Specific protocol should be followed any time a balance is used to weigh the mass of a chemical or object.Select which rule(s) are part of this protocol.All of these rules are part of the protocol.Glassware, containers, and chemicals should be at room temperature.The same balance should be used throughout an experiment.Glassware must be dried thoroughly before being weighed and all chemicals should be contained in either a piece ofglassware or weighboat.All chemicals should be contained in either a piece of glassware or weighboat.Filter paper must be completely dry, even after being used in an experiment.Glassware must be dried thoroughly before being weighed. Why should the selected rule(s) be followed?Weighing wet items will cause the displayed mass to be greater than the actual mass of the object.A residue left on the balance will contaminate the balance pan surface and anything that comes into contact with itafterwards.There may be discrepancies in accuracy between individual balances.Objects at any temperature other than room temperature can create air currents which can affect the balance pan,causing the measured mass to be higher or lower than the true mass.

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Chemistry: Matter and Change

1st Edition

ISBN:9780078746376

Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom

Chapter1: Introduction To Chemistry

Section: Chapter Questions

Problem 12STP

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Specific protocol should be followed any time a balance is used to weigh the mass of a chemical or object.
Select which rule(s) are part of this protocol.
All of these rules are part of the protocol.
Glassware, containers, and chemicals should be at room temperature.
The same balance should be used throughout an experiment.
Glassware must be dried thoroughly before being weighed and all chemicals should be contained in either a piece of
glassware or weighboat.
All chemicals should be contained in either a piece of glassware or weighboat.
Filter paper must be completely dry, even after being used in an experiment.
Glassware must be dried thoroughly before being weighed.

Why should the selected rule(s) be followed?
Weighing wet items will cause the displayed mass to be greater than the actual mass of the object.
A residue left on the balance will contaminate the balance pan surface and anything that comes into contact with it
afterwards.
There may be discrepancies in accuracy between individual balances.
Objects at any temperature other than room temperature can create air currents which can affect the balance pan,
causing the measured mass to be higher or lower than the true mass.

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Why should the selected rule(s) be followed?

A residue left on the balance will contaminate the balance pan surface and anything that comes into contact with it afterwards.

There may be discrepancies in accuracy between individual balances.

Objects at any temperature other than room temperature can create air currents which can affect the balance pan, causing the measured mass to be higher or lower than the true mass.

Weighing wet items will cause the displayed mass to be greater than the actual mass of the object.

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