Moles to mass
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15 pts

The statement that best predicts and explains the product of a single displacement reaction is ;   ( C ) A3B2 is the predicted formula with an overall charge of the compound being zero and each atom has 8 valence electrons in their outermost electron shell.

Given that the oxidation number is +2 shows that it will be an octet when it donates its 2 electrons. also for octet B it will become complete when it accepts 3 electrons. Therefore in order to balance out the octet of each atom is by cross multiplying to get A3B2.

Hence we can conclude that The statement that best predicts and explains the product of a single displacement reaction is ;  A3B2 is the predicted formula with an overall charge of the compound being zero and each atom has 8 valence electrons in their outermost electron shell.

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Answer:

Specific heat is an intensive property (like density, color, etc.) that does not depend on the amount of a substance present. This allows substances to be identified using their specific heat. Imagine an unknown metal of known mass is heated to a known temperature.

Explanation:

Answer:

c. chemical and physical

Answer:

look the image

Explanation:

Answer:

A. They repel more strongly than the bonding pairs, pushing the bonding pairs closer together.

Explanation:

Lone pairs are in simple terms just pairs of electrons on the atom. Negative does not attract negative so it repels from the bonds. I put it in the most simple terms possible. Like with magnets north and north don't attract. Same concept

2.9 L of oxygen are required to react with 5.8 L of hydrogen at STP to form water.

Hydrogen gas and oxygen gas combines in a molar volume ratio of 2 : 1 to form water.

The equation of the reaction is given as follows:

Thus, twice the volume of hydrogen is required with a given volume of oxygen to form water.

If 5.8 L of hydrogen is available for reaction at STP, the volume of oxygen required all be half of 5.8 L.

Volume of oxygen required = 5.8 / 2 = 2.9 L

Therefore, 2.9 L of oxygen are required to react with 5.8 L of hydrogen at STP to form water.

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Soil nutrients are minerals which are required for growth either small or relatively large quantities

Soil minerals are the metallic and non-metallic nutrients found in the soil which are required by plants for growth.

Based on plants requirements, the major nutrients are nitrogen, phosphorus and potassium.

Plants also require other nutrients like copper, zinc, sulfur, iron, etc., in smaller quantities.

Based on the results of the soil test:

The deficiencies and excesses can be corrected by selectively reducing the application of the excess soil nutrients and addition of the deficient nutrients.

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We have already been introduced to solutions. Several chapters ago molarity (M) was introduced. Molarity is measured in moles per liter, or mol/L. A 0.30 M NaCl solution means that there is 0.30 mol NaCl in every liter of solution.

Often chemists have to make solutions; so, doing the calculations necessary to make a certain amount of solution become second nature.

For example:

Make 250 mL of a 0.30 M NaCl solution.

To make the solution we need to calculate the amount of NaCl to dissolve to make 250 mL of solution.

start with 250 mL

The solution is made by adding 4.38 g NaCl to a 250-mL volumetric flask. About 100 mL of water are added and when all the NaCl dissolves water is added up to the line on the volumetric flask.

But molarity is not the only unit we use; so, we need to be able to convert between different units...

Common units of concentration include

<==> <==><==>

% wt.

% vol

molarity (M)

molality (m)

mol fraction

That is, the mol fraction of "a" is the number of moles of "a" present divided by the total number of moles of material in the solution (including the solvent).

There is no simple formula for converting from one concentration unit to the next. In general the first step is to pick a convenient sample size. Then work to change each part of the concentration unit to the new unit. Do not try to do the conversion all at once.

For example,

HCl comes in bottles marked 37 % HCl by weight. The density of the solution is 1.200 g/cm-1. What is the molarity of the solution?

A conveneint sample size is 100 g of solution; convenient because 100 g x 37% = 37 g HCl.

This is the key...you must know the definitions for all the concentration terms

First, convert number of grams of HCl in your sample to number of moles in your sample (the 100 g of solution).

Second, convert g of solution to L of solution.

Third, divide moles by liters and you have molarity.

What is the molality of this solution?

Going from M to m. Since the concentration is in M a convenient sample size is 1 L.

OK, so the first conversion is not a conversion...there are 12 mol HCl present in 1 L of solution.

The second conversion is not as easy as it first appears. Let's use the density of the solution to perform a conversion from volume to mass.

This is NOT the mass that is used in molality. We just determined the mass of the solution; molality uses the mass of the SOLVENT!

The solution is made of a solvent and a solute. So, the mass of solvent can be found by subtracting the mass of the solute from the mass of the solution.

The electronegativity of carbon is about 2.5 , and that of oxygen is about 3.5 , and naturally, (3.5−2.5=1.0)>0 . So, the electronegativity difference is greater for a C−O single bond than a F−F single bond.

Answer:

1.0

I hope my answer helps you.

Answer:

0.56 M

Explanation:

We are given;

Mass of glucose solute is 50.50 g

Volume of solution is 500 mL

We are required to calculate the concentration of glucose.

We need to know that, molarity is the concentration of a solution in moles per liter.

Molarity = Number of moles ÷ Molar mass

Answer:

2.5 M

Explanation:

.625 M / .250 Liter   = 2.5 M

Acid Base reaction (Neutralization reaction)

it is the reaction between acid and base which neutralize each other to give salt and water.

example: Hydrochloric acid + Sodium hydroxide --------> sodium chloride + water

HCl + NaOH--------> NaCl + H2O

Answer:

A. True

Explanation:

A metallic bond is a type of chemical bond formed between positively charged atoms in which the free electrons are shared among a lattice of cations. In contrast, covalent and ionic bonds form between two discrete atoms. Metallic bonding is the main type of chemical bond that forms between metal atoms.

Answer:

covalent

Explanation:

It is between two nonmetals so it is covalent. It would be ionic if it were between a metal and a nonmetal.

Carbon tetrachloride, CCl₄ is a colorless organic compound with a sweet smell and is used as a refrigeration fluid. The covalent bonding is seen in the carbon tetrachloride compound.

Covalent bonding is the chemical interaction that has been constituted of electron sharing between the atoms of the elements in the molecule or the compound.

This type of chemical bonding is seen when the difference between the electronegativities between the elemental atom is very small to initiate the electron transfer.

In carbon tetrachloride, carbon has 4 valence electrons whereas chlorine has 1 valence electron in its outer shells. The four Cl shares their electrons with the carbon atom to complete their octet.

Therefore, carbon tetrachloride shows covalent bonding.

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Answer:

Coal

Explanation:

Coal is derived from ancient plant life and thus consists largely of organic compounds.

The example of the organic portion of the Earth’s outer layers is coal.

The earth is made up of many layer which are very important for human life and our planet earth.

The earth is basically made up of three different layers.

There are basically five layers of earth atmosphere.

Thus, the example of the organic portion of the Earth’s outer layers is coal.

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Answer:

compound

Explanation:

because h is hydrogen, then O is oxygen

Based on the potential ligands given, C2O42- and CO32- can form a maximum of two bonds to a metal

ion.

Ligands are ion or molecule that binds to a central metal atom to form a coordination complex.

Ligands are essential in many biological and enzyme complexes.

From the potential ligands given;

Therefore, the potential ligands, C2O42- and CO32- can form a maximum of two bonds to a metal

ion.

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The amount, in grams, of [tex]CO_2[/tex] that would be produced from the burning of 3.0 mol amyl alcohol would be 660.15 grams

From the equation of the reaction:

[tex]2C_5H_1_1OH + 15O2 ---- > 10CO_2 + 12H_2O[/tex]

The mole ratio of amyl alcohol to the  [tex]CO_2[/tex] produced is 2:10.

Thus, for 3.0 mol of amyl alcohol, 15 mol of  [tex]CO_2[/tex] would be produced.

Mass of 15 mol  [tex]CO_2[/tex] = 15 x 44.01 = 660.15 grams

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The solution to the polynomial expression since the power of the variable is in the second degree is 6.29 × 10² cm

The power of a variable refers to the exponent of the variable and the highest power of a variable is the degree to which the variable is being raised. From the information given, the highest power of the variable is a polynomial.

Given that:

[tex]\mathbf{= 2.150 \times 10^2 \ cm + 7.34 \times 10^2 \ cm - 3.2 \times 10^2 \ cm }[/tex]

So, since the exponents are in the same power we are going to add them all together multiplied by their exponent.

i.e.

[tex]\mathbf{= (2.150 + 7.34 - 3.2) \times 10^2\ cm }[/tex]

[tex]\mathbf{= 6.29 \times 10^2\ cm }[/tex]

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Answer:

71.58%

Explanation:

Find the Mr of C₁₇H₁₉NO₃ :

(12 × 17) + 19 + 14 + (16 × 3) = 285

Mr of carbon in C₁₇H₁₉NO₃ :

12 × 17 = 204

Percent by mass of carbon = [tex]\frac{204}{285}[/tex] × 100 = 71.58%

try stopping putting the car in park before fixing

Answer:

.12 M

Explanation:

.15 M / L  * .125 L = .01875 Moles

now add 30 ml for total  155 ml = .155 L

.01875 M / .155 L = .12 M

if you observe a first quarter on January 3, the date will you see a full moon is on February 1st.

The lunar phase during which the Moon is completely illuminated from Earth's perspective is known as the full moon. When Earth is situated halfway between the Sun and the Moon, this happens. This indicates that the near side of the moon, which faces Earth, is fully illuminated by the sun and appears as a roughly circular disk.

The Moon is a symbol for both the emotional and physical bodies. The full Moon is a time to be open and receive the spirit's light and awareness into your physical, emotional, and mental bodies

It takes 29 day, to get to the full moon. This will be:

= January 3 + 29 days

= February 1st

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Answer:

its the 1st one at the top

Answer:

[tex] \\ [/tex]

refer the three attached images for the respective answers.

hope helpful ~

Answer:

Answer C

Explanation:

Chemical Bonds