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Lesechka [4]
3 years ago
5

Question 6 Jackson visited the Grand Canyon with his family. He noticed that when he stood at the edge of the canyon and yelled

is brother's name, he could hear his brother's name being repeated. Which of the following best explains why Jackson was able to hear an echo of his brother's name?
A)Sound travels as a wave that can be refracted and reflected by the particles of air around the edge of the canyon creating an echo.
B) Sound travels as a wave that can be absorbed by the walls of the canyon and passed back to Jackson's ear creating an echo.
C)Sound travels as a wave that can be refracted by the walls of the canyon creating an echo.
D)Sound travels as a wave that can be reflected by the walls of the canyon back into Jackson's earn as an echo.​
Chemistry
1 answer:
Novosadov [1.4K]3 years ago
7 0

Answer:

c

Explanation:

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determine whether the aqueous solutions of each of the following salts will be acidic, basic, or neutral
eduard

KCl is neutral because KOH is a strong base and HCl is a strong acid

To determine if the salt is neutral, acidic or basic, determine how the salt was made, or from which acid and base it was derived. Once we have determined how the salt was made, determine if the acid and base are both strong, weak or one of each.  If both are strong (e.g. NaOH + HCl), then the salt (NaCl) is NEUTRAL.  If the base is strong and the acid is weak (KOH + HCN), then the salt (KCN) is BASIC.  IF the base is weak and the acid is strong (NH3 + HCl), then the salt (NH4Cl) is ACIDIC.  If both the base and the acid are weak (NH3 + CH3COOH), then then salt (CH3COONH4) will have a pH determined by which is stronger (the acid or the base) and this will depend on the Ka of the weak acid compared to the Kb of the weak base.

KCl is neutral because KOH is a strong base and HCl is a strong acid NaCN is generally basic because NaOH is a strong base and HCN is a very week acid. NH4NO3 is usually acid because HNO3 is a strong acid and NH4OH is a week base

CH3COONH4 is exactly neutral because both NH4OH ad CH3COOH are respectively week base and week acid. Moreover, the Ka of acetic acid is exactly equal to the Kb of NH4OH

To know about strong base.

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6 0
1 year ago
A 56 g sample of peanut oil has a volume of 60.9 cm³. Calculate the density of the peanut oil
aleksandr82 [10.1K]
Density = mass / volume. So you'd write it out as D = 56g / 60.9cm^3, giving you 0.9195 g/cm^3.
4 0
3 years ago
Read 2 more answers
Whats the answer to this
Natasha2012 [34]
I think the answer you have selected is right, I'm not sure tho
3 0
4 years ago
A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. This flame is used to melt a metal. Which
NISA [10]

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chemical energy into thermal energy

Explanation:

The reaction taking place is as follows

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In this reaction bonds present in acetylene is broken and new bond present in water and carbon dioxide are formed . In the whole process of bond breaking and bond formation , there is net loss of energy and that energy is released as heat energy .

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3 years ago
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Phoenix [80]

Answer:

cellular respiration

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