introduction to chemistry 5th edition by rich baue
introduction to chemistry 5th edition
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Introduction to Chemistry 5th Edition By Rich Bauer 9781259911149 Chapter 1- 17 Complete Guide .
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Test Bank For Introduction to Chemistry 5th Edition By Rich
Bauer 9781259911149 Chapter 1- 17 Complete Guide .
what is the relative mass of an electron - ANSWER: 1/1836
what is the use of neutrons - ANSWER: hold nucleus together despite electrostatic repulsion between
charged protons
What is an isotope? - ANSWER: Same number of protons, different number of neutrons
same element
different mass number
how do different isotopes react - ANSWER: they don't as electrons are same
what is an example of an isotope - ANSWER: 1h 2h
what is an ion
positive and negative - ANSWER: positive is cation
negative is anion
how do chemists calculate mass of atoms if some mass is lost to hold the nucleus together - ANSWER:
standard isotope needed to base all atomic masses on c-12
mass of c-12 is 12 atomic units
standard mass for atomic mass is 1u so the mass of 1/12tj mass of c-12
1uis mass of proton or neutron
what is relative isotopic mass - ANSWER: mass of an isotope relative to 12th of the mass of an atom of
c-12
what is relative atomic mass - ANSWER: weighted mean mass of an atoms of an element relative to
1/12th mass of an. atom of c-12
what does weighted mean take account of - ANSWER: percentage abundance of each isotope
real-time isotopic mass
how do u find percentage abundance of isotope - ANSWER: ms
what is the basic principles of ms - ANSWER: 1. vapourise
2. fire electrons to form 1+ ions
3. accelerate througuh magnetic field
4. bend and move at different speeds
5. detected on M/Z ration
what is the m/z - ANSWER: relative mass of ion / relative charge of ion
what does m/z show form a 1+ ion - ANSWER: relative isotopic mass
where does m/z go on mass spec graph and what is on other axis - ANSWER: m/z on X axis
other axis is percentage abundance
what is the ionic charge of zn and ag - ANSWER: zn2+
, ag+
what is a binary compound - ANSWER: two elements only
what is a polyatomic ion - ANSWER: ion with atoms of more than 1 element bonded together e..g oh-
what is the charge of carbonate - ANSWER: 2-
what is the charge of nitrate - ANSWER: -1
what is the charge of sulfate - ANSWER: 2-
what is a diatomic molecules - ANSWER: two atoms bonded together e.g.cl2
what quantity is used to measure the number of particles in a substance ( unit molr) - ANSWER:
amount of substance
one mole = - ANSWER: amount of substance that contains 6.022 x 10^23 particles
What is Avogadro's number? - ANSWER: 6.02 x 10^23 the number of particles in each mole of c-12
how many atoms does 12g of carbon 12 contain - ANSWER: 6.02x10^23
what is the mass of one mole of an element - ANSWER: it's ram in g
what is molecular formula - ANSWER: number of atoms of each element in a molecule
what is empirical formula - ANSWER: simplest whole number ratio of atoms of each element in each
compound
what structures are giant crystalline - ANSWER: all ionic compound
what is relative molecular mass - ANSWER: mass of a molecule compared with the mass of an atom of
carbon 12(simple molecular)
what is relative formula mass - ANSWER: mass of a formula unit compared with the mass of carbon
12( not simple molecular)
analysis definition - ANSWER: investigating the chemical composition of a substance
what is hydrated salt - ANSWER: water molecules apart of crystalline structure
what is water of crystallisation - ANSWER: the water molecules which are apart of a hydrated salts
crystalline structure
what is anhydros - ANSWER: no water
what is an example of water of crystallisation to anyhydrous - ANSWER: blue crystal hydrates copper
sulfate heater to form white copper sulfate
what is the procedure for calc the formula of a hydrated salt - ANSWER: weigh empty crucible
add hydrated salt e.g. coppersulfate - weigh both
use pipe clay triange to support crucible on a tripod
hest crucible gently =1 min , strong = 3 min
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