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GREYUIT [131]
2 years ago
13

Identify the following as an example of a physical property or a chemical property. A bar of lead is more easily bent (malleable

) than a bar of aluminum of the same size.
Chemistry
2 answers:
Nastasia [14]2 years ago
7 0
This is a physical property, because chemical properties change the composition of the substances but in this case that doesn't happen. It only changes the shape of the lead.
weqwewe [10]2 years ago
5 0

Explanation:

Physical property is the property which can be measured.

For example, density, weight, mass, malleability, ductility etc are all physical properties.

Whereas a property that brings chemical changes in a substance is known as chemical property.

For example, reactivity, toxicity etc are all chemical properties.

Hence, when a bar of lead is more easily bent (malleable) than a bar of aluminum of the same size then it depicts physical property as no new bonds have been formed.

Thus, we can conclude that given example is an example of physical property.

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What is the molality of a solution if 100.0 g of glucose (C&Hi20e) were dissolved into 750. mL of water?
hodyreva [135]

<u>Answer:</u> The molality of solution is 0.740 m.

<u>Explanation:</u>

To calculate the mass of solvent (water), we use the equation:

Density=\frac{Mass}{Volume}

Volume of water = 750 mL

Density of water = 1 g/mL

Putting values in above equation, we get:

1g/mL=\frac{\text{Mass of water}}{750mL}\\\\\text{Mass of water}=750g

To calculate the molality of solution, we use the equation:

Molarity=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ in grams}}

Where,

m_{solute} = Given mass of solute (C_6H_{12}O_6) = 100.0 g

M_{solute} = Molar mass of solute (C_6H_{12}O_6) = 180 g/mol

W_{solvent} = Mass of solvent (water) = 750 g

Putting values in above equation, we get:

\text{Molality of }C_6H_{12}O_6=\frac{100\times 1000}{180\times 750}\\\\\text{Molality of }C_6H_{12}O_6=0.740m

Hence, the molality of solution is 0.740 m.

6 0
3 years ago
Describe a method to calculate the average atomic mass of the sample in the previous question using only the atomic masses of li
alexira [117]

Answer:

Explanation:

To calculate their average atomic masses which is otherwise known as the relative atomic mass, we simply multiply the given abundances of the atoms and the given atomic masses.

The abundace is the proportion or percentage or fraction by which each of the isotopes of an element occurs in nature.

This can be expressed below:

        RAM = Σmₙαₙ

where mₙ is the mass of isotope n

           αₙ is the abundance of isotope n

for this problem:

RAM of Li = m₆α₆ + m₇α₇

       m₆ is mass of isotope Li-6

        α₆ is the abundance of isotope Li-6

       m₇ is mass of isotope Li-7

        α₇ is the abundance of isotope Li-7

3 0
3 years ago
What kind of elements are on the left side of the zig-zag line on the periodic table?
Ber [7]

Metals are to the left of the zig-zag, nonmetals are to the right, and metalloids lie on/beside the line.

3 0
3 years ago
Heroin was originally going to be called "wunderlich", a German word for wonderful, since one chemist thought the substance made
Zarrin [17]

Answer:

heroic

Explanation:

Bayer, a German pharmaceutical company, named the substance it synthesized "heroin", probably from the word heroisch, German for heroic, because in field studies people using the medicine felt "heroic".

BTW, I found this information on this wedsite: https://www.answers.com/Q/Where_did_heroin_get_its_name

Also, if you want some more history about this drug, you can visit this article: https://www.narconon.org/drug-information/heroin-history.html

5 0
3 years ago
Simply parmanent tissue bibliography please help it's for my project ​
daser333 [38]

Answer:

Do your project by yourself

6 0
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