China's net exports are represented by a positive integer. Explain what this tells you about imports and exports of China.
A.China's exports exceed imports by 120 billion c.
B.China's total exports are 120 billion dollars.
C. China's total imports are 120 billion dollars.
D. China's imports exceed exports by 120 billion dollars.
Please select the best answer from the choices provided.
A. A
B. B
C. C
D. D​

Answer:

true :PP

Explanation:

Answer:

47 is your correct ans, which is b

Answer:

[PH₃(g)] = 0.0432M at equilibrium

Explanation:

Given:       PH₃BCl₃(s) => PH₃(g) + PH₃(g); Kc = 1.87 x 10⁻³

*Let solids have concentration value = 1.0M and apply common ion (compound) effect to Ci b/c of 0.070g BCl₃ added initially.

        PH₃BCl₃(s)  =>         BCl₃(g)              +            PH₃(g

Ci:        5.00g                    0.07g                            0.00g    

         *≅1.0M(s)           =0.07g/115.81g·mol⁻¹

                                   = 6 x 10⁻⁶ mol

                                   = 6 x 10⁻⁶mol/4.5L

                                   = 1.3 x 10⁻⁴M                    = 0.00M

ΔC:       -x                            +x                                 +x

Ceq:    1M - x ≅ 1M      = (1.3 x 10⁻⁴ + x)M               = x

Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + x)(x) = 1.87 x 10⁻³

=> 1.3 x 10⁻⁴·x + x² = 1.87 x 10⁻³

=> x² + 1.3 x 10⁻⁴·x  + 1.87 x 10⁻³ = 0

=> x = -b ± [Sqrt(b² - 4ac)] / 2a

=> x = -1.3 x 10⁻⁴ ± Sqrt[(1.3 x 10² - 4(1)(1.87 x 10⁻³)] / 2(1)

=> x = 0.0432M in PH₃ at equilibrium

Check:  

Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + 0.0432)(0.0432) = 1.87 x 10⁻³ (QED)                            

Answer:

It is like about a attraction between atoms, molecules, and more.

When light passes from one medium to the other of different density, the light ray will bend. This is called refraction. Light moving from air to water cause refraction. Hence, option d is correct.

Refraction is a phenomenon in which a light ray bent in its direction when passing from one medium to the other where the mediums have different densities.

The measure of bending of light in a medium is called refractive index of that medium. It depends on the density as well as velocity of light through the medium.

For example, when light passes from air to water or air to glass it bends. We can clearly observe the bending in the light ray at the boundary of the two mediums. Hence, option D is correct.

Find more on refraction:

https://brainly.com/question/29692290

#SPJ6.

The options of your question were as follows:

A.  traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water.

Answer:

A number of organisms in a specific area/place

Explanation:

Answer:

0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.

Explanation:

The balanced reaction between tha surfuric acid and iron (III) hydroxide is:

Fe(OH)₃ + 3 H₂SO₄ → Fe(HSO₄)₃ + 3 H₂O

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactants and products participate in the reaction:

Being molarity (M) the number of moles of solute that are dissolved in a given volume:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

then the number of moles can be calculated as:

number of moles= molarity* volume

So, if 58.42 mL ( 0.05842 L) of 0.09756 M iron (III) hydroxide react, then it means that the number of moles that react are:

number of moles= 0.09756 M* 0.05842 L

number of moles= 0.005699 moles

Now it is possible to apply the following rule of three: if by stoichiometry 1 mole of Fe(OH) ₃ reacts with 3 moles of H₂SO₄, then 0.005699 moles of Fe(OH) ₃ with how many moles of H₂SO₄ does it react?

[tex]moles of H_{2} SO_{4} =\frac{0.005699 moles ofFe(OH)_{3}* 3moles of H_{2} SO_{4} }{1mole ofFe(OH)_{3}}[/tex]

moles of H₂SO₄= 0.017097

Being sulfuric acid 0.2860 M, it is replaced in the definition of molarity:

[tex]0.2860M=\frac{0.017097 moles}{volume}[/tex]

Solving for the volume:

[tex]volume=\frac{0.017097 moles}{0.2860 M}[/tex]

volume= 0.05978 mL

0.05978 mL of 0.2860 M sulfuric acid is required to react with 58.42 mL of 0.09756 M iron (III) hydroxide.

Answer:

When white glue is in the bottle, there's not enough air inside the bottle to cause the water to evaporate to make the glue sticky. Basically, the bottle holds the glue from the air and keeps the glue from going everywhere.

Answer:

B

Explanation:

Answer:

The law of conversion of mass is a scientific law that says that mass or matter can not be created or destroyed like energy but changes its form in a different type of state. So, by the law of conversion of mass, you can say that mass is not disappeared but change in different forms of states of matter like gas, soot, or melted residues of candle and ash of thread.

Due to this, the mass of the solid or waxy state due to burning changes to gas released by burning and residue of wax that will be equal to the mass of the original mass.

Answer:

The balanced reactions are:

C₂ + 2B → B₂C₂

Ag₄ + 2SO₂ → 4AgO + S₂

Explanation:

The Law of Conservation of Matter postulates that "the mass is not created or destroyed, only transformed." This means that the reagents interact with each other and form new products with physical and chemical properties different from those of the reagents because the atoms of the substances are ordered differently. But the amount of matter or mass before and after a transformation (chemical reaction) is always the same, that is, the quantities of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends. In other words, then the mass before the chemical reaction is equal to the mass after the reaction.

In other words, the law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.

Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts .

The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.

By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.  

You have:

C₂ + B → B₂C₂

Left side: 2 C and 1 B.

Right side: 2 C and 2 B.

Carbon C is balanced since you have the same amount of the element on each side of the reaction, but boron B is not balanced. So, balancing the reaction:

C₂ + 2B → B₂C₂

Left side: 2 C and 2 B.

Right side: 2 C and 2 B.

Now you have the same amount of each element on each side of the reaction, so the reaction is balanced.

Now you have:

Ag₄ + SO₂ → AgO + S₂

Left side: 4 Ag, 1 S and 2 O.

Right side: 1 Ag, 2 S and 1 O.

Balancing the Ag:

Ag₄ + SO₂ → 4AgO + S₂

Left side: 4 Ag, 1 S and 2 O.

Right side: 4 Ag, 2 S and 4 O.

Balancing the O:

Ag₄ + 2SO₂ → 4AgO + S₂

Left side: 4 Ag, 2 S and 4 O.

Right side: 4 Ag, 2 S and 4 O.

You have the same amount of each element on each side of the reaction, so the reaction is balanced.

Answer:

Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough, that they change form. This energy is usually heat or thermal energy.

Explanation:

Answer:

butane

Explanation:

I hope this helps!

Answer:

Butane

...............

Answer:

b

Explanation:

Answer: 3 4 a noodles

Explanation: just is[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt{x} x^{2} x^{2}[/tex]

Answer:

PET polymer or Polyethylene terephthalate is also known as Terylene. In the PET polymer, the ester linkage between the monomers is formed by the reaction of the OH group of ethylene diol (glycol) and the CO2H group of terephthalic acid.

In the family of polyester, PET is considered as the mostly used thermoplastic polymer resin.

It is used widely in clothing fibers, as liquid and food containers, and as a substance for engineering resins. In the United Kingdom it is known as terelyne, in the United States as Dacron, and in Russia as Lavsan.

Answer:

the volume of the gas will be 1/8 of the original value

Explanation:

Answer:

5.85 x 10⁻² mol Au

Explanation:

Divide the atoms of gold with Avogadro's number to find the solution.

Answer:

2

Explanation:

 2 lone pairs on the central atom of BrF3.

A. They have performed an experiment once and reported their findings.

Answer:

b

Explanation:

Answer:

V = 146.87 L

Explanation:

Given data:

Mass of sample = 14.0 g

Pressure of sample = 120 kpa

Volume of gas = ?

Temperature of gas = 30°C

Solution:

Number of moles of gas:

Number of moles = mass/molar mass

Number of moles = 14.0 g/ 2 g/mol

Number of moles = 7 mol

Pressure of gas:

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 8.31 KPa.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

30+273 = 303 K

by putting values,

120 KPa × V = 7 mol × 8.31 KPa.L/ mol.K  × 303 K

V = 17625.51 KPa .L/ 120 KPa

V = 146.87 L

Explanation:

The elements Fluorine (F),Chlorine (Cl) and Iodine (I) are all part of the same Group ( i.e, Group 17 ) on the periodic table.

Answer:

Group

Explanation:

Answer:

D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.

Explanation:

Option D is the correct statement. From the excerpt, it can be seen that container B is being heated. The heat that is applied to container B will make the temperature of the gas to increase, thereby increasing the average kinetic energy. This will cause the gas molecules to mover faster and with force hitting the walls of the gas container. At this time, pressure should increase. Also, the volume of the gas increases just as the temperature of the gas also increases.

Answer:

D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.

Explanation: