In a chemical reaction, ____ interact to form ___

1. Be able to convert atm’s to kPa’s. (how?)

Whitepunk [10]

1.) 0.875atm x 760.0 mmHg/atm
2.)    8I
        7I                                        0
        6I                        0
        5I                  0
        4I                                0
        3I                            0
        2I--------- 000000000 0I
        1I-0------------------------ I---------------
         0             50             100           150
                      Boiling point(degrees Celsius)
3.) The warmer the molecules are the faster they move like boiling water the gases are coming out of the water
4.)no clue
5.) A {solution} is always transparent, light passes through with no scattering from solute particles which are the molecule in size. The solution is homogeneous and does not settle out. A solution cannot be filtered but can be separated using the process of distillation.

A {suspension} is cloudy and heterogeneous. The particles are larger than 10,000 Angstroms which allows them to be filtered. If a suspension is allowed to stand the particles will separate out.

A {colloid} is intermediate between a solution and a suspension. While a suspension will separate out a colloid will not. Colloids can be distinguished from solutions using the Tyndall effect. Light passing through a colloidal dispersion, such as smoky or foggy air, will be reflected by the larger particles and the light beam will be visible. A hydrocolloid can simply be defined as a substance that forms a gel when it comes in contact with water. Such substances include both polysaccharides and proteins.
6.)The random movement of microscopic particles suspended in a liquid or gas, caused by collisions with molecules of the surrounding medium. Also called Brownian motion, molecular movement, pedesis.
hope that helps please mark me as brainly

5 0

4 years ago

Some hypothetical alloy is composed of 12. 5 wt% of metal a and 87. 5 wt% of metal b. If the densities of metals a and b are 4.

gavmur [86]

Answer:

The number of

atoms in the unit cell is 2

Explanation:

7 0

2 years ago

Hydrocarbons, compounds containing only carbon and hydrogen, are important in fuels. The heat of combustion of cyclobutane, C4H8

Gennadij [26K]

Answer:

1. C4H8 + 6O2 -----> 4CO2 + 4H20

2. 3836.77 kcal

Explanation:

1. Balanced equation for the complete combustion of cyclobutane:

C4H8 + 6O2 -----> 4CO2 + 4H20

2. Heat of combustion of cyclobutane = 650.3 kcal/mol

Molecular weight of cyclobutane, C4H8 = 56.1 g/mol

Mole of C4H8 : mass of cyclobutane/Molecular weight of cyclobutane

Mole of C4H8 = 331/56.1 = 5.9 mol

Energy released during combustion = 5.9 mol × 650.3 kcal/mol = 3836.77kcal

Therefore the energythat is released during the complete combustion of 331 grams of cyclobutane is 3836.77kcal

8 0

3 years ago

Why does magnesium oxide have a high melting point?

Mandarinka [93]

Magnesium oxide is an ionic compound ( because it consists of a metal and a non-metal)

In ionic compounds, electrons from the outer shell exchange between the atoms so that they each get a full outer shell. Once these electrons are exchange, the atoms will become ions. One ion will have a positive charge, and the other ion will have a negative charge. The positive and negative ions then bond strongly together in a lattice structure, due to the electrostatic forces of attraction.

These electrostatic forces of attraction are very strong and require a lot of energy to break, as such the compound will have a high melting point.

__________________________________________

Now lets look at the ionic bonding between magnesium and oxygen:

In the outer shell of Magnesium, there are 2 electrons.

In the outer shell Oxygen, there are 6 electrons.

Magnesium gives it's two electrons to Oxygen, so that the Oxygen now has a full outer shell of 8 electrons. However, since Oxygen gained two electrons, it will form a negatively charged ion with a charge of -2.

Since Magnesium lost the two electrons, it's second shell (which has 8 eletrons) now becomes the outer shell. So Magnesium also now has a full outer shell. But since it has lost two electrons, it becomes a positively charged ion with a charge of + 2.

The positive Magnesium ion and negative Oxygen ion and now strongly attracted to each other, and form a strong ionic compound (magnesium oxide) with a lattice structure.

The electrostatic forces of attraction between the positive Magnesium and negative Oxygen are so strong that a lot of heat and energy are needed to break them.

Therefore magnesium oxide has a high melting point.

5 0

3 years ago

Which diagram correctly depicts the trend in electronegativity? a. b. c. d.

lisabon 2012 [21]

Answer:

b it increases from left to right of the group and it decreases down the period.

3 0

3 years ago

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In a chemical reaction, ____ interact to form ____. select one:

In a chemical reaction, interact to form . select one: