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PCl3 (s) + Cl2 (g) -> PCl5 (s) 1. WHAT VOLUME OF Cl2 would react with 1.4g of PCl3 to make PCl5? 2. IF YOU WANTED to make 10g of PCl5, what volume of Cl2 would you need? 3. WHAT IS THE MAXIMUM MASS of PCl5 that could be made from 360cm3 of cl2? I am very...

2Na(s) + 2HCl (aq) -> 2NaCl (aq) + H2 (g) 1. IF 2.5G OF SODIUM REACTS WITH AN EXCESS OF HYDROCHLORIC ACID, WHAT VOLUME OF HYDROGEN WILL BE PRODUCED? My working: Na H2 mass-2.5 0.109 mr-23 2 moles-0.109 0.543 volume 0.109 X 24000 = 2608.696cm3 Is that righ...

Ytterbium, atomic number 70, is the first element in the Periodic table to have the first four shells full. a) State the number of electrons in the fourth shell/ level of ytterbium (1) b)How many orbitals are there in the third shell of ytterbium? (1) Ple...

Bromine has two isotopes, Br- 79 and Br- 81. The relative atomic mass of bromine is 79.9. CALCULATE THE PERCENTAGE of Br-79 atoms in a sample of bromine. PLease help i'm really stuck

Antimony, Sb, has atomic number 51. a)WHICH PERIOD AND BLOCK IS ANTIMONY FOUND? is it period 6 block 13??? b)DIFFERENT ISOTOPES OF ANTIMONY HAVE THE SAME CHEMICAL PROPERTIES. EXPLAIN WHY (1) Is it their the same thing?? C)A SAMPLE OF ANTIMONY, Ar=121.8, W...

WHAT IS THE ION CONFIGURATION OF GALLIUM 3+ AND TIN 4+ AND WHAT ARE THE RULES (WRITTEN CLEARLY) please help i really dont know

Bromine has two isotopes, Br- 79 and Br- 81. The relative atomic mass of bromine is 79.9. CALCULATE THE PERCENTAGE of Br-79 atoms in a sample of bromine. PLease help i'm really stuck Someone said: The total for 79 and 81 is 100% and the total for fraction...

A SAMPLE OF ANTIMONY, Ar=121.8, WAS ANALYSED AND WAS FOUND TO CONSIST OF 60% OF 121Sb AND ONE OTHER ISOTOPE. DETERMINE THE MASS NUMBER OF THE OTHER ISOTOPE IN THE SAMPLE OF ANTIMONY. please help I'm really stuck,

A ball is hit from horizontal ground with velocity (10i+24.5j) ms-1 where the unit vectors i and j are horizontal and vertically upwards respectively. a)State two assumptions that you should make about the ball in order to make predictions about its motio...

40 Ca2+ 20 79 Br- 35 58 Ni2+ 28 For the three ions written above give the correct number of each of the following: a) the maximum number of electrons in the first shell b)the unpaired electrons in an oxygen atom c)the full orbitals in a chlorine atom d)th...

Element X has three isotopes Isotope 1 Isotope 2 Isotope 3 Mass 28 29 30 Abundance % 92.18 4.71 3.12 ii)Use the isotope abundances and masses to calculate the relative atomic mass of x. Quote your answer to one decimal place. ii) Identify Element X. Show...

A SAMPLE OF ANTIMONY, Ar=121.8, WAS ANALYSED AND WAS FOUND TO CONSIST OF 60% OF 121Sb AND ONE OTHER ISOTOPE. DETERMINE THE MASS NUMBER OF THE OTHER ISOTOPE IN THE SAMPLE OF ANTIMONY. Someone said: assume you have 100 grams. It becomes the overused algebra...

What is the algebra candy mixture problem? PLease explain clearly and detailled.

I dont get all these tf, tr, yo terms you used please expain more clearly i dont understant it

I dont understand: hf=hi+vi'*t-4.9t^2 where hf=hi=0, and vi' is 24.5j solve for time t. ii) range= vih*t where vih=10i Please write in full clear sentences so i can understand the working out

is it 40.1 percent??

I just dont understand this I know that ytterbium has the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 but I dont know anything else apart from that so I dont understand what Bob means by outer or anything about the shell...

Please still answer my question

Please help someone