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The gases X & Y react with each other to produce gas Z according to the equation: 2X + Y ->2Z. 100cm3 of gas X was mixed with 10cm3 of gas Y, in a freely moving sealed gas syringe The reaction went to completion. What was the final volume of the syringe?

What's the key information we need to extract from the question: reaction went to completionmolar ratios of X, Y and ZGas Y is the limiting factor & Gas X is in excess If gas Y is the limiting factor, an...
AT
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On complete combustion in air, a sample of an unknown hydrocarbon yielded 176 grams of CO2 and 108 grams of H2O with no additional products. Which one of the following might be the formula of the hydrocarbon? (Relative atomic masses: H=1, C =12, O =16)

a) CH 2 b) CH 3 c) CH 4 d) C 2 H 4 e) C 2 H 8 The equation for the combustion of the hydrocarbon is: C x H y + (A + 0.5B)O 2 --> A.CO 2 + B.H 2 OMoles = mass/A r Moles of CO 2 = 176/44 = 4 = AMoles of H 2...
ZC
4140 Views

Essay question: why would parents withold vaccines from their children?

To answer this essay question effectively, a candidate would have to demonstrate the basic understanding of the principles and significance of vaccination including the "herd effect." This could be...
JZ
3232 Views

What top tips would you give for the BMAT test?

The BMAT test is very demanding by medical and dental schools that use them as part of their admissions process. Effective preparation is vital to perform well and have a strong chance at getting those compe...
AG
2882 Views

Which of these statements is correct? 1. The kidneys filter the blood and remove waste products from the body. 2. The kidneys are involved in digesting food. 3. In a healthy individual, the Kidneys produce urine that contains high levels of glucose.

Only statement one is true as the kidneys are not involved in digestion, but do filter the blood of waste products. Glucose is found in high concentrations in the urine of diabetics, who cannot absorb glucos...
CD
2739 Views