please help !!

Molecules CaSiO3
2. Before conducting a chemical reaction, I complete my RICE table and find that I should get
84.9 g of my desired product. However, after running the experiment, I actually end up with 78.4
g of my desired product. What was my percent yield?
% yield
3.
Balanced chemical reaction: Ca(CO3) -
3 CO,+ CaO
Based on the above balanced
chemical reaction, how many Liters of CO2 gas (at STP)
should be formed if the mass of CO2 is 24 grams?
L of CO2 gas
4. I burned 280 grams of CH4O2 gas with 7.2 moles of Oxygen gas, according to the following
67 words

Answer:

B

Explanation:

Neutralisations are always double replacement reactions

Answer:

a. 0.8 moles of CO₂ are produced when 0.400 mol of C₆H₁₂O₆ reacts.

b. 7.5 grams of C₂H₅OH are produced by 14.67 grams of C₆H₁₂O₆.

c. 7.17 grams of CO₂ form when 7.50 g of C₂H₅OH are produced.

Explanation:

The balanced reaction is:

C₆H₁₂O₆  → 2 C₂H₅OH + 2 CO₂

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

The molar mass of each compound is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Then you can apply the following rules of three:

a. If 1 mole of C₆H₁₂O₆ produces 2 moles of CO₂, 0.4 moles of C₆H₁₂O₆ produces how many moles of CO₂?

[tex]moles of CO_{2} =\frac{0.4 moles of C_{6} H_{12} O_{6} *2moles of CO_{2} }{1 mole of C_{6} H_{12} O_{6} }[/tex]

moles of CO₂= 0.8 moles

0.8 moles of CO₂ are produced when 0.400 mol of C₆H₁₂O₆ reacts.

b. If 92 grams of C₂H₅OH are produced by 180 grams of C₆H₁₂O₆, 7.5 grams of C₂H₅OH are produced by how many mass of C₆H₁₂O₆?

[tex]mass of C_{6} H_{12} O_{6}=\frac{7.5 grams of C_{2} H_{5} OH* 180 grams of C_{6} H_{12} O_{6}}{92grams of C_{2} H_{5} OH}[/tex]

mass of C₆H₁₂O₆= 14.67 grams

7.5 grams of C₂H₅OH are produced by 14.67 grams of C₆H₁₂O₆.

c. If 92 grams of C₂H₅OH are produced along with 88 grams of CO₂, 7.5 grams of C₂H₅OH are produced along with how many mass of CO₂?

[tex]mass of CO_{2}=\frac{7.5 grams of C_{2} H_{5} OH* 88 grams of C O_{2}}{92grams of C_{2} H_{5} OH}[/tex]

mass of CO₂= 7.17 grams

7.17 grams of CO₂ form when 7.50 g of C₂H₅OH are produced.

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Answer:

true

Explanation:

because I'm smart yes yes

Answer:

[tex]{ \bf{from \: ionic \: product \: of \: water : }} \\ { \boxed{ \tt{k _{w} = [H _{3} O {}^{ + } ][OH {}^{ - } ]}}} \\ \\ { \tt{1 \times {10}^{ - 14} = (1 \times {10}^{ - 5} ) [OH {}^{ - } ]}} \\ \\ { \tt{[OH {}^{ - } ] = 1 \times {10}^{ - 9} }} \: M[/tex]

A solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.

The water is made up of H2O only and when the pH of it is 7 then the concentration of all the ions would be the same while dissociation the water will get dissociate into H+ ions and OH- ions.

The concentration of OH- ions will be

OH- = Kw {H3O+}

{H3O+} = 1 × 10−5 M.

Kw = 14

substituting the value in the equation,

OH = 14 { 1 × 10−5 M.}

OH = 1 × 10−9 M

Therefore, the solution has an [H3O+] of 1 × 10−5 M the [OH−] of the solution will be 1 × 10−9 M and option C is correct.

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Answer:it will be 425/10

Explanation:cause you are asking fraction so if you divide it by 10 dot would go backwards

Answer:

Firstly, search for proper Job by which she can earn money & from that money she can use it for her study

Explanation:

If I was in that situation, then I would do this.

I am sorry if you wouldn't like mine suggestion

Answer:

SiO2

Explanation:

Answer:

Arrow a represents photosynthesis. 2 it transforms sunlight, water, and carbon dioxide into gluton, or food for the plants. 3 It recycles carbon because humans breath in oxygen and exhale carbon dioxide, plants then take in the carbon and exhale oxygen.

Explanation:

Answer:

B Reaction happens in both directions.

Answer:

B. Reaction happens in both directions!

Explanation:

Dynamic equilibrium is reached once a reaction becomes reversible -- meaning that, when a reaction is in dynamic equilibrium, the forward reaction rate and the backward reaction rate, are equal or occurring at the same time!

Equilibrium is really just like saying they're [the reactions] at a point where they're both "balanced" and so they're equal, nothing is changing and they're going equally both ways!  (This is just for explanatory reasons, but "balanced" isn't the correct term to use for dynamic equilibrium, as it is used for other things in Chemistry!)

Hope this helps a little! [And that I didn't confuse you!] :)

Answer:

19.5g is the theoretical yield of alum

Explanation:

Based on the balanced reaction, 4 moles of sulfuric acid produce 2 moles of alum. To solve this question we need to find the moles of H2SO4. With these moles we can find the moles of alum and its mass assuming all sulfuric acid reacts producing alum.

Moles Sulfuric Acid:

8.3mL = 0.0083L * (9.9mol/L) = 0.08217 moles sulfuric acid

Moles Alum:

0.08217 moles sulfuric acid * (2mol KAl(SO4)2•12H2O / 4mol H2SO4) =

0.041085 moles KAl(SO4)2•12H2O

Mass Alum -Molar mass: 474.3884 g/mol-

0.041085 moles KAl(SO4)2•12H2O * (474.3884 g/mol) =

Answer:

Vaporization

Since the question does not specify what molecule is being acted upon by the increment in temperature, I'll assume it's water.

When first taken out of the fridge, water is in the form of ice, and it has not been affected by a change in temperature yet, so it's at the origin.

(origin = ice)

As you raise the temperature, however, the ice starts to melt, and melting occur during phase 2. You have to keep the temperature constant for the process to properly occur.

(phase 2 = melting)

After it finishes melting, the ice is now in it's liquid state, which is water. The temperature continues to rise in order to proceed to the next phase.

(2nd slope = water)

Lastly, Water is being vaporized during phase 4. Notice, the temperature is kept constant in order to allow the process to properly occur.

(phase 4 = vaporization)

Answer:

Waves carry energy from one place to another.

Because waves carry energy,some waves are used for communication,eg radio and television waves and mobile telephone signals.

Explanation:

i hope it helps

that's my answer

correct me if im wrong

Answer:

Nonpolar Covalent Bond

Explanation:

A nonpolar covalent bond is one in which the bonding electrons are evenly distributed between the two atoms.

Good Luck!

Hope this helps!

:)

Answer:

Gamma rays—3 and radio waves—2

Explanation:

hard time seeing question, but i believe it is Gamma rays—3 and radio waves—2

 Upwelling is caused by the winds that on the oceans surface is the correct answer.

Ocean currents are water flow patterns that have an impact on climate zones and weather patterns all around the globe.

When winds blow they push the water from an area and to replace the displaced water water rises from beneath the surface and this process is called Upwelling.

Therefore Option C , Upwelling is caused by the winds that on the oceans surface is the correct answer.

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Explanation:

mass number....................

Answer:

Particles are constatantly moving and diffusing

This is possible because of diffusion

Explanation:

Hope this helps

Answer:

200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water.

Explanation:

The solution is the result of the mixture between the solute, which is the substance that dissolves, and the solvent, which is the substance in which a solute dissolves. That is, a solution (or solution) is a mixture of two or more components, perfectly homogeneous since each component is intimately mixed with the other.

The concentration of solutions is the amount of solute contained in a given amount of solvent or solution. A unit of concentration is the percent weight to volume.

The percent weight to volume is the percentage ratio between the weight of the solute and the volume of the solution. It is calculated as:

[tex]Percent =\frac{mass of solute}{volume of solution} *100[/tex]

Mass is measured in grams, while volume is measured in mL.

In this case:

Replacing:

[tex]6=\frac{12 g}{volume of solution} *100[/tex]

Solving:

volume of solution*6= 12 g*100

[tex]volume of solution=\frac{12 g}{6} *100[/tex]

volume of solution= 200 mL

200 mL of water is needed to make up a 6.00% (m/v) solution of copper (II) sulphate when 12.0 g of it will be added to water

Answer:

They grow slowly over time, they are made up of multiple organisms.

Explanation:

One polyp is one individual. A Coral is made up of several polyps. Each polyp is less than 1 centimeters but a coral is made of many polyp so the coral itself cant be 1 centimeters across.

Answer:

Most oxidation-reduction (redox) processes involve the transfer of oxygen atoms, hydrogen atoms, or electrons, with all three processes sharing two important characteristics: (1) they are coupled—i.e., in any oxidation reaction a reciprocal reduction occurs, and (2) they involve a characteristic net chemical change— .

Electrons will be transferred during redox reaction.

The electron is subatomic particles which are placed in surrounding the nucleus. Electrons carry negative charge.

Redox reaction involve the transfer of electrons between intermediates. A redox reaction occurs when the oxidation states of the substrate change. The removal of electrons or even a rise in the oxidation state of such a chemical or its atoms is referred to as oxidation. The acquisition of electrons or a lowering in the oxidation number of a chemical or the atoms inside it is referred to as reduction.

Hence the answer will be electron

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Answer:

The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent.

Explanation:

Answer: The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent.

Explanation:

The intermolecular forces between paraffin molecules are entirely due to dispersion forces, and are therefore size dependent. 103 Paraffin wax is soluble in: a) water; b) hexane; c) acetone; d) ethanol Is shopping bag (polyethylene)

hope it helps

Answer:

The mass of solid copper chloride used in each experiment=15 g

Explanation:

We are given that

Mass of copper chloride in solution=300g/dm3

Volume of solution used in each experiment=50 cm3

We have to find the mass of solid copper chloride used in each experiment.

[tex]1cm^3=0.001 dm^3[/tex]

[tex]50cm^3=0.05 dm^3[/tex]

1 dm3 contained solid copper chloride=300 g

0.05 dm3 contained solid copper chloride=[tex]300\times 0.05[/tex]g

0.05 dm3 contained solid copper chloride=15 g

Hence, the mass of solid copper chloride used in each experiment=15 g

Answer:

4.65 moles

Explanation:

1 mole ---> 6.022×10²³ atoms of si

X mole ---> 2.8×10²⁴ atoms of si

X= 2.8×10×10²³/6.022×10²³

=28/6.022

=4.65moles

Answer:

everything can be found in the picture