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
BaLLatris [955]
3 years ago
12

How many moles of calcium ion 40.0 g of calcium

Chemistry
1 answer:
VladimirAG [237]3 years ago
8 0
Look on this website! 
http://lawr.ucdavis.edu/classes/ssc100/CEC_Answers02.htm

You might be interested in
Plz help me fast!!!!!!!!!!!
Arisa [49]
A) scientific theory

4 0
3 years ago
Water molecules are listed from A to B to C in
Sunny_sXe [5.5K]
The answer is b, least to greatest motion.

The higher the temperature a substance is, their particles have more kinetic energy and thus move faster and have a faster motion.

From the pictures, we can see that the state changes from the coldest, ice, to the least cold, water, and to the hottest, steam. Therefore, the hotter the substance it, the water molecules have a greater motion.

So your answer is b.
7 0
3 years ago
Read 2 more answers
Which phrase best describes a scientists?
larisa86 [58]

Answer:

They are helpers of the world  who find out about the natural world and try to explain what they have observed.

Explanation:

8 0
3 years ago
Select the molecule where free rotation around one or more bonds is not possible. Group of answer choices N2H4 C2Cl4 NH3 C2H6 CC
Alexandra [31]

Answer:

C₂Cl₄

Explanation:

To know if free rotation around a bond in a compound is possible, we need to see the structure of the compound (picture in attachment).

In single bonds, which are formed by σ bonds, the atoms are not fixed in a single position, and free rotation is permitted.

Double and triple bonds are formed by a σ bond and one or two π bonds, respectively. These bonds do not allow rotation, since it is not possible to twist the ends without breaking the π bond.

The chloroethylene (C₂Cl₄) has two carbons with an sp2-sp2 hybridization, they are bonded together by a double bond. <u>Free rotation on this bond is not possible, because six atoms, including the carbon atoms, doubly bonded and the four chlorine atoms bonded to them, must be on the same plane. </u>

4 0
3 years ago
Calcium has an atomic number of 20. How many electrons of a calcium atom are involved in chemical bonding?
NARA [144]

The answer is 2 electrons.


The electron configuration of calcium is 2:8:8:2

Calcium has two electrons in its outermost shell. These are its valence electrons and are the ones used in bonding with other elements.  Valence electrons of an atom are those electrons that are in its outer energy shell or that are available for bonding.

Calcium is a metal. When metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms forming ions. The resulting compound is known  as an ionic compound.

For example, when calcium metal reacts with chlorine gas,   calcium gives up its two valence electrons and Chlorine accepts them resulting in a new substance called calcium chloride in which the two elements have ended up forming ionic bonds.

3 0
3 years ago
Other questions:
  • What is the answer??
    8·2 answers
  • Which of the following describes a difference between galaxies and solar systems? A. Galaxies contain only moons, while solar sy
    13·2 answers
  • Is c2h2 polar or non polar?
    9·2 answers
  • What statement is true about isotopes?
    11·1 answer
  • A car can accelerate from a standstill to 100 km/h [E] in 9.60s. calculate the average acceleration
    8·1 answer
  • Miguel loves to go hiking. He is taking a hike in the Smoky Mountain National Park in Tennessee. It is a warm summer day. Howeve
    14·1 answer
  • WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!!
    10·1 answer
  • Based on the electron configuration of the two
    10·1 answer
  • A sample of ammonia has a mass of 45.5g. how many molecules are in this sample​
    6·1 answer
  • Ecologists use food web diagrams, like the one shown, as tools in their studies of different populations of organisms within an
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!