Question 20 a raindrop has a mass of 50.mg and the pacific ocean has a mass of ×7.081020kg .

Asked by maham237 @ 28/11/2020 in Chemistry viewed by 468 People

Question 20 a raindrop has a mass of 50.mg and the pacific ocean has a mass of ×7.081020kg . use this information to answer the questions below. be sure your answers have the correct number of significant digits.

Answered by maham237 @ 28/11/2020

The questions you can answer are

1) what is the mass of one mole of raindrops?, and

2) How many moles of raindrops are in the pacific ocean

Solutions:

1) what is the mass of one mole of raindrops?

mass = number of rain drops * mass of on rain drop

The number of rain drops in one mole of rain drops is 6.02 * 10^23

So, the mass of one mole of rain drops is

6.02 * 10 ^ 23 rain drops * 50. mg * (1 kg / 1,000,000 mg) = 3.01 * 10^ 19 kg

The correct number of significant digits is 2, because 50. mg has two signficant digits, so the answer must be shown as 3.0 * 10^ 19 kg.

2) How many moles of raindrops are in the pacific ocean

Use the proportion 1 mol / 3.0 * 10^19 kg = x mol / 7.08 * 10^20 kg

And you solve for x:

x = (7.08 * 10^20 kg) * 1 mol / (3.0 * 10^19 kg) = 2.36 * 10 = 23.6 moles

Which rounded to two significant digits is 24 moles of rain drops.

A raindrop has a mass of 50.mg and the pacific ocean has a mass of ×7.081020kg .

Asked by maham237 @ 29/11/2020 in Chemistry viewed by 316 persons

use this information to answer the questions below. be sure your answers have the correct number of significant digits.

Assuming the mass of an average cell is ten times the mass of a bacterium (which is 10-15 kg):

Asked by maham237 @ 26/12/2020 in Biology viewed by 432 persons

(a) Calculate the number of cells in a hummingbird assuming the mass of an average cell is ten times the mass of a bacterium. (b) Making the same assumption, how …

A shell of mass 20 kg at rest explodes

Asked by admin @ 17/08/2021 in Physics viewed by 388 persons

3. A shell of mass 20 kg at rest explodes into twofragments whose masses are in the ratio 2 : 3.The smaller fragment moves with a velocity of …

A spherical ball of mass 20 kg is stationary

Asked by admin @ 17/08/2021 in Physics viewed by 305 persons

A spherical ball of mass 20kg is stationary at the top of a hill of height 100m.It rolls down a smooth surface to the ground and then climbs up another …

A meteorite of mass 1500 kg moves with a speed of 0.700 c . find the magnitude of its momentum p.

Asked by maham237 @ 25/12/2020 in Physics viewed by 360 persons

A. A meteorite of mass 1500kg moves with a speed of 0.700c . Find the magnitude of its momentum p.Express your answer in kilograms times meters per second to three …

Much man-made solid waste can be rapidly recycled by incineration in landfills by dumping it in the ocean

Asked by maham237 @ 14/01/2021 in Health viewed by 325 persons

The molar enthalpy of fusion for water is 6.008 kj/mol. what quantity of energy is released when 253g of liquid water freezes? (molar mass of water is 18.02 g/mol)

Asked by maham237 @ 10/01/2021 in Physics viewed by 334 persons

How did vasco nunez de balboa discover the pacific ocean

Asked by admin @ 26/11/2021 in History viewed by 233 persons

HELP!!! 100 POINTS!!! Vasco Nunez de Balboa crossed from the Atlantic Ocean to the Pacific Ocean using a land route that he was the first European to find. Why was …

Why did vasco nunez de balboa discover the pacific ocean

Asked by admin @ 22/11/2021 in History viewed by 255 persons

What was the significance of Vasco Núñez de Balboa’s sighting of the Pacific Ocean?

A solid sphere of mass 2 kg is resting

Asked by admin @ 23/08/2021 in Physics viewed by 306 persons

A solid sphere of mass 2 kg is resting inside a cube as shown in the figure. The cube is moving with a velocity v = . Here t is …

A block of mass 10 kg moving with acceleration

Asked by admin @ 23/08/2021 in Physics viewed by 466 persons

43. A block of mass 10 kg, moving with acceleration 2 m/s2 on horizontal rough surface is shown in figure → a= 2 m/s> F= 40 NThe value …

A block of mass root 2 kg is released

Asked by admin @ 23/08/2021 in Physics viewed by 330 persons

A block of mass root 2 kg is released from the top of an inclined smooth surface as shown in fig. if spring constant of spring is 100n/m and block …

A bullet of mass 0.01 kg is fired horizontally

Asked by admin @ 23/08/2021 in Physics viewed by 338 persons

A bullet of mass 0.01 kg is fired horizontally into 4kg wooden block at rest on a horizontal surface. the coefficient of kinetic friction between the block and the surface …

An infinite number of masses each of one kg

Asked by admin @ 20/08/2021 in Physics viewed by 334 persons

Infinite number of masses, each of 1 kg, are placed along the x-axis at x = +- 1m, +- 2m, +-4m, +- 8m, +- 16m.. The gravitational of the resultant …

A solid cylinder of mass 3 kg is rolling

Asked by admin @ 20/08/2021 in Physics viewed by 478 persons

A solid cylinder of mass 3kg is rolling on a horizontal surface with velocity 4ms-1 .it collides with a horizontal Spring of force constant 200 Nm-1. The maximum compression produced …