Answer: B - Cr(NO3)2
Explanation: The +2 on Chromium and the -1 on NO3 indicates the charge. And in order to balance out the charge, you will sometimes need to add more of a substance.
In this case, Cr has a +2 charge and NO3 has a -1 charge. To balance, the total charge needs to equal 0. So, you add another NO3 to make two -1 charges, which will cancel out the +2 charge on Cr.
Answer:
an increasng atomic number/ increasing proton count
Explanation:
Sea water has salt so not that or a it is vineger mixed with water.c
Answer:
a) blue vitriol: copper (II) sulfate pentahydrate, b) slaked lime: calcium hydroxide, c) oil of vitriol: Sulfuric acid, d) washing soda: sodium carbonate, e) muriatic acid: hydrochloric acid, f) epsom salt: magnesium sulfate, g) chalk: calcium carbonate, h) dry ice: carbon dioxide, o) baking soda: sodium bicarbonate, j) lye: sodium hydroxide.
Explanation:
Answer:
It will take 950 million years for this amount of urea to be hydrolyzed under the same conditions in the absence of urease.
Explanation:
Given that:
- In the presence of urease:
Urease enhances the rate of hydrolysis by = 10^14
Time taken in hydrolysis is 5 min
- In the absence of urease:
Time taken in hydrolysis will be = 5 min x 10^14
Now, converting minutes into years
Time = (5 min x 10^14) / (60 min/hr x 24 hr/day x 365 days/year)
Time = 9.50 x 10^8 years
Time = 950 X 10^6 years
Time = 950 million years