Need to be classified elemental Boron as one of the crystalline solid on the basis of following properties: high melting point (2300 о C), poor conductor of heat and electricity, insoluble in water, and very hard Concept Introduction: Crystalsare classified into various types as follows: Ionic, covalent, metallic, and molecular crystal. The type of crystal in which the solid is hard, brittle, and non-conducting in nature is known as ionic solid. It conducts electricity in aqueous solution. They have usually high melting points. The type of crystal in which the solid is very hard and a poor conductor is known as covalent solid. It does not conduct electricity in the solid state as well as in aqueous solution. Theyusually have high melting points. They have covalent bonds.
Need to be classified elemental Boron as one of the crystalline solid on the basis of following properties: high melting point (2300 о C), poor conductor of heat and electricity, insoluble in water, and very hard Concept Introduction: Crystalsare classified into various types as follows: Ionic, covalent, metallic, and molecular crystal. The type of crystal in which the solid is hard, brittle, and non-conducting in nature is known as ionic solid. It conducts electricity in aqueous solution. They have usually high melting points. The type of crystal in which the solid is very hard and a poor conductor is known as covalent solid. It does not conduct electricity in the solid state as well as in aqueous solution. Theyusually have high melting points. They have covalent bonds.
Definition Definition Large and very high-molecular-weight substances that consist of hundreds to thousands of repeating units. Polymers are also known as macromolecules. Number-average-molecular weight is the measuring system for the polymers.
Chapter 11, Problem 101AP
Interpretation Introduction
Interpretation:
Need to be classified elemental Boron as one of the crystalline solid on the basis of following properties: high melting point (2300о C), poor conductor of heat and electricity, insoluble in water, and very hard
Concept Introduction:
Crystalsare classified into various types as follows: Ionic, covalent, metallic, and molecular crystal.
The type of crystal in which the solid is hard, brittle, and non-conducting in nature is known as ionic solid. It conducts electricity in aqueous solution. They have usually high melting points.
The type of crystal in which the solid is very hard and a poor conductor is known as covalent solid. It does not conduct electricity in the solid state as well as in aqueous solution. Theyusually have high melting points. They have covalent bonds.
Lab Data
The distance entered is out of the expected range.
Check your calculations and conversion factors.
Verify your distance. Will the gas cloud be closer to the cotton ball with HCI or NH3?
Did you report your data to the correct number of significant figures?
- X
Experimental Set-up
HCI-NH3
NH3-HCI
Longer Tube
Time elapsed (min)
5 (exact)
5 (exact)
Distance between cotton balls (cm)
24.30
24.40
Distance to cloud (cm)
9.70
14.16
Distance traveled by HCI (cm)
9.70
9.80
Distance traveled by NH3 (cm)
14.60
14.50
Diffusion rate of HCI (cm/hr)
116
118
Diffusion rate of NH3 (cm/hr)
175.2
175.2
How to measure distance and calculate rate
For the titration of a divalent metal ion (M2+) with EDTA, the stoichiometry of the reaction is typically:
1:1 (one mole of EDTA per mole of metal ion)
2:1 (two moles of EDTA per mole of metal ion)
1:2 (one mole of EDTA per two moles of metal ion)
None of the above
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