What is the affect of increasing the water's mass?how does it reflect it's temperature?

Answers

Answer 1

Answer: I assume what you're asking about is, how does the temperature changes when we increase water's mass, according the formula for heat ?
Well the formula is : $Q=m\cdot c\cdot \Delta t$ (where Q is heat, m is mass, c is specific heat and $\Delta t$ is change in temperature. So according this formula, increasing mass will increase the substance's heat, but won't effect it's temperature since they are not related. Unless, if you want to keep the substance's heat constant, in that case when you increase it's mass you will have to decrease the temperature

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A student analyzed an unknown sample that contained a single anion. The sample gave a white precipitate upon addition of a solution of AgNO3 which dissolved in ammonia. Which anion is present in the unknown solution? Write the corresponding net ionic equation.

Answers

Answer:

Chloride ion

Explanation:

The anion present in the unknown solution would be chloride ions.

A white precipitate of silver chloride is usually formed when drops of silver nitrate are added to a solution containing chloride ions. The ionic equation is as below:

$Cl^- (aq) + Ag^+ (aq) --> AgCl (s)$

Gas produced from a reaction is a phase change and not a chemical change. a. True
b. False

Answers

Answer: The given statement is false.

Explanation:

A chemical reaction is a reaction which brings change in chemical composition of reactants resulting in formation of new compounds which have different chemical properties.

For example, $Zn + H_(2)SO_(4) \rightarrow ZnSO_(4) + H_(2)$

So, when gas is produced in a chemical reaction then it means new compounds are formed due to breakage of old bonds and formation of new bonds.

Thus, we can conclude that the given statement gas produced from a reaction is a phase change and not a chemical change, is false.

False I believe.
Hope I've done my duty!

What location is 90 degrees away from the equator?A) The south pole
B) Polaris
C) Both A & B
D) The north pole

Answers

C) both A and B

Each parallel measures one degree north or south of the Equator, with 90 degrees north of the Equator and 90 degrees south of the Equator
Hope this helps!

Answer:

C) Both A and B

Explanation:

The axis of 0 degrees latitude is known as the Equator. With 90 degrees north of the Equator and 90 degrees south of the Equator, each parallel measures one degree north or south of the Equator. The North Pole is 90 degrees north latitude, and the South Pole is 90 degrees south latitude.

Chemical reactions can be detected by changes in

Answers

Chemical reactions can be detected by some of these changes:
1. change of color
2. formation of a solid
3. formation of gas
4. exchange of heat with surroundings

In the reaction C + 02 - CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction? O 18 g O 54 g O 72 g 0 90 g

Answers

Mass of oxygen : 54 g

Further explanation

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

Reaction

$\tt C+O_2\rightarrow CO_2$

mass before reaction = mass after reaction

mass C + mass O₂= mass CO₂

$\tt 18~g+mass~O_2=72~g\n\nmass~O_2=72-18=\boxed{\bold{54~g}}$

How many significant figures are in the measurement 0.020 km?

Answers

2 significant figures (if that means #s) .02

Final answer:

The measurement 0.020 km has two significant figures, which are '2' and '0' after '2'.

Explanation:

The number of significant figures in a number refers to the digits that carry meaning and contribute to the accuracy of the measurement. In the given measurement of 0.020 kilometers, there are two significant figures. These are the digits '2' and '0' located immediately after the '2'.

The zeros before these numbers, such as in '0.020 km', are not significant figures because they simply indicate the position of the decimal point, and they do not contribute to the precision of the measurement.

Learn more about Significant Figures here:

brainly.com/question/37022020

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