Answer:
See below.
Step-by-step explanation:
The two isotopes are Cl-35 and Cl-37.
The average atomic mass (35.45 u) is closer to 35 u, so most of the atoms are Cl-35.
mass number = number of protons + number of neutrons
A = p + n
35 = 17 + n
n = 35 – 17
n = 18
∴ Most chlorine atoms contain 18 neutrons.
Answer:
a) 1:1
Explanation:
By the ideal gas law:
PV = nRT
Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is temperature.
Both ballons are at the same conditions, so the gases have the same temperature and pressure. The number of moles is the mass(m) divided by the molar mass (Mr). The molar masses are:
Mr(Ne) = 20 g/mol
Mr(Ar) = 40 g/mol
Calling 1 for Ne, and 2 for Ar:
P1*V1 = (m1/20)*R*T1
m1 = 20P1V1/RT1
P2*V2 = (m2/40)*R*T2
m2 = 40P2V2/RT2
V1 = 2V2
m1/m2 = (20P1V1/RT1)/(40P21V2/RT2)
P1 = P2, T1 =T2 so they can be canceled, such as the R:
m1/m2 = 20V1/40V2
m1/m2 = 20*2V2/40V2
m1/m2 = 40V2/40V2
m1/m2 = 1/1
m1:m2 = 1:1
Smell is a huge part, some bacteria have a unique smell. Depending on oxygen present..... fermentation for some bacteria. Can be noticed through a pH indicator in a media.
<span>Also many differential stains will assist in this.... </span>
<span>Gram, Capsole, Spore...ect.</span>
Answer:
group 2
Explanation:
because they are the only alkalines earth metals on the periodic table