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Explain the trend in reactivity of group 1 metals.

Going down the 1st column of the periodic table the group 1 metal have increasing numbers of electrons.All group 1 metals have a single electron in their outer shell and with an increasing number of electron...
TL
Answered by Thomas L. • Chemistry tutor
4847 Views

What is the difference between "por" and "para"?

They are both prepositions that can be translated as "for" in English. As a rule, you can think of "por" as anything that explains the reason or the means/way through which you do somethi...
RS
Answered by Rosa S. • Spanish tutor
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Peter is 180cm tall, correct to 2 significant figures. Alice is 150cm tall, correct to 2 significant figures. What is the upper and lower bound of the difference in their heights?

Upper bound of Peter's height = 185cmLower bound of Peter's height = 175cmUpper bound of Alice's height = 155cmLower bound of Alice's height = 145cmFor the upper bound of the difference, we want the upper bo...
JT
Answered by James T. • Maths tutor
4250 Views

Explain the difference between diffusion and active transport with examples.

Diffusion is the passive process by which molecules move across a semi permeable membrane down their concentration gradient from an area of high concentration to low concentration. An example is gaseous exch...
SM
Answered by Sarah M. • Biology tutor
9530 Views

320 people go on a coach trip. Each trip holds 53 people. Gary says 6 coaches are needed. Is Gary correct?

53 x 6 = 318320-318 = 2There are not enough coaches for the amount of people. 2 people would not be on a coach. 7 coaches are needed to ensure everyone has a seat on a coach.
AE
Answered by Arthur E. • Maths tutor
7790 Views