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kicyunya [14]
4 years ago
7

You aren't sure if your pH meter needs to be calibrated, so you put it in a buffer solution that has a known pH of 7. You take f

our separate readings of the solution with the pH meter. The meter reports the pH as 5.5, 8.6, 6.3, and 9.4. Were the measurements accurate, precise, neither, or both?
Chemistry
1 answer:
Roman55 [17]4 years ago
5 0

Answer:

Neither

Explanation:

Even though the average between the 4 measurements is 7.45, the measurements are not accurate. This is probably due to the pH meter being out of calibration or because there is some contamination in the buffer solution

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How to balance Cl2(g) + KBr(aq)
zzz [600]

Answer:

Cl₂(g) + 2 KBr(aq) ⇒ Br₂(l) + 2 KCl(aq)

Explanation:

Let's consider the unbalanced single displacement reaction between chlorine and potassium bromide.

Cl₂(g) + KBr(aq) ⇒ Br₂(l) + KCl(aq)

We will start balancing Cl atoms by multiplying KCl by 2.

Cl₂(g) + KBr(aq) ⇒ Br₂(l) + 2 KCl(aq)

Finally, to get the balanced equation, we have to multiply KBr by 2.

Cl₂(g) + 2 KBr(aq) ⇒ Br₂(l) + 2 KCl(aq)

3 0
3 years ago
What type of compound is cu2so4
Ilia_Sergeevich [38]

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3 years ago
Cu is in FCC structure. We know that even at close to melting temperature, vacancies are still sparsely distributed, i.e., it is
sveticcg [70]

Answer:

6

Explanation:

FCC is face centered cubic lattice. In FCC structure, there are eight atoms at the eight corner of the cubic unit cell and one atom centered in each of the faces. FCC unit cells consist of four atoms, (8/8) at the corners and (6/2) in the faces.

Given that, Cu has FCC structure and it contains a vacancy at origin (0, 0, 0). And there is no other vacancy directly adjacent to the vacancy at the origin. So, all the adjacent positions contain Cu atoms. Hence, the total number of adjacent atoms of the vacancy at origin can jump into this vacancy.

the above FCC unit cell clearly indicates that there are six adjacent atoms adjacent to the vacancy at origin

So, the total number of adjacent atoms of the vacancy at origin can jump into this vacancy is 6.

5 0
3 years ago
Which liquid has the lowest vapor pressure at 65°C?
Paraphin [41]
- - <span>(1) ethanoic acid



</span>Ethanoic acid is the <span>liquid that has the lowest vapor pressure at 65</span>°<span>C




</span>
7 0
4 years ago
Read 2 more answers
According to model 1, how many grams of grass does herbivore a eat each day?
ICE Princess25 [194]
I don't know what model you're referring to so I can't answer the question. However, upon researching, I found a similar problem. I posted it as an attached picture. Looking at the model, the amount of grams a herbivore eat each day corresponds to the arrow pointing inwards. Since the label says 4.0 g, <em>the answer is 4 g per day</em>.

8 0
3 years ago
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