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1) Octane burns in air to form carbon dioxide and H2O. 2C8H18 (l) + 25O2 (g) ----> 16CO2 (g) + 18H2O (l) 2) Zinc oxide reacts with excess carbon. 2ZnO (s) +C (s) ----> 2Zn (s) + CO2 (g) 3) Sodium hydroxide and magnesium. [ This reaction doesn't occur since sodium is more reactive than...

No...silicon isn't a diatomic molecule. If you actually mean sulfur, it can exist in many forms (allotropes) as S2, S6, S8, etc, as molecules.

5. Select the group that contains only molecules. A Water, methane, copper chloride B Hydrogen, sulfur, argon C Ethane, lead, diamond, oxygen D Bromine, fluroine, silicon dioxide, water A is wrong since copper chloride is ionic and hence, does not occur as a molecule. B is correct since all of...

Mass of aluminium oxide = mass of aluminium + mass of oxygen Therefore since it says that the masses of the metals increase by a certain percentage, it has gained more mass as a result of reacting and combining with oxygen. Since this is just a percentage, you now need to multiply it by the...

Aluminium: Mass of aluminium oxide = 189% x 5.00 = 9.45 g Mass of oxygen = 9.45 - 5.00 = 4.45 g

Try using Deconstructing Perspectives by Janne Schill ?

https://cornellchem.wikispaces.com/file/view/pg2_periodic_table_ions.pdf

Metals that form a passivating layer such as zinc and aluminium do not experience complete corrosion since this oxide layer is non-porous. Metals such as iron and sodium would experience complete corrosion since the oxide layer formed is porous and hence the metal is still prone to further corrsion.

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T-method: Basic info: Let tan(X/2) = t. sinX = 2t / 1 + t^2 cosX = 1 - t^2 / 1 + t^2 Example: 3cosX + 4sinX = -1 (0° =< X =< 360°) 1. Simplify where possible (this is an easy question so you won't be able to simplify it much further). 2. Substitute and solve. Sometimes it will be necessary to...

Example: 3cosX + 4sinX = -1 (0° =< X =< 360°) T-method: 1. Find the appropriate trig expansion (e.g. sin(a+b), sin(a-b), cos(a+b), cos(a-b). For this example, sin(a+b) or cos(a-b) would be appropriate. 2. Equate one of the trig expansions with the current equation, whilst ignoring the RHS...

Identify data sources, gather, process and present information from secondary sources to identify areas of current research and use the available evidence to discuss some of the underlying physical principles used in one application of physics related to waves, such as: Global Positioning System...

Re: Where can I get Fitzpatrick book? + 1

lols k, thx bro - btw latex is annoying to use =(

LHS = \frac{sinA}{1+cosA}+\frac{1+cosA}{sinA} = \frac{sin^2A+1+2cosA+cos^2A}{(sinA)(1+cosA)} = \frac{(1-cos^2A)+1+2cosA+cos^2A}{(sinA)(1+cosA)} = \frac{2+2cosA}{(sinA)(1+cosA)} = \frac{2(1+cosA)}{(sinA)(1+cosA)} = \frac{2}{sinA} = 2cosecA = RHS

Maths: Basic Arithmetic and Algebra/Surds, Trigonometry (Identities, Equations, Functions & Graphing, Sine, Cosine, Area, 3D, Sum and Difference, Double and Half angles, t-method, Auxiliary angles), Functions & Relations. does that count as lagging? =S

Hmm...play around with the program and each of the tools/functions as an introduction and read the help menu and any tutorials for it. Personally, i would use VectorWorks since it's really easy to use and learn.

Let the number of people behind her equal x and the people in front of her equal x+3. no. of people in front + sue + no. of people in front = 16 x+1+x+3 = 16 2x = 16-4 2x = 12 x = 6 People in front = x + 3 = 6 + 3 = 9 Therefore, Sue is 10th in...

http://wiki.answers.com/Q/Why_is_concrete_strong_in_compression_and_weak_under_tension I hope this answers it and good luck for your test ! =)

Excel for Year 10 does help, if you buy the 'Advanced' Book though. Use Spectrum Mathematics Year 10 Advanced and Mathscape 10 Extension but these books aren't cheap like Excel. =)