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Why is chlorine more reactive than iodine?

Chlorine's outer electrons are closer to the nucleus than iodine, so greater attraction from the positive nucleus making it easier to gain an electron.

HK
1788 Views

When rolling two dice, what is the probability of rolling 7?

16.7% or 1/6.The combinations for (dice 1, dice 2) which total 7 are: (6,1), (5,2), (4,3), (3,4), (2,5), (1,6).Total possible cocmbinations = 36.Hence 6/36=1/6=0.166... or 16.7%

KJ
Answered by Krzysztof J. Maths tutor
2356 Views

(x + a)(x + 3)(2x+1) = bx^3 + cx^2 + dx -12, find the values of a, b, c and d.

This question is an example of expanding algeba and equating coefficients. If the brackets on the left-hand side are expanded the unknown values can be found from the coefficients on the right-hand side.S...

JS
Answered by Joe S. Maths tutor
6537 Views

What are three organelles found in a plant cell not found in prokaryotic cells?

Nucleus - In eukaryotes the nucleus contains most of the DNA and also directs chemical processes of the cell. Prokaryotes do not have nuclei.Mitochondria - Most eukaryotic cells have mitochondria which ar...

MD
Answered by Myles D. Biology tutor
2719 Views

5 Footballs and 3 tennis balls cost £2.30, 4 Footballs and 2 tennis balls cost £1.80. What is the total cost of 1 football and 1 tennis ball?

(simple algebraic substitution equations)
assign each an algebraic term to form equations > footballs = f, tennis balls = tequation 1 > 5f + 3t = £2.30equation 2 > 4f + 2t = £1.80
(you ...

TC
Answered by Troy C. Maths tutor
3142 Views

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