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
1. If 3.2 L of nitrogen monoxide and 4.3 g of oxygen gas are combined, what volume of nitrogen dioxide will be formed? 2NO + 0,
Free_Kalibri [48]

Answer:

3.2 \div 22.4 =  \frac{1}{7} mol \: no

4.3 \div 32 = 0.134mol \: o2

Explanation:

NO is limit reactant so:

1÷7×46=6.57 grams of NO2 will form

3 0
3 years ago
Outline how fresh water could be extracted from salt water if fresh water was no longer available.
leva [86]

You can boil the salt water. The water will evaporate while the salt will be left behind because it's a solid. Salt has a much higher boiling point than water (2,575° F), so that's why it won't evaporate with the water.

8 0
3 years ago
Suppose that a sample of gas occupies 187 mL
drek231 [11]

Answer:

V2 = 90.7 mL

Explanation:

pressure and volume are inversely proportional, if the pressure is increased, the volume will decrease. In an isothermal process:

p1V1 = p2V2

V2 = p1V1/p2 = (277 torr×187 mL)/571 torr

V2 = 90.7 mL

7 0
3 years ago
Describe how the particles of two substances interact when mixed. Be sure to discuss the activation energy and how the particles
Charra [1.4K]
A reaction mechanism must ultimately be understood as a "blow-by-blow" description of the molecular-level events whose sequence leads from reactants to products. These elementary steps (also called elementary reactions) are almost always very simple ones involving one, two, or [rarely] three chemical species which are classified

It is common knowledge that chemical reactions occur more rapidly at higher temperatures. Everyone knows that milk turns sour much more rapidly if stored at room temperature rather than in a refrigerator, butter goes rancid more quickly in the summer than in the winter, and eggs hard-boil more quickly at sea level than in the mountains. For the same reason, cold-blooded animals such as reptiles and insects tend to be noticeably more lethargic on cold days.

Thermal energy relates direction to motion at the molecular level. As the temperature rises, molecules move faster and collide more vigorously, greatly increasing the likelihood of bond cleavages and rearrangements as described above.
8 0
3 years ago
Which statement best describes alpha decay?(1 point)
Veseljchak [2.6K]

Answer:

After the ejection of an alpha particle, the remaining nucleus has a mass number that is four less and an atomic number that is two less, so alpha decay is a type of nuclear fission.

6 0
2 years ago
Other questions:
  • Identify the compound that does not have hydrogen bonding. identify the compound that does not have hydrogen bonding. ch3oh h2o
    9·2 answers
  • Question 21 (2 points)
    10·2 answers
  • How many moles in 500l of ar gas?
    7·1 answer
  • Which of these is a harmful interaction?
    7·1 answer
  • What is the pOH of a 0.0010 M solution of calcium hydroxide (Ca(OH)2)
    12·1 answer
  • In an oxidation-reduction reaction, the reducing agent In an oxidation-reduction reaction, the reducing agent gains electrons an
    13·1 answer
  • What guidelines were used by Miller and Urey when they constructed their experiment?
    11·1 answer
  • The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and:
    9·2 answers
  • Is anyone good at chemistry if so Can someone help me please NO LINKS
    6·1 answer
  • What is the common uses of bases
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!