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2 years ago

Scientific laws commonly answer which questions about the world?

Chemistry

1 answer:

borishaifa [10]2 years ago

4 0

Answer:

How

Explanation: In science a person has to be curious on how things work. Key word how. Why makes sense but how is the better answer. How many is a specific question. But it doesn't involve the whole spectrum of science. What also doesn't make sense.

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What pressure, in atmospheres, is exerted on the body of a diver if he is 38 ft below the surface of the water when atmospheric

Talja [164]

The pressure of diver = atmospheric pressure + water pressure

atmospheric pressure = 750 mmHg (as given) = 750 / 760 atm = 0.987 atm

Water pressure is

P = hρg

where

h = height of water = 38 ft

1 ft = 0.3048

38 ft = 11.58 m

ρ = density = 1000 Kg / m³

g = gravitational constant = 9.81 m/s2

P = 11.58 X 1000 X 9.81 = 113599.8 Kg / m s^2 Or N /m^2

1 N / m^2 = 1 pa = 9.869 X 10^-6 atm

P = 113599.8 Pa = 1.12 atm

Total pressure = 1.12 + 0.987 atm = 2.107 atm = 2.1 atm (two significant figures)

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3 years ago

Please help i will mark brainlist

Sphinxa [80]

Answer:

V= 21 cubic cm (( I am not sure about density ))

Explanation:

V= L×W×H

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2 years ago

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Which unit is commonly used for measuring pressure? O m3 O bar O N/m3 O Celsius

juin [17]

Answer:

Explanation:

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2 years ago

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An Element X has been discovered. Element X forms an Xt ion and

DanielleElmas [232]

Answer: The chemical symbol of the compound formed is $XCl$ or $NaCl$

Explanation:

An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).

The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.

Element X has the atomic number 11 which is sodium. The electronic configuration of it is $1s^22s^22p^63s^1$

This element will lose 1 electron to form $X^+$ ion of $Na^+$

Chlorine has the atomic number 17. The electronic configuration of it is $1s^22s^22p^63s^23p^5$

This element will gain 1 electron to form $Cl^-$ ion

When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of $XCl$ or $NaCl$

Hence, the chemical symbol of the compound formed is $XCl$ or $NaCl$

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2 years ago

When astronomers observe distant galaxies, they can tell the most of them are moving away from one another. In addition, the mor

KiRa [710]

It could be because something much larger that we have yet to discover is pulling objects to it like a black hole of something else that we can't see with the human eye.

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3 years ago