Answer:
c. Tomatoes, chocolate, and a desk
Explanation:
All are composed of atoms
Sunlight has no atoms, only photons
Sound has no atoms, only energy
Electricity has no atoms, movement of electrons or positrons, not full atoms.
Answer:Hydrogen and Helium
Explanation: Young stars would contain first hydrogen, then helium.
Answer:
18 O, 17 O, and 16 O
Explanation:
three naturally stable isotopes
Answer:
The volume would be 24, 3 L.
Explanation:
We apply the ideal gas law, we convert the unit of temperature in celsius to degrees Kelvin, we clear the volume of the formula and we use the constant R of the ideal gases that has a value of 0.082 l atm / K mol:
0°C= 273 K ---> 35°C= 273 + 35= 308K
PV=nRT ---> V= nRT/P
V= 1 mol x 0.082 l atm / K mol x 308 K/ 1 atm= <em>25, 256 L</em>
Answer:
0.4g/mL
Explanation:
The following data were obtained from the question:
Mass = 2g
Volume = 75 — 70 = 5mL
Density =?
Density = Mass /volume
Density = 2/5
Density = 0.4g/mL
The density of the substance is 0.4g/mL
