Answer:
Zinc mercury transition metal
Silicon boron metalloid
Oxygen nitrogen non metal
Sodium alkali metal
Explanation:
Phenolphthalein is an indicator used in chemistry to detect acidic or basic/alkaline solutions.It is often used in the lab as an indicator used to carry out accurate titration using soluble reactants.
Hi! It's simple you just have to multiply 107 times 27 which is 2,889 pounds
Carbon fixation<span> refers to the conversion process of inorganic </span>carbon<span> (</span>carbon <span>dioxide) to organic compounds by living organisms. The most prominent example is photosynthesis, although chemo synthesis is another form of </span>carbon fixation<span> that can take place in the absence of sunlight.</span><span />
Answer:
Kr
Explanation:
Now we have to apply Graham's law of diffusion in gases
t1/t2 = √M1/M2
If t1 is the time of diffusion of Xe = 75 seconds
t2 is the time of diffusion of the unknown gas = 60 seconds
M1= molar mass of Xe=131.293
M2= molar mass of the unknown gas
Thus;
75/60 = √131.293/M2
(75/60)^2= (√131.293/M2)^2
5625/3600=131.293/M2
M2= 3600×131.293/5625
M2= 84.0
The unknown gas is krypton (Kr)
