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
yan [13]
3 years ago
10

What is the approximate mass of one mole of zinc?

Chemistry
1 answer:
VikaD [51]3 years ago
6 0
The answer is (a) 30g. Zinc = 30. 1 mole = 30 x 1 = 30g
You might be interested in
Which elements are out of order in terms of atomic mass. co,Ni or Li,be or I,xe​
valkas [14]

Answer:

The pair co,Ni is out of order in terms of atomic mass

Explanation:

For co,Ni

Atomic mass of Co = 58.9331 u

Atomic mass of Ni = 58.6934

For Li,be

Atomic mass of Li = 6.941 u

Atomic mass of  be = 9.012182 u

For I,xe

Atomic mass of I =  126.90447 u

Atomic mass of Xe = 131.293 u

Hence, the pair co,Ni is out of order in terms of atomic mass

7 0
2 years ago
Comparing the characteristics of homogeneous and heterogeneous<br>​
Sergeu [11.5K]

answer: A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases.

4 0
3 years ago
Which substance would evaporate the fastest at room temperature? (Assume each substance has approximately the same molecular
lutik1710 [3]

Answer:

A non-polar liquid.

Explanation:

Whether a substance dissolves quickly or not depends on how strongly the molecules (or atoms of an element) of a substance are attracted to one another. These interactions between atoms and/or molecules are called intermolecular forces, or IMFs for short. There are several different ones, and these are distinguished from <em>intra</em>molecular forces which are the bonds holding atoms in the molecule together. Attached is a nice little summary of these forces to consider. Our decision lies within the fact that we must pick the substance that experiences the strongest IMF (the one with the most energy). As it turns out, a dipole in a molecule confers some charge distribution on the molecule which makes slightly positive and negative ends. These can attract each other, and it's called dipole-dipole interactions. It can technically happen in a mixture, but let's assume we're dealing with pure substances. Dipoles can only form in polar compounds however, so a non-polar liquid (which is composed of non-polar molecules), will lack these dipoles and therefore cannot form dipole-dipole interactions between the molecules. This results in only having something called dispersion forces (which really every molecule attraction has - so this is the only one). It is very weak, and since the attraction between these molecules is weak, they will tend to come apart, and evaporate. You can think of the IMFs like glue, and a weak glue will not hold the molecules together well, and they will evaporate away.

On the other hand, polar (from dipole interactions) compounds can have general dipole-dipole interactions or hydrogen-bonding interactions (which is a special type of dipole-dipole interaction). H-bonding requires a Hydrogen bonded to either a Nitrogen, Oxygen, or Fluorine to do this. The main thing, is the non-polar ones don't have a dipole, and so they can't form a good intermolecular bond and evaporate quickly.

Water can H-bond, which is why it takes so long to dry and for it to evaporate in general. Nail polish, which is really a solution of acetone, has considerably weaker dipole-dipole bonds (compared to H-bonds), and evaporates quicker than water. Hope this helps!

Note: Figure taken from Chemistry: The Molecular Nature of Matter and Change 8th edition.

3 0
2 years ago
Earth's layers can be distinguished by density and what other property?
krok68 [10]
The layers are different by composition also, 
 heavier gasses are lower.
4 0
3 years ago
Read 2 more answers
For a hydrogen-like atom, classify these electron transitions by whether they result in the absorption or emission of light.
Nataly_w [17]

Explanation:

When an electron absorbs the light it jumps from its lower energy state  towards the higher energy state. This known as absorption.

When an electron come backs from higher energy to lower energy level energy is released emitted out in the form of light. This is known as emission.

1) n = 3 to n = 5 ,This transition will be absorption.

2) n = 1 to n = 3 ,This transition will be absorption

3) n = 3 to n = 2 ,This transition will be emission.

4) n = 2 to n = 1 ,This transition will be emission.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Separates substances based on their movement through a special paper
    10·1 answer
  • Charcoal (burned wood) that was used to make prehistoric drawings on cave walls in france was scraped off and analyzed. the resu
    12·1 answer
  • A vapor composed of 0.60 mole fraction ethanol and 0.40 mole fraction acetic acid at 120.0 mmHg (absolute), is in equilibrium wi
    11·1 answer
  • A 43.63 gram sample of a hydrate of caseo4 was heated thoroughly in a porcelain crucible, until its weight remained constant. af
    14·1 answer
  • How does the rider’s ability to stop the bike change as the bike moves down a steep hill
    12·1 answer
  • Jerome and a classmate are conducting an experiment. Which piece of safety equipment is least likely to be at Jerome’s lab stati
    10·2 answers
  • Compare and contrast chemical potential energy and elastic potential energy
    12·1 answer
  • What happens when a piece of Mg ribbon is burnt? Name the
    10·1 answer
  • Calculate the percent ionization of benzoic acid at the following concentrations. (a) 0.32 M WebAssign will check your answer fo
    7·1 answer
  • Helppppppp. much needed help lol
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!