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True [87]
3 years ago
5

Pls help me brainliest, rattings etc its 2 questions and I am very confused! 8 pts!

Chemistry
2 answers:
xenn [34]3 years ago
8 0

Question 10 is the decomposition of water. The left side is 2 water molecules, while the right side is two hydrogen molecules and 2 oxygen molecules.

Question 11 consists of calculating the amounts of atoms on each side. Since the left side has 6 hydrogen atoms, the right side must as well. On the right side, hydrogen has a 2. So divide 6 by 2 to find the coefficient (3). You can confirm the answer by confirming the oxygen is the same on both sides (it is).

Serjik [45]3 years ago
6 0
Ouestion no 10 answer is first and 11 is 3
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What is the [ H3O+] of a solution with pH = (8.50x10^0)? enter your answer in scientific notation and with three sig figs.
erastovalidia [21]

Answer:

[H₃O⁺] = 3.162 × 10⁻⁹ moles / liter

Explanation:

The pH is calculated with the formula:

pH = -lg[H₃O⁺]

From here the concentration of hydronium ion (H₃O⁺) will be:

[H₃O⁺] = 10^{-pH}

[H₃O⁺] = 10^{-8.5}

[H₃O⁺] = 3.162 × 10⁻⁹ moles / liter

3 0
3 years ago
Read 2 more answers
PLEASE PLEASE PLEASE​ ANSWER HAVE MERCY 35 POINTS
Arada [10]
You should give answers since some people will just try and find any answer, which happened to me. So like if you have answers for the question just put them like A B C D kinda like true or false for others to know what they got instead of giving them more work, and then they just give you random answers.
6 0
3 years ago
What is the pOH of a 0.025 M [H+] solution? A.0.94 B.1.60 C.12.40 D.13.06
Greeley [361]

Answer:

option C= 12.40

Explanation:

Formula:

pH + pOH = 14

First of all we will calculate the pH.

pH = - log [H⁺]

pH = - log [0.025]

pH = - (-1.6)

pH = 1.6

Now we will put the values in formula,

pH + pOH = 14

pOH = 14-pH

pOH = 14 -1.6

pOH = 12.4

The pOH of solution is 12.4.

6 0
3 years ago
A gas with a volume of 4.0L at a pressure of 205 kPa is allowed to expand to a volume of 12000 mL. What is the pressure in atmos
Leni [432]

Answer: The pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto \frac{1}{V}     (At constant temperature and number of moles)

P_1V_1=P_2V_2  

where,

P_1 = initial pressure of gas  = 205 kPa

P_2 = final pressure of gas = ?

V_1 = initial volume of gas  = 4.0 L

V_2 = final volume of gas = 12000 ml = 12 L    (1L=1000ml)  

205\times 4.0=P_2\times 12  

P_2=68.3kPa=0.674atm        (1kPa=0.0098atm)

Therefore, the pressure in atmospheres is 0.674 in the container if the temperature remains constant.

8 0
3 years ago
Which of these events leaves small pieces of rocks in new places? (4 points)
icang [17]
A. deposition

this means that it was moved from one place to another and can be transported by ice, water, gravity, or wind.
5 0
2 years ago
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