Answer:
353kg
Explanation:
2000 x 0.1765 = 353kg
for every 1 cubic metre of helium there is 0.1765 kg of it
the balloon is holding 2,000 cubic metres of the helium.
That means that there are 2000 times of 0.1765kg of helium in the balloon
so you times 0.1765kg by 2000
Alexander Fleming and penicillin is used to help fight gram positive bacteria and other bacterial infections
A balanced equation for the precipitation of barium sulfate after mixing aqueous ammonium sulfate and barium chloride is as follows:
(NH₄)₂SO₄ (aq) + BaCl₂ (aq) ------> BaSO₄(s) + 2NH₄Cl (aq)
As suggested by the equation, 1 molecule of ammonium sulfate reacts with 1 molecule of barium chloride and forms 1 molecule of barium sulfate and 1 molecule of ammonium chloride.
<h3>
Answer:</h3>
1.380 × 10^-8 M
<h3>
Explanation:</h3>
The pH is the measure of alkalinity or acidity of a substance.
It is the negative logarithm of H+ ions concentration [H+].
pH = -log[H+]
pOH on the other hand is negative logarith of OH- concentration [OH-].
pOH = -log[OH-]
In this case;
pOH = 7.86
We can calculate the [OH-]
pOH = -log[OH-]
But, pOH = 7.86
pOH = -log[OH-]
-log[OH-] = 7.86
[OH-] = Antilog -7.86
= 1.380 × 10^-8 M
Therefore, [OH-] is 1.380 × 10^-8 M
Answer:
See Explanation
Explanation:
If we consider the conductivity values of group A compounds, we will notice that all group A compounds all possess a very high conductivity values each.
These high conductivity values are consistent with ionic compounds which completely dissociate in solution thereby making mobile ions available.
Hence, group A compounds are ionic and completely dissociate in solution.