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Determine the change in volume that takes place when 1.95-L sample of N2g is heated from 250.0 K to 442.2 K?
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When a liquid is heated how does its volume change?
When a gas is heated, its' volume increases.
Why does the density of a substance not change with the sample size?
Density = mass / volume As sample size increases, both mass and volume increase in the same ratio.
What solvent would you use to determine the density of magnesium nitrate?
To determine the density, you need to know the volume of a known mass of substance. To find the mass, just weigh out a sample. To determine the volume of a sample, a common method is to put some liquid in a graduated cylinder and record the volume. Then add the weighed sample (in this case MgNO3), and then record the new volume. Subtract the original volume from the new one, and the difference is the volume of the solid. To do this, accurately, the solid must be completely insoluble in the liquid. And so the liquid should not really be a solvent at all! For an ionic compound MgNO3, using a non-polar organic solvent (such as hexane) should ensure essentially zero solubility.
In determining volume by displacement why is it important that there are no air bubbles adhering to the solid?
It affects the volume of the sample. Your results will be affected because volume is the factor you are trying to determine. Air bubbles displace water just like anything else.
What property like volume depends of the size of the sample?
The volume and the mass of sample both depend on the size of the sample.A small sample has small volume and small mass, a big sample has big volumeand big mass. But the ratio of mass to volume is constant for a pure sample ofa substance, no matter what size the sample is. That ratio is called the densityof the substance.
Does the volume of an object change if heated?
The volume of a substance increases when heated
A sample of zinc is placed in a graduated cylinder. The initial volume of water= 15.0mL and final volume of water and sample= 24.0mL. Determine the mass of the sample of zinc?
what?
When a liquid is heated how does its volume change?
When a gas is heated, its' volume increases.
How does the volume and density of a substance change when it is heated?
The volume of a substance increases when heated, causing a decrease in density.
How do you determine the concentration of ascorbic acid in unknown sample?
first measure the volume of the sample solution needed to change the blue color of the DCPIP solution into colourless. then, weigh the mass of the sample solution. finally calculate the concentration by using the formula: volume required t change the color of DCPIP solution (dm) per mass of the sample solution (g)
Why does the density of a substance not change with the sample size?
Density = mass / volume As sample size increases, both mass and volume increase in the same ratio.
How can volume change if a substance undergoes a chemical change?
If a substance undergoes a chemical change, its properties change. For example, water, when heated turns into a gas which has a higher volume.
Why is a conical cap provided to a pycnometer?
A conical cap is provided to a pscnometer to determine the volume of the test sample.
What is an increase in an objects volume when its heated?
Perhaps coincidentally, that physical change is called "expansion".
How would you determine the density of a powdered dry sample which soluble in water?
1. Apparent density: - weight a graduated cyllinder - put the sample in the graduated cyllinder up to a given volume (note this volume) - weight the graduated cyllinder with the sample - calculate the mass of the powder by difference - the density is the ratio mass of the sample/volume of the sample 2. True density of a powder: you need a helium pycnometer.
A sample of At gas occupies a volume of 1.2 L at 125 C and a pressure of 1.0 atm. Determine the temperature, In degrees Celsius at which the volume of the gas would be 1.0 L at the same pressure?
A sample of Ar gas occupies a volume of 1.2 L at 125°C and a pressure of 1.0 atm. Determine the temperature, in degrees Celsius, at which the volume of the gas would be 1.0 L at the same pressure.
Will the volume of metal decrease if it is heated?
No, the volume of a metal increases as it is heated. It expands.
