The density of a substance is equal to its mass divided by its volume. In this case, it is equal to 693.8 g divided by 92.5 mL. The density of the substance is then equal to 7.50 g/mL. It has 3 significant figures because in division, the answer will have the least number of significant figures from the given.
Answer:
D. chlorine, oxygen, nitrogen, hydrogen.
Explanation:
- Thomas Graham found that, at a constant temperature and pressure the rates of effusion of various gases are inversely proportional to the square root of their masses.
<em>ν ∝ 1/√M</em>
where ν is the rate of effusion and M is the atomic or molecular mass of the gas particles.
- The molecular mass for the listed gases are:
O₂: 32.0 g/mol,
Cl₂: 70.906 g/mol,
N₂: 28.0 g/mol,
H₂: 2.0 g/mol.
- Hence, the smallest molecular mass of the gas, the fastest rate of effusion.
So, the order from the slowest to the fastest rate of effusion is:
<em>Chlorine, oxygen, nitrogen, hydrogen.</em>
Answer:
How to Draw a Lewis Structure.
Step 1: Find the Total Number of Valence Electrons.
Step 2: Find the Number of Electrons Needed to Make the Atoms "Happy".
Step 3: Determine the Number of Bonds in the Molecule.
Step 4: Choose a Central Atom.
Step 5: Draw a Skeletal Structure.
Step 6: Place Electrons Around Outside Atoms.
Explanation:
Hope this helped! :)
It is 6 which is the atomic number of carbon.
Answer:
3291.84 cm
Explanation:
you would multiply the amount of yards you have by 91.44, since that's how many centimeters there are in 1 yd.