1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nadya [2.5K]
3 years ago
7

the density of gold is 19.3 g/cm^3. You inherit a gold bar that measures 7.0 in by 3.0 in by 2.0 in. How many ounces does the ba

r weigh? Express answer in scientific notation.
Chemistry
1 answer:
podryga [215]3 years ago
8 0
<span>You can work out the following: Mass = Density x Volume Density = Mass Ă· Volume Volume = Mass Ă· Density The density of gold is 0.670205 oz/cm^3 The volume is length x width x depth = 7*3*2 = 42 The answer is Mass = 0.670205 x 42 = 281 ounces</span>
You might be interested in
If 26.2 grams of a pure compound contain 8.77 × 1022 molecules, what is the molecular weight of this compound? Answer in units o
Nataly [62]

Answer:

Mw = 179.845 g/mol

Explanation:

  • Mw [=] g/mol

∴ w = 26.2 g

∴ 1 mol = 6.02 E23 molecules.......Avogadro's number

⇒N° moles = 8.77 E22 molecules * ( mol / 6.02 E23 molecules ) = 0.146 mol

⇒ Mw = 26.2 g / 0.146 mol = 179.845 g/mol

3 0
3 years ago
What's the purpose of mitosis and meiosis?
krok68 [10]
The purport of mitosis is cell regeneration, magnification, and asexual reproduction,while the purport of meiosis is the engenderment of gametes for sexual reproduction. Mitosis is a single nuclear division that results in two nuclei that are conventionally partitioned into two incipient daughter cells.
4 0
3 years ago
Which of these is the best evidence that a chemical reactions occurs when coal burns?
laila [671]

Answer:

It’s b even check quizzes

Explanation:

3 0
3 years ago
Read 2 more answers
An energy profile for the reaction A⇌B (left), and the change in concentration of B as a function of time (right), with and with
RoseWind [281]

Answer:

<em>What quantity dictates the speed of a reaction?</em> The activation energy

Explanation:

According to the collision theory, when molecules collide, they must overcome an energy barrier for the reaction to take place. This energy, known as activation energy, is represented by the difference in energy between the initial state and the transition state. The higher the activation energy, the slower the reaction. That's why catalysts reduce the activation energy to accelerate the reaction.

3 0
3 years ago
If you put an egg on a sidewalk on a hot day in July and try to cook it, you are using
Naddik [55]
Thermal energy from the sun that has transferred to the sidewalk
6 0
2 years ago
Other questions:
  • Which reactions are redox reactions? check all that apply. check all that apply. 4li(s)+o2(g)→2li2o(s) mg(s)+fe2+(aq)→mg2+(aq)+f
    13·1 answer
  • Which type of bond results when one or more valence electrons are transferred from one atom to another?
    6·1 answer
  • What thorium has 90 protons and 137 neutrons?
    7·2 answers
  • What property of a wave is measuered by f
    8·1 answer
  • A sample of a compound used to polish dentures and as a nutrient and dietary supplement is analyzed and found to contain 9.0231
    11·1 answer
  • HELP I HAVE 14 MINUTES!!
    14·2 answers
  • On Crosbia, the element unobtanium (Uo) has three isotopic forms: Uo-220, U0-221, and Uo-
    10·1 answer
  • HELP ME PLEASE- 8th grade science
    14·2 answers
  • Calculate how many moles are in 63.1 grams FeCl3.
    12·1 answer
  • Please help answer this question
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!