What is the molar mass for ZnI2?

Answer:

Composition: All hydrocarbons are made up of only two types of atoms: carbon and hydrogen. They are like building blocks that contain carbon and hydrogen stuck together.

Organic Nature: Hydrocarbons are special because they are part of a group of compounds that come from living things or things that were once alive. They have carbon and hydrogen in them, which is what makes them different from other types of compounds.

Explanation:

Answer:

Life in the Han Dynasty (206 BCE - 220 CE) differed significantly from today in family, government, social structure, religion, and trade. For example, the Han Dynasty emphasized a patriarchal family structure, where the eldest male held authority, and filial piety was highly valued. In contrast, contemporary societies embrace more egalitarian family dynamics with shared decision-making.

The government system of the Han Dynasty relied on a centralized bureaucracy and emphasized meritocracy, while modern societies often adopted democratic systems. Socially, the Han Dynasty followed a hierarchical model influenced by Confucian principles, whereas contemporary societies strive for greater equality and social mobility.

Religion in the Han Dynasty combined Confucianism, Taoism, and Buddhism, whereas modern societies exhibit diverse religious beliefs. Lastly, trade in the Han Dynasty thrived along the Silk Road, while modern trade was globally interconnected and facilitated by technological advancements. These differences highlight the evolution of society over time.

Explanation:

The third picture is the answer

Explanation:

there are 2 hydrogen atom 1 oxygen

37.06 percent is the percent of water in the compound

What is Washing Soda ?

Washing soda, also known as sodium carbonate, is a white crystalline powder that is commonly used as a cleaning and laundry aid. It is a strong alkaline substance and has a high pH, making it an effective cleaning agent for removing dirt, grease, and stains. Washing soda is often used as a household cleaner for tasks such as removing grease from ovens and pots and pans, cleaning tile and grout, and unclogging drains. In laundry, it can be used to remove stubborn stains, brighten clothes, and soften hard water. Washing soda can also be used in industrial applications, such as in the manufacture of glass, paper, and soap. It is a water-soluble compound and is generally considered safe for use, although it should be handled with care and not ingested, as it is a strong alkali and can be harmful if ingested in large quantities.

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The enthalpy of the reaction is -164 kJ/mol.

We know that the reaction that occurs between the chromium metal and the acid is an exothermic reaction thus there is an increase in the temperature of the system.

Number of moles of the silver nitrate solution is obtained from;

Volume * concentration

500/1000 L * 0.915 M = 0.46 moles

We can now assume that the density of the solution is 1 g/mL hence the mass of the solution is 500g. Let the specific heat capacity of the solution be 4.18 J/Kg/°C.

Then;

H = mcdT

H = Heat lost in the reaction

m = mass of the solution

c = specific heat capacity

dT = temperature change

H = 500 * 4.12 * ( 55.9 - 19.3)

= 75.4 kJ

The heat of reaction = 75.4 kJ/0.46 moles

= -164 kJ/mol

Let us recall that the negative simply means that heat was lost in the reaction.

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Answer:

ok, here is your answer

Explanation:

i am going to solve this problem by using the ICE table method which is an easy method to determine the pH of a weak base with the given data of the problem.Given:Initial volume of NH3 solution (Vi) = 75.0 mLInitial concentration of NH3 solution (Ci) = 0.200 MInitial moles of NH3 solution (Ni) = Ci x Vi = 0.200 M x 75.0 mL = 0.0150 molesKb = 1.8 x 10^-5Moles of HNO3 added (n) = 0.500 M x 17.0 mL = 0.00850 molesVolume of NH3 solution after the addition of HNO3 (Vf) = 75.0 mL + 17.0 mL = 92.0 mLConcentration of NH3 solution after the addition of HNO3 (Cf) = Ni / Vf = 0.0150 moles / 92.0 mL = 0.163 MTo find the pH after the addition of 17.0 mL of HNO3, we need to use the ICE table method.ICE table method:Initial: NH3 + H2O ⇌ NH4+ + OH-Change: -x 0 +x +xEquilibrium: 0.0150 - x 0 x xKb = [NH4+][OH-] / [NH3]1.8 x 10^-5 = x^2 / 0.163Solving for x, x = 0.00171 M[OH-] = 0.00171 M[OH-] = Kw / [H3O+] = 1.0 x 10^-14 / [H3O+][H3O+] = 5.85 x 10^-12pH = -log[H3O+]pH = -log(5.85 x 10^-12)pH = 11.23Therefore, the pH after the addition of 17.0 mL of HNO3 is approximately 11.23.

The wording of this question is a little weird, however, based on enthalpy and gases, converting from gases to liquids uses MORE energy than it uses to go from a gas to another gas. Depending on your state of matter, the amount of energy needed changes.

Answer:

A. steel spoon

Explanation:

A steel spoon will get hot the quickest from the different given spoon. This is because steel is predominantly made up of a metal which shows metallic properties such as heat conduction.

Other properties originating from metallic bonds are ductility, malleability, luster etc.  

Another way you could collect or determine the pressure data without using a gas pressure sensor involving the same chemical reaction is using the Ideal Gas Equation.

A gas pressure sensor is a device used to monitor and collect data on the pressure changes and variations in a gas participating in a chemical reaction.

In a chemical reaction, the Ideal Gas Equation can be used to determine the pressure data without using a gas pressure sensor if the variables are known.

For example;

The Ideal gas equation can be represented as:

where;

Therefore, we can conclude that the Ideal Gas Equation can be used to determine the pressure data without using a gas pressure sensor if the variables are known.

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Answer:

c. NaOH

Explanation:

just took the quiz

Answer:

A

Explanation:

because on the first alphabet they've been specific of the weather partaking in the area

Answer:

9.91 X 10^-5 or 0.000099 mol

Explanation:

gas = methane
burn with O₂ (oxygen)

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)

Answer:

159.69 g/mol

Explanation:

Here's the answer hope it helps

While being made from natural resources, electricity does not constitute a natural resource because it goes through several procedures to produce it.

Oil, coke, nat gas, metals, stone, or sand are examples of natural resources. Other natural resources include water, soil, sunlight, air, and so on. Natural resources have value because they enable life and provide for human needs.

Financially referred to it as land and raw materials, land resources (also known as natural resources) are found naturally within ecosystems that are mostly unaltered by civilization. A natural resource's biodiversity levels across different habitats are frequently used to describe it.

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Heavy rainfall causes a landslide. Hence, option A is correct.

A landslide is defined as the movement of a mass of rock, debris, or earth down a slope.

Water can trigger landslides and mudslides because it alters the pressure within the slope, which leads to slope instability.

Consequently, the heavy water-laden slope materials (soil, rock, etc.) will succumb to the forces of gravity.

Hence, option A is correct.

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Explanation:

When water is heated from 0°C to 4°C, its volume decreases because its density increases and you can see this effect up to 4°C. Because the density of ice is maximum at 4 °C.

In other words, water heated from 0°C to 4°C, contracts continuously instead of expanding. It means its volume decreases up to 4°C.

Answer:

CO₂ + 4 H₂S + O₂ ---> CH₂O + 4 S + 3 H₂O

Explanation:

The unbalanced equation looks like this:

CO₂ + H₂S + O₂ ---> CH₂O + S + H₂O

Below is the amount of each element on each side of the reaction.

Reactants:

    > 1 carbon, 2 hydrogens, 1 sulfur, 4 oxygens

Products:

    > 1 carbon, 4 hydrogens, 1 sulfur, 2 oxygens

As you can see, there is a differing amount of hydrogens and oxygens on both sides. The balanced equation looks like this:

1 CO₂ + 4 H₂S + 1 O₂ ---> 1 CH₂O + 4 S + 3 H₂O

Below is the amount of each element on each side of the reaction.

Reactants:

    > 1 carbon, 8 hydrogens, 4 sulfurs, 4 oxygens

Products:

    > 1 carbon, 8 hydrogens, 4 sulfurs, 4 oxygens

Answer:

8.3ml of 12M HCl contains 3.646 grams HCl

Explanation:

moles HCl = Molarity X Volume => Volume (Liters) = moles HCl/Molarity

Vol(L) = (3.646g/36.46g/mole)/12M = 0.0083Liter x 1000ml/L = 8.3ml

Photosynthesis is the primary process for which the sun is responsible on earth.

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Answer:

There are 3.011 × 10^23 oxygen atoms

FeCl₃ has a van't Hoff factor of 3.400. -3.858ºC is the freezing point (in °C) of an aqueous solution made with 0.4100 m FeCl₃.

A liquid's freezing point is the temperature at which it turns into a solid. Similar to the melting point, the freezing point often rises with increasing pressure. In the case of combinations and for some organic substances, such as lipids, the freezing point usually below the melting point.

The first solid that forms when a combination freezes often differs in composition from the liquid, and the development of the solid alters the constitution of the remaining water, typically lowering the freezing point gradually.

∆T = i×m×Kf

i = van't Hoff factor = 3.400

m = molality = 0.4100 m

Kf = freezing constant = 1.860º/m

∆T = (3.400)(0.4100)(1.860)

∆T = 3.858º

Freezing point = 0º - 3.858º = -3.858ºC

Therefore, -3.858ºC is the freezing point.

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The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer: Density is a measure

Explanation:  The more squashed together an object’s particles are, the denser it is.

The minimum entropy change of the heat-supplying source is -0.87 kJ/K.

In this case, given the initial conditions, we first use the 10-% quality to compute the initial entropy.

S₁ = 1.485  +  (0.1)(5.6865) = 2.0537 kJ/kg K

The entropy at the final state given the new 40-% quality:

S₂ = 1.4337  +  (0.4)(5.7894) = 3.7495 kJ/kg K

m₁ = 0.026/(0.001057   +  0.1 x 1.002643) = 0.257 kg

m₂ = 0.026/(0.001053   +  0.4 x 1.158347)  = 0.056 kg

ΔS + S₁  - S₂  + S₂m₂  - S₁m₁  -  sfg(m₂  -  m₁)  > 0

ΔS + 2.0537 -  3.7495 + (3.7495 x 0.056)  -   (2.0537 x 0.257)  - 5.6865( 0.056 - 0.257)  >  0

ΔS > -0.87 kJ/K

Thus, the minimum entropy change of the heat-supplying source is -0.87 kJ/K.

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The question is incomplete, the complete question is;

One of the steps in the commercial process for converting ammonia to nitric acid is the conversion of NH3 to NO How many grams of NO and of H20 form? Enter your answers numerically separated by a comma. 4NH3(g) +502(g)------->4NO(g)+6H2O(g)

In a certain experiment, 1.10 g of NH3 reacts with 2.02 g of O2. How many grams of the excess reactant remain after the limiting reactant is completely consumed? Express your answer in grams to three significant figures.

Answer:

Mass of excess ammonia 0.034 g of ammonia

Mass of water formed= 1.37g

Mass of NO formed = 1.50g

Explanation:

The limiting reactant is the reactant that yields the least number of moles of product.

For NH3, molar mass of ammonia = 17g mol-1

Number of moles of ammonia reacted= 1.10g/17 gmol-1 = 0.065 moles of ammonia

According to the reaction equation;

4 moles of ammonia yields 4 moles of NO

Hence 0.065 moles of ammonia will yield 0.065 ×4/4 = 0.065 moles of NO

For oxygen, molar mass of oxygen gas = 32gmol-1

Number of moles of oxygen gas= 2.02g/32gmol-1 = 0.063 moles of oxygen

From the reaction equation;

5 moles of oxygen gas yields 4 moles of NO

0.063 moles of oxygen will yield 0.063 ×4 /5 = 0.050 moles of NO

Hence oxygen is the limiting reactant and ammonia is the excess reactant.

Amount of excess ammonia = Amount of ammonia - amount of oxygen

Amount of excess ammonia= 0.065-0.063= 2×10^-3 moles

Mass of excess ammonia = 2×10^-3 moles × 17 gmol-1 = 0.034 g of ammonia

Mass of NO formed is obtained from the limiting reactant. Since molar mass of is 30gmol-1. Then mass of NO formed = 0.050 moles of NO × 30gmol-1 = 1.50 g of NO

For water;

5 moles of oxygen yields 6 moles of water

Hence 0.063 moles of oxygen yields 0.063 × 6/5 = 0.076 moles of water

Molar mass of water = 18gmol-1

Hence mass of water = 0.076 moles × 18gmol-1 = 1.37g of water

Answer:

A

Explanation:

If 18.93g of H₂O are also produced in the reaction, then  21.04 grams of NO will be produced.

Reaction is such a process that involves transformation of one or more substances into a new substances.

Assuming NH₃  is limiting reagent, let's calculate the amount of NH₃ from the given mass of H₂O produced:

Molar mass of H₂O is 18.015 g/mol;

So, 18.93 g H₂O ÷18.015 g/mol H2O= 1.0515 mol H₂O

As the mole ratio of NH₃  to H2O is 4:6, we can calculate the number of moles of NH₃ :

1.0515 mol H₂O × (4 mol NH₃  / 6 mol H₂O) = 0.701 mol NH₃

0.701 mol NH₃  × (4 mol NO / 4 mol NH₃ ) = 0.701 mol NO

0.701 mol NO × 30.01 g/mol NO = 21.04 g NO

Therefore, 21.04 grams of NO will be produced.

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Answer:5000 i think

Explanation: