass of sodium chloride formed will be 58.5 g

58.5 is the final mass of the compound as long as any gases the reaction causes to be

Which of these experimental designs could lead to bias?A) Two mice are given the choice between Swiss and American cheese.
B) Phil and Bart race down the street to determine who is the fastest.
Eliminate
C) A car company pays participants to test drive and evaluate their new auto.
D) A private company uses a random taste test of three different, unidentified soft drinks.

Answers

C is biased because the people were paid to evaluate the car. They are more likely to say better things about it than if they weren't paid.

I believe it is B. The meaning of bias is prejudice in favor or against someone or a group compared to another in an unfair way. Many can have a one sided opinion about something such as who is going to win the race. However, choosing different cheese is more of an opinion showing which they prefer more than being bias.

Similar organisms that are not related are an example of A. Natural selection
B. Convergent evolution
C. Divergent evolution
D. Common ancestor

Answers

The best answer here is " B. Convergent evolution". This describes the process whereby evolutionary pressures of the local environment in two unconnected areas converge to produce organisms that are similar. This may be because they have developed solutions to sourcing their nutrition from the same type of place eg ants in a nest preyed upon by mammals with specially adapted long tongues.

What are some physical and chemical changes that occur as a car ages?

Answers

The chemical changes that occur as a car ages are fading of paint due to sunlight. rusting on the chrome, corrosion of electrical wiring. Some physical changes that occur as a car ages are breaking of the handles and straps, wearing down of tyre, paint scratches.

A chemical change is one which brings change in the composition of the substance. In other words, it is such a change which forms a completely new substance or product. It is an irreversible change.

On the other hand, a physical change is one which brings structural change or change in appearance of a substance without changing its original composition. It is a reversible change.

To know more about chemical change here

brainly.com/question/23693316

#SPJ3

Answer:physical: a part falling off or changing a tire. chemical:rust

Explanation:

What is the volume of a liquid with a density of 5.45g/ml and a mass of 65g

Answers

you have to use the fact that d=m/v and solve for v (v=m/d). with that equation you just divide the mass of the liquid by the density of the liquid. When done correctly you should get 11.93 mL of liquid.

I hope this helps.

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