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3 years ago

Why is atmospheric pressure much lower on the top of a mountain than it is as sea level?

2 answers:

5 0

The atmospheric pressure lowers as you move up the top of a mountain because the air thins the air you go.
So the weight of the air reduces, and the force the air is able to exert reduces and hence the atmospheric pressure reduces as well.

Vika [28.1K]3 years ago

3 0

Because the gravity levels decrese and so does the oxygen levels

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Initially, scientists described atoms as the smallest particles of matter. However, smaller particles within atoms were discover

g100num [7]

Answer:

By designing new technology that would prove new information

Explanation:

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3 years ago

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Describe Write your own caption for this photo.

koban [17]

Answer:

Sit by the fire to warm up

Explanation:

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2 years ago

This diagram shows the forces acting on a car. The center dot represents the car, and the arrows represent the forces acting on

Mariulka [41]

Answer : The correct option is B- Towards the left.

Solution : Given,

Force on car in upward direction, $F_1$ = 6000 N

Force on car in downward direction, $F_2$ = 6000 N

Force on car in right direction, $F_3$ = 5000 N

Force on car in left direction, $F_4$ = 6000 N

Force : Force is equal to the mass multiplied by the acceleration. The force is directly proportional to the acceleration.

Formula : F = m × a

where, F is force, m is mass and a is acceleration.

From the given diagram we conclude that the $F_1$ and $F_2$ are in opposite direction and the force acting on car are same. So, their net force is zero.

And in case of $F_3$ and $F_4$ , the net force will not be zero because force acting on car are different. The car will accelerate towards left direction because $F_4$ is higher than the $F_3$ .

So, the car will accelerate towards left direction.

3 0

2 years ago

Nicotine is 74.1% carbon, 8.6% hydrogen, and 17.3% nitrogen by mass. What is its molecular formula if its molar mass is 162.26 g

WINSTONCH [101]

first we need to find the empirical formula of nicotine

empirical formula is the simplest ratio of whole numbers of elements making up a compound

the percentage compositions for each element has been given. So we can calculate for 100 g of the compound.

masses of elements and the number of moles

C - 74.1 g - 74.1 g/12 g/mol = 6.17 mol

H - 8.6 g - 8.6 g / 1 g/mol = 8.6 mol

N - 17.3 g - 17.3 g / 14 g/mol = 1.23

divide all by the least number of moles

C - 6.17 / 1.23 = 5.01

H - 8.6 / 1.23 = 6.99

N - 1.23 / 1.23 = 1.00

when the atoms are rounded off to the nearest whole numbers

C - 5

H - 7

N - 1

empirical formula is C₅H₇N

we have to find what the mass of 1 empirical unit is

mass - 5 x 12 g/mol + 7 x 1 g/mol + 14 g/mol = 81 g

molecular mass is 162.26 g/mol

we have to find how many empirical units make up 1 molecule

number of empirical units = molecular mass / mass of 1 empirical unit

= 162.26 g/mol / 81 g = 2.00

there are 2 empirical units

molecular formula is - 2 (C₅H₇N)

molecular formula - C₁₀H₁₄N₂

4 0

3 years ago

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How many moles of water are produced from 32 grams of methane?

aleksklad [387]

Answer:

4 moles

Explanation:

$n_{CH4}$ = $\frac{32}{16}$ = 2 (moles)

CH4 + 2O2 → CO2 + 2H2O

1 : 2 : 1 : 2

2 (moles)

⇒ $n_{H2O}$ = 2 × 2 ÷ 1 = 4 (moles)

4 0

2 years ago