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The required moles of AgBr precipitate produced by given moles of silver nitrate is 0.0123.

Molarity of any solution is define as the moles of solute present in per liter of the solution and it will be represented as:
M = n/V

Given that, molarity of AgNO₃ = 0.250M

Volume of AgNO₃ = 49.5mL = 0.0495L

Moles of AgNO₃ = (0.25)(0.0495) = 0.0123mol

Given chemical reaction is:

2AgNO₃(aq) + CaBr(aq) → 2AgBr(s) + Ca(NO₃)₂(aq)

As it is mention that CaBr is present in excess quantity and AgNO₃ is the limiting reagent so the formation of precipitate will depend on the AgNO₃.

From the stoichiometry of the reaction, it is clear that:

2 moles of AgNO₃ = produces 2 moles of AgBr

0.0123 moles of AgNO₃ = produces 2/2×0.0123=0.0123 moles of AgBr

Hence 0.0123 is the required moles of precipitate.

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Answer:

2672 kj

Explanation:

C4H10 O mole wt =  48 + 10 + 16 =~ 74 gm

27200 gm / 74 gm/mole = 367.57 moles

367.57 moles * 7.27 kj/mole =

Answer:

because the water vapor still has the same molecular structure as liquid water (H2O). If the bubbles were caused by the decomposition of a molecule into a gas (such as H2O →H2 and O2), then boiling would be a chemical change.

Explanation:

Boiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). If the bubbles were caused by the decomposition of a molecule into a gas (such as H2O →H2 and O2), then boiling would be a chemical change.

An unbalanced force is affecting the objects and is therefore denoted as option C in this scenario.

These are the type of forces which cause an object on which it is acting to accelerate or change its position.

The unbalanced force is responsible for the movement of the ball and the pins being knocked down due to unequal forces on the same side.

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Answer:

Total pressure increased

Explanation:

When gas C is added in the vessel then number of mole increases and number of collision depends on the number of molecules present in the vessel and on adding gas C ,mole also increases hence  number of collision increases therefore pressure also increases because number of collision increases.

Total pressure increases.

Answer:

The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.

Explanation:

The measurement of the effect of gravity on an object's mass is called weight. While mass m is a measurement of the object's amount of matter. W=mg provides the weight.

The formula W (weight) = m (mass) times g (gravity, on Earth typically measured at 9.8 N/kg) allows you to determine something's weight from its mass and vice versa.

The common weight calculation formula is W = mg (N/kg). Here, "g" stands for the acceleration brought on by gravity. The value of g on earth is 9.8 m/s2. Other names for it include the gravitational constant.

A body's mass, which is a measurement of how much matter it contains, is equal to its weight when multiplied by the acceleration caused by gravity. The SI unit of weight is the Newton, and the SI unit of mass is the kilogramme (kg) (N).

Thus,The formula relating mass and weight is W=mg.

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Answer:

When comparing two ions, gaining the same electrons, atomic radii, you can follow the same general rule as regular ionic radius.

Explanation:

In general, Sulfur has a larger atomic radius than Oxygen, as it is lower on the periodic table. Since they both are gaining the same amount of electrons, the trend still applies

The name of the compound is thulium (iii) sulfate and it's molecular formula is:

[tex]Tm_2(SO_4)_3[/tex]

The molecular formula of a compound is the formula showing the ratio in which atoms of elements combine in 1 mole of the compound.

The oxidation state of thulium is +3 and the oxidation state of SO4 is +2.

By exchange of radicals, the molecular formula of the compound is as :

[tex]Tm_2(SO_4)_3[/tex]

The name of the compound is thulium (iii) sulfate.

Therefore, the compound is thulium (iii) sulfate.

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Explanation:

Adding logs of same base is equivalent to multiplying the arguments. You get:

[tex] log_{3}(35x) = 4[/tex]

Use the definition of the log to turn this into an exponential function:

[tex] {3}^{4} = 35x[/tex]

[tex]81 = 35x[/tex]

[tex]x = \frac{81}{35} [/tex]

Answer:

Nothing.

Explanation:

Onsidians reaction point is 1,830'f.

Based on the mole ratio of the reaction, 30 moles of NO2 will be produced from 15 moles of oxygen.

The mole ratio of a reaction is the ratio in which moles of reactants combine with themselves to form moles of products.

The equation of the reaction is given below:

[tex]2 NO (g) + O_2 (g) ---> 2 NO_2 (g)[/tex]

The mole ratio of NO2 to oxygen is 2 : 1

Molles of NO2 produced from 15 moles of O2 = 15 × 2 = 30 moles

Therefore, 30 moles of NO2 will be produced from 15 moles of oxygen.

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Answer:

See Below.

Explanation:

Recall that molarity is defined by moles of solute over liters of solution (mol/L).

Therefore, to make 90.0 mL of 2.0 M MgSO₄, we will need:

[tex]\displaystyle 90.0\text{ mL} \cdot \frac{2.0\text{ mol MgSO$_4$}}{1\text{ L}} \cdot \frac{1\text{ L}}{1000\text{ mL}} = 0.18\text{ mol MgSO$_4$}[/tex]

Convert this amount to grams. The molecular weight of MgSO₄ is 120.38 g/mol:

[tex]\displaystyle 0.18\text{ mol MgSO$_4$} \cdot \frac{120.38\text{ g MgSO$_4$}}{1\text{ mol MgSO$_4$}} = 22\text{ g MgSO$_4$}[/tex]

Therefore, to make the solution, we can add 22 grams of MgSO₄ into a graduated cylinder, then mix and dilute the solution with distilled water until we reach 90.0 mL.

Answer:

See below

Explanation:

MgSO4 mole wt = 24.3+32+16*4 = 120.3 gm

 for 90cc of 2M:

90/1000 * 2 * 120.3 = 21.66 gm

take 21.66 gm of the solid and dilute with water to 90 ml

Answer:

75°C

Explanation:

Answer: 75°C because KCL at 75°C goes into 50g in Solubility in 100g water. TRUST ME ITS RIGHT.

[tex]\huge\mathbb{✒ANSWER}[/tex]

HI BRAINLY USER!!

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This can be rounded to 673g

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A 10.0 g-sample of liquid water absorbs 50 cal of energy when its temperature increases from 13 °C to 18 °C.

Heat is a form of energy resulting from the difference in temperature between two bodies.

A sample of water initially at 13 °C, absorbs energy in the form of heat and its temperature increases to 18 °C.

We can calculate the amount of heat absorbed using the following expression.

Q = c × m × ΔT

Q = 1.0 cal/g°C × 10.0 g × (18 °C - 13 °C) = 50 cal

where,

A 10.0 g-sample of liquid water absorbs 50 cal of energy when its temperature increases from 13 °C to 18 °C.

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Answer:

The answer is A. Aquifer

Explanation:

It stores groundwater.

The energy needed to raise the temperature of water from 22.0ºC to 90.0ºC is c. 28.4 kJ.

The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.

By the formula [tex]Q = mc\Delta T[/tex]

Q is the heat

m is the mass

c is the specific heat

Now, c = 4.184 J/g.K

The change in temperature is 22.0 ºC to 90.0 ºC

Putting the value in the equation

[tex]Q = 100 \times 4.184 \times (90.0 - 22.0)\\\\Q = 4.184 \times 68.0\\ \\Q= 284.5 \;J[/tex]

Thus, the energy needed to raise the temperature of water from 22.0ºC to 90.0ºC is 28.4 kJ

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Answer:

First you'll need to divide the mass of K2Cr2O7 by its molar mass and volume which should be easy but I'll do some of it to help you out

Explanation:

[tex]K_{2}Cr_{2}O_{7}[/tex]

[tex]2K = 39.098 = 2(39.098) = 78.196[/tex]

[tex]2Cr = 51.996 = 2(51.996) = 103.992[/tex]

and

[tex]7O = 15.999 = 7(15.999) = 111.993[/tex]

[tex]78.196 + 103.992 + 111.993 = 294.181[/tex]

so that's the mass of K2Cr2O7 and then you divide it by the molar mass and volume.

Hopefully you can do that on your own! Hope I helped a bit atleast and I have a good feeling about 0.438 but I don't want you to just guess

Density for 98% = 1.84 g/mL

V M = # mol

0.1 L x 1 M = 0.1 mol

0.1 mol x 98 g/mol = 9.8 g

m =%CDV

9.8 g = 0.98 x 1.84V

V = 5.43 mL

take this volume and carefully (acid to ater) dilute till 100 mL

Answer: Option A

Explanation:

Increase in temperature will  increase the yield of the product and cause a shift to the right.

This is the type of reaction in which reactants absorb heat energy from the surroundings to form products.

This depicts that an increase in temperature will increase the yield of products thereby making option A the most appropriate choice.

Explanation:

Hope it helps...

Answer:

H2o,hydrogen,carbonoxide

Answer:

see below

Explanation:

K.E. = 1/2 * m * v^2

      = 1/2 * 2 * 5^2     j

Answer:

1. yes

2. yes

3. No

Hope this helps!!

The kind of weather front that would be responsible for the forecast given above is:
"Cooler temperatures and clear skies in 2 days."

A weather front in Meteorology refers to the zone where transition occurs between two different air masses a the surface of the earth. That is, you have warm air (which usually results in low pressures, and of course rain) and cold air.

Warm air creates rain because a warm mass of air will hold moisture collected from a large geographical space. This air cools as it rises, then eventually transits into precipitation - rain.

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Answer:

9.59 atm

Explanation:

Use ideal gas law    PV = n RT

 V = 5.34 L    n = 1.82 mole   T = ( 69.58+ 273.15) = 342.73 K

         R = .082057  L-Atm/(K - mole)

P  = n RT / V = 9.59 Atm

Answer:

Examples of metals are aluminium, copper, iron, tin, gold, lead, silver, titanium, uranium, and zinc.

Explanation: This is was makes a metal a metal: it needs to be:

high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light.

A solution has a pOH of 2.40. And it's pH is -11.6.

A solution has a pOH of 2.40. And it's pH is -11.6.

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