B. This looks like ice turning to water then to steam
Answer:
Na
Explanation:
Cl, S and Na are all in the same period.
The further left an element is in a row of the periodic table, the larger its atomic radius.
Answer:
P = 24.34 atm
Explanation:
V = 5.0L
P = ?
n = 4.75 moles
T = 39.3°C = (39.3 + 273.15)K = 312.45K
From ideal gas equation,
PV = nRT
P = pressure of the gas
V = volume of the gas
n = no. Of moles present
R = ideal gas constant = 0.082atm.L / mol.K
PV = nRT
P = nRT / V
P = (4.75 * 0.082 * 312.45) / 5
P = 121.699 / 5
P = 24.339 atm
P = 24.34 atm
The pressure of the gas is 24.34 atm
The formula to determine the wavelength is, De-Broglie wavelength formula:
-(1)
where, is wavelength, m is mass, v is velocity and h is Planck's constant = =
mass, m = 147 g (given)
Since, 1 g = 0.001 kg
So, 147 g = 0.147 kg
v = 91.0 mph (given)
Converting mph to mps:
Since,
So, =
Substituting the values in formula 1:
Hence, the wavelength wavelength of a 147-g baseball traveling at 91.0 mph is
.
Answer:
Mass = 199.2 g
Explanation:
Given data:
Mass in gram = ?
Number of atoms of C-12 = 100 atom
Solution:
First of all we will calculate the number of moles of C-12 in 100 atoms by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
100 atoms×1 mol / 6.022 × 10²³ atoms
16.6× 10²³ moles
Mass of C-12:
Mass = number of moles × molar mass
Mass = 16.6 × 10²³ mol × 12 g/mol
Mass = 199.2 g