What is the molecular mass of Br 2?

Answer:

The empirical formula is Ag2O.

The empirical formula is Ag2O.Explanation:

The empirical formula is Ag2O.Explanation:The empirical formula is the simplest whole-number ratio of atoms in a compound.

The empirical formula is Ag2O.Explanation:The empirical formula is the simplest whole-number ratio of atoms in a compound.The ratio of atoms is the same as the ratio of moles. So our job is to calculate the molar ratio of Ag to 2O.

do the steps ...

To get this into an integer ratio, we divide both numbers by the smaller value.

From this point on, I like to summarize the calculations in a table.

ElementAgMass/gXMolesXllRatiomllIntegers

—————————————————−———mAgXXXm7.96Xm0.07377Xll2.00mmm2

mlOXXXXl0.59mm0.0369Xml1mmmml1

There are 2 mol of Ag for 1 mol of O.

Answer:

Hello There!!

Explanation:

The answer is↬The empirical formula is Ag2O. It is the simplest whole-number ratio of atoms in a compound.

hope this helps,have a great day!!

~Pinky~

The excess reactant in the preparation of pizza from the given materials is tomato sauce; option B

In a chemical reaction, the excess reactant is the reactant that is left over at the end of the reaction.

The excess reactant is present in a quantity greater than the mole ratio of the reactant to form a product.

Considering the given reaction and the mole ratio of the reaction:

Recipe for  1 pizza =  1 crust, 1 scoop of tomato sauce, 0.5 cups of shredded mozzarella cheese, and 9 slices of pepperoni.

Amount present =  2 crusts, 4 scoops of tomato sauce, 1 cup of cheese, and 9 slices of pepperoni.

Excess reactant = tomato sauce.

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Answer:

Cheese

Explanation:

Did the lab

Name of Pb(NO3 )2 is Lead(II) nitrate.

Pb(NO3)2 is ionic as well as covalent

Pb is the symbol of lead and NO3  is a complex ion called nitrate. It has one nitrogen and three oxygens. Pb(NO3)2 is ionic as well as covalent. NO3 is covalent in nature because both nitrogen and oxygen are non-metals and therefore an ionic bond cannot be formed between them.

Ionic compounds are formed when a metal reacts with a nonmetal whereas covalent compounds are formed when two non -metals react with each other. Binary compounds containing hydrogen are usually covalent compounds as hydrogen is a non - metal.

An ionic bond  donates an electron to the other atom in the bond whereas electrons in a covalent bond are shared equally between the atoms.

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While that sounds frightening, some estimates place the cooling of the Earth's core at tens of billions of years, or as much as 91 billion years. That is a very long time, and the Sun will most likely burn out much sooner than the core in around 5 billion years.

This heat is responsible for plate tectonics and parts of the rock cycle. The geological processes that transform the three major rock types (igneous, metamorphic, and sedimentary) from one to the other.

The internal heat of the Earth is critical for processes that result in the transformation of one rock type to another.

Thus, yes, we need to worry about Earth's heat running out

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The empirical formula for the compound is Ca(OH)₂.

To determine the empirical formula of the compound, we need to find the simplest whole-number ratio of the elements present. We can do this by calculating the number of moles of each element and then finding the ratio between them.

Mass of calcium (Ca) = 13.5 grams

Mass of oxygen (O) = 10.8 grams

Mass of hydrogen (H) = 0.675 grams

First, we need to convert the masses of each element to moles using their respective atomic masses.

Atomic mass of Ca = 40.08 g/mol

Atomic mass of O = 16.00 g/mol

Atomic mass of H = 1.01 g/mol

Number of moles of Ca = 13.5 g / 40.08 g/mol = 0.3367 mol

Number of moles of O = 10.8 g / 16.00 g/mol = 0.675 mol

Number of moles of H = 0.675 g / 1.01 g/mol = 0.6693 mol

Next, we need to find the simplest whole-number ratio by dividing the number of moles of each element by the smallest number of moles obtained.

Dividing by 0.3367 (smallest value):

Number of moles of Ca = 0.3367 mol / 0.3367 mol = 1

Number of moles of O = 0.675 mol / 0.3367 mol = 2.005

Number of moles of H = 0.6693 mol / 0.3367 mol = 1.988

Rounding these values to the nearest whole number, we have:

Number of moles of Ca = 1

Number of moles of O = 2

Number of moles of H = 2

Thus, the empirical formula of the compound is Ca(OH)₂.

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When a student needs more of a hazardous material, the recommended procedure is to follow proper safety protocols and guidelines, including consulting with the instructor or supervisor.

Handling hazardous materials requires careful consideration of safety measures to minimize the risks involved. In this situation, the student should first consult with their instructor or supervisor to communicate their need for more of the hazardous material. The instructor or supervisor can provide guidance on the appropriate procedures to follow, including assessing the necessity for the material and ensuring that the student has the necessary training and knowledge to handle it safely.

It is crucial to understand the risks associated with the hazardous material and follow all safety guidelines and protocols. This may include wearing appropriate personal protective equipment (PPE), working in a well-ventilated area, and using proper storage and disposal methods.

Furthermore, it is important to adhere to any legal requirements or regulations regarding the procurement and handling of hazardous materials. This may involve obtaining the necessary permits or licenses, ensuring compliance with safety standards, and maintaining proper documentation.

By following these recommended procedures, students can ensure their safety and the safety of others while obtaining the required amount of hazardous materials.

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answer

C) is the answer ⟵(๑¯◡¯๑)

In the original sample of substance X, there are 12 molecules and each molecule is made of 2 small red spheres and one blue sphere in the middle.

Change 1 has the same total number of red and blue spheres as the original sample, but the structure of molecules has changed. As a result, this is a chemical change.

In Change 2, the structure of molecules is changed. Some molecules contain solely red spheres, whereas others include both red and blue spheres. Furthermore, the total number of molecules is greater than the number of molecules in the original sample. This violates the principle of conservation of mass.  Hence, this is an impossible change since extra matter was created in this change.

In Change 3,  the number of the molecules and the structure of the molecules is same as the orignial sample. Hence, it is a physical change.

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The food substance which gives energy for humans are the carbohydrates.

It follows that among the classes of food substances, the group of food or diet which has the highest calories supply of energy are the carbohydrates. These carbohydrates are the energy giving food.

Aside carbohydrates, other food classes include the following:

The proteins helps in building the body. The vitamins are the body regulating and protecting food.

So therefore, we can now deduce that when we consume foods such as rice, maize and others forms of carbohydrates, it gives us energy.

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Answer:

Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g)

The ketone that can be shown by the description have been shown in the image attached.

A strong analytical method known as mass spectrometry can reveal important details about the make-up, structure, and characteristics of molecules. It enables researchers to pinpoint and examine a sample's chemical and isotopic features.

The mass of a molecule or an ion can be precisely determined using mass spectrometry. The mass-to-charge ratio (m/z) measurement enables the recognition and verification of a compound's molecular formula. Particularly relevant to the study of pharmaceutical analysis, biochemistry, and organic chemistry.

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The name of the most abundant isotope of antmanium is not provided in the question. Therefore, the most abundant isotope would have an atomic mass close to the given number, which is 444.

The number written below the symbol of antmanium (444.41) is likely its atomic mass, which is the sum of the masses of all its isotopes. However, the information about the isotopes provided in the question does not include the names or masses of the individual isotopes, only that there are four isotopes and one is 90% abundant. Without knowing the individual masses or names of the isotopes, we cannot determine which is the most abundant.

To name isotopes, we combine the element's name with its atomic mass number (the sum of protons and neutrons in the nucleus). In this case, the element is antmanium, and the atomic mass number is 444, so the isotope's name is Antmanium-444.

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Answer:  D- average change in plant height, divided by, the number of days.

(i had to look up the test you were talking about to find what the answer choices were.)

Hope this helps!

The partial pressure in atm of O2 is 0.47 atm

What do you mean by moles?

A mole is simply a unit of measurement. In fact, it's one of the seven base units in the International System of Units (SI). Units are invented when existing units are inadequate. Chemical reactions often take place at levels where using grams wouldn't make sense, yet using absolute numbers of atoms/molecules/ions would be confusing, too. So, scientists invented the mole to bridge the gap between very small and very large numbers.

No. of moles of Rn = 0.220 moles

No. of moles of O2 = 0.350 moles

No. of moles of Ar = 0.640 moles

Total no. of moles = 1.21 moles

Mole fraction of O2 , xO2 = 0.350moles  / 1.21 moles = 0.289

Total pressure = 1.65 atm

Partial Pressure of O2 = Mole fraction of O2* Total Pressure

                                    = 0.289 * 1.65 atm

                                    = 0.47 atm

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Answer:

Look up at the atom on the periodic table of elements and find out what its atomic mass is. Subtract the number of protons from the atomic mass. This is the number of neutrons that the regular version of the atom has. If the number of neutrons in the given atom is different, than it is an isotope.

Chlorine in group 17 in the periodic table and includes halogens (also fluorine, bromine, and iodine)

Electron configuration of Cl : [Ne] 3s² 3p⁵

From this configuration, it can be seen that to obtain stability like the noble gas Ar - [Ne] 3s² 3p⁶, Chlorine will need one more electron so that its configuration is the same as Ar( become anion-Cl⁻)

Then it is said that Cl is reactive

And the Cl element is included in the non-metal group because it attracts electrons (electronegative)

The elements that include non-metals are halogens, noble gases, and 7 elements H, C, N, O, P, S, Se.

Answer:

0.5km/hr

Explanation:

\(500.0 \div 1000\)

this is because to get from n to KM you have to divide by 1000

The theoretical and percent yield of potassium hydroxide would be 19.771 g and 75.83% respectively.

The balanced chemical equation for the reaction between water vapor and potassium superoxide is:

4 KO2 + 2 H2O → 4 KOH + 3 O2

From the balanced equation, we can see that for every 4 moles of KO2 reacted, 4 moles of KOH are produced.

Calculate the number of moles of KO2 used:

25.0 g KO2 × (1 mol KO2 / 71.098 g KO2) = 0.3520 mol KO2

Calculate the number of moles of KOH produced:

According to the balanced equation, 4 moles of KO2 produce 4 moles of KOH, so:

0.3520 mol KO2 × (4 mol KOH / 4 mol KO2) = 0.3520 mol KOH

Calculate the theoretical yield of KOH:

The molar mass of KOH is 56.105 g/mol, so:

0.3520 mol KOH × 56.105 g KOH/mol = 19.771 g KOH

Therefore, the theoretical yield of KOH is 19.771 g.

Calculate the percent yield of KOH:

The actual yield of KOH is given as 15.0 g, so:

Percent yield = (actual yield / theoretical yield) × 100%

Percent yield = (15.0 g / 19.771 g) × 100%

Percent yield = 75.83%

Therefore, the percent yield of KOH is 75.83%.

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Answer:

0.241 M

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

HBr + NaOH —> NaBr + H₂O

From the balanced equation above,

The mole ratio of acid, HBr (nₐ) = 1

The mole ratio of base, NaOH (n₆) = 1

Finally, we shall determine the concentration of the NaOH solution. This can be obtained as follow:

Volume of base, NaOH (V₆) = 20 mL

Volume of acid, HBr (Vₐ) = 24.1 mL

Concentration of acid, HBr (Cₐ) = 0.2 M

Concentration of base, NaOH (C₆) =?

CₐVₐ / C₆V₆ = nₐ/n₆

0.2 × 24.1 / C₆ × 20 = 1/1

4.82 / C₆ × 20 = 1

Cross multiply

C₆ × 20 = 4.82

Divide both side by 20

C₆ = 4.82 / 20

C₆ = 0.241 M

Therefore, the concentration of the NaOH solution is 0.241 M

Chlorofluorocarbons (CFCs) are not naturally occurring greenhouse gases.

Chlorofluorocarbons (CFCs) are not naturally occurring greenhouse gases. They are synthetic compounds that were widely used in refrigerants, solvents, and aerosol propellants.

CFCs were found to deplete the ozone layer in the upper atmosphere, leading to the adoption of the Montreal Protocol to phase out their use.

While they are not naturally occurring, they contribute significantly to global warming due to their strong greenhouse effect.

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The shortest covalent bond is the H-F bond. Therefore, option (A) is correct.

The electronegativity decreases down the group and the Fluorine is the most electronegative atom in the periodic table. The size of the atoms also increases as we go down the group.

The bond length of the hydrogen halides will follow the order HF < HCl < HBr < HI. The radius of the Iodine atom is the largest and to form a molecule, the hydrogen atom will be farthest as compared to all hydrogen halides.

The molecule with Fluorine will have the shortest bond length because its atom has the smallest size, making them attach very closely. So the covalent bond of hydrogen fluoride will be the shortest.

The relationship between bond length and bond strength is inverse in nature. The bond length of HI is the greatest, it will have the least bond strength. So the order for bond strength of the hydrogen halides is  HF > HCl > HBr > HI.

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Answer:299,800,000

Explain: The speed of light is 3.00x108m/s and in mph is 6.708 x 108.

Answer:

i think its going to be liquid

Explanation:

Chemical bonding explains the properties of chemical and biological polymers by forming strong covalent bonds or flexible hydrogen bonds, which give the polymer its unique characteristics.

Chemical bonding is a fundamental concept that explains the properties of chemical and biological polymers. Chemical bonds are formed when atoms interact with each other to form molecules or particles. In a polymer, the atoms are linked together in a repeating pattern, forming a long chain. These bonds give the polymer its unique properties, such as strength, flexibility, and the ability to interact with other molecules. The type of chemical bond formed between the atoms will determine the properties of the polymer.

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True, the metric system is now known as the international system of units.

A system of measurement in which the basic units are the meter, the second, and the kilogram.

The Metric System is also known as The International System of Units. The metric system is called that because it is the system that the vast majority of countries in the world currently use.

The only countries that do not use this system are Liberia, Myanmar, and the United States, although schools in the United States are working to teach students both variations.

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