Using the chemical formula CaO + 2 NaCl → Na2O + CaCl2, calculate how many moles of CaCl2 you would produce if you used up 5.4 moles of CaO?

Food webs are connected to each other and sensitive to any changes.

A food web is the natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community.

From the information given in the passage, we can conclude the following based on the meaning of food webs.

Complete question is below:

Changing one organism in a food web would not have any effect on any other food web.

It is easy to see all the ways that food webs are connected.

Food chains are always separate from each other.

Food webs are connected to each other and sensitive to any changes,

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Answer:

Rubber is an insulator.

Remaining three are metals and hence conductors.

Answer:

B. 2 HCl (aq) + Ba(OH)2 (aq) → BaCl2 (aq) + 2 H20 (1)

Explanation:

When you combine an acid and a base, the products are water (H2O), and an ionic compound, or salt.

Option B is the only one that contains an ionic compound (BaCl2) and water as the products.

Answer:

1.The electonic configuration of elements and their position in the periodic table are related to each other, From the electronic configuration of the elements, we can determine the period and the group to which the element belongs

Let's consider, sodium with atomic number 11 and k, l, and M shells have 2,8,and 1 electrons. since, there are 3 principal energy levels so we concluded sodium belongs to third period M Shell(valance shell) has only 1 electrons. so sodium belongs to group 1.

2. Entire D-block elements are known as Transition Elements.

3. Group 17 is the halogen group.

4. Main group of elements are...... 1,2, and 13 through 18.

5. Group 18 are the noble gas elements .

12. a). Smaller

b). Increases

c). More reactive

d). Softer

7. a). k › Ca › Ge › Br › Kr

b). Ra › Ba › Sr › Ca › Mg › Be

9. a). Ca(calcium) ion is smaller.

b). Cl(chlorine) atom is smaller.

c). Mg(magnesium) atom is smaller.

10. a). F(fluorine)

b). Sr(strontium)

c). Pb(lead)

d). At(Astatine)

Answer:

SEE BELOW

Explanation:

Given   500 cm^3 = V1    760 mm = P1     (760*2) = P2

Required   V2

P1V1 = P2V2

RE-ARRANGE  TO    P1V1/P2 = V2

(760)(500) /(760*2) = V2

V2 = 250 ML

According to Boyles law

[tex]\\ \rm\Rrightarrow P\propto \dfrac{1}{v}[/tex]

Now pressure is doubled means multiplied by 2

The volume will be divided by two of get halved .

New volume

Answer:

super saturation takes place.

The number of moles of carbon in a sample of C4H10 that also contains 200 g of hydrogen is 80 moles.

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.

According to this question, a sample of C4H10 was given meaning that the ratio of carbon to hydrogen is 4:10.

If 200 g of hydrogen is contained in the sample, then 200 × 4/10 = 80g of carbon is present.

no of moles of C = 80

Therefore, the number of moles of carbon in a sample of C4H10 that also contains 200 g of hydrogen is 80 moles.

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The answer is option 2 , the smallest whole-number coefficients, the coefficient of Pb²⁺ will be 2.

What is a Balanced Chemical Equation ?

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that total mass on the reactant side must be equal to the total mass on the product side.

There are two types of numbers that appear in chemical equations.

There are subscripts, which are part of the chemical formulas of the reactants and products;

and there are coefficients that are placed in front of the formulas to indicate how many molecules of that substance is used or produced.

Balance The Equation:

Pb²⁺ + Au²⁺ = Pb⁴⁺ + Au

Label Each Compound With a Variable

Label each compound with a variable to represent the unknown coefficients.

aPb²⁺ + bAu²⁺ = c Pb⁴⁺ + d  Au

Create a System of Equations

Create an equation for each element where each term represents the number of atoms of the element in each reactant or product.

Pb: 2a + 0b = 4c + 0d

Au: 0a + 2b = 0c + 1d

e: 0a + -1b = -1c + 0d

2a - 4c = 0

2b - 1d = 0

-1b + 1c = 0

Solve For All Variables

Use substitution,

Substitute Coefficients and Verify Result

2Pb²⁺ + Au²⁺ =  Pb⁴⁺ + 2 Au

So the answer is 2 , option 2

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Answer:

is D :)

Explanation:

Answer:

volume = 1.04 dm^3

Explanation:

Data:

volume = ?

Molarity, M = 0.25M

mass = 28.5g

Molar mass = 110.25g

Moles = ?

Solution:

First find number of moles,

 moles = mass in gram / molar mass

             = 28.5 / 110.25

              = 0.258

              ≈ 0.26 moles

Now,

          Molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]

So,

           Volume in dm^3 = [tex]\frac{no. of moles}{molarity}[/tex]

                                       =  0.26 / 0.25

                         Volume  = 1.04 dm^3

Based on the molar mass of the protein, the concentration of the unknown protein is 0.0011 mM (millimolar).

Concentration is the amount of a solute present in a given volume of substance.

Moles of protein = mass/molar mass

molar mass of protein = 118 × 64 = 7552 g/mol

Moles of protein in 8.3 g = 8.3/7552 = 0.0011 moles

Concentration = 0.0011 mole/mL = 0.0011 mM.

Therefore, the concentration of the unknown protein is 0.0011 mM (millimolar).

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Answer:

.546 M

Explanation:

.0142 M / .026 = .546 M

Answer:

+ 47.68 Liter change in volume to final volume 129.68 L

Explanation:

P1V1/T1 = P2V2/T2     RE-ARRANGE TO:

P1V1/T1  * T2/P2  = V2         (T must be in Kelvin)

1.9 * 82 / (273.15 + 32.5)   *  (273.15-15.4)/ (770/760) = 129.68 L

129.68 - 82=47.68 L  change  

Answer:

C

Explanation:its right

The correct structure that corresponds to the name 2,2,3-trichloro-3-fluorohexane is both. Thus option C is correct.

Chemical structure is defined as the physical configuration of atoms within a molecule. The molecular geometry of the molecule is determined by its chemical structure. By illustrating how the atoms and chemical bonds are arranged in space within the molecule, chemical structure can be used to establish the molecular geometry of a product. Chemists can now see a crucial visual depiction of a chemical formula thanks to this.

2,2,3-trichloro-3-fluorohexane structure given is both are correct as one of the structure is trans form and the other is cis form of the structure. Option A is trans form while option B is cis form of structure.

Thus, the correct structure that corresponds to the name 2,2,3-trichloro-3-fluorohexane is both. Thus option C is correct.

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Answer:

1.7

Explanation:

Apply combine gas law

Answer:

second option

O=C-OR

R

Explanation:

ester: A compound most often formed by the condensation of an alcohol and an acid, with elimination of water. It contains the functional group C=O. joined via carbon to another oxygen atom.

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Answer:

Your answer is B, Electrochemistry!

Explanation:

This is the part of chemistry that studies the chemical process in which electrons flow. This flow is called electricity. Electricity is generated by the flow of electrons, from one element to another element. This reaction is called oxidation reduction.

Answer: B

Explanation:

Jenny tells her teacher that most liquids expand when they freeze into solids because the particles in the liquid gain energy is False.

This is the type of matter change which is characterized by a liquid turning into a solid.

The particles lose energy and the molecules move closer to each other which is why False was chosen.

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Answer:

Solvent

Explanation:

Solvent dissolves solute resulting in the formation of a solution.

Answer:

B) Solvent

Explanation:

In forming a solution, the substance which dissolves the solute is called the solvent.

Answer:

17.1 L

Explanation:

P1V1/T1  =  P2V2/T2        T is in K

P1V1/T1 * T2/P2 = V2

735 * 7.31 / (45+273.15)  * (55+ 273.15)/325 = V2

V2 = 17.1 L

The lowest and largest conversion factors are nanoliters and kiloliters, respectively. Among all the given options,  the correct option is option C.

A liquid, solid, or gas's volume is the amount of three-dimensional space it occupies. Although there are many different units that may be used to indicate volume, the most common ones are liters, m³, gallons, milliliters, teaspoons, as well as ounces.

Gases have a volume equal to the internal capacity of the container since they fill their containers to the brim. Containers with a designated volume or one whose interior form is known are frequently used to measure liquids. Measuring cups, graded cylinders, flasks, as well as beakers are a few examples of the tools used to quantify liquid volume.  3.0x10⁻¹²kiloliters represents the greatest volume.

Therefore, the correct option is option C.

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Answer:

= 0.366 M

Explanation:

data;

moles = 0.381 moles

volume = 1039ml

             = 1039 / 1000

             = 1.039dm^3

molarity = ?

solution

         molarity = [tex]\frac{moles}{volume in dm^3}[/tex]

                        = 0.381 / 1.039

         molarity = 0.366 M

Answer:

20,000 centigrams

Explanation:

The name of the carboxylic acid would be 2-methyl-3-ethylheptanoic acid.

Carboxylic acids are named based on the longest carbon chain and the counting starts from the carboxylic acid's functional group.

Thus, in this case, the compound would be a heptanoic acid because the longest chain towards the functional group has 7 carbons.

This means 2 branches exist in the compound. The first one has a single carbon while the second one has 2 carbon atoms. This means they are methyl and ethyl groups respectively.

The branches are located on the second and third carbon on the main chain. Thus the compound's name is 2-methyl-3-ethylheptanoic Acid.

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Answer:

 0.5

Explanation:

mol = mass  : MM SiO₂

mol = 0.0102 : 60 g/mol = 0.00017

molecules = 0.00017 x 6.02 x 10²³ = 1.0234 x 10²⁰

Answer:

D-Petroleum

Explanation:

because it takes millions of years to form petrol and it cannot be renewed again