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eimsori [14]
4 years ago
8

When placed in a 200-mL square box, a substance has a spherical shape and has a volume of 75

Chemistry
2 answers:
SpyIntel [72]4 years ago
6 0

Answer:

Solid  

Explanation:

A solid maintains a constant shape  and a constant volume.

B is wrong, because a liquid maintains its volume but assumes the shape of the container.

C is wrong, because a gas maintains neither a constant shape nor a constant volume.

Liono4ka [1.6K]4 years ago
6 0

Answer:

solid

Explanation:

First let's look at the difference between the states of matter

Most solids maintain their shape regardless of where they are contained

Liquids and gases take the form of the container that contains them

In addition the gases expand their volume and tend to occupy the entire surface where they are contained

For example, if we have a certain volume of water in a square container, the water will have this shape

If we take the same volume and place it in a spherical container it will stop being square and will adapt to the spherical shape

At the beginning it is placed in a square box and they tell us that it maintains its spherical shape then it is contained in a spherical container and maintains its shape and volume

It maintains its shape and volume regardless of the container that contains it, therefore it is in a solid state

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Answer: nothing. It remains undissolved

Explanation: saturated = dissolved as much solute as solvent can contain

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3 years ago
Which of the following statements about chemical and physical properties is false?
Ber [7]

Answer:

The odor of a substance is a physical property. That would be your answer.

Explanation:

Physical Properties

Physical properties are properties that can be measured or observed without changing the chemical nature of the substance. Some examples of physical properties are:

color (intensive)

density (intensive)

volume (extensive)

mass (extensive)

boiling point (intensive): the temperature at which a substance boils

melting point (intensive): the temperature at which a substance melts

Chemical Properties

Remember, the definition of a chemical property is that measuring that property must lead to a change in the substance’s chemical structure. Here are several examples of chemical properties:

Heat of combustion is the energy released when a compound undergoes complete combustion (burning) with oxygen. The symbol for the heat of combustion is ΔHc.

Chemical stability refers to whether a compound will react with water or air (chemically stable substances will not react). Hydrolysis and oxidation are two such reactions and are both chemical changes.

Flammability refers to whether a compound will burn when exposed to flame. Again, burning is a chemical reaction—commonly a high-temperature reaction in the presence of oxygen.

The preferred oxidation state is the lowest-energy oxidation state that a metal will undergo reactions in order to achieve (if another element is present to accept or donate electrons).

4 0
3 years ago
The eu(iii) standards added to the groundwater sample contained 0.168 ng/ml (ppb) of eu(iii). calculate the concentration of eu(
Andre45 [30]
The standard addition equation is as followsI_(S+X) (V/V_O )=I_X+I_X/[X]_i  [S]_4 (V_S/V_0 ) Here, [X]_i is the initial concentration of analyte, [S]_i is the initial concentration of standard, I_X is signal for analyte, I_(S+X) is signal for standard and analyte, V_0 is the initial volume, V_S is the added standard volume, and V is the total volume.Added volume of standard V_S is-23.3 mL. Initial volume of the sample V_0  is 10.00 mL. Initial concentration of standard ([S]_i) is 0.156 ng/mL.[X]_i= -[S]_i (V_S/V_0 )〖[X]〗_(i )= -(0.156 ng/mL)((-23.3 mL)/(10.00 mL))=0.363 ng/mL
Concentration of U(III) in ground sample is 0.363 ng/mL

6 0
3 years ago
How much energy is required to melt a 500. gram block of iron? The heat of vaporization is 6090 J/g and the heat of fusion is 24
ki77a [65]

Answer:

Heat required = 1.23×10⁵J

Explanation:

Given:

Mass (m) = 500 gram

Specific heat = 6,090 J/g

heat of fusion = 247 J/g.

Find:

Heat required

Computation:

Heat required = 247 J/g× 500 g

Heat required = 1.23×10⁵J

4 0
4 years ago
If the acetylene tank contains 37.0 mol of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for t
bekas [8.4K]

Answer: O_2 is considered as the limiting reagent for this reaction.

Explanation:

Limiting reagent is the reagent which limits the formation of the product.

Excess reagent is the reagent which is present in excess in a chemical reaction.

For the combustion of acetylene, the reaction follows:

2C_2H_2(g)+5O_2(g)\rightarrow 4CO_2+2H_2O

By Stoichiometry,

5 moles of oxygen gas reacts with 2 moles of acetylene.

So, 81 moles of oxygen gas will react with = \frac{2}{5}\times 81 = 32.4 moles of acetylene.

As, the required amount of acetylene is less than the given amount. So, it is considered as an excess reagent and oxygen gas is the limiting reagent.

8 0
4 years ago
Read 2 more answers
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