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4 years ago

What is calorimetry

Chemistry

1 answer:

Masja [62]4 years ago

5 0

Answer:

The science or act of measuring changes in state variables of a body for the purpose of deriving the heat transfer associated with changes of its state due, for example, to chemical reactions, physical changes, or phase transitions under specified constraints.

Explanation:

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If a compound formula mass was experimentally determined to be 58, the chemical formula could be?

mojhsa [17]

B because that is the one that is logical and the only one that makes sense

3 0

3 years ago

Read 2 more answers

What can happen if you completely fill a bottle with water and put it in a freezer?Give the bonds in play responsible for this e

77julia77 [94]

Answer: if we put a glass bottle completely filled with water in the freezer it can explode.

Explanation:

Most liquids contract as they are cooled, the molecules are moving slower, they can't defeat the intermolecular forces. These intermolecular forces become stronger and when they reach the freezing point they solidify. They are usually tightly packed in a crystalline structure.

Water has a weird behaviour. A water molecule is composed of two atoms of H and one atom of O. The great difference in electronegativity between H and O is what makes the molecule polar. And two molecules of water are attracted together because of what we call hydrogen bonding.

Hydrogen bonding is a special type of dipole-dipole attraction between molecules. This hydrogen bonding tendency gets stronger as the temperature gets lower.

When water freezes, its molecules get arranged in a cystalline structure that has a defined shape. The ice structure is completely hydrogen bonded, and these bonds force the crystalline structure to be very "open". This structure is less dense than liquid water (ice floats in liquid water). There are gaps between the molecules in the crystalline structure, the volume increases and the water expands.

7 0

1 year ago

The table provided shows the properties of four elements.

Zielflug [23.3K]

By my guess, It would either be A) 1 because by research and what i’ve learned, Metal is a good conductor for Electricity and Heat. It’s also shiny and bendable, so that would be my best guess.
Hope this helped. :)

4 0

3 years ago

How many water molecules are found within the crystalline structure of one hydrate molecule?

den301095 [7]

a. The Mass of water driven off = 0.15 g

b. Moles of anhydrate = 0.00257 moles

c. Moles of water driven off is 0.00833 moles

d. There are 3 moles of water within the crystalline structure of one molecule of the hydrated salt.

e. The molecular formula of the hydrated salt will be X.3H₂O

<h3>What is the mass of water driven off from the hydrated salt?</h3>

a. The mass of water driven off from the hydrated salt is:

Mass of water driven off = 0.5 g - 0.35 g

Mass of water driven off = 0.15 g

b. Molecular mass of salt = 136 g/mol

moles of anhydrate = 0.35/136

Moles of anhydrate = 0.00257 moles

c. Moles of water driven off = mass/molar mass

molar mass of water = 18 g/mol

Moles of water driven off = 0.15/18

Moles of water driven off = 0.00833 moles

d. Moles of water within the crystalline structure of one molecule of the hydrated salt is determined by converting to whole number mole ratio by dividing with the smallest ratio,

Salt to water ratio = 0.00257 /0.00257 : 0.00833/0.00257

Salt to water ratio = 1 : 3

Therefore, there are 3 moles of water within the crystalline structure of one molecule of the hydrated salt.

e. Assuming the anhydrous salt is X, the molecular formula of the hydrated salt will be X.3H₂O

Learn more about hydrated salts at: brainly.com/question/14447094

#SPJ1

4 0

2 years ago

Receiving an electrical shock when you forget to turn off the power before working on an electrical socket is an example of a ne

raketka [301]

Answer:

TRUE

Explanation

<u>Negative punishment's or reinforcement .</u>

Negative reinforcement comes as a result of failing to take the necessary precautional measures , whether intentional or unintentional .

Forgetting is a natural circumstance hence if one forgets it means in the first place he has by passed the protocols anyway and he has to take the consequences .

Sometimes it may be ignorance since it is in common knowledge to turn off any machine and if possible you should unplug it from the power supply to avoid any shocks which may even be fatal if the source of power does not have mechanisms to control such situations i.e. shocks and power surges .

Psychological when one gets such a punishments he will always remember the ordeal since it inflicted pain on him and he will always take precautional measures before handling an electronic or power sources .

8 0

2 years ago

What is calorimetry​

What is calorimetry