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crimeas [40]
3 years ago
15

How many joules of heat are required to heat 131.0 grams of room temperature water (22 °C) to the boiling point?

Chemistry
1 answer:
vampirchik [111]3 years ago
3 0

100.0g x 4.184J/g/°C x 78°C ΔT = 32,645.2 Joules.

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If you had 15 moles of Oxygen (O2), how many moles of water (H2O) would you be able to make?
larisa [96]

Answer:

30 moles of water will produced.

Explanation:

Given data:

Number of moles of O₂ react = 15 mol

Number of moles of water formed = ?

Solution:

Chemical equation:

2H₂ + O₂      →     2H₂O

Now we will compare the moles of water with oxygen.

                  O₂           :          H₂O

                   1             :            2

                   15           :           2×15 = 30 mol

30 moles of water will produced.

                   

5 0
3 years ago
How do you determined the polarity of other componds by first predicting the polarity of water​
fenix001 [56]

Answer:

h20 is water ash a chemical compound

Explanation:

4 0
3 years ago
In the reaction 2 H, Ł02 → 2 H, O, what is the mole ratio of hydrogen to water?
Bogdan [553]

A

because both have 2's in front of them

6 0
3 years ago
Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you t
inessss [21]

Answer:

Sample A - Mixture

Sample B - (can't decide)

Explanation:

We know a mixture as a sample that is made up of two or more substances. Based on the results from the experiment conducted on sample A, the sample is a mixture. Each colour that appeared on the paper represents one of the components of the mixture.

For Sample B, at a particular sharp temperature, the crystals begin to appear. That temperature at which the first crystal appears is actually the melting point of the solid. We were also told that only half of the clear liquid was crystallized meaning that other substances may still be contained in the remaining liquid. Crystallization is a separation technique that depends on differences in melting points of substances. We can't decide if the sample is pure because we have no further information about what happened to the remaining liquid. That would have told us if the liquid remaining was just the solvent used to dissolve B which could have also been evaporated to leave only the pure sample.

4 0
3 years ago
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