The number that needs to go in the blank is -20
Answer:
The concentration of hydrogen ions in moles per liter (M) is 
Step-by-step explanation:
As we know
The hydrogen ion concentration of any solution at pH is given by

Substituting the given values in above equation, we get -
mol/l
The concentration of hydrogen ions in moles per liter (M) is 
Answer:
8 hours
Step-by-step explanation:
23 + 3x = 5x + 7
First would be to subtract 3x from both sides to maintain equality.
23 = 2x +7
Then subtract 7 from both sides
16 = 2x
Finally divide by 2 from both sides to solve for x
8 = x
5 animals are going towards the river .
<u>Step-by-step explanation:</u>
Here we have , One rabbit saw six elephants while going to the river. Every elephant saw 2 monkeys going towards the river. Every monkey holds one parrot in their hand.We need to find How many animals are going towards the river . Let's find out:
- 1 rabbit saw 6 elephants while going to the river. i.e. rabbit is only going towards river !
- Every elephant saw 2 monkeys going towards the river. From the sentence , each of the 6 elephants saw 2 monkeys going towards the river, hence will be 6 x 2 = 12 monkeys going towards the river.
But, the statement does not explicitly say that “Every elephant saw 2 DIFFERENT monkeys…”, therefore implicit rules apply and infer that the 2 monkeys are the same. So , every elephant saw 2 monkeys!
- Now , every monkey holds 1 parrot in their hands. 2 parrots are going towards the river.
So , total number of animals is :
⇒ 
⇒ 
Therefore , 5 animals are going towards the river .
Answer:
k=-2
Step-by-step explanation:
-1*-2=2
-1*-2=20*-2=0
-1*-2=20*-2=02*-2=-4
-1*-2=20*-2=02*-2=-45*-2=10