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How do you calculate the relative formula mass of a compound?

The relative formula mass of a compound is simple to calculate once you know how. It is very similar to the atomic mass of an element, except instead of only being the mass of that one element, it is the mas...
VK
23843 Views

How to find wave speed from frequency and wave length.

Wave Speed = Frequency * Wavelength (Note: Make sure you convert the unit of frequency to ‘Hz’ and the unit of wavelength to ‘m’) Yes you can simply use this equation, but understanding the principle will ma...
VK
Answered by Varadhan K. • Physics tutor
9536 Views

What is the fundamental Problem of Evil?

The fundamental heart of the Problem of Evil is the apparent inconsistency between how we see God and the existence of evil and suffering in the world. God is seen as omni-benevolent , all-loving, and as omn...
TH
4041 Views

Imperfect or Preterite?

One of the things people find the hardest when learning languages is not forming the tenses but when to use the preterite or imperfect when talking about events which happened in the past. The most important...
LJ
Answered by Lois J. • Spanish tutor
5010 Views

Using être as an auxiliary in the perfect tense

If you have already dabbled in the use of the perfect tense, you might be wondering, “When do I know which of the two auxiliaries to use?” The answer all depends on the verb you use.Most verbs in the perfect...
TD
Answered by Tutor8432 D. • French tutor
6477 Views