FILL IN THE BLANKS (IMAGES ATTACHED)

Answer:

liquid

a semi permeable membrane

oxygen

Explanation:

plz give me brainiest

Answer:

c or d

Explanation:

i tried a and it was wrong. its not B. and i cant see the rest. its the one that looks like a catipillar tho

Answer:

Its not A or B

Explanation:

Answer:

When the molecular composition changes.

Explanation:

A physical change is a change in size or appearance that can usually be reversed; a chemical change cannot be reversed easily and changes the atomic composition of something.

Answer:

CO + 2NaOH(aq) ---------- Na2CO3 + H2O

When carbon dioxide is dissolved in an aqueous solution of sodium hydroxide, the mixture reacts to yield aqueous sodium carbonate and liquid water. The net ionic equation is CO + [tex]2OH^{-}[/tex] → [tex]CO^{2-} _{3}[/tex]

The molecular formula for a process known as the net ionic equation only includes the species which are really involved in the reaction. In double displacement reactions, and redox reactions, including acid-base neutralization processes, the net ionic equation would be frequently employed.

When carbon dioxide is dissolved in an aqueous solution of sodium hydroxide, the mixture reacts to yield aqueous sodium carbonate and liquid water.

CO + 2NaOH → [tex]Na_{2} CO_{3} + H_{2}O[/tex]

The ionic equation can be written as:

CO + [tex]2Na^{+} + 2OH^{-}[/tex] → [tex]2Na^{+} + CO^{2-} _{3}[/tex]

Hence, the net ionic equation is CO + [tex]2OH^{-}[/tex] → [tex]CO^{2-} _{3}[/tex]

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666

Explanation:

nhgytfghgtfgv

The final temperature = 36 °C

The balanced combustion reaction for C₆H₆

2C₆H₆(l)+15O₂(g)⇒ 12CO₂(g)+6H₂O(l)  +6542 kJ

MW C₆H₆ : 78.11 g/mol

mol C₆H₆ :

[tex]\tt \dfrac{8.5}{78.11}=0.109[/tex]

Heat released for 2 mol C₆H₆ =6542 kJ, so for 1 mol

[tex]\tt \dfrac{0.109}{2}\times 6542=356.539~kJ/mol[/tex]

Heat transferred to water :

Q=m.c.ΔT

[tex]\tt 356.539=5.691~kg\times 4.18~kj/kg^oC\times (t_2-21)\\\\t_2-21=15\rightarrow t_2=36^oC[/tex]

Answer:

[tex]pH=2.3[/tex]

Explanation:

Hello!

In this case, since pyridinium chloride has a pKb of 8.77 which is a Kb of 1.70x10⁻⁹ and therefore a Ka of 5.89x10⁻⁵ which means it tends to be acidic, we write its ionization via:

[tex]C_5H_5NHCl(aq)+H_2O(l)\rightleftharpoons C_5H_5NCl^-(aq)+H_3O^+(aq)[/tex]

Because it is a Bronsted base which donates one hydrogen ion to the water to produce hydronium. Thus, we write the equilibrium expression with the aqueous species only:

[tex]Ka=\frac{[C_5H_5NCl^-][H_3O^+]}{[C_5H_5NHCl]}[/tex]

In terms of the reaction extent [tex]x[/tex], we write:

[tex]5.89x10^{-5}=\frac{x*x}{0.39-x}[/tex]

Thus, solving for [tex]x[/tex] we obtain:

[tex]x_1=-0.0048M\\\\x_2=0.0048M[/tex]

Clearly the solution is 0.0048 M because to negative values are not allowed, therefore, since it equals the concentration of hydronium which defines the pH, we write:

[tex]pH=-log([H_3O^+])=-log(0.0048)\\\\pH=2.3[/tex]

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Answer: Collision theory explains why different reactions occur at different rates, and suggests ways to change the rate of a reaction. Collision theory states that for a chemical reaction to occur, the reacting particles must collide with one another. The rate of the reaction depends on the frequency of collisions. The theory also tells us that reacting particles often collide without reacting. For collisions to be successful, reacting particles must (1) collide with (2) sufficient energy, and (3) with the proper orientation.

Molecules must collide before they can react

This rule is fundamental to any analysis of an ordinary reaction mechanism. It explains why termolecular processes are so uncommon. The kinetic theory of gases states that for every 1000 binary collisions, there will be only one event in which three molecules simultaneously come together. Four-way collisions are so improbable that this process has never been demonstrated in an elementary reaction.

Explanation:hope this helped

If two reactant molecules collide but do not have the right alignment then formation of product does not takes place.

Collision theory states that if reacting particles frequently collide without reacting. Reacting particles must collide with sufficient energy and the right orientation for collisions to be successful.

So it the two reactant molecules collide with each other without proper orientation then it will not convert into products.

Hence formation of product will not takes place if reactant does not collide with right allignment.

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Answer:

17.7

hope this helps

have a good day :)

Explanation:

17.7 g of potassium sulfite ([tex]K_2SO_3[/tex]) are required to dissolve in 872 g of water to make a 0.128M solution.

It is a measure of the concentration of a solute in a solution in terms of the amount of substance in a specified amount of mass of the solvent

You're looking for the mass of potassium sulfite, [tex]K_2SO_3[/tex], needed to make a 0.128 m, or 0.128 molal, solution.

Now, molality is used to express the concentration of a solution in terms of how many moles of solute it contains per kilogram of solvent.

This means that in order to find a solution's molality, you need to know

the number of moles of solute and the mass of the solvent expressed in kilograms.

In your case, you already know the mass of the solvent in grams, so the very first thing to do here is to convert it to kilograms.

872 g = 0. 872 Kg.

Now, a 0.128 m solution contains 0.128 moles of solute per kilogram of solvent. Since your sample contains 0.872 kg of solvent, it follows that it will contain 0.1116 moles [tex]K_2SO_3[/tex].

All you have to do now is use the molar mass of potassium sulfite to figure out how many grams would contain that many moles:

0.1116 moles x 158.26 g =17.7 g

Hence, 17.7 g of potassium sulfite ([tex]K_2SO_3[/tex]) are required to dissolve in 872 g of water to make a 0.128M solution.

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Answer:

proton 5

Explanation:

I think it is fluorine

Answer:

Metals shows the property of malleability while non-metals are non-malleable. Metals are generally those substances that have a shiny surface and thus are lustrous. Whereas non-metals have non-shiny appearance and thus falls under the category of non-lustrous substances.

Explanation:

hope the answer was helpful

Answer:nonmetal

Explanation: gggg

Answer:

a. A color change

c. Precipitate being formed

e. A change in temperature

f. Bubbles being produced

Explanation:

Two types of changes occur namely: physical changes and chemical changes. A physical change does not affect the chemical composition of the substance involved. Physical changes include change of state etc.

However, on the other hand, a chemical change alters the chemical composition of the substances involved, hence, leading to the formation of new product(s). It is also called a chemical reaction. Since a new product is formed from the alteration of the chemical nature of the reacting substances, the following changes or indicators will be present or evident in a chemical reaction:

- color change of substance

- Precipitate being formed i.e. solid deposit

- A change in temperature

- Bubbles being produced (evolution of gas)

Answer:

No. Moles  = 2.142   mole

Answer:

A: 2

Explanation:

Level one has one sublevel, whereas a Level two has two sublevels.

The molecule is the representative particle of molecular compounds. It is also the representative particle of diatomic elements.

Answer:

m

Explanation:

Answer:

Tenacity describes the reaction of a mineral to stress such as crushing, bending, breaking, or tearing. ... The majority of all minerals are brittle. An example is Quartz. (Minerals that are not brittle may be referred to as Nonbrittle minerals.)

umm explanation pls so i answee

Answer:

Lithium 7

Explanation:

An isotope is based off the number of neutrons present 3+4=7

Look on the periodic table to find the element number

Answer:

0.4941, 0.5059

Explanation:

[tex]P_N[/tex] = Partial pressure of nitrogen = 417 mm Hg

[tex]P_{Xe}[/tex] = Partial pressure of xenon = 427 mm Hg

Total pressure in the system is given by

[tex]P=P_N+P_{Xe}\\\Rightarrow P=417+427=844\ \text{mm Hg}[/tex]

Mole fraction is given by

[tex]X_N=\dfrac{P_N}{P}\\\Rightarrow X_N=\dfrac{417}{844}\\\Rightarrow X_{N}=0.4941[/tex]

For xenon

[tex]X_{Xe}=1-0.4941=0.5059[/tex]

or

[tex]X_{Xe}=\dfrac{P_{Xe}}{P}\\\Rightarrow X_{Xe}=\dfrac{427}{844}\\\Rightarrow X_{Xe}=0.5059[/tex]

So, mole fraction of nitrogen is 0.4941 and xenon is 0.5059.

Answer:

A is the only neutral atom there.

Explanation:

It consists of 6 atoms 6 neutrons and 6 electrons which means it is neutral. I am currently in chemistry.

Answer:

7 valence e-, obtain e-, negative

Answer:

1.9998 atm

Explanation:

Balance the equation and then use PV=nRT to find the variable.

The final pressure of the chamber is 2 atm.

The given parameters;

The balanced chemical reaction of the given elements;

[tex]O_2 \ \ + \ 2H_2 \ \ ---> \ 2H_2O[/tex]

Initial number of moles of the gases, = 1 + 2 = 3 moles

Final number of moles of the product, = 2  moles

The final pressure of the chamber is calculated as follows;

[tex]PV = nRT\\\\\frac{P}{n} = \frac{RT}{V} \\\\\frac{P_1}{n_1} = \frac{P_2}{n_2} \\\\P_2 = \frac{P_1 n_2}{n_1} \\\\P_2 = \frac{3 \times 2}{3} \\\\P_2 = 2 \ atm[/tex]

Thus, the final pressure of the chamber is 2 atm.

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Answer:

Trioxocarbonate (iv) are salts derived from trioxocarbonate (iv) acid when it reacts with metals and metallic oxides. All trioxocarbonate (iv) salts of Sodium (Na), Potassium (K) and Ammonium(NH4+) are soluble while all others are insoluble.

Answer:

Ionization Energy increases from left to right on the periodic table. Atomic radius decreases moving left to right on the periodic table.

Atomic size gradually decreases from left to right across a period of elements. This is because, within a period or family of elements, all electrons are added to the same shell.

Answer:

8.3

Explanation:

pH is the measure of the H+ or H30 (they r the same thing) ions in a solution. it is equal to -log[H+]. [H+]=  Molar concentration of H+ ions.

Answer:

[tex]T_f=26.7\°C[/tex]

Explanation:

Hello.

In this case, when two substances at different temperature are placed in contact in an isolated container, we can say that the heat lost by the hot substance is gained by the cold substance. In such a way, since granite is at 76.0 °C and water at 22.0 °C we infer granite is hot and water is cold, so we write:

[tex]Q_{granite}=-Q_{water}[/tex]

In terms of mass, specific heat and change in temperature, we write:

[tex]m_{granite}C_{granite}(T_f-T_{granite})=-m_{water}C_{water}(T_f-T_{water})[/tex]

Thus, since the temperature is the same for both substance, we can solve for it as shown below:

[tex]T_f=\frac{m_{granite}C_{granite}T_{granite}+m_{water}C_{water}T_{water}}{m_{granite}C_{granite}+m_{water}C_{water}}[/tex]

By plugging in each variable, we obtain:

[tex]T_f=\frac{11.1g*0.790\frac{J}{g\°C} *76.0\°C+22.0g*4.18\frac{J}{g\°C} *22.0\°C}{11.1g*0.790\frac{J}{g\°C} +22.0g*4.18\frac{J}{g\°C}}\\\\T_f=26.7\°C[/tex]

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