Exam (elaborations)
Chem Final (Straighterline) [C] Questions and Answers 2024
- Course
- Institution
Chem Final (Straighterline) [C]
[Show more]
Content preview
Chem Final (Straighterline) [C]How is the mass number of an element different from its atomic number? - answer The
mass number represents the total number of neutrons and protons in one atom of the
element as opposed to the total number of protons.
Most nonmetallic elements are found in which block of the periodic table of elements? –
answer p
Ernest Rutherford disproved J.J. Thomson's plum-pudding model of the atom by
showing that - answer positive matter is concentrated in the central core
Plants use up copious amounts of which alkali metal, preventing most of it from being
washed out to sea? - answer potassium
What is the ratio of reactants and products in the chemical equation?
__NaOH + __H2SO4 -> __Na2SO4 + __H2O - answer2:1:1:2
Which of the following isotopes is likely to be the most stable? - answerSn-50 (because
the most stable ones are 2,8,20,50,82 or 126 protons)
The initial volume of a system containing 1 mole of an ideal gas at 292° Kelvin and 3
atm is 8 L. If the gas is cooled at constant volume until the pressure falls to 1.2 atm,
then the gas is heated and expanded at constant pressure (1.2 atm) until the volume is
20 L and the temperature is 292° Kelvin, what is the overall work that has been done by
the system? - answer-1.46 kJ (use the fomula w=-P/\V)
What is Avogadro's number? - answerAVOGRADO's number is defined as the number
of ATOMS in 12g of Carbon-12
Which arrangement accurately describes the standard entropy values for Na at different
phases? - answerNa (s) < Na (l) < Na (g
What is the reducing agent in the following equation?
Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) - answerMg
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now