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3 years ago

HELP ASAP !!!!!

Chemistry

1 answer:

Anna35 [415]3 years ago

3 0

Answer:

Explanation:

Take a random sample of nuts from the jar. Let's take two handfuls, after shaking the jar and mixing the nuts thoroughly. Separate the nuts into almonds and cashews. Count each pile, then do the following calculation (these numbers are random, for example only).

Count Percentage %

Almonds 38 (38)/(87)x100

Cashews 49 49/87x100

87 87/87 = 100%

Ratio of Almonds to Cashews: 38/49

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What is the specific heat (J/g C)of a metal who’s temp increases by 3.0 C when 17.5 g of metal was heated with 38.5 J

disa [49]

Answer:

0.733 J/g °C

Explanation:

Step 1 : Write formule of specific heat

Q = mc Δ T

with Q = heat transfer (J)

with m = mass of the substance

with c = specific heat ⇒ depends on material and phase ( J/g °C)

Δ T = Change in temperature

in this case :

Q = 38.5 J

m = 17.5g

c= has to be determined

Δ T = 3 (°C)

Step 2: Calculating specific heat

⇒ via the formule Q = mc Δ T

38.5 J = 17.5g * c * 3

38.5 = 52.5 *c

c = 38.5 / 52.5

c = 0.733 J/g °C ⇒ 0.733 is reported to three significant digits due to the precision.

The specific heat of this metal is 0.733 J/g °C

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Answer:

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Explanation:

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A student needed to dissolve a substance that she knew was soluble in water. according to the chart, which other solvent would m

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The chart is attached below and the options are as follow,

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Answer:
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Explanation:
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Vesnalui [34]

Answer:

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Explanation:

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Gibbs free energy, ΔG, is released during a spontaneous process and hence the ΔG is negative because the reactants have more free energy than the products, hence, no energy input is needed for the reaction to proceed forward but rather an energy output. This is what makes a negative ΔG depict a spontaneous reaction.

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