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anygoal [31]
3 years ago
15

When a 8 gram slice of bread is burned under a beaker of 4500 grams of water, it heats up the water by 1.3 degrees Celsius. The

specific heat of water is 1 cal/g degree C. How many calories does this slice of bread contain
Chemistry
1 answer:
dezoksy [38]3 years ago
5 0

Answer:

5850\ \text{cal}

Explanation:

m = Mass of water = 4500 g

c = Specific heat of water = 1\ \text{cal/g}^{\circ}\text{C}

\Delta T = Change in temperature of water = 1.3^{\circ}\text{C}

Heat is given by

q=mc\Delta T\\\Rightarrow q=4500\times 1\times 1.3\\\Rightarrow q=5850\ \text{cal}

A slice of the bread contains 5850\ \text{cal}.

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<h2>Hey there! :) </h2>

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2 years ago
How many moles of ions are there in 3 moles of calcium chloride?
klemol [59]

Answer:

9 moles of ions

Explanation:

Our compound is: CaCl₂(s)

We dissociate it:

CaCl₂(aq) → Ca²⁺ (aq) + 2Cl⁻(aq)

Per 1 mol of chloride, we have 1 mol of calcium cation and 2moles of chlorides, so in total we have 3 moles of ions.

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3 years ago
Decide whether a chemical reaction happens in either of the following situations. If a reaction does happen, write the chemical
sineoko [7]

Explanation:

A strip of solid palladium metal is put into a beaker of nicl2

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To answer this question properly you must refer to the reactivity series.

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In this series, Nickel is higher than Palladium. This means that if a Palladium strip is placed into a solution of a Ni salt, then a reaction will not take place, nothing would happen.

Because Pd is lower than Ni in the reactivity series.

There is no reaction so no equation.

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3 years ago
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Answer:

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Explanation:

8 0
2 years ago
0.0045 x 0.000789 sig fig
lesantik [10]

Answer:

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Explanation:

8 0
3 years ago
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