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Write a balanced chemical symbol equation for a reaction between Potassium and Water, including state symbols?

2K(s) + 2H 2 O(l) = 2KOH(aq) + H 2 (g) Potassium (K) is a group 1 metal, which is a solid. Water (H 2 O) reacts with Potassium to form Potassium Hydroxide (KOH) and Hydrogen (H 2 ). Hydrogen exists naturally...
JD
Answered by Joe D. • Chemistry tutor
163430 Views

Differentiate with respect to x and write in its simpliest form, Y=(2x-3)/x^2?

Y=(2x-3)/x 2 Quotient Rule: dY/dx(u/v)=(u'v-v'u)/v 2 dY/dx=(2x 2 -2x(2x-3))/x 4 =(6x-2x 2 )/x 4 (Collect numerator x terms.) =(6-2x)/x 3 (Cancel the fraction by a factor of x.) dY/dx=(6-2x)/x 3
JD
Answered by Joe D. • Maths tutor
6937 Views

[FP2] Solve: 3 cosh x - 4 sinh x = 7

First write cosh and sinh as exponentials, from their respective definitions:sinh x = 1/2 (e x - e -x )cosh x = 1/2 (e x + e -x ​)So: 3 * 1/2 (e x + e -x ​) - 4 * 1/2 (e x - e -x ) = 7Multiply by 2: 3 * (e x...
WU
Answered by William U. • Maths tutor
21876 Views

What is the difference between "ser" and "estar"?

This is a tricky one. The rhyme I learned "how you feel and where you are - that is when you use estar!" is pretty useful, but I like to remember it based on whether the state of something can chan...
SL
Answered by Sophie L. • Spanish tutor
2302 Views

How do I structure my time for the ELAT exam?

The ELAT is 90 minutes long and because essay writing depends on personal style, it does slightly depend. If you like to have more time to plan, then you could spend up to 15 minutes planning. The breakdown ...
TB
Answered by Teddy B. • ELAT tutor
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