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Fofino [41]
3 years ago
14

Why would you use a solution, such as a cabbage pH indicator, to measure the pH of household items? to see if food went bad to t

est the safety of water to make sure conditions are safe to use up old cabbage
Chemistry
2 answers:
san4es73 [151]3 years ago
4 0

Answer: ABC

Explanation:

storchak [24]3 years ago
4 0

Answer: to see if food went bad, to test the safety of water, to make sure conditions are safe

Explanation:

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Which properties make a metal a good material to use for electrical wires? malleability and reactivity conductivity and ductilit
Schach [20]
The metal properties that make up electrical wires are conductivity and ductility. Conductivity is important for free electrons to flow, hence electricity. Ductility is as well integral for strips to be formed, but with ample strength that does not break the material.
3 0
2 years ago
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A mixture of gases A2 and B2 are introduced to a slender metal cylinder that has one end closed and the other fitted with a pist
REY [17]

Answer:

q < 0, w > 0, the sign of ΔE cannot be determined from the information given

Explanation:

Determination of sign of q

Temperature of the water bath before the reaction = 25 °C

Temperature of the water bath after the completion of the reaction = 28 °C

After the completion of the reaction, temperature of the water bath is increased that means heat is released during the reaction and flows out of the system.

If heat is absorbed by the system, then q is indicated by positive sign and if heat is released by the system, then q is indicated by negative sign.

As in the given case, heat is released by the system, so sign of q is negative, or q < 0

Determination of sign of w

After the completion of the reaction, piston moved downward, that means volume of the system decreases or compression occur. During the compression, work is done on the system.

if work is done on the system, sign of w is positive.

If work is done by the system, sign of w is negative.

In the given case, work is done on the system, therefore sign of w is positive, or w > 0

Determination of sign of ΔE

Relationship between ΔE, q and w is given by first law of thermodynamics:

ΔE = q + w

In this case, q is positive and w is negative, so the sign of ΔE depends of magnitude of q and w. As magnitude of w and q cannot be determined in this case, thus, the given information is insufficient for the determination of sign of ΔE.

So, among the given option, option c is correct.

q < 0, w > 0, the sign of ΔE cannot be determined from the information given

3 0
3 years ago
Help with this please.
chubhunter [2.5K]

Answer:

a

Explanation:

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6 0
2 years ago
7. How many grams are there in 2.5 moles of silver?
exis [7]
2.5 moles of silver is 269.6705 grams
4 0
2 years ago
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Can someone help me, please?
DENIUS [597]
The answer to this question is: B) 3+
7 0
3 years ago
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