O1. Precautions to be kept in mind while handling substances with low ignition temperature.

Q2. Judge the importance of attainment temperature.

Q3. Why different substances have different ignition temperatures?.

Q4. Do you think substances with low ignition temperature or with high ignition temperature are good in terms of efficiency?.

If i make a solution by adding 83grams of sodium hydroxide to 750ml i’d water what is the molarity of sodium hydroxide

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false