100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
CHEM 101 PRACTICE TEST COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (ALREADY GRADED A+) CA$19.49   Add to cart

Exam (elaborations)

CHEM 101 PRACTICE TEST COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (ALREADY GRADED A+)

 9 views  0 purchase
  • Course
  • CHEM 101
  • Institution
  • CHEM 101

CHEM 101 PRACTICE TEST COMPLETE QUESTIONS AND CORRECT DETAILED ANSWERS (ALREADY GRADED A+) The nucleus of an atom contains: A) Protons and electrons B) Protons and neutrons C) Electrons and neutrons D) Protons, neutrons and electrons E) Electrons only - Answer-B The nucleus of an atom cont...

[Show more]

Preview 2 out of 5  pages

  • September 17, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • CHEM 101
  • CHEM 101
avatar-seller
CHEM 101 PRACTICE TEST COMPLETE
QUESTIONS AND CORRECT DETAILED
ANSWERS (ALREADY GRADED A+)
The nucleus of an atom contains:
A) Protons and electrons
B) Protons and neutrons
C) Electrons and neutrons
D) Protons, neutrons and electrons
E) Electrons only - Answer-B

The nucleus of an atom contains protons and neutrons.

Which subatomic particle is found in the nucleus and has no charge?
A) Electron
B) Neutron
C) Proton
D) Positron - Answer-B

Neutrons are subatomic particles found in the nucleus that have no charge.

How many protons are in an atom of strontium-90?
A) 2
B) 38
C) 87.62
D) 90 - Answer-B

Strontium has an atomic number of 38. The atomic number is the number of protons in
an atom.

What is the mass number for an atom of osmium containing 76 protons and 113
neutrons? - Answer-189

The mass number of an atom is representative of the number of protons and neutrons.
The number of protons can be found from the atomic number of the element on the
periodic table. Calculate the mass number using the given number of protons and
neutrons. For example, if there are 76 protons and 113 neutrons, the mass number can
be calculated like this: 76+113=189

What is the mass number of tin-120? - Answer-120

Isotopes can be written as "element-mass number". For example, "tin-120" indicates an
atom of tin with a mass number of 120.

, What is the atomic number for an element whose mass number is 115, which contains
66 neutrons per atom? - Answer-49

The mass number of an atom is representative of the number of protons and neutrons.
The number of protons can be found from the atomic number of the element on the
periodic table. Calculate the number of protons/atomic number using the given mass
number and neutrons. For example, if an atom has a mass number of 115 and contains
66 neutrons, the number of protons/atomic number can be calculated like this: 115-
66=49

What is the atomic number for an element whose mass number is 152, which contains
89 neutrons per atom? - Answer-63

. .The mass number of an atom is representative of the number of protons and
neutrons. The number of protons can be found from the atomic number of the element
on the periodic table. Calculate the number of protons/atomic number using the given
mass number and neutrons. For example, if an atom has a mass number of 152 and
contains 89 neutrons, the number of protons/atomic number can be calculated like this:

Determine the mass in grams of 3.00 × 10²¹ atoms of arsenic. (The mass of one mole of
arsenic is 74.92 g.) - Answer-0.373g

.The number of moles of a substance can be calculated using Avogadro's number.
Then, the mass can be calculated using the molar mass.

Determine the mass in grams of 3.75 × 10²¹ atoms of zinc. (The mass of one mole of
zinc is 65.39 g.) - Answer-0.407g



A homogeneous mixture is also called a - Answer-solution

(A solution is a type of homogeneous mixture composed of two or more)

The following picture would be best described as

(circles red and blue, close but not packed together or loosely). - Answer-a liquid
mixture

(The picture is best described as a liquid mixture. Liquids do not have a definite shape
but do not fill the entire container, so the particles are found only on the bottom of the
container. Mixtures contain two different types of particles (shown here in different
colors) which are not chemically bound.)

Which one of the following is an example of a compound? - Answer-water

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 Scholarsstudyguide. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$19.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

79373 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
CA$19.49
  • (0)
  Add to cart