87.07 torr
Explanation:
n:7.7059 g-5.9203 g= 1.7856 g
Molar mass of benzene = 78.11g/mol
n=1.7856 g /78.11g/mol= 0.023 mol
T= 273 + 28 = 301 K
PV=nRT.
Weget
P=nRT/V
P=(0.023 mol x 8.3 J/molK x 301 K) / 0.00495m3= 11608. 3Pa= 87. 07 Torr
Answer: 87. 07 Torr
A atomic number hope i helped
Answer:
Chadwick-he discovered the neutron. He discovered this by demonstrating a neutral particle with a mass the same as a proton through a reaction between gramma Ray's and a wax sample.
Rutherford-he discovered the concept of radioactive half-life, the radioactive element radon, and named alpha and beta radiation.
j.j.Thompson discovered that atoms where made up of smaller components. This had major effects for the field of physics.
:)
It attempts to describe and account for the properties of molecules and atoms and their constituents—electrons, protons, neutrons, and other more esoteric particles such as quarks and gluons.
Answer:
3.01 × 10^24 atoms of vitamin D
Explanation:
The number of atoms, molecules or ions present in a substance is given by the Avogadro's number which is 6.02 × 10^23.
Hence;
1 molecule of vitamin D contains 6.02 ×10^23 atoms
5 molecules of vitamin D contains 5 × 6.02 ×10^23/1
= 3.01 × 10^24 atoms of vitamin D