How to Calculate the Total Mass of Sodium Chloride in Seawater?

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In summary, the conversation discusses calculating the total mass of sodium chloride in seawater given its volume and density. The solution involves converting the given values and using the density formula to obtain the mass of seawater, followed by calculating the mass of sodium chloride using its percentage by mass in seawater.
  • #1
elw555
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Homework Statement



The total volume of seawater is 1.5 10^21 L. Assume that seawater contains 3.1 percent sodium chloride by mass and that its density is 1.03 g/mL. Calculate the total mass of sodium chloride in kilograms and in tons. (1 ton = 2000 lb; 1 lb = 453.6 g)

Homework Equations



D=m/v
m=d x v


The Attempt at a Solution



1.5 x 10^21 x .031= 61324931.65 g/L

61324931.65x .001=61324.93165kg ?
 
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  • #2
You want mass of seawater first. Use the density of seawater and the volume of seawater to obtain the mass of seawater.

The first step which YOU showed gives the wrong units. Look at the units involved there: Liters x mass/mass
 
  • #3
Hi
Your method is right .Only one conversion is wrong 1Kg = 1000g
1L = 1000ml
density =1.03 g/mL = 1.03 Kg /L
you can use it straight here
 
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FAQ: How to Calculate the Total Mass of Sodium Chloride in Seawater?

What is the purpose of converting units in chemistry?

In chemistry, units are converted to ensure accuracy and consistency in measurements. Different units may be used for the same quantity, and converting units allows for easier comparisons and calculations.

How do you convert between units in chemistry?

To convert between units, you can use conversion factors or dimensional analysis. Conversion factors are ratios that relate two different units of measurement for the same quantity. Dimensional analysis is a method of setting up and solving conversion problems using the units as a guide.

What are some common units used in chemistry?

Some common units used in chemistry include grams (g) for mass, liters (L) for volume, and moles (mol) for amount of substance. Other commonly used units include meters (m) for length, seconds (s) for time, and Kelvin (K) for temperature.

What is the difference between metric and imperial units in chemistry?

Metric units are based on the International System of Units (SI) and are used in most scientific fields, including chemistry. Imperial units, also known as the British system, are primarily used in the United States and are based on historical measurements. The main difference between the two is that metric units are based on factors of 10, making conversions simpler and more consistent.

Why is it important to use correct units in chemistry?

Using correct units is crucial in chemistry because it ensures accuracy and allows for meaningful comparisons and calculations. It also helps to communicate results and data effectively to others in the scientific community.

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