20. A compound's empirical formula is C,H,O. If the molecular mass of the compound is
162.2g, what is the molecular formula?
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Answer:

She should expect for the scale to say 145 grams.

Explanation:

Limestone is mostly made up of the mineral calcium carbonate (CaCO3). But if you add an acid, you add hydrogen ions (H+), which will react with the carbonate to form hydrogen carbonate HCO3- ions, which are very soluble in water, and the limestone will dissolve. So, if you add 100+45 you get 145.

Answer: steaks

Explanation:

Answer:

Explanation:

Combustion.  Have fun with that.

Answer:

257.6 grams

Explanation:

first write the formula: 4Fe + 3O2 -> 2Fe2O3

Fe molar mass is 55.8

180/55.8 = 3.226 mols

devide 3.226 by 4, then multiply by 2 which gives us 1.61 mols Fe2O3

Fe2O3 molar mass is 160

1.61 mols * 160 = 257.6 grams

Answer:

om pH

The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog (- pH) Example: What is the hydronium ion concentration in a solution that has a pH of 8.34?

Explanation:

The lower bond energy of the silicanes make them more reactive than the alkanes.

We know that the members of group four has the ability to catenate and this is a property that characterizes all the elements that we can find in the group. However the extent to which the members of the group can be able to catenate is what we use to determine the stability of the bonds.

The alkanes are composed of the bonds that exist between carbon and hydrogen and the alkanes can be able to form very long chains and this can be used to explain the fact that you can be able to find the alkanes in various kinds of applications.

However, the bond energy of the silicanes is less than that of the alkanes hence they tend to be more reactive  then the alkanes.

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In solid carbon dioxide (dry ice), the particles are held together by strong covalent bonds, so they do not move around much.

What is the carbon dioxide?

Carbon dioxide (CO2) is an odorless, colorless gas created through natural processes such as respiration, combustion and the breakdown of organic materials. As a greenhouse gas, it is a major component of the Earth’s atmosphere and plays a critical role in regulating the global climate. Carbon dioxide is made up of one carbon atom and two oxygen atoms, and is produced when fossil fuels such as coal and oil are burned. Plants and trees also use carbon dioxide as part of their photosynthesis process. Carbon dioxide is essential for life on Earth, however, too much of it can have a negative impact on our planet. As human activity has increased over the past century, so too has our production of CO2, resulting in higher concentrations of this gas in the atmosphere and contributing to global warming.

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Based on the formula to determine the freezing point depression of the solvent, the freezing point of the solution is 263.85 K.

The freezing point of a substance is the temperature at which the liquid changes to solid without any further decrease in temperature occurring during the process.

The addition of solute substances in liquids usually lowers the freezing point of the liquid solvent.

The formula to determine the freezing point depression of solvent is given below:

where'

The molality of the given solution = moles of solute/kg of solvent

moles of solute = 46/92

mass of solvent = 100 g or 0.1 kg

Molality of solution = (46/92) / 0.1

Molality of solution = 5

for glycerine, i = 1

ΔT = ΔT = 1 * 1.86 * 5

ΔT = 9.3

The freezing point of the solution = 273.15 - 9.3

The freezing point of the solution = 263.85 K

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According to the ideal gas law, 4.30 molecule of o2 occupies 0.11 m³ at 99.7 kPa with 35.0 °C.

The relationship between a gas's pressure P, volumes V, and t in the range between low pressures and extremely high temperatures, when the gas's water moves virtually independently of one another, is known as the ideal gas, also known as the perfect gas law.

PV = nRTp = pressure in PaV

= volume in m³n = number of molesR

= molar gas constant (8.31 JK⁻¹mol⁻¹)T

= temperature in Kpressure ⇒ 99.7 × 10³ Pa

temperature ⇒ 35.0 + 273 = 308

KpV = nRT

= 99.7×10³×V= 4.30×8.31×308V

=(4.30×8.31×308)/(99.7×10³3 )V

= 0.11 m­³

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Answer:

The key difference between indicator electrode and reference electrode is that indicator electrode responds to changes in the activity of the analyte, whereas reference electrode does not respond to changes, and its response is stable.

Explanation:

The pH value of 500 mL of an aqueous solution of 0.005 mole HCl is 2

We'll begin our calculations by obtaining the molarity of the solution. Details below:

Molarity = mole / volume

Molarity = 0.005 / 0.50

Molarity = 0.01 M

Next, we shall obtain the concentration of the hydrogen ion, H⁺ in the solution. Details below:

HCl(aq) <=> H⁺(aq) + Cl¯(aq)

From the balanced equation above,

1 mole of HCl contains 1 mole of H⁺

Therefore,

0.01 M HCl will also contain 0.01 M H⁺

Thus, the concentration of the hydrogen ion, H⁺ in the solution is 0.01 M

Finally, we shall determine the pH of the solution. Details below:

pH = -Log H⁺

pH = -Log 0.01

pH = 2

Thus, we can conclude that the pH of the solution is 2

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Answer: alkyl halide

Explanation: brianlist please?

Answer:

la respuesta es la letra a

Explanation:

I)reaction between potassium paramagnet with H2 forms MnO2

Answer:

12.18 cc

Explanation:

From the question given above, the following data were obtained:

Density = 1.56 g/cc

Mass = 19 g

Volume =?

The density of a substance can be defined as the mass per unit volume of the substance. Mathematically, it can be expressed as:

Density = mass / volume

With the above formula, we can obtain the volume of the sucrose as follow:

Density = 1.56 g/cc

Mass = 19 g

Volume =?

Density = mass / volume

1.56 = 19 / volume

Cross multiply

1.56 × volume = 19

Divide both side by 1.56

Volume = 19 / 1.56

Volume = 12.18 cc

Therefore, the volume occupied by the sucrose is 12.18 cc

Some examples of molecules that are antigenic may be proteins and or polysaccharides in the cell wall of pathogenic bacteria which may be targeted by the immune system during the production of antibodies.

The relationship between antigens in pathogenic bacteria and antibodies of the immune system is based on the fact that antigens are biomolecules in the pathogens that can be targeted to bond antibodies that are produced by the organism in immune responses against bacteria, viruses, and allergens in the air and foods, etc.

Therefore, with this data, we can see that antigen molecules be any type of biomolecule present in the pathogen and the relationship between antigens in pathogenic bacteria and antibodies of the immune system is based on the binding between them (antigens and antibodies) which is fundamental during certain specific immune responses.

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Answer:

Because fresh water flowing into the estuary is less salty and less dense than water from the ocean, it often floats on top of the heavier seawater. ... For example, a heavy spring rain, or a sustained shift in local winds, can drastically affect the salinity in different parts of an estuary.

Answer:

A bond between 2 atoms as being covalent an electronegativity difference of greater than 1.7 between the atoms.

Bond is a debt instrument, which is issued by governments and corporations. These bonds are used to raise capital for various projects and investments. Bonds are a form of loan and investors are usually paid a fixed interest rate for lending their money. Bonds are typically issued for a fixed period of time, usually for a period of 5-30 years, and have a fixed maturity date. Investors receive interest payments at regular intervals and receive the principal amount of the bond at the end of the period.

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1.3 mol ⋅ L − 1

Molarity=

Moles of solute/ Volume of solution

Answer:

:) Here

Explanation:

Answer:mmhm

Explanation:

mhhm

Answer:

do u want the answer now?

The temperature at which a solid transforms into a liquid at atmospheric pressure is referred to as the liquid’s melting point.

The fact that water boils at a greater temperature than fluorine makes option C the correct choice. The melting point of water is zero degrees Celsius (32 degrees F). Depending on the atmospheric pressure, different amounts of water will boil at different temperatures. When purified water reaches its boiling point at sea level, it does so at 212 degrees Fahrenheit (100 degrees Celsius).

Compared to fluorine, water has a greater boiling point. Regarding the melting and boiling points of water and fluorine molecules, this statement is accurate.

The temperature at which a substance's solid and liquid phases are in equilibrium is known as its melting point. A temperature at which a substance's vapour pressure reaches its boiling point.

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Statement C; They are 0°F and 100°F, respectively, correctly describes the melting and boiling points of water. But Instead of F it should be degree Celsius.

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The lewis structure of NO₃⁻ is trigonal planar and the Lewis structure of ozone (O₃) has a resonance form.

Lewis structures which are also often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.

NO₃⁻ has a trigonal planar Lewis structure. It has one nitrogen atom, three oxygen atoms, and covalent bonds holding the three oxygen atoms together. The sp² hybridization of the nitrogen atom gives NO₃⁻- its trigonal planar structure.

Three oxygen atoms make up the oxygen allotrope known as ozone (O₃). One double bond and one single bond make up the Lewis structure of ozone. Additionally, two oxygen atoms in the Lewis structure of O3 carry charges.

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Answer:

The ion-electron method involves breaking the reactants into their component ions and transferring electrons between the ions to balance the charge and the atoms. In a basic solution, the S²⁰⁸² ion will gain two electrons to form SO₂. The I¹⁻ ion will lose one electron to form I³⁻. The balanced redox equation using the ion-electron method is:

S²⁰⁸² + 2e⁻ + 2OH⁻ → SO₂ + H₂O

I¹⁻ + e⁻ → I³⁻

The overall balanced equation is:

2S²⁰⁸² + 2OH⁻ + I¹⁻ → 2I³⁻ + SO₂ + H₂O

Answer:

Al(OH)3 (s) + 3H+ (aq) → 3H2O (l) + Al3+ (aq)

Explanation:

The net ionic equation for the reaction between solid Al(OH)₃ and aqueous nitric acid, HNO₃ is

The reaction between Al(OH)₃ and HNO₃ will proceeds as follow:

HNO₃ (aq) —> H⁺(aq) + NO₃¯(aq)

HNO₃ (aq) + Al(OH)₃ (s) —>

H⁺(aq) + NO₃¯(aq) + Al(OH)₃ (s) —> H₂O(l) + NO₃¯(aq) + Al³⁺(aq)

Cancel the spectator ion (i.e NO₃¯)

H⁺(aq) + Al(OH)₃ (s) —> H₂O(l) + Al³⁺(aq)

Write 3 before H⁺ and H₂O to obtain the balanced ionic equation as shown below:

3H⁺(aq) + Al(OH)₃ (s) —> 3H₂O(l) + Al³⁺(aq)

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Answer: 0.5

Explanation:

Answer:

The minimum amount of NaOH(aq) solution needed to add is 0.0560 L. This can be calculated by using the following equation:

Moles of Cd2+ = 0.0220 M x 0.300 L = 0.0066 mol

Moles of NaOH = 0.0066 mol x 2 = 0.0132 mol

Volume of NaOH = 0.0132 mol/1.25 M = 0.0560 L

Explanation:

Answer

I'm pretty sure it would be (Insects, and microorganisms)

Explanation:

If its not correct I'm sry

Answer:

it would be Insects, and microorganisms

Explanation:

I finished the quiz minute ago

Answer:

5.4

Explanation:

The lower the pH the more H3o+ ions there are

Answer:

1. mAl₂O₃ = 6.42 g

2. O₂

3. Al.

4. mAl = 1.67 g

Explanation:

Let's calculate the moles of Al and O2 first before doing any other calculations. The molecular weights of Al and O are 26.98 g/mol and 16 g/mol, so the moles are:

moles = mass / Atomic weight or molar mass

moles Al = 4.2 / 26.98 = 0.156 moles

moles O2 = 3 / (2*16) = 0.094 moles

The molar mass of Al2O3 is:

MM = (2 * 26.98) + (3*16) = 101.96 g/mol

With these data, let's determine each part:

1, 2 and 3. Grams of Al2O3, limiting and excess reactant:

To do this, we need to know which is the limiting reactant. this reactant will tell us how many moles are produced of Al2O3 and then, with the previously calculated molar mass, we can determine its mass. Let's see again the overall reaction taking place:

4Al + 3O₂ ---------> 2Al₂O₃

According to this reaction, 4 moles of Al reacts with 3 moles of oxygen, so:

If:            4 moles Al ---------> 3 moles O₂

Then:      0.156 moles ----------> X

X = 0.156 * 3/4 = 0.117 moles of O₂ required.

However, we do not have 0.117 moles of O₂, we have 0.094 moles, therefore we can conclude that the oxygen is the limiting reactant and Aluminum is the excess reactant.

Now, the moles produced of Al₂O₃ will be:

3 moles O₂ -------> 2 moles Al₂O₃

0.094 moles -------> Y

Y = 0.094 * 2/3 = 0.063 moles of Al₂O₃

Finally the mass would be:

mAl₂O₃ = 0.063 * 101.96

4. mass of excess reactant:

The mass of excess reactant would be:

moles Al = 0.156 - 0.094 = 0.062 moles

mAl = 0.062 * 26.98

Hope this helps