We need moles of Ca(OH)_2
- Molarity=Moles/Volume in L
- 0.025=Moles/1.5
- Moles=1.5(0.025)
- Moles=0.0375mol
Molar mass of Ca(OH)_2=74g/mol
Now
- Mass=Molar mass×Moles
- Mass=0.0375×74
- Mass=2.77g
Option C
D. 18 as the elements in this group are the noble gases which exist as monoatomic elements with a full outer shell
Answer:
The corona shines only about half as brightly as the Moon and is normally not visible to the unaided eye, because its light is overwhelmed by the brilliance of the solar surface. During a total solar eclipse, however, the Moon blocks out the light from the photosphere, permitting eye observations of the corona.
Answer:
water
Explanation:
or h2o i mean theyre the same thing soo..
At equivalence there is no more HA and no more NaOH, for this particular reaction. So that means we have a beaker of NaA and H2O. The H2O contributes 1 x 10-7 M hydrogen ion and hydroxide ion. But NaA is completely soluble because group 1 ion compounds are always soluble. So NaA breaks apart in water and it just so happens to be in water. So now NaA is broken up. The Na+ doesn't change the pH but the A- does change the pH. Remember that the A anion is from a weak acid. That means it will easily attract a hydrogen ion if one is available. What do you know? The A anion is in a beaker of H+ ions! So the A- will attract H+ and become HA. When this happens, it leaves OH-, creating a basic solution, as shown below.
