Answer:
SO2(g) + O2(g) SO3(g) (needs to be balanced. Balance it by placing a 1/2 in front of the 02.) This is a 5-sig-fig problem, so when you calculate your molar masses, you must use all of the sig figs available to you from the periodic table. That's how you can get this problem correct. Melissa Maribel likes to round the numbers from the periodic table, and usually that is ok. But for problems where you have many sig figs, your molar masses from the periodic table must have at least as many sig figs as your data. Therefore, for each oxygen atom, please use 15.9994 g/mol. For each sulfur atom, please use 32.066 g/mol. Thank you.
N2 has the optimal bond order of 3. To form N2+, one bonding electron is removed, giving a bond order of 2.5. Similarly, to form N2-, one antibonding electron is added, also giving a bond order of 2.5.
<span>Sodium
matches with malleable, soft and shiny
These are tyipical properties of alkalyne metals. You can cut sodium with a knife as it is very soft.
Bromine matches with highly reactive gas
Bromine is an halogen and indeed is very reactive
Silicon matches with has
properties of both metals and nonmetals
Silicon is a metaloid so it has some properties of metals and some of nonmetals.
Argon matches with non reactive gas.
Argon is a noble gas, and as such it is not reactive.
</span>
Sodium Carbonate(NaCO3) gives off heat hence the reactions involving Na2CO3 are exothermic.
Hope this helps!
Answer:
The correct litmus test for an acid is:
blue litmus turns red
Explanation:
Litmus paper : It is a paper which contains 14 -15 dyes obtained from Lichens
It is also called <u>Acid-Base Indicator</u>
It is used to test whether the given solution is acidic or not.
If the solution is<u> acidic the litmus turns Red</u>
If the solution is<u> basic the litmus turns Blue</u>
<u>How to perform Litmus Test :</u>
Place the drop of given solution over the litmus paper.
If the Litmus paper is Blue initially and On adding a drop of given solution , it turn red then it indicate that the solution is acid with pH = 3 to 7
Red litmus paper does not change its color if the solution is acidic .
If the Litmus paper is Red initially and On adding a drop of given solution , it turn Blue then it indicate that the solution is alkaline . pH= 4 to 12
Blue litmus does not change its color in the presence of alkaline solution.