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Leona [35]
3 years ago
13

1. When you are underwater, sounds that you hear from above the water sound much quieter than when you are not underwater. Draw

a diagram of the reflection and transmission of sound waves that shows why this might be the case.
Chemistry
1 answer:
GuDViN [60]3 years ago
5 0

Answer:

Explanation:

the water make it sound different then above water

hop this helps

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What is the complete ionic equation for NaOHaq plus HCIaq equals H2OI plus NaCIaq?
OverLord2011 [107]

Answer:

Ionic equation:

Na⁺(aq) + OH⁻(aq) + H⁺(aq) + Cl⁻(aq)   →  H₂O(l) + Na⁺(aq) + Cl⁻ (aq)

Explanation:

Chemical equation:

NaOH(aq) + HCl(aq)   →  H₂O(l) + NaCl (aq)

Balanced chemical equation:

NaOH(aq) + HCl(aq)   →  H₂O(l) + NaCl (aq)

Ionic equation:

Na⁺(aq) + OH⁻(aq) + H⁺(aq) + Cl⁻(aq)   →  H₂O(l) + Na⁺(aq) + Cl⁻ (aq)

Net ionic equation:

OH⁻(aq) + H⁺(aq)    →  H₂O(l)

The  Cl⁻(aq)  and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

3 0
3 years ago
The number of kilograms of water in a human body varies directly as the mass of the body. upper a 93​-kg person contains 62 kg o
Bad White [126]

Answer;

56 kg of water


Solution;

Weight = 62 kg of water in 93 kg of a person

W=km

62=93k;

k=2/3

W=(2/3)84

=56 kg

Therefore; a 84-kg person will have 56 kg of water.

4 0
3 years ago
What is the molar mass of a molecule that contains one sodium atom, one oxygen atom, and one hydrogen atom?
GrogVix [38]

wherears one hydrogen atom has a mass of approximately 1 u ,1 mol of h atoms has a mass of approximately 1 gram and wherears one sodium atom has an approximately 1 gram and one sodium atom have approximate mass of 23 u

7 0
3 years ago
what is the work done by a bird pulling a worm from the dirt with a force of .05 N and a distance of .07 m
masya89 [10]
Hello!

Work=Force*Displacment

Work=.05N * .07m = .0035J

Any questions please feel free to ask. Thank you.
5 0
3 years ago
According to Le Chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a dire
shepuryov [24]

Answer:

its A reduces stress :)))

Explanation:

5 0
3 years ago
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