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How do I work out the formula of ionic and covalent compounds?

First, ionic compounds form bonds by transferring electrons from their outer shell. Covalent compounds form bonds by sharing electrons within their outer shell. The number of electrons in the outer shell ...

Answered by Mercedes B. Chemistry tutor
2230 Views

Please could you explain the Ontological argument with Kant's counterargument?

Anselm's Ontological argument is a bit different to the other main arguments for God's existence (as well as a bit more complicated), being A Priori, rather than A Posteriori. Here, Anselm tries to prove ...

Answered by Jonathan W. Religious Studies tutor
2712 Views

Solve the equation 6x^2 + 17x - 39 = 0

Using the quadratic equation with a = 6, b = 17 and c = -39, x is found to be 1.5 or -4.33

Answered by Sian E. Maths tutor
3524 Views

Given that y = 5x^4 + 3x^3 + 2x + 5, find dy/dx

We’re being asked to differentiate the function with respect to x. To do so, we use the general formula for differentiation, which is:‘If y = kxn, dy/dx = nkx(n-1)We must also note that, ...

Answered by Harry P. Maths tutor
2911 Views

When do you use "être" and when "avoir" to form the past perfect in French?

The general rule is that "être" is used as the auxiliary verb in the past tense for verbs of movement and which are intransitive, i.e. cannot be followed by an object without a prepositi...

Answered by Michael A. French tutor
1353 Views

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