Answer:
8.7
Explanation:
A weak acid and a strong base will form a more basic salt.
2.0 is more acidic, you'll usually see this from a reaction between a strong acid and a weak base.
6.8 and 7.0 are neutral (or close to neutral) and are formed from reactions between weak acids and weak bases, or strong acids and strong bases.
Given the mass of CO2 =15.02 g
Moles of 
=
Mass of H2O = 2.458 g
Moles of 
=
Moles of C = 
Moles of H = 
Mass of C in the sample = 
Mass of H = 
=0.275 gH
Mass of O in the sample = 5.467 g - (4.095 g +0.275 g) = 1.097 g O
Moles of O = 
Simplest mole ratios of the elements in the compound:
Therefore the empirical formula of the compound is 
Some material from meteors lingers in the mesosphere, causing this layer to have a relatively high concentration of iron and other metal atoms. Very strange, high altitude clouds called "noctilucent clouds" or "polar mesospheric clouds" sometime form in the mesosphere near the poles.
I really hope this helps! I wish you the best of luck!
Answer:
Explanation:
Step 1
The question is based on the concept of PH and pOH calculations.
pH is defined as negative logarithmic of hydronium Ion concentration.
while pOH is defined as negative logarithmic of hydroxide ion concentration of the solution.
Step 2
[H+] = 7.7*10-7 M
pH = -log[H+]
= -log ( 7.7*10-7 )
= 6.12
Step 3
pOH = 14 - pH
= 14 - 6.11
= 7.89
i need help ls i thank its book 500 grams
