-
We need your support!
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
Search results
-
Chemistry: Post your doubts here!
Which of these samples of gas contains the same number of atoms as 1g of hydrogen (Mr : H2, 2)? A 22g of carbon dioxide (Mr : CO2, 44) B 8 g of methane (Mr : CH4, 16) C 20 g of neon (Mr : Ne, 20) D 8g of ozone (Mr : O3, 48) -
Chemistry: Post your doubts here!
How many structural and cis-trans isomers are there for dichloropropene, C3H4Cl2? A 3 B 5 C 6 D 7 is there any other way other than drawing all of them? -
Chemistry: Post your doubts here!
Which of the following solids has a simple molecular lattice? A magnesium oxide B sodium C silicon(IV) oxide D sulphur why D? why not B? -
Chemistry: Post your doubts here!
What is the number of molecules in 500 cm3 of oxygen under room conditions? A 1.25 x 10^22 B 1.34 x 10^22 C 3.0 x 10^22 D 3.0 x 10^26 how do u get A? -
Chemistry: Post your doubts here!
Chlorofluoroalkanes, commonly known as CFCs, undergo homolytic fission by ultraviolet irradiation in the stratosphere. Which radical could result from this irradiation of CHFClCF2Cl? A) CHFClC·FCl B) C·HClCF2Cl C) C·HFCF2Cl D) C·FClCF2Cl how do u get this ? -
Chemistry: Post your doubts here!
the formula XCL2 shows i mole of X's mass will cover 2 of Cl ....so see the RMM of any of the options whose mass is close to 2*Cl Cl-35.5X2=71 Ba-137...so nt possible Ca-40....agn nt possible Mg-24....does not = to 71 Sr-88....closest to 71...so D u can also do the mole ratio: Mass/RMM -
Chemistry: Post your doubts here!
Use of the Data Booklet is relevant to this question. What could be the proton number of an element that has three unpaired electrons in each of its atoms? A 5 B 13 C 15 D 21 why C.... why not B -
Chemistry: Post your doubts here!
A monomer undergoes addition polymerisation. A 1 mol sample of the monomer is completely polymerised. How many moles of polymer might, theoretically, be formed? 1.1 2 .10–6 3.6.02 1023(avogadro's constant) -
-
Chemistry: Post your doubts here!
i just googled it...thxx for the info:) -
-
Chemistry: Post your doubts here!
thxx ... tht was good was explanation.......:) -
Chemistry: Post your doubts here!
yup me too .... thought Mg but it is B- beryllium -
-
-
Chemistry: Post your doubts here!
ohh right...dint think abt tht... WoW thxx ...:) -
Chemistry: Post your doubts here!
2 When a sample of a gas is compressed at constant temperature from 1500 kPa to 6000 kPa, its volume changes from 76.0cm3 to 20.5cm3 Which statements are possible explanations for this behaviour? 1 The gas behaves non-ideally. 2 The gas partially liquefies. 3 Gas is adsorbed on to the... -
Chemistry: Post your doubts here!
how do u do Q 29 and 30?/:confused: -
Chemistry: Post your doubts here!
is Alkenes and Arenes ... nucleophillic or electrophillic? -
Chemistry: Post your doubts here!
How many isomers with the formula C5H10 have structures that involve π bonding? A 3 B 4 C 5 D 6 this too is confusing!!:confused: