155.4 grams of carbon tetrachloride to atoms
Answers
30.41 × 10²³ atoms
Explanation:
First we calculate the number of moles of carbon tetrachloride (CCl₄):
number of moles = mass / molar weight
number of moles of CCl₄ = 155.4 / 153.8 = 1.01 moles
Now to find the number of atoms in 155.4 grams of carbon tetrachloride we use Avogadro's number:
if in 1 mole of CCl₄ there are 5 × 6.022 × 10²³ atoms
then in 1.01 moles of CCl₄ there are X atoms
X = (1.01 × 5 × 6.022 × 10²³) / 1
X = 30.41 × 10²³ atoms
Learn more about:
Avogadro's number
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Name 3 some sources of CO2
Answers
- protection
-helps the cell bind to other cells
- carries a identity marker that prevents the white bkood cells from destroying the bodies own cells.
Hope this helps!
Answers
Answer : The atomic models that belongs to the same element are atomic model 2 and 3. (Shown below)
Explanation :
As we know that an atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.
The protons and the neutrons are located inside the nucleus or center of the nucleus where the mass of the an atom is concentrated and the electrons are located around the nucleus.
The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.
Atomic number is defined as the number of protons or number of electrons.
Atomic number = number of protons = number of electrons
Same element has same number of protons.
Atomic model 1 : In this model, there are 8 number of electrons, 8 number of protons and 8 number of neutrons.
Atomic model 2 : In this model, there are 5 number of electrons, 5 number of protons and 6 number of neutrons.
Atomic model 3 : In this model, there are 5 number of electrons, 5 number of protons and 5 number of neutrons.
Atomic model 4 : In this model, there are 6 number of electrons, 6 number of protons and 6 number of neutrons.
From this we conclude that, the atomic model 2 and 3 has same number of protons. So, these two models belongs to the same element.
Hence, the atomic models that belongs to the same element are atomic model 2 and 3. (Shown below)
Answer:
the one in the top right corner and the one in the bottom left corner
Explanation:
Answers
Answer:
158.0 mL
Explanation:
We can solve this problem by using Boyle's law, which states that:
"For a fixed mass of a gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume"
Mathematically:
where
p is the pressure of the gas
V is its volume
The equation can be rewritten as
where in this problem:
is the initial pressure
is the initial volume
is the final pressure
Solving for V2, we find the final volume:
mL
Answers
~Hope this helped! :)
• N2 • CCl4 • SiO2
• AlCl3 • CaCl2 • LiBr
Answers
Answer:
N2 Covalent
CCl4 Covalent
SiO2 Covalent
AlCl3 Covalent
CaCl2 Ionic
LiBr Covalent
Explanation:
With covalent bonds, there is a sharing of electron pairs between the atoms.
With ionic bonds, there is complete transfer of valence electrons between atoms. Formed by the interaction of a metal with a non-metal.
Where:
Electrons aren't transferred in covalent bonds.
Protons aren't transferred in covalent bonds
Protons aren't shared in covalent bonds
N3-
C4+
Cl-
Si4+ = Metal
O2- = Non-metal
Al3+ = Metal
Li+ = Metal
Ca2+ = Metal
Br 1-, 1+, 5+ = Halogen
N2 = N3- and N3- Covalent
CCl4 = C4+ and Cl- x4 Covalent
SiO2 = Si4+ and O2- x 2 Metal with non metal Covalent
AlCl3 = Al3+ and Cl- x 3 Covalent Though this one is complex as to why because it seems like it should be ionic
CaCl2 = Ca2+ and Cl- x 2 Metal with non-metal Ionic
LiBr = Li+ and Br- Covalent as neither is a non-metal
a) How many grams of iron can be made from 6 moles H2
Answers
223.4 g of iron can be formed from 6 moles of hydrogen gas.
Explanation:
Fe₂O₃(s) + 3 H₂(g) → 2 Fe(s) + 3 H₂O(l)
Since the given equation is the balanced one, we need 3 moles of hydrogen gas to make 2 moles of iron, so the molar ratio is 3:2. So, from 6 moles of hydrogen gas, we can make few moles of iron as,
Molar mass of iron = 55.85 g
So amount of iron produced = 4 moles × 55.85 g/mol = 223.4 g of iron