Abba

How many moles of oxygen are present in 8g of oxgen gas.

you have a 0.200L of solution containing 250mM phosphate buffer, pH 6.8. An equivalent amount of HCl/NaOH with respect to the total amount of phosphate in the buffer --> mmol of NaH2PO3 + mmol of NaH2PO4 = 50 mmoles. What would the pH of the above buffer...

Write up the recipe to make 100mL of a 200mM phosphate buffer, pH 7.0 by using: (a) only NaH2PO4 (MW 120g/mol) and NaOH (1.00M) (b) only Na2HPO4 (MW 142g/mol) and HCl (1.00M) (c) only Na2HPO4 and NaH2PO4 Please help me. I don't seem to understand how to e...

A stone wirelesd at the rope 30cm long makes 10 complete revolution in 25 second

A stone is whirled at the end of a rope 30cm long,makes 10 complete revolution in 2 seconds.find (1)the angular velocity in radians per seconds.(2)the linear speed (3)the distance

A pulley system of 4 pulleys is used to raise a loan of mass 50kg vertically,if its effeciency is 80%,determine the minimum effort required to raise the load(g=10ms-2)?

Given that 1/y-2x, 1/y, 1/y-2z are in A.P, prove that x(y-z), xz, z(y-x) are also in A.P.

T=3s

How did you solve it? I wasn't really looking for an answer but the process because I don't really get it.

Thank you so much!

for 1) I got 7.42 after trying. I wanted to confirm if it is right to see if I got the process right?

Mallam gaji

The density of mercury is 1•36×10^4kgm^3 at 0°c calculate it values at 100°c and at 22°c take 3 linear expansivity if mercury 180×10^6k^1

Answer

I need your help on this

Ibrahim

Calculate the gravitational force of attraction between two protons in a chemical compound.Take the mass of proton as 0.0000000000000000000000000000167 kilogramme and the distance between the protons in a chemical compound is 0.000000000010 metre