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3 years ago

Which of the following statements is one of the postulates in Dalton´s theory?

Chemistry

1 answer:

MatroZZZ [7]3 years ago

4 0

Answer:

spanish conquistadors, who were primarily poor nobles from the impoverished west and south of Spain, were able to conquer the huge empires of the New World with the help of superior military technology, disease (which weakened indigenous resistance), and military tactics including surprise attacks and powerful and there were no strangers to love and they knew the rules and so did i they just wanted to tell people how the were feeling and they wanted someone to understand so they were never gonna give you up and they were never gonna let them down and they were never gonna turn around and hurt other people in the army they were never gonna make the soldiers cry and they never were going to say goodbye but the years stop comming and they dont stop comming head to the rules gotta keep the groud running but Remember those walls I built Well, baby, they're tumbling down And they didn't even put up a fight They didn't even make a sound I found a way to let you win But I never really had a doubt Standing in the light of your halo I got my angel now It's like I've been awakened Every rule I had you breaking It's the risk that I'm taking I ain't never gonna shut you out Everywhere I'm looking now I'm surrounded by your embrace BabPatrician. Patricians were considered the upper-class in early Roman society. They controlled the best land and made up the majority of the Roman senate.y, I can see your halo You know you're my saving grace You're everything I need and morei t's written all over your face Baby, I can feel your halo Pray it won't fade away Hit me like a ray of sun Burning through my darkest night You're the only one that I want Think I'm addicted to your light swore I'd never fall again But this don't even feel like falling Gravity can't forget To pull me back to the ground again PatricPatrician. Patricians were considered the upper-class in early Roman society. They controlled the best land and made up the majority of the Roman senate.ian. Patricians were considered the upper-class in early Roman society. They controlled the best land and made up the majority of the Roman senate.

Explanation:

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What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL, should be used to make 5

charle [14.2K]

Answer:

The volume we need is 8.89 mL

Explanation:

We analyse data:

36 % by mass → 36 g of HCl in 100 g of solution

Solution's density = 1.179 g/mL

5.20L → Volume of diluted density

pH = 1.70 → [H⁺] = 10⁻¹'⁷⁰ = 0.0199 M

HCl → H⁺ + Cl⁻

0.0199

pH can gives the information of protons concentrations, so as ratio is 1:1, 0.0199 M is also the molar concentration of HCl

Let's verify the molar concentration of the concentrated solution:

We convert the mass to moles: 36 g / 36.45 g/mol = 0.987 moles

As the solution mass is 100 g, we apply density to find out the volume:

Density = Mass / volume → Volume = Mass / Density

Volume = 100 g / 1.179 g/mL → 84.8 mL

Let's convert the volume from mL to L in order to define molarity

84.8 mL . 1L/ 1000mL = 0.0848 L

Molarity → 0.987 mol / 0.0848L = 11.6M

Let's apply the dilution formula:

M concentrated . V concentrated = M diluted . V diluted

11.6 M . V concentrated = 0.0199M . 5.20L

V concentrated = (0.0199M . 5.20L) / 11.6M → 8.89×10⁻³L

We can say, that the volume we need is 8.89 mL

8 0

3 years ago

Write the rate law for the reaction 2A + B → C if the reaction

konstantin123 [22]

Answer:

1. $R=k[A]^1[B]^2$

2. $R=k[B]^1$

3. $R=k[A]^0[B]^0=k$

4. $R=k[A]^1[B]^{-1}$

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

(1) is second order in B and overall third order.

2A + B → C

Order of the reaction = sum of stoichiometric coefficient

= x + 2 = 3

x = 1

Rate of the reaction =R

$R=k[A]^1[B]^2$

(2) is zero order in A and first order in B.

2A + B → C

Rate of the reaction =R

$R=k[A]^0[B]^1=k[B]^1$

Order of the reaction = sum of stoichiometric coefficient

= 0 + 1 = 1

(3) is zero order in both A and B .

2A + B → C

Order of the reaction = sum of stoichiometric coefficient

= 0 + 0 = 0

Rate of the reaction =R

$R=k[A]^0[B]^0=k$

(4) is first order in A and overall zero order.

2A + B → C

Order of the reaction = sum of stoichiometric coefficient

= 1 + x = 0

x = -1

Rate of the reaction = R

$R=k[A]^1[B]^{-1}$

4 0

3 years ago

Compound AB decomposes into elements A and B by the following reaction: AB →A + B. If you produce 10.00 g of B and 3.00 g of A,

zavuch27 [327]

Answer:

13.00 g

Explanation:

To solve this problem, you need to understand the law of conservation of mass. This law means that whatever amount you start out with is what you should have at the end. The amount may be in different forms, but that amount is still there.

If you produced 10.00 g of B and 3.00 g of A, you should have started out with 13.00 g of AB.

10.00 + 3.00 = 13.00

8 0

4 years ago

As the sun heats the surface of the oceans, two layers of water result. What separates the layers?

Basile [38]

Answer:

Thermocline separate these two layers.

Explanation:

Ocean consist of three major layers on the basis of temperature.

1. Upper layer

2. Deep layer

3. Thermocline

Upper layer:

The first layer is called upper layer which is present on the surface and directly expose to the sun. The sun heat up this upper layer easily and warm it.

Deep layer

The deep layer is present below the thermocline. It is present in deep where sunlight can not approach to it and its temperature remain low.

Thermocline

It is the middle layer, present between the upper and deep layer. It separated the upper layer from deep layer. Its upper portion is warmer while lower is colder.

4 0

3 years ago

2 AgNO3(aq) + CaCl2(aq) -----> 2 AgCl(s) + Ca(NO3)2(aq)

yan [13]

5.732 grams of AgCl is formed when 0.200 L of 0.200 M AGNO3 reacts with an excess of CaCl2.

Explanation:

The balanced equation:

2 AgNO3(aq) + CaCl2(aq) -----> 2 AgCl(s) + Ca(NO3)2(aq)

data given:

volume of AgNO3 = 0.2 L

molarity of AgNO3 = 0.200 M

atomic weight of AgCl= 143.32 gram/mole

from the formula, number of moles can be calculated

Molarity = $\frac{number of moles}{volume in litres}$

number of moles of AgNO3 = 0.04

From the reaction:

2 moles of AgNO3 reacts to form 2 moles of AgCl

0.04 moles of AgNO3 reacts to form x mole of AgCl

$\frac{2}{2}$ = $\frac{x}{0.04}$

= 0.04 moles of AgCl is formed

mass of AgCl formed is calculated by multiplying number of moles with atomic mass of AgCl

mass of AgCl = 0.04 x 143.32

= 5.732 grams of AgCl is formed.

4 0

3 years ago