Other Chemistry Answers

what are the implication of laboratory hazard

The larger the difference in electronegativity
1- the more covalent the bond
2-the more ionic the bond
3-the more nonpolar the bond
the choice
1only
2 only
3 only
2and3 only
1and 3only

Consider the following balanced equation: N2 + 3H2 --- 2NH3

When 4.50 mole of H2 react, how many grams of N2 are needed?

How many grams of H2 are required to produce 27.0 g of NH3?

Discuss the Hittorf method of determination of transport number

Substance A has a higher specific heat than substance B. With all other factors equal, which requires the most energy to heat equal masses of A and B to the same temperature?
Substance A
Substance B
Both require the same amount of heat.
Answer depends on the density of each substance.

Expansion joints are used for materials that easily expand and contract depending upon its temperature. How much expansion can take place for a brass pipe 25.8 m long that experiences temperature changes of 75.2°C?
3.44 cm
5.90 cm
3.69 cm
1.23 cm

The amount of heat necessary to change an object's temperature 1 kg 1°C is called
fusion.
temperature.
radiant heat.
specific heat.

Temperature is
a form of heat transfer where energy is radiated in the form of rays.
a form of heat transfer.
a form of energy contained in an object associated with the motion of molecules.
a measure of the hotness or coldness of an object.

No water vapor is added to or removed from a sample of air that is cooling, so the relative humidity of this sample of air will
remain the same.
be lower.
be higher.
the answer depends on the temperature.

Anytime a temperature difference occurs, you can expect
cold to move to where it is warmer.
energy movement from higher temperature regions
no energy movement unless it is warm enough, at least above the freezing temperature
energy movement flowing slowly from cold to warmer regions.