Butane because more bonds are formed on the combustion of butane hence more heat released.
johnmulu answered the question on February 15, 2017 at 07:09
- When pure water is heated at 1 atmospheric pressure at sea level, the temperature of the water does not rise beyond 100oC(Solved)
When pure water is heated at 1 atmospheric pressure at sea level, the temperature of the water does not rise beyond 100oC, even with continued heating. Explain this observation
Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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A compound whose general formula is M(OH)3 reacts as shown by the equation below.
M(OH)3(s) + OH$^-_4$(aq) $\rightarrow$ M(OH)$^-_4$(aq)
M(OH)3(s) + 3H+(aq) $\rightarrow$ M3+(aq) + 3H2O(l)
a) What name is given to compounds which behave like M(OH)3 in the two reactions
b) Name two elements whose hydroxides behave like that of M.
Date posted: February 15, 2017. Answers (1)
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When magnesium burns in air, it forms a white solid and a grey-green solid. When a few drops of water are added to the mixture, a gas that turns red litmus paper blue is evolved.
Identify the:
i) White solid
ii) Gas evolved and the gas
I) Name of gas
II) Use of the gas.
Date posted: February 15, 2017. Answers (1)
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Naturally occurring magnesium consists of three isotopes. 78.6%24Mg; 10%25Mg and 26Mg. Calculate to one decimal place, the relative atomic mass of magnesium.
Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Soap dissolves in water dissolves in water according to the equation below; NaSt(aq) $\rightarrow$ Na+(aq) + St- where St- is the stearate ion.
a) Write the formula of the scum formed when soap is used in hard water.
b) Write the ionic equation for the reaction that occurs when sodium carbonate is used to remove hardness in water
Date posted: February 13, 2017. Answers (1)
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Date posted: February 13, 2017. Answers (1)
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For each of the following reactions, state the observation and write the formula of the compound responsible for the observation:
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Date posted: February 13, 2017. Answers (1)
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a) Write an equation to show how boiling removes hardness of water.
b) Name two chemicals that are used to remove hardness of water.
Date posted: February 13, 2017. Answers (1)
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The elements nitrogen, phosphorous and potassium are essential for plant growth.
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Describe how a sample of a fertilizer may be tested to find out if it contained nitrate ions.
Date posted: February 13, 2017. Answers (1)
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Date posted: February 13, 2017. Answers (1)
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Date posted: February 13, 2017. Answers (1)
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a) Starting from solid magnesium oxide, describe how a solid sample of magnesium hydroxide can be prepared.
b) Give one use of magnesium hydroxide.
Date posted: February 13, 2017. Answers (1)