# 1.5 Measurement uncertainty, accuracy, and precision  (Page 7/11)

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exact number

number derived by counting or by definition

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Types of electrolytes
list 6 subatomic particles and their mass, speed and charges
combination of acid and base
that salt
Talhatu
calculate the mass in gram of NaOH present in 250cm3 of 0.1mol/dm3 of its solution
The mass is 1.0grams. First you multiply the molecular weight and molarity which is 39.997g/mol x 0.1mol/dm3= 3.9997g/dm3. Then you convert dm3 to cm3. 1dm3 =1000cm3. In this case you would divide 3.9997 by 1000 which would give you 3.9997*10^-3 g/cm3. To get the mass you multiply 3.9997*10^-3 and
Kokana
250cm3 and get the mass as .999925, with significant figures the answer is 1.0 grams
Kokana
nitrogen, phosphorus, arsenic, antimony and Bismuth
What is d electronic configuration of for group 5
Can I know d electronic configuration of for group 5 elements
Miracle
2:5, 2:8:5, 2:8:8:5,...
Maxime
Thanks
Miracle
Pls what are d names of elements found in group 5
Miracle
define define. define
what is enthalpy
total heat contents of the system is called enthalpy, it is state function.
Sajid
background of chemistry
what is the hybridisation of carbon in formic acid?
sp2 hybridization
Johnson
what is the first element
HYDROGEN
Liklai
Element that has positive charge and its non metal Name the element
Liklai
helium
oga
sulphur
oga
hydrogen
Banji
account for the properties of organic compounds
properties of organic compounds
mercy
what's the difference between molecules and compounds
A compound can be a molecule however compounds must contain more than one element. For example ozone, O3 is a molecule but not a compound.
Justin
what is che? nd what is mistry?
Mukhtar
What's elixir?
An Elixir is a substance held capable of changing base metals into Gold.
Nwafor
Give an example for each of the six groups of element