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2 years ago

Which of the following is created when solids, liquids, or gases mix with one another? Mixture Element Compound Pure substance

Chemistry

1 answer:

Masja [62]2 years ago

8 0

Answer:

The answer is a mixture

Explanation:

Different states of matter can be mixed without making a chemical change which makes it a mixture

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LenKa [72]

Keep trying you will get if you keep trying ok

4 0

3 years ago

phosporus can be prepared from calcium phosphate by the following reaction: 2Ca3(PO4)2+6SiO2+10C → 6CaSiO3+P4+10CO Phosphorite i

morpeh [17]

Answer:

285 g of P₄

Explanation:

Let's consider the following balanced equation.

2 Ca₃(PO₄)₂ + 6 SiO₂ + 10 C → 6 CaSiO₃ + P₄ + 10 CO

We know the following relations:

100 g of phosphorite contain 75 g of Ca₃(PO₄)₂
2 moles of Ca₃(PO₄)₂ produce 1 mole of P₄
The molar mass of Ca₃(PO₄)₂ is 310 g/mol

The molar mass of P₄ is 124 g/mol

Then, for 1.9 kg of phosphorite:

$1900g(phosphorite).\frac{75gCa_{3}(PO_{4})_{2}}{100g(phosphorite)} .\frac{1molCa_{3}(PO_{4})_{2}}{310gCa_{3}(PO_{4})_{2}} .\frac{1molP_{4}}{2molCa_{3}(PO_{4})_{2}} .\frac{124gP_{4}}{1molP_{4}} =285gP_{4}$

6 0

2 years ago

In an exothermic reaction, heat is

GarryVolchara [31]

Answer:

B. the particles in the surroundings move faster and have increased entropy

Explanation:

An exothermic process releases heat, causing the temperatures of the surroundings to increase. Entropy increases as temperature increases. Since an exothermic reaction releases heat to the surroundings, molecules in the surroundings will begin to move faster because they will absorb more energy, which increases their kinetic energy. An increase in temperatures means that the particles of the surroundings have greater kinetic energy. The faster moving particals have more disorder than particles that are moving more slowly at a lower temperature. Entropy is interpreted as the degree of disorder/randomness.

8 0

3 years ago

What is an effect of electrostatic forces inside the nucleus?

Ivahew [28]

Answer: A
The protons in the nucleus repel each other

Explanation:
the number of protons inside a nucleus increases the electrostatic repulsion between protons increase reducing the binding energy. Thus the electrostatic force determines the stability of a nuclear configuration

3 0

3 years ago

Given the balanced equation representing a reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) How many moles of Al(s) react completely with 4

Paladinen [302]

We must consider the relation between Al and $O_2$ :

$\frac{3\ mol\ O_2}{4\ mol\ Al} = \frac{4,5\ mol\ O_2}{x}\ \to\ x = \frac{4,5\ mol\ O_2\cdot 4\ mol\ Al}{3\ mol\ O_2} = \bf 6\ mol\ Al$

As you can see, the number of moles of Al is double to the number of moles of $Al_2O_3$ , keeping constant the proportion of both substances.

5 0

3 years ago