Chemistry lvl1 question
Peters year 11 class is given the task of devising a method to find out when an acid has been neutralised by a base. Their experiment involves adding sodium hydroxide solution
1)How many nanometres are in 1 angstrom?
2)How many picograms are in 10mg? in 38ng?
3) How many microlitres are in 2L? in 50mL?-(1)1 angstrom = 10^-10m or 1/10 x 10^-9m = 1/10 nm
(2) 1 picogram = 10
Normal human blood has a cholesterol concentration of 200mg in 100ml of blood. Convert to
(a)micro grams/mL
(b) g/L
(c) ng/ micro L-(a) 1microgram = 10^-6g
so, 0.2g = (1/10^-6) x 0.2 = 0.2 x 10^6 mic
At STP, 20 grams of oxygen gas is used to burn potassium metal. What is the mass of oxide produced?
Ok so STP is outta the picture because it has no relevence since all I need to do is find mass whic
The central Boron in Orthoboric Acid is electron deficient ie B(OH)3
Now once its added to water Boron accepts an electron pair from water as a lewis acid and water behaves as the corresponding lewis
Answer in terms of chemistry.10 points for quick and relevant answer-First, we all know the important of purity while performing experiments. As chemist, these are some factors to consider so that we
the H+ and OH- bind in a 1:1 ratio.
therefore, the moles of H+ used will be the moles of OH- neutralized
0.025L x 0.1M = 0.0025moles H+
0.04L x M = 0.0025moles OH-
M NaOH = 0.062M
A molecule or compound is made when two or more atoms form a chemical bond, linking them together. The two types of bonds are ionic bonds and covalent bonds. In an ionic bond, the atoms are bound toge
39.6 g of Zn reacts with 96.9 g of Br to produce
ZnBr2, the only product, with no reactant left
over. How much Zn would be needed to react
with 121 g Br to produce ZnBr2?
1. 171 g
2. 0.0201 g
3. 0.00
I know that classification of 2-methyl-2propanol is tertiary but i need help with...ethanol...2-propanol...phenol...1…-Classification is based upon the number of carbon chains linked to the carbon ato
Here is the equation:
Ca(OH)2 + CO2 --------> CaCO3 + H2O
2.How many grams of CaCO3 would be formed if 4.75g of Ca(OH)2 were allowed to react with 3.25g of CO2?
10 points will be rewarded!!-You are
ZnSO4
NH4Br
Cu(HCO3)2
Please help...I have done the rest but I am stuck with these!Thank you in advance!-zinc sulfate
ammonium bromide
copper(II) bicarbonate -- you can also say cupric bicarbona
(Part 1 of 2)
The solid fuel in the booster stage of the space shuttle is a mixture of ammonium perchlorate
and aluminum powder. On ignition, the reaction that takes place is
6NH4ClO4(s) + 10Al(s) --
The only information I was given was Standard iron contains 0.2500g/L of pure iron. Pipet 25.00mL of this standard solution into a 500mL volumetric flask and dilute up to mark with distilled water.
P
The question is:
14.8g of butan-1-ol were refluxed with NaBr and sulphuric acid, after which 17.8g of 1-bromobutane were collected. Whats the percentage yield of this conversion?
I cant seem to get t
