A source region must have certain temperature and humidity properties that can remain fixed for a substantial length of time to affect air masses above it. above it. Air mass source regions occur only in the high or low latitudes; middle latitudes are too variable.

5 0

3 years ago

Calculate the number of milliliters of 0.666 M Ba(OH)2 required to precipitate all of the Pb2 ions in 163 mL of 0.656 M Pb(NO3)2

Sliva [168]

Answer:

161 mL

Explanation:

Pb(NO₃)₂(aq) + Ba(OH)₂(aq) → Pb(OH)₂(s) + Ba(NO₃)₂(aq)

First we calculate how many Pb⁺² moles reacted, using the given concentration and volume of the Pb(NO₃)₂ solution:

163 mL * 0.656 M = 107 mmol Pb(NO₃)₂

As 1 millimol of Pb(NO₃)₂ would react with 1 millimol of Ba(OH)₂, to precipitate 107 mmoles of Pb(NO₃)₂ we would require 107 mmoles of Ba(OH)₂.

Using the number of moles and the concentration we can calculate the required number of milliliters:

0.666 M = 107 mmol / x mL

x mL = 161 mL

5 0

3 years ago

The ISS experiences ___ of Earth’s gravity. 90% 10% 75% 50%

astraxan [27]

Answer:

90%

Explanation:

7 0

3 years ago