Answer: The correct option is b.
Explanation: Chemical reaction is a reaction i which the chemical composition of the reactants gets changed and new substances having different chemical composition is formed. This reaction cannot be reversed by any physical means.
Indicators showing chemical changes are :
- Color change
- Characteristic odor
- Formation of bubbles
- Formation of precipitate
From the given information above, it can be stated that the correct option is b.
Answer: B!
Explanation: In the direction opposite of the direction of the applied force.There is no force in the other side being applied.
Answer:Temperature Effects on Density. Density is a physical property of substances that compares the relationship between volume and mass. Density is affected by temperature because as temperature increases so does the kinetic energy of the particles.
Explanation:
385 L is the volume of the air mattress with 0.55 moles of air inside the mattress and a temperature of 295 K.
<h3>What is an ideal gas equation?</h3>
The ideal gas law (PV = nRT) relates to the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).
Using the gas law,
PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.
Given data:
P= 3.5 kPa
V=?
n= 0.55 moles of air
T= 295K
R= 8.314 (L kPa/mol K)
Putting value in the given equation:
V= 
V = 
V = 385.4132857 L
And whatever the significant figure is asked for, for example, 3 significant figures: the answer would be 385 litres.
Hence, 385.4132857 L is the volume of the air mattress.
Learn more about the ideal gas here:
brainly.com/question/27691721
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Answer:
Saponification is a process of mixing triglycerides with potassium hydroxide (lye) in order to produce fatty acid and glycerol also known as soap.
During this experiment, many errors can occurs which are following;
- Incorrect measurement of both the salts that combine to form soap.
- The beaker and the stirrer has residue of some other chemical that gets mixed with two components and reacts.
- The two products are not mixed well or not long enough to reach the end product.
- The temperature is not favorable.
- The resting period is not calculated properly
I hope the answer is helpful.
