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KIM [24]
3 years ago
9

Explain ways friction helps us or makes things easier in our daily life. Explain the effect of friction for each. Make sure you

explain the effect of friction for each example !
( i need three examples )
Chemistry
1 answer:
blsea [12.9K]3 years ago
8 0
Friction helps us stand where we are. the friction between our shoe and the floor keeps us upright. without friction we would be sliding all over the place

friction helps obvjects stay where they are also. without friction objects would constantly be sliding around as there would be no force to hold them in place.

friction helps cars to travel the way they do. without friction cars would be sliding on the road as there would be no friction between the wheels and the road. notice how when the surface is icey, cars are more likely to collide. this is because there is less friction since it depends on the type of surface. friction prevents cars from colliding and causing accidents

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In the reaction BaCO3 + 2HNO3 + Ba(NO3)2 + CO2 + H2O, what mass of Ba(NO3)2 can be formed by combining 55 g BaCO3 and 26 g HNO3
Nataliya [291]

From the stoichiometry of the reaction, the mass of barium nitrate produced is 54.9 g.

<h3>Stoichiometry</h3>

The term stoichiometry refers to mass - volume relationships. Stoichiometry can be used to calculate the amount, mass or volume of reactants and products from the balanced reaction equation.

The equation of the reaction is written as follows;

BaCO3 + 2HNO3 ------>  Ba(NO3)2 + CO2 + H2O

Number of moles of BaCO3  = 55 g/197.34 g/mol = 0.28 moles

Number of moles of HNO3 = 26 g/63.01 g/mol = 0.41 moles

From the reaction equation;

1 mole of BaCO3 reacts with 2 moles of HNO3

0.28 moles of BaCO3 reacts with 0.28 moles ×  2 moles/1 mole = 0.56 moles

There is not enough HNO3 hence it is the limiting reactant.

Number of moles of Ba(NO3)2 produced  is obtained from;

2 moles of HNO3  yields 1 mole of Ba(NO3)2

0.41 moles of HNO3  yields 0.41 moles × 1 mole/2 moles

= 0.21 moles of Ba(NO3)2

Mass of  Ba(NO3)2  = 0.21 moles  × 261.337 g/mol = 54.9 g

Learn more about stoichiometry: brainly.com/question/9743981

8 0
3 years ago
Many electrophilic aromatic halogenations require the presence of aluminum trihalide (halide-chloride or bromide) as a catalyst.
mixas84 [53]

Answer: The aluminium trihalide assists in the heterolytic bond fission of the bromine molecule.

Explanation:

The electrophilic aromatic bromination of acetalinide with molecular bromine requires the formation of Br+. This specie is formed when an Aluminum trihalide reacts with bromine. The Br-Br bond breaks heterolytically such that charged species are produced. This Br+ participates in the electrophilic aromatic substitution and AlX4- is formed where X4 shows a tetrahalide complex of aluminium

5 0
4 years ago
URGENTTTTT HELPPPP PLZZZ LAST TRYYY
algol13

Left Panel

A is an acid. Not the answer.

B is correct. That would be a base. But it is not an Arrhenius base. Keep reading.

C that is exactly what an Arrhenius base is.

D. No an acid of some sort would accept OH ions.

Right Panel

D is concentrated and it is also a weak base. Good cleaning fluid. Smells awful but it works.

8 0
3 years ago
19. What is Beryllium's spin ?
s2008m [1.1K]

Answer:

Nuclear properties

Naturally occurring beryllium, save for slight contamination by the cosmogenic radioisotopes, is isotopically pure beryllium-9, which has a nuclear spin of 3/2.Beryllium is alloyed with copper or nickel to make springs, gyroscopes, electrical contacts, spot-welding electrodes and non-sparking tools, according to the Royal Society of Chemistry. Other beryllium alloys are used in high-speed aircrafts and missiles, as well as spacecraft and communication satellites.

Explanation:

hope this helps if not let me know

5 0
2 years ago
Hurry 60 points<br><br> Can two green fish mate and have orange offspring? <br><br> why or why not
Mademuasel [1]

Answer: Yes

Explanation:

This simulates the way offspring are formed by sperm from the male fish combining randomly with eggs from the female fish.

4 0
3 years ago
Read 2 more answers
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