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anyanavicka [17]
3 years ago
11

What is a problem solving by following steps to draw a conclusion?

Chemistry
1 answer:
FromTheMoon [43]3 years ago
5 0
I think you want to ask about the steps of problem solving. The basic steps are state the problem, form a hypothesis, test the hypothesis, collect the data, analyze the data and draw conclusions.
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Which pair of compounds represents one Arrhenius acid and one Arrhenius base?
erica [24]

Answer: C. HNO3 and NaOH

Explanation:

Arrhenius acid produces hydogen ion (H+) when dissolved in water. An example of Arrhenius acid is HNO3.

Arrhenius base produces hydroxyl ion (OH-) when dissolved  water. An example of Arrhenius base is NaOH.

4 0
3 years ago
Which is a gas at room temperature?
BigorU [14]

Answer:

B) nitrogen

the Earth's atmosphere is mostly nitrogen

3 0
3 years ago
A solution is made by mixing 50 ml of 2.0m k2hpo4 and 25 ml of 2.0m kh2po4. the solution is diluted to a final volume of 200 ml.
Volgvan

50 mL of 2.0 M of K_2HPO_4 and 25 mL of 2.0 M of KH_2PO_4 were mixed to make a solution

Final volume of the solution after dilution = 200 mL    (given)

Final concentration of K_2HPO_4, [K_2HPO_4] = \frac{50 mL\times 2 M}{200 mL} = 0.5 M

Final concentration of KH_2PO_4, [KH_2PO_4] = \frac{25 mL\times 2 M}{200 mL} = 0.25 M

Using Hasselbach- Henderson equation:

pH = pK_a+ log \frac{[salt]}{[acid]}

pka of KH_2PO_4 = 6.85

Substituting the values:

pH = 6.85+ log \frac{0.5}{0.25}

pH = 6.85+ log 2

pH = 6.85+ 0.3 = 7.15

Hence,  the pH of the final solution is 7.15.

8 0
3 years ago
Read 2 more answers
What the name for the color of the powder left behind when a mineral is rubbed across a hard surface? A. luster B. streak C. ten
oksano4ka [1.4K]

The answer to your question is,

B. Streak

-Mabel <3

8 0
3 years ago
Read 2 more answers
You have 286.7g of PbO. For lab, you need 2.50M PbO. How much PbO can you make? Don't forget your units.
blsea [12.9K]

Answer:

0.514 L (liters)

Explanation:

  • I took the Quizziz, and hope this helps!
4 0
3 years ago
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