What mass of solute is needed to prepare each of the following solutions?
a. 1.00 L of 0.125 M K2SO4
b. 375 mL of 0.015 M NaF
c. 500 mL of 0.350 M C6H12O6

Answer:

b

Explanation:

there is nothing with which it can react

Explanation:

The limiting reactant(s) prevents a reaction from continuing because there is none left.

Identification of the limiting reactant makes it possible to calculate the theoretical yield of a reaction. The reason there is a limiting reactant is that elements and compounds react according to the mole ratio between them in a balanced chemical equation.

The reactant that is consumed first and limits the amount of product(s) that can be obtained is the limiting reactant. To identify the limiting reactant, calculate the number of moles of each reactant present and compare this ratio to the mole ratio of the reactants in the balanced chemical equation.

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Answer:

The density is 6

Explanation:

p = m × v

p = 3 × 2

p = 6

Hope this helped! :)

The density of the substance depends on the mass and the volume of the substance or object. It is given by the ratio of mass and volume. The density of 3 gm solid is 1.5 g/cm³.

In chemistry and physics, density is a quantitative measurement that tells about the tightness of the substance packed in an area. It relates to two parameters that include mass and volume.

The density can be said to have a proportion of mass to the volume of the substance. The mass can be in grams or kilograms, while volume can be in a liter, cubic meter, and cubic centimeter.

Given,

Mass of solid (M) = 3 gm

The volume of solid (V) = 2 cm³

Density (ρ) is calculated as:

ρ = M ÷ V

= 3 ÷ 2

= 1.5 gm/cm³

Therefore, 1.5 gm/cm³ is the density of 3 gm solid.

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Answer: The heat required to raise the temperature of 179 g of acetic acid, is 21000 Joules

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

[tex]Q=m\times c\times \Delta T[/tex]

Q = Heat absorbed  = ?

m = mass of acetic acid = 179 g

c = heat capacity of acetic acid = [tex]2.043J/g^0C[/tex]

Initial temperature  = [tex]T_i[/tex] = [tex]25^0C[/tex]

Final temperature = [tex]T_f[/tex]  = [tex]82.7^0C[/tex]

Change in temperature ,[tex]\Delta T=T_f-T_i=(82.7-25)^0C=57.7^0C[/tex]

Putting in the values, we get:

[tex]Q=179g\times 2.043J/g^0C\times 57.7^0C=21100J[/tex]

Thus heat required to raise the temperature of 179 g of acetic acid, is 21000 Joules

Answer:

Explanation:

Radiation from the sun heats the ground, then the ground heats the air by process of conduction. When that happens air temp. and density start to change causing air convection currents. Hope I help.

Answer:0.100

Explanation:

Answer:

I think they both need heat.

Explanation:

Answer:

Nvr XD

Explanation:

Answer:

the world may never know

Explanation:

Answer:

0.164541341 g H2

Explanation:

1) Convert grams to moles by dividing by RMM of Magnesium (24.31g).

  2g Mg * (1 mol Mg / 24.31 g Mg) = 0.082270671 mol of Mg

2) Use the balanced equation's ratio of 1 mol Mg: 1 mol H2.

  0.082270671 mol of Mg = 0.082270671 mol of H2

3) Convert the mol of H2 back into grams by multiplying by H2's RMM (2 g).

  0.082270671 mol of H2 * 2 g H2 = 0.164541341 g H2

* Answer can be rounded to your liking *

Answer:

[tex]T1=166.66K[/tex]

Explanation:

According to Gay-Lussac’s law simply states that the ratio of the initial pressure and temperature is equal to the ratio of the final pressure and temperature for a gas of a fixed provided that the mass is kept at a constant volume.

Given:

Initial pressure, P1 = 1 atm

Final pressure, P2 = 1.5 atm

Final temperature, T2 = 250 K

The law can be applied using the below formula

P1T2 = P2T1

Then,

T1 = (P1T2)/P1 = (1*250)/(1.5) = 166.66 Kelvin.

[tex]T1=166.66K[/tex]

:

Answer:

[tex]T_1=166.7K[/tex]

Explanation:

Hello,

In this case, by applying the Gay-Lussac's law which help us to understand the pressure-temperature gas behavior via a directly proportional relationship:

[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2}[/tex]

In such a way, as we are asked to compute the initial temperature knowing the initial pressure and final both temperature and pressure, so we solve for it:

[tex]T_1=\frac{T_2P_1}{P_2}=\frac{250K*1atm}{1.5atm} \\\\T_1=166.7K[/tex]

Best regards.

Answer:

254.7 g

Explanation:

Hg(ONC)2 -----------> Hg + N2 + 2CO

In every problem of stoichiometry, we must commence with writing the balanced reaction equation as a guide to our calculation. Once we have written the reaction equation, we can now proceed with the solution.

Amount of CO produced= mass of CO produced/ molar mass of CO

Molar mass of CO = 28 gmol-1

Mass of CO produced= 50.2g

Amount of CO produced= 50.2g/28gmol-1

Amount of CO produced= 1.79 moles of CO

From the reaction equation:

1 mole of Hg(ONC)2 produced 2 moles of CO

x moles of Hg(ONC)2 will produce 1.79 moles of CO

x= 1.79 × 1 / 2

x= 0.895 moles of Hg(ONC)2

Molar mass of Hg(ONC)2 = 284.624 g/mol

Mass of Hg(ONC)2 = number of moles × molar mass = 0.895 moles × 284.624 g/mol

Mass of Hg(ONC)2 = 254.7 g

Answer:

B

Explanation:

Answer:t

Explanation:bc

Answer:

Single Displacement reaction  

In a displacement reaction, a more reactive element replaces a less reactive element from a compound.

Change in colour takes place with no precipitate forms.

Metals react with the salt solution of another metal.

Examples:

2KI + Cl2 → 2KCl + I2

CuSO4 + Zn → ZnSO4 + Cu

Double displacement reaction

In a double displacement reaction, two atoms or a group of atoms switch places to form new compounds.

Precipitate is formed.

Salt solutions of two different metals react with each other.

Examples:  

Na2SO4 + BaCl2 → BaSO4 + 2NaCl

2KBr + BaCl2 → 2KCl + BaBr2

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Answer:

it has  a huge surface-to-volume ratio, very high porosity and completely different physiochemical properties.

Explanation:

idk if the answer is good  !

sorry

Answer:

a new substance is produced

Explanation:

i just took my test and got this question right

The best evidence that a chemical reaction occurs when coal burns is a new substance is produced. The correct option is A.

Coal is a carbon containing fossil fuel, which is formed when the organic matter is decomposed inside the earth with heat and pressure by the earth crust. It is the most used fossil fuel.

Carbon dioxide is a gas produce when these fossils fuel burned. It is a green house gas and increase the warmth of the earth when produced. It is taken by plants to make their food.

When coal burns, it produces carbon dioxide which is a gas and coal is a solid, so here the chemical reaction is happening which is producing a new substance.

Thus, the correct option is A. A new substance is produced.

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Answer:

C

Explanation:

4× CH2 = C4H8

Answer:

Weather is the state in which a certain part inside the atmosphere is hot or cold.Climate is the usual weather in a certain place in the world or atmosphere.One way weather can affect climate is global warming,which is when the world gets hotter and the ice in the world melts and water rises.

Explanation:

climate can be defined as the long-term weather.

Answer:

it's a, acid and base

Explanation:

a neutralization reaction occurs between strong acids and strong bases and result in the formation of a salt and water

Answer:

They are directly related.

Temp decrease then volume decrease

Temp increase then volume increase

Answer:

A) remove germs from the blood

Explanation:

cause the rest are the skeletal system function

Answer:

The skeletal system does not remove germs from the blood

Explanation:

I learned that from my teacher

Answer:

n= 0.03 moles

Explanation:

Using the ideal gas law:

PV=nRT

nRT=PV

n= PV/RT

 n: moles

 P: pressure in atm

 V= volume in L

 R= Avogadro's constant = 0.0821

 T= Temperature in K => ºC+273.15

n= (0.925 atm)(0.80 L) / (0.0821)(300.15 K)

n= 0.03 moles

Answer:

It is illegal

Explanation:

Fracking involves drilling deep into the earth crust in which a water mixture with high pressure is directed at the rock with the purpose of releasing the gas inside. This process is common in the exploration of natural gas and other hydrocarbons.

It is however illegal because the water are mostly contaminated due to the hydrocarbons present and harmful to life. It is advisable and the best to remove the water and recycle them in treatment plants

Answer:

B

Explanation:

first find the no. Of moles of H2SO4

=  75/98.1

= 0.7645

Next step

In on mole of H2SO4 the no.of oxygen atom is 4.

1 H2SO4 : 4 O

0.7645  : x                     x= 0.7645x4= 3.0581

next multiply avogadros constant

3.0581 x 6.022× 10^23 =1.84x10^24

Mass present in 1 gram of mole substance is called molar mass. Molar mass is calculated by: dividing the mass of the compound in grams by the number of moles present in the substances.

The correct answer is:

option B. 1.84 × 10²⁴

Given,

1.The moles of sulfuric acid can be calculated by

M = m ÷ n

where M is molar mass, m is mass and n moles.

moles of sulfuric acid = mass ÷ molar mass

= 75 g ÷ 98.1 g/mol  

=0.7645 moles

Hence moles of sulfuric acid present is 0.7645 moles.

2. 1 mole of sulfuric acid = 4 oxygen atoms.

Then, 0.7645 moles of sulfuric will contain: 0.7645 × 4 = 3.0581 atoms of oxygen

3. Oxygen atoms present in 75.0 g of H₂SO₄ will be calculated by multiplying it with Avogadro's constant:

= 3.0581 x 6.022× 10²³

= 1.84x10²⁴

Therefore, 1.84 × 10²⁴ oxygen atoms will be found in 75.0 g of H₂SO₄.

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Answer:

It is widely believed that Buddhism entered China via the Silk Road under the Han Dynasty. After trade and travel was established with the Yuezhi, who by that time were forced southward toward India, Yuezhi monks began to travel with the merchant caravans; preaching their religion along the Silk Road.

Explanation:

i got this from google

Answer:

C.

Explanation:

Because it decreases from October trough december

Answer:

(B)

Explanation:

Silver chloride is a simple ionic compound consisting of the silver cation (Ag+) and chloride anion (Cl-).

Answer:

ether

Explanation:

ether is -OR

- Hope that helps! Please let me know if you need further explanation.