He atom<span> consists of a tiny </span>nucleus<span> surrounded by moving electrons. </span>
Answer:
Calculate the pOH for a solution with a hydroxide ion, (OH-) of concentration of 6.49 X 10-11 M.
Calculate the pH.
Note: the answers should have three significant figures
The pOH is: Blank 1
The pH is: Blank 2
Explanation:
Answer:
9.86*10^(-3) g
Explanation:
PbSO4 ----> Pb^(2+) + SO4^(2-)
s s
Ksp = s²
s =√Ksp = √(1.8*10^-8) = 1.3*10^(-4) mol/L
The molar solubility PbSO4 = 1.3*10^(-4) mol/L.
2.50 *10^2 mL *1L/10³mL =0.250L
1.3*10^(-4)mol/L *0.250L*303.3 g/mol = 9.86*10^(-3) g
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<h2>
WHAT IS A COMPOUND ?</h2><h2>
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ᴛʜᴇ ᴀɴꜱᴡᴇʀ ᴛᴏ ᴛʜɪꜱ ɪꜱ :
ʙᴇᴄᴀᴜꜱᴇ ꜱᴏᴅɪᴜᴍ ɪꜱ ᴀ ᴄᴏᴍᴘᴏᴜɴᴅ.
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Sound is a form of energy is incorrect
Sound is caused by the movement or vibration of matter
