CHEMISTRY HIGH SCHOOL

Compare the shape and volume of solids, liquids and gases.

Answers

Answer 1
Answer: Solids have both fixed volumes and fixed shapes. 
Liquids have fixed volumes, but their shapes depend upon the containers in which they are held. 
Gases have neither fixed volumes nor fixed shapes, and expand to fill their containers.

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The mass of a proton is equal to the mass of?

Answers

It is about equal to the mass of the neutron. So, most people just say that they have the same mass.

*Hope that helps and enjoy Brainly :)*
The answer would be neutron. Well, they do not have the exact same mass, only a difference of about 0.98 or even less than that. So they are counted as equals. 

Carbon can bond with other carbon atoms to produce cyclic hydrocarbon structures.TRUE

FALSE

Answers

Answer:

The answer is True

Explanation:

Cyclic hydrocarbons are organic compounds that consist of carbon and hydrogen atoms that bond to form rings or cyclic structures. The simplest are cycloalkanes, hydrocarbons formed by a closed carbon chain with all the simple bonds.

There is a very special group of cyclic hydrocarbons called aromatic hydrocarbons. Its name is due to the fact that the first to be discovered had pleasant smells. They all start from a basic structure that can be repeated many times. An example of this type of hydrocarbon is bancene.

The statement about "Carbon can bond with other carbon atoms to produce cyclic hydrocarbon structures" is true. Carbon can also bond with other four atoms because of its outer shell (valence shell) that has four electrons. This is the reason why organic molecules can be so large because of this bonding. 

A sample of gas is held at constant pressure. Increasing the Kelvin temperature of this gas sample causes the average kinetic energy of its molecules to(1) decrease and the volume of the gas sample to decrease
(2) decrease and the volume of the gas sample to increase
(3) increase and the volume of the gas sample to decrease
(4) increase and the volume of the gas sample to increase

Answers

Increasing the temperature of a gas sample means that heat energy is been supplied to the System. When energy is been supplied heat energy is transformed into kinetic energy of the gas molecules.
Therefore kelvin temperature increases means more energy given to the system therefore average kinetic energy of molecules increase.
When the kinetic energy of molecules increase they move about more and take up more space. Hence volume too increases.
Therefore the correct answer is
4) average kinetic energy of molecules increase and volume of the gas sample increases
The answer is (4). When the pressure is constant, he temperature increasing can cause both the average kinetic energy of its molecules and the volume of gas sample increase.

2 points) Now they feel it is best to have you identify an unknown gas based on its properties. Suppose 0.508 g of a gas occupies a volume of 0.175 L at a temperature of 25.0◦C is held at a pressure of 1.000 atm. What gas is this most likely?

Answers

Answer: chlorine gas

Explanation:

mass = 0.508 g volume = 0.175 L

From ideal gas equation.

PV = nRT

(1.0 atm) × (0.175 L) = n × [0.0821 atm L / (mol K)] × [(273.2 + 25.0) K]

n = 1.0 × 0.175 / (0.0821 × 298.2) mol

n = 0.00715 mol

Molarmass= mass/mole

Molar mass of the gas = (0.508 g) / (0.00715 mol) = 71.0 g/mol

The molar mass of Cl₂ (chorine) = 35.5 × 2 g/mol = 71.0 g/mol

Hence, the gas is chlorine.

ENRICHMENT WORKSHEET INTEGRATING Jesse Owens in the 100 Meter Dash Read the following paragraph and complete the exercises below. Jesse Owens was an outstanding American athlete who held or shared several world records in track and field. He won four gold medals at the 1936 Olympic Games in Berlin, Germany. One of these medals was for the 100 m dash, in which Owens tied the Olympic record with a time of 10.3 s. Exercises 1. Using the data in the first two columns of the table below, plot a graph of distance versus time for a sprinter in the 100 m dash. Timeout distance I Average speed A0/55 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 100 4 10 18 27 37 48 59 71 83 96 100 Distance (m) 100 90 80 70 60 50 40 30 20 MATHEMATICS 10- 0 AS 0 1 2 3 4 5 6 7 8 9 10 Time (s) ÷ 2. Look at the graph, and identify the point where the graph appears to have the steepest slope. Describe what this tells you about the motion of the sprinter.​

Answers

Answer:

Therefore, the steepest slope in the graph indicates that the sprinter is experiencing a rapid increase in speed during the early stages of the race. This suggests that Jesse Owens had a powerful start and was able to accelerate quickly in the 100m dash.

Explanation:

Based on the graph provided, the point where the graph appears to have the steepest slope is around the 2-second mark.

The steep slope in the graph represents the sprinter's acceleration during the initial phase of the race. In the 100m dash, sprinters aim to reach their top speed as quickly as possible. The steeper the slope, the faster the sprinter is accelerating.

Physical or chemical change? what gave you the idea that it was such?​

Answers

Answer:

chemical change

Explanation:

signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.

Give me brainliest plz

Answer:

Chemical change

Explanation:

because it tranformed into something else
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