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Paladinen [302]
3 years ago
13

Open this simulation and click the Macro tab. The simulation allows you to check the pH scale of various liquid solutions. To ge

t started, go to the drop-down menu at the top of the page and select a liquid from the list. Use the dropper below the drop-down menu to add the liquid to the container. You can change the concentration of the solution
by adding water using the tap on the right. You can also drain the solution using the tap near the left of the container. At any point, check the pH scale of the solution by dragging the green scope to the container. Try checking the pH level of different solutions, and then answer the following questions.
Part A
What information does this computer model provide

Chemistry
1 answer:
vredina [299]3 years ago
4 0

Answer:The model shows how adding water to a fluid changes its concentration and, in turn, its pH.

Explanation:

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Please help last assignment of the day
Andrej [43]

In this qn, you use the mole formula,

amount (mol) = mass (g) ÷ molar mass

(molar mass is the mass number of an element, which u can find by referring to the periodic table)

so by subbing in the values given to you, you can find the answer

5. amount of Cu = 55.9 ÷ 63.5 = 0.880mol (3sf)

6. amount of N2 = 340 ÷ 2(14.0) = 12.1mol (3sf)

(note: you multiply the molar mass of N by 2 as there are 2 N atoms)

for qn 7 and 8, youre finding the mass and not the amount. By bringing the molar mass over to the other side of the formula, you get

mass = amount (mol) × molar mass

thus,

7. mass of Fe = 0.063 × 55.8 = 3.52g (3sf)

8. mass of H2 = 94.7 × 2(1.0) = 47.4g (3sf)

extra things to take note of:

- likewise, you can also find the molar mass of an element by using

molar mass = mass(g) ÷ amount(mol)

^^ this is commonly only needed when you need to find the molar mass of an isotope. the question will give you the amount and mass of the element, and you just need to factor them in to find your answer.

- typically, you use 3 sf in your final answer and 5sf in your working. remember to write (3sf) at the end of your number statement when necessary.

- when you get an answer of (eg.) 0.6mol, you still need to write it in 3sf, so your answer would be 0.600mol

3 0
3 years ago
12. If a substance has a pH of 3.5, is it<br> acidic or basic?
dolphi86 [110]
The answer is acidic.

pH < 7 = acidic

pH > 7 base
6 0
3 years ago
How do properties move if in solid
Schach [20]

Answer:

In the solid phase, the forces of attraction have completely overcome molecular motion, and the movement of the particles has been reduced to vibrating in place. The particles cannot move past one another and are held in a tightly-packed pattern, so there is very little space between the particles.

5 0
3 years ago
Would an earthquake support the principle of uniformitarianism or the principle of catastrophism? Explain.
liberstina [14]

Question: Would an earthquake support the principle of uniformitarianism or the principle of catastrophism? Explain.

Answer: Catastrophism was the theory that the Earth had largely been shaped by sudden, short-lived, violent events, possibly worldwide in scope. This was in contrast to uniformitarianism (sometimes described as gradualism), in which slow incremental changes, such as erosion, created all the Earth's geological features.

Hope this helps, have a good day. c;

3 0
3 years ago
I really need some help!!!!!!
7nadin3 [17]
The earth revolves around the Sun, which is at the centre of our solar system. The moon revolves around the earth as a natiral satellite.

Hope I helped!! xx
7 0
3 years ago
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