Chemistry

Chemistry Radon Question REALLY PLEASEEE HELP ME!!!!!

Uranium and radium are found in many rocky soils throughout the world. Both undergo radioactive decay, and one of the products is radon-222, the heaviest noble gas (t1/2 = 3.82 days). Inhalation of th

Mass relationships grade 11 chemistry

Hello, I cant seem to understand how mass relationships in Stiochiometry works. For this part of my homework, I cant do the simplest question. Please help me with the following questions ( I am gratef

Calculate the pH of the following solutions.

0.060 M in sodium formate, NaCHO2, and 0.350 M in formic acid, HCHO2. The Ka for formic acid is 1.8x10-4 0.0575 M in pyridine, C5H5N, and 0.0720 M in pyridinium chloride, C5H5NHCl The Kb for pyradine

How do i find the % purity of a substance

FeTiO3(s) + H2SO4(aq) -> TiO2(s) + FeSO4(aq) + H2O(l) 6.922g of umpure FeTiO3 TiO2 weighs 3.025g pls show steps (: thankyou-Molecular mass of FeTiO3 = 151.7 Molecular mass of TiO2 = 79.9 You might

How to separate charcoal from a mixture of copper oxide & powdered charcoal

You could ...... Add sulphuric acid, which would react with the CuO to make soluble CuSO4 and then filter of the insoluble charcoal.

Is it possible to separate powdered calcium carbonate from powdered calcium chloride using water & filtering

Calcium chloride is water-soluble, where calcium carbonate is mostly insoluble, so it would be possible.

In chemistry, is mass and volume the same thing

if not, whats the difference?-They are not the same thing but they are related by density Density = mass/volume Mass is the amount of stuff something contains whilst volume is how much space that st

Would a meta-directing substitutent on a ring system make the ring react faster or slower than a para-director

It does not effect much, as meta is not in conjugation of resonating structure. Para position react faster because it is in conjugation. Reactivity depends on the activatng and deactivating group att

Can you pls help me write a ionic equation for this question

The addition of excess sodium hydroxide solution to a suspension of aluminium hydroxide in water. pls show me how you did this, thankyouu (:-This is the formation of a complex ion, and the simplest w

What is i^54 + i^44???

-1 + 1 0-the answer is 0. i^2=-1 i^4=1 so i^{(4*13)+2} + i^(4*11) =i^(4*13) * i^2 + i^(4*11) =1* (-1)+1 =0

What is the molecular formula of this compound

What is the molecular formula of this compound? An organic compound contains 54.55% C and 9.90% H. The molar mass is close to 90. What is the molecular formula? Where I have gotten so far: CxHyOz =

2c-b popular research chemical

2c-b is very popular research chemical, Does anyone know where can I find it? please tell me.. Thx:)-Try legal high „bath salts” White lady 1g, Freebase 1g and C original 1g. Here is you can find

Chemistry help-GCSE-atom economy

About 3000 tonnes of ibuprofen tablets are taken in the UK each year. Calculate the mass of waste created making 3000 tonnes of ibuprofen tablets at an atom economy of 40%. Please could someone tell

How many moles of helium occupy a volume of 5.00 L at 227.0°C and 5.00 atm? (R = 0.0821 atm.L/mol.K)

PV = nRT so n = PV/RT n = (5 x 5)/(0.0821 x 500.15)= 25/41.062315= 0.61 (to two decimal places)

Applications of Intermolecular Forces: Why does ice float (Chemistry)

Why does ice float? My explanatin was: Due to the shape formed by H-bonding between each water molecule, the overall structure of Water becomes a less dense shape than the shapes that form during th