doing
MSDS
drink
eat
mix
goggles
safety shower
water
acids
Rule number one in laboratory safety is know what you are
doing
.
The best protections from chemical splashes and spills are an ________
to cover your body and _________
for your eyes.
Never
eat
food or
drink
liquids from a lab container, even if it has been thoroughly washed.
Rinse skin thoroughly with
water
after a chemical splash.
A _________
should be used for more significant spills.
Pour
acids
into water, never the other way around.
Do not
mix
chemicals unless you know what the product of the reaction will be.
A _________
describes important safety and reactivity information about a chemical.
Fill in the blanks please
What is the pressure, in atm, of the methane gas?
Express the answer using 3 significant figures.
atm
Answer:
P = 0.979 atm
Explanation:
Given data:
Number of moles of methane = 40.8 mol
Volume of container = 1020 L
Temperature = 298 K
Pressure of gas =?
Solution:
According to ideal gas equation,
PV = nRT
P = pressure
V = volume
n = number of moles
R = general gas constant
T = temperature
Now we will put the values,
P = nRT/V
P = 40.8 mol × 0.0821 atm.L/mol.K × 298 K / 1020 L
P = 998.2 atm /1020
P = 0.979 atm
differentiate benzene and cyclohexane
(b) mass number
(c) number of electron shells
(d) number of valence electrons
Answer;
- (d) number of valence electrons
The elements in Group 2 have similar chemical properties because each atom of these elements has the same number of valence electrons.
Explanation;
-Group 2 elements are also called alkaline earth metals, such as calcium, magnesium, strontium, barium , etc.
-These metals have a valency of two, which means they have two electrons in the outermost energy shell. Therefore; they react by loosing two electrons to form a stable configuration or an octet configuration. They are highly metallic and are good conductors of electricity.
value is equal to the accepted value?