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
Anton [14]
3 years ago
6

How many atoms are in 3.50 moles of calcium (Ca)?

Chemistry
2 answers:
Charra [1.4K]3 years ago
8 0
1\ mole\ --\ 6.02*10^{23}atoms\\
3.5\ moles--x\\
x=21.07*10^{23}\ atoms
Lelechka [254]3 years ago
6 0
No. of atoms = no.of moles x avagadro's constant

= 3.50 x 6.022*10^23

= 21.077 x 10 ^23
You might be interested in
What does the octet rule state that explains why atoms bond
dezoksy [38]

The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas. The rule is especially applicable to carbon, nitrogen, oxygen, and the halogens, but also to metals such as sodium or magnesium.

The valence electrons can be counted using a Lewis electron dot diagram as shown at the right for carbon dioxide. The electrons shared by the two atoms in a covalent bond are counted twice, once for each atom. In carbon dioxide each oxygen shares four electrons with the central carbon, two (shown in red) from the oxygen itself and two (shown in black) from the carbon. All four of these electrons are counted in both the carbon octet and the oxygen octet.

4 0
3 years ago
Read 2 more answers
Please answer question #4
trasher [3.6K]

Answer:

F=500×3 = 1500 N

W = 1500×10 =15000 Nm

7 0
2 years ago
Read 2 more answers
Natural gas is a mixture of many substances, primarily CH₄, C₂H₆, C3H8, and C4₄H₁₀. assuming that the total pressure of the gase
olchik [2.2K]

Answer:

A. The partial pressure for CH4 = 0.0925atm

B. The partial pressure for C2H6 = 0.925atm

C. The partial pressure for C3H8 = 0.346atm

D. The partial pressure for C4H10 = 0.115atm

Explanation:

Total pressure = 1.48atm

Total mole = 0.4+4+1.5+0.5=6.4

A. Mole fraction of CH4 = 0.4/6.4 = 0.0625

The partial pressure for CH4 = 0.0625 x 1.48 = 0.0925atm

B. Mole fraction of C2H6 = 4/6.4 = 0.625

The partial pressure for C2H6 = 0.625 x 1.48 = 0.925atm

C. Mole fraction of C3H8 = 1.5/6.4 = 0.234

The partial pressure for C3H8 = 0.234 x 1.48 = 0.346atm

D. Mole fraction of C4H10 = 0.5/6.4 = 0.078

The partial pressure for C4H10 = 0.078 x 1.48 = 0.115atm

7 0
3 years ago
Heterotrophic bacteria obtain food by
BARSIC [14]
Heterotrophic cells must ingest biomass to obtain their energy and nutrition. Heterotrophic microorganisms mostly feed upon dead plants and animals, and are known as decomposers. ... Some animals also specialize on feeding on dead organic matter, and are known as scavengers or detritivores. Hope this was helpful.
5 0
3 years ago
True or false?<br><br> Kinetic energy depends only on an object’s speed and velocity.<br><br> Help!
AlekseyPX
False, kinetic energy depends on an objects mass and speed
8 0
3 years ago
Read 2 more answers
Other questions:
  • The change in an object's volume that occurs when heat is added is called
    5·2 answers
  • Which of the following collisions will lead to the reaction shown above
    13·1 answer
  • What's the correct formula for surfer hexaflouride
    10·1 answer
  • What causes continental drift?
    15·2 answers
  • In terms of atomic structure, explain why the first ionization energy K is less than that of Ca ?
    6·1 answer
  • Cell membranes are selectively permeable. This means that A. only water can move freely across the cell membrane. B. any substan
    11·1 answer
  • PLEASE HELP ME ANSWER
    12·1 answer
  • How many units are in 1.54 moles?
    8·1 answer
  • you have a sample of.neon gas that you want to use to.make a glowing sign. you investigate that the gas sample is at 45c and has
    12·1 answer
  • Given the unbalanced equation:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!