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2 years ago

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A salt is an ionic compound containing cations other than hydrogen and anions other than the hydroxylion. in writing the formula

for a salt, the symbol of the cation is listed first, and the symbol for the anion is listed second. which one of these is a salt?

1 answer:

Blizzard [7]2 years ago

8 0

In writing the formula for a salt the symbol of the cation is first then the anion is written second .

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Lividity in a dead body is caused by capillaries decaying due to de-oxygenation.

sineoko [7]

Livor mortis refers to the bluish-purple discoloration (lividity) under the skin of the lower body parts due to gravitation of blood after death. ... Dark pinpoint spots (Tardieu spots) are seen when capillaries rupture due to increased gravitational pressure (e.g. in the legs of a hanged person)

5 0

2 years ago

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How many grams of C12 can be prepared from the reaction of 16.0 g of MnO2 and 30.0 g of HCl according to the following chemical

kogti [31]

Answer:

Mass of Cl₂ produced 12.78 g

Explanation:

Given data:

Mass of MnO₂ = 16 g

Mass of HCl = 30.0 g

Mass of Cl₂ produced = ?

Solution:

Chemical equation:

MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O

Number of moles of MnO₂:

Number of moles = mass / molar mass

Number of moles = 16 g/ 87 g/mol

Number of moles = 0.18 mol

Number of moles of HCl:

Number of moles = mass / molar mass

Number of moles = 30 g/ 36.46 g/mol

Number of moles = 0.82 mol

Now we will compare the moles of Cl₂ with MnO₂ and HCl.

MnO₂ : Cl₂

1 : 1

0.18 : 0.18

HCl : Cl₂

4 : 1

0.82 : 1/4×0.82 = 0.205 mol

The number of moles of Cl₂ formed by HCl are less it will limiting reactant.

Mass of Cl₂ formed:

Mass = number of moles × molar mass

Mass = 0.18 mol × 71 g/mol

Mass = 12.78 g

8 0

2 years ago

How quickly must non-frozen ready-to-eat foods be consumed?

Alexxandr [17]

Answer:

i believe 24 hours

Explanation:

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2 years ago

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Draw the structure of the major organic product isolated from the reaction of 3-hexyne with hydrogen (1 mol), Lindlar palladium.

ohaa [14]

Answer:

See explanation and image attached

Explanation:

When 1 mole of hydrogen is added to 3-hexyne, the addition occurs on the same face or side of the triple bond to yield cis-2-hexene in the presence of lindlar catalyst which prevents further hydrogenation. This is known as syn addition.

The syn addition is achieved because the hydrogen molecule is first adsorbed on the surface of the palladium metal and is subsequently attached to the same face of the triple bond in 3-hexyne as shown in the image attached to this answer.

6 0

2 years ago

Which of the following statements describe chemical properties?

Y_Kistochka [10]

Answer:

<em><u>A. Oxygen gas supports combustion.</u></em>

<em><u>B. Hydrofluoric acid reacts with glass.</u></em>

<em><u>C. Fertilizers help to increase agricultural production. </u></em>

Explanation:

<em>Chemical properties</em> can only be observed when a chemical change, i.e. a change in the chemical composition, occurs.

On the other hand, physical properties are observed or measured without altering the composition of the substances.

Typical examples of chemical properties are reactivity, flammability, combustion, oxidation states, acidity, among others that require to carry out a chemical reaction to be observed.

Typical examples of physical properties are freezing point, melting point, boiling point, density, solubility, corrosiveness, among others.

Thus, as for the choices you have:

<em><u>A. Oxygen gas supports combustion:</u></em> the only way to observe this property is by carrying out a combustion reaction, so this describes a chemical property.

<u><em>B. Hydrofluoric acid reacts with glass:</em></u> again, only by letting hydrofluoric acid react with glass this can be observed, so this is another example of a chemical property.

<u><em>C. Fertilizers help to increase agricultural production:</em></u> fertilizers are absorbed by the plants and converted by biochemical reactions, so this also describes a chemical property.

<em><u>D. Water boils below 100°C on top of a mountain:</u></em> boiling is a change of state, the water is H₂O and continues having the same composition after boiling, so this describes a physical property.

<em><u>E. Lead is denser than aluminum: </u></em>density is measured by physical media, measuring mass and volume; so this is a physical property.

4 0

2 years ago