Well i still kinda don't get the differences of climate and weather.so what i need help with is what are the differences of climate and weather?

Safety rules are the regulatory actions that need to be followed to prevent any danger. Following all safety instructions in laboratory text or by assistant does not apply in an organic chemistry lab. Thus, option D is correct.

Laboratory safety rules are the guidelines that are supposed to be followed by the person working in the laboratory while performing the experiments. While working in the organic chemistry lab one should never remove the equipment.

One should wear safety goggles and should not perform the experiments in absence of a teaching assistant. But it is not necessary to follow all the rules in the laboratory textbook.

Therefore, in option D. all rules of the information textbook are not necessary to be followed.

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Taking into account the definition of density, the density of the pen is 1.8523 g/mL.

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space and it is a quantity that allows to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume.

In this case, you know that:

Replacing in the definition of density:

density= mass of the pen÷ volume of the pen

density= 24.08 g÷ 13 mL

Solving:

density= 1.8523 g/mL

In summary, the density of the pen is 1.8523 g/mL.

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Mass is an extensive property of a matter which describes the number of particles in a matter. According to the law of conservation of mass "mass can neither be created nor be destroyed." Hence mass is a quantity which never changes whether a particle is in a solid, liquid or gaseous state.

The density of the gold colored metal beads if mass is 425 g and volume of 47.5mL is 8.9 g/mL.

Density is defined as the ratio of the Mass of the substance to the volume of the substance.

It's SI unit is kg/m3.

It is denoted by ρ or rho.

Density = mass/volume

From the given data, we noticed that,

Mass of gold colored metal beads = 425g

Volume of the gold colored metal beads = 47.5mL.

By substituting all the value, we get

= 425/47.5

= 8.9

Thus, we concluded that the density of the gold colored metal beads if mass is 425 g and volume of 47.5mL is 8.9 g/mL.

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In the bicarbonate buffering system, carbon dioxide and water join to form carbonic acid, which dissociates into hydrogen and bicarbonate.

Bicarbonate is an excellent buffering system because this compound can bind free hydrogen ions (H+) and thus the system avoids sudden changes in the pH of a solution.

In conclusion, in the bicarbonate buffering system, carbon dioxide and water join to form carbonic acid, which dissociates into hydrogen and bicarbonate.

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Freon-12 or dichlorodifluoromethane is a common refrigerant and propellant. 5.69 mg of Freon-12 contains 2.8 × 10¹⁹ molecules and the mass of Cl in Freon-12 is 0.94049 gm.

Freon-12 (CCl₂F₂) is a gas that was used in manufacturing propellants and refrigerants. It is a non-inflammable gas also called dichlorodifluoromethane.

Molar mass of CCl₂F₂ = 1 × 12g/mol + 2 × 35.5g/mol + 2 × 19g/mol = 121g/mol

Molecules in 5.69 mg Freon-12 are calculated as:

5.69 mg × 0.001 gm × 1 mol × 6.02 × 10²³ molecules ÷ 121 gm = 0.0002830 × 10²³ molecules = 2.8 × 10¹⁹ molecules

There are two chlorine atoms in a Freon-12 compound so the mass is calculated as:

(5.69 × 0.001 × 2) ÷ 121 =  0.94049 gm of Cl

Therefore, 0.94049 gm of Cl is present in Freon -12.

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Your question is incomplete, but most probably your full question was, that Freon-12 (CCl₂F₂) is used as a refrigerant in air conditioners and as a propellant in aerosol cans. Calculate the number of molecules of Freon-12 in 5.69 mg of Freon-12. What is the mass of chlorine in 5.69 mg of Freon-12?

On the basis of the law of conservation of matter, the missing coefficient for water is 6 in the process of cellular respiration. Thus, the correct option is 1.

It is possible to define cellular respiration as a chemical process that results in the breakdown of food inside the cell and the release of ATP, which is a type of energy.

It entails the chain of chemical processes through which organic materials are oxidized to provide energy to living things.

The left side of the equation has 6 molecules. The equation must be balanced so it must be 6 for the coefficient of water.

C₆H₁₂O₆

Thus, the correct option is 1. six, 6.

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The question is incomplete. Your most probably complete question is given below:

1. 6

2. 8

3. 4

4. 2

Polar term describes the distribution of charges in a water molecule

In water molecule polar charges are seen and polar means a molecule that has a charge on one side of the molecule that is not cancelled out it has a region of partial charge one end is slightly positive and one end is slightly negative they are generally asymmetric that's why the geometry of water is bent and with an uneven distribution of the electron in the water molecule hydrogen is positive and hydroxide is negative means H⁺OH⁻ that's why water is polar molecule

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The molecular formula of the compound having an empirical formula BH₃ and a molar mass of 27.6 g/mol is B₂H₆.

Empirical formula is the whole number ratio of the atoms which are present in the compound.

Molecular formula is the number of atoms of each element present in one molecule of compound.

Given -

Empirical formula = BH₃

Molar mass = 27.6 g/mol

We must find the empirical mass of the compound,

Molar mass of B = 10.8 amu

Molar mass of H = 1.00  amu

Therefore,

Empirical mass = 10.8 amu + (3 x 1.00) amu = 13.8 amu

To find molecular formula, we divide the molecular mass by the empirical mass. So,

Molecular formula = Molecular mass

                                  Empirical mass

Molecular formula = 27.6

                                  13.8

Molecular formula = 2

Hence, the molecular formula of the compound is BH₃ = B₁ₓ₂H₃ₓ₂ = B₂H₆

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move double bond add line pairs to Oxygen and make negative then move a double bond into the hexagon

The more the volume of the substance less dense will be the substance. The sample of liquid aluminum with a density of 2.7 g/cm³ has a volume of 1.62 cm³.

The volume has been the space that is in inverse relation to the density of the substance and gets increased with less dense substances while decreasing with more dense substances.

Given,

Mass of aluminum = 4.39 gm

Density of aluminium = 2.7 g/cm³

The volume of Al is calculated as:

Volume = Mass ÷ Density

V = 4.39 ÷ 2.7

= 1.62 cm³

Therefore, the volume of liquid aluminum is 1.62 cm³.

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When gases in two different containers are same , at same temperature, and same pressure then the number of moles must also be same.

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The ksp value for calcium hydroxide at this temperature is 5.20 × 10⁻⁶.

Ksp is an equilibrium constant of a solid substance dissolved in a liquid solution.

Given that, the volume of water is 0.178 l, 0.264 g of Ca(OH)² dissolves in enough water

The solution equilibrium is

Ca(OH)² = Ca + 2OH

The molar solubility is

0.186 / 74.00  / 0.230 = 0.0109 M

The ksp value will be

Ksp = (s) (2S)²

Putting the values in the formula

(0.0109) x (2 x 0.0109)² = 5.20 × 10⁻⁶.

Thus, the ksp value for calcium hydroxide is 5.20 × 10⁻⁶.

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Answer: The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.

Explanation:

Answer:

Water is H2O which is a compound and would therefore not be on the periodic table. The periodic table only consists of elements.

Elements in group 2 have a charge of +2 while forming ionic compounds.

While forming ionic compounds , elements of group 2 loose 2 electrons from their valence shell as a result of which charge of +2 is generated on them as electrons are negatively charged.

As like all the other periodic trends, charge also varies across the periodic table. On moving down the group, as  number of valence electrons do not change as a result of which charge too does not change along a group.

But, while moving across a period as electrons are added to the same shell the number of valence electrons no longer remains same rather it increases and so does the charge.

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The temperature of the gas is 133.42 kelvin.

Assuming that the gas in the question is ideal, we can apply the ideal gas equation which is as follows:

PV = nRT

Here P is the pressure of the gas = 1.20 atm

V is the volume of the gas = 31.00 liters

N is the number of moles = 3.40 moles

R is the universal gas constant = 0.0821 L atm

T is the temperature of the gas =?

Putting the values in the above equation:

1.20 x 31.00 = 3.40 x 0.0821 x T

T = 1.20 x 31/3.40 x 0.0821

T = 133.42 K

Thus, the temperature of the gas is 133.42 kelvin.

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Answer:

Hello How are you

Explanation: the answer might be Screenshot

Answer: Wire gauze is an essential piece of supporting equipment in a laboratory as glassware cannot be heated directly with the flame of a Bunsen burner, and requires the use of wire gauze to diffuse the heat, helping to protect the glassware.

Explanation:

The empirical formula of iron oxide is Fe2O3 and its name is ferric oxide.

Given:

Solution:

Now, calculate the relative mass of iron in iron oxide = Percentage of iron by mass / At. mass of iron

Relative mass of iron = 70/55.85 = 1.25

Relative mass of oxygen = Percentage of oxygen by mass / At. mass of iron = 30/55.85 = 1.88

Now the calculate the molar ratio of iron to oxygen = 1.25 : 1.88 = 2:3

Thus, the empirical formula of iron oxide is Fe2O3 and its name is ferric oxide.

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The way in which the separation methods for homogeneous and heterogeneous mixtures are compared is as follows: a homogeneous mixture could be separated through distillation, while a heterogeneous mixture could be separated through filtration (option B).

A homogeneous mixture is a type of mixture that is uniform throughout, and has only one phase.

A heterogeneous mixture is that which is separated into different regions or phases that have different compositions or properties.

Both homogeneous and heterogeneous mixtures can easily be separated by physical means, however, since homogeneous mixtures are even in composition, they can be separated by distillation.

Therefore, the way in which the separation methods for homogeneous and heterogeneous mixtures are compared is as follows: a homogeneous mixture could be separated through distillation, while a heterogeneous mixture could be separated through filtration.

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Answer:

A homogeneous mixture can be separated physically, while a heterogeneous mixture can be separated chemically.

Explanation:

Concentration refers to the amount of substance present.

The term concentration refers to the amount of substance present. There are many units that could be used for concentration of a solution. This makes reference easy.

To express the concentration in milligram per liter;

45/1000/1 L = 0.045 mg/L

To express the concentration in molarity;

Number of moles = mass/molar mass = 45.00 g /106 g/mol = 0.42 moles

Molarity = 0.42 moles/1 L = 0.42 M

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Answer:

Amino acids, nucleic acids, and nucleobases are key biological nitrogen compounds.

Explanation:

Answer:

amines and amides

Explanation:

If we are talking organic/biochemistry only I would say amines and amides

1,63760 money she make from the gold and volume of gold take 5.295 volume is the amount of space occupied by a substance

Here given data is kristen was arrested for stealing 6.532 tons and then She escaped capture for 2.45 days and then she had already hid some of the gold, but had 2.34 tons of gold still with her

We have to find how much money did she have if 2.34 tons of gold still with her = ? and how volume does gold take up = ?

Volume is the amount of 3D space a substance or object occupies

We have to convert 2.34 tons into money

Then  2.34 tons =  1,63760 money

And the formula to find volume is:

volume = mass/density

Mass of gold = 196.96 and density = 18.31

Volume = mass of gold / density

Volume = 196.96 / 18.31

Volume = 5.295

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The aluminum sulfate stock solution should the chemist pour out is 219.8 ml

Complete Question

A chemist must prepare 400 mL of 1.00M aqueous aluminum sulfate working solution. He'll do this by pouring out 1.82 mol/L aqueous aluminum sulfate stock solution into a graduated cylinder and diluting it with distilled water. How many mL of the aluminum sulfate stock solution should the chemist pour out?

The aluminum sulfate stock solution should the chemist pour out is 219.8 ml

Given:

V1 = 400ml, M1 = 1 M, V2 = ?, M2 = 1.82 M

Hence, the relation between molarity and volume is as follows.

M1V1 = M2V2

1.00M x 400ml = 1.82 x V2

V₂ = 219.8 ml

Thus, we can conclude that 219.8 ml of the aluminum sulfate stock solution should the chemist pour out.

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The correct answer is Nitrogen.

From the given question the electronic configuration of the element is given as:

1s²2s²2p³

hence, we know that the maximum no of electrons in the sub-shell

s= 2

p=6

while in this p has only 6 electrons.

Thus by counting the number of electrons in each sub-shell we can know the atomic number as several electrons in an atom is equal to the atomic number of the atom.

thus, the no of electrons present is- 2+2+3= 7

For, 7 electrons the element present will be nitrogen with atomic number 7.

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The equilibrium constant of the second reaction is 2.0 * 10^-3.

Let us recall the the equilibrium constant shows the extent to which reactants are converted into products in a reaction. A large positive value of the equilibrium constant shows that most of the reactants is converted into products.

Now we can see that the second reaction is obtained when the first reaction is halved and inverted. This now means that we can write;

K2 = 1/K1^1/2

K2 = 1/√K1

K2 = 1/(2.5 * 10^5)

K2 = 2.0 * 10^-3

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All of the given procedures are used to reduce the amount of acid rain in the environment except using leaded gasoline in automobiles; option D.

Acid rain refers to the condition in which oxide gases of non-metals released from combustion of fossil fuels dissolve in rain water to form acids which is then called acid rain.

Acid rain is mainly formed when sulfur oxides and nitrogen oxides released  from combustion of fuels dissolve in rainwater.

Acid rain results in polluted water an also affects the organisms found in the environment.

Some  procedures used to reduce the amount of acid rain in the environment include:

Therefore, using leaded gasoline in automobiles will not reduce the amount of acid rain in the environment.

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