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Write a balanced chemical equation for the complete combustion of pentane.

First it is important to know the molecular formula for pentane and the products of the combustion reaction so that we can write the unbalanced equation. From the prefix 'pent' we know that the hydrocarbon c...
SB
Answered by Sara B. • Chemistry tutor
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What is the difference between the Prétérito Perfeito Simples (PPS) and the Imperfeito do Indicativo?

To begin, the first rule to memorize is that both the PPS and the Imperfeito do Indicativo are used in order to narrate an action that happened in the past, that has already happened . However, this similari...
GR
12329 Views

Solve the simultaneous equations: 3x + 2y =4 4x + 5y =17

You are trying to find out the value of 'x' and the value of 'y'. This means that you need to be able to take away one equation from the other. 3x + 2y = 4 - we are going to times this equation by 4 = 12x + ...
EW
Answered by Ellie W. • Maths tutor
11210 Views

A stone, of mass m, falls vertically downwards under gravity through still water. At time t, the stone has speed v and it experiences a resistance force of magnitude lmv, where l is a constant.

A stone, of mass m, falls vertically downwards under gravity through still water. At time t, the stone has speed v and it experiences a resistance force of magnitude lmv, where l is a constant. QUESTION: a. ...
RH
Answered by Ronan H. • Maths tutor
5564 Views

How do you solve the following simultaneous equations? 5x+6y=3 2x-3y=12

5x+6y=3 2x-3y=12 6y=3-5x 2x=12+3y 3y=2x-12 Therefore, 6y=2(2x-12)=4x-24 4x-24=3-5x 9x=27 x=3
SI
Answered by Sathana I. • Maths tutor
5207 Views