1945783
Beschreibung
Quiz von greenchloe1998, aktualisiert more than 1 year ago
|
|
Erstellt von greenchloe1998
vor mehr als 9 Jahre
|
|
Frage 1
Frage
find the relative formula mass (Mr) of water. ( H20)
Antworten
-
18
-
24
-
36
-
72
Frage 2
Frage
calculate the percentage of nitrogen in NH3.
Antworten
-
82.4
-
78
-
34.6
Frage 3
Frage
The moles of an element = mass of that element/ the relative atomic mass of that element. Sarah has 48 grams of magnesium, she believes she has two moles, is she right?
Antworten
- True
- False
Frage 4
Frage
What are the advantages of hard water?
Antworten
-
Prevention of heart disease.
-
it makes you feel happy
-
it contains minerals which may be good for your health.
Frage 5
Frage
If I add soap to water and it easily forms a lather, is it hard or soft water?
Antworten
-
Hard water
-
Soft water
Frage 6
Frage
Which compounds are dissolved into temporary hard water?
Antworten
-
Magnesium hydrogen carbonate and Calcium hydrogen carbonate.
-
Magnesium sulfate and calcium sulfate.
Frage 7
Frage
when boiling temporary hard water, what is the product it forms?
Antworten
-
rust
-
limescale
-
nasty worms
Frage 8
Frage
Name the disadvantages of hard water.
Antworten
-
more soap is needed to form a suitable lather.
-
It is bad for your eyes
-
it produces scum which is difficult to clean
-
Hard water cannot be used for industrial processes like dying materials.
Frage 9
Frage
Advantages of hard water. ( choose 3)
Antworten
-
calcium helps growth of healthy bones and teeth.
-
magnesium helps an effective metabolism
-
less likely to suffer from heart disease.
-
the chemicals within it make you happier
-
it will help you succeed in your life.
Frage 10
Frage
calcium + sodium carbonate forms what?
Antworten
-
soluble sodium ions + Calcium carbonate (limescale)
-
calcium stearate.
Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.