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A zinc chloride solution (ZnCl2) is prepared by reacting zinc carbonate with dilute hydrochloric acid, write the balanced equation for this reaction

ZnCO3 + 2HCl --> ZnCl2 + H2O + CO2
Student must be aware of the formula for a carbonate (CO3) and how to balance the equation. I leave the balancing to the end to make sure I have written the equa...

SD
Answered by Sam D. • Chemistry tutor
7696 Views

2435 units of gas used in November, costing 4.12p per unit. The gas company also charge 9.43p per day. The total cost has an additional 5% in VAT. What is the gas bill for the month of November?

30 days in November; (30 X 9.43) = 282.9p (2435 X 4.12) = 10032.2p (10032.2 + 282.9) = 10315.1p 5% in VAT so total price is 105% of 10032.2p Convert 105% to decimal; 1.05 (1.05 X 10315...

AG
Answered by Andrew G. • Maths tutor
3358 Views

How does Pliny in his use of language effectively convey a sense of disapproval for the races (15 marks)

Pliny's use of elaborate and rhetorical language is used extremely effectively to critique the races in this passage and potentially to suggest that it is impossible for an intelligent man like himself to...

WS
Answered by William S. • Latin tutor
2579 Views

How do I know when a singular noun is masculine or feminine?

Easy! If the noun ends with -a- it's feminine, if it ends with -o- it's masculine.Feminine nouns: Casa, Scuola, MammaMasculine nouns: Uomo, Gatto, FuocoWhat about those names that end with -e- then? It

MP
Answered by Matteo P. • Italian tutor
2893 Views

Solve the simultaneous equations: [4x-y=3] and [6x +2y=1]

(1) 4x-y=3(2) 6x+2y=1Eliminate y; (1) X 2 => (3) 8x-2y=6 Add (2) to (3) 8x - 2y = 6 +(6x + 2y) = 114x = 7x=1/2 If x=1/2 then,2-y=3 y= -1

AG
Answered by Andrew G. • Maths tutor
4005 Views

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