Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen iodide

Answer:

broken up into peices

Explanation:

Halogens are p-block elements, group IIA & alkali metal belongs to s-block and nonreactive elements are known as noble gases.

Chemical elements are listed on a periodic table according to their atomic number. Carbon and oxygen are two of the chemical elements listed in the periodic table.

The Periodic Table groups the elements according to their linked chemical and physical properties. The table consists of rows and columns. Vertical columns of the periodic chart represent groups. The table displays periods as horizontal rows.

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The control illustrative or the control group is a name given to a group of samples that are not served with anything. In this experiment.

The control group is the group that is not set for the treatment. For example: “The control group is the plants that were given pure water with no fertilizer.” The experimental group is the group that is slated for the treatment. The plants that do not collect the fertilizer are the control group. An experiment must have a control group. In the control group, nil changed. It is not subjected to the bold variable control group is the group in a study that does not cover the thing being tested and is used as a benchmark to measure the results of the other group and is one of the two groups in any valid experiment.

So we can conclude that  A control group in a scientific experiment is a group part from the rest of the experiment.

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The question is incomplete; the complete question is;

If the pressure of each gas is increased at constant temperature until condensation occurs, which gas will condense at the lowest pressure?

A) Octane

B) Ethane

C) Butane

D) All the gases will condense at the same pressure

Answer:

Octane

Explanation:

If we study the table closely we will realize that octane has the greatest molecular mass among all the gases shown.

The greater the molecular mass, the lower the pressure required for the condensation of the gas. Hence, the lowest pressure is required for the condensation of octane at constant temperature.

The least massive particle is the electron. Hence, the option true is correct.

Sub-atomic particles are tiny particles of matter that together constitute an atom. There are three subatomic particles, which are namely electrons, protons and neutrons.

Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron).

Hence, the option true is correct.

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The empirical formula is CrCl3.

What exactly are empirical formulas?

An empirical formula is a compound's chemical formula that only specifies the ratios of the elements it contains and not the precise number or arrangement of atoms. This would be the compound's element with the lowest whole number ratio.

Ionic compounds occur as crystal lattices containing cations and anions, as opposed to molecules. The empirical formula that identifies the proportion of cations present is already included in the chemical formula used to express an ionic compound like chromium (III) chloride. Each chromium (III) ion contains three chloride ions.

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Answer:

the correct answere to that is q

Answer:

D.

Explanation:

Answer: 90.04°C

Explanation: Calorimeter is a device measures the amount of heat of a chemical or physical process. An ideal calorimeter is one that is well-insulated, i.e., prevent the transfer  of heat between the calorimeter and its surroundings. So, the net heat change inside the calorimeter is zero:

\(q_{1}+q_{2}=0\)

Rearraging, it can be written as

\(q_{1}=-q_{2}\)

showing that the heat gained by Substance 1 is equal to the energy lost by Substance 2.

In our case, water is gaining heat, because its temperature has risen and so, brass is losing energy:

\(q_{water}=-q_{brass}\)

Calculating:

\(m_{w}.c_{w}.\Delta T=-[m_{b}.c_{b}.\Delta T]\)

\(100.4.18.(18.4-15)=-[52.9.0.375.(18.4-T)]\)

Note: final temperature is the same as the substances are in thermal equilibrium.

Solving:

418(3.4)= - 365.01 + 19.8375T

19.8375T = 1786.21

T = 90.04

The initial temperature for the sample of brass was 90.04°.

State of matter of both substance will be liquid at 115C.

A substance-A substance's melting point is 100 degrees Celsius. Thus, liquid material A will arise from temperatures over 100 degrees. Since material A is liquid at 115 degrees Celsius, the particles are free to migrate and glide over one another.

B Substance-It has a  freezing point of 110 degrees Celsius. This signifies that substance B will exist in a liquid condition at any temperature greater than 110 °C. In a liquid condition, the components of solution B will also be sufficiently mobile to travel past one another.

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The planet’s diameter would be approximately the distance across the United States Mercury.

What is planet mercury known for?

Therefore, The planet’s diameter which would be approximately the distance of the United States is Mercury.

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Answer:

Yes!

Explanation:

I think It would be fun!, Going thought space going from planet to planet. once i get back to earth i can make a document about my time in space.

Answer:

Here is your answer......

Answer:

The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out. When you breathe in, the diaphragm moves downward toward the abdomen, and the rib muscles pull the ribs upward and outward.

Explanation:

The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out. When you breathe in, the diaphragm moves downward toward the abdomen, and the rib muscles pull the ribs upward and outward.

The theoretical yield of ammonia is 40.8 grams. Rounded to the tenths place, the answer is 40.8 g.

To determine the theoretical yield of ammonia (NH3), we first need to balance the chemical equation:

N2 + 3H2 → 2NH3

Now we can use the balanced equation to calculate the theoretical yield of NH3. Since we know that 29 L of N2 reacts with 14 g of H2, we need to determine which reactant is limiting and calculate the amount of NH3 that can be formed from that limiting reactant.

First, let's convert the volume of N2 to moles using the ideal gas law:

PV = nRT

n = PV/RT = (1 atm)(29 L)/(0.0821 L·atm/mol·K)(298 K) = 1.2 mol N2

Next, let's convert the mass of H2 to moles:

m = n·M

n = m/M = 14 g / 2.0 g/mol = 7.0 mol H2

Now we can compare the mole ratios of N2 and H2 in the balanced equation to determine which reactant is limiting:

N2:H2 = 1:3

1.2 mol N2 × (3 mol H2/1 mol N2) = 3.6 mol H2

Since we only have 7.0 mol of H2, H2 is not limiting and N2 is limiting. Therefore, we will use the mole ratio between N2 and NH3 to calculate the theoretical yield of NH3:

N2:NH3 = 1:2

1.2 mol N2 × (2 mol NH3/1 mol N2) = 2.4 mol NH3

Finally, we can convert moles of NH3 to grams using the molar mass of NH3:

m = n·M

m = 2.4 mol · 17.0 g/mol = 40.8 g NH3

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Answer:

the correct answer is 12 sides (:

Explanation:

Answer:

1.327 g Ag₂CrO₄

Explanation:

The reaction that takes place is:

First we need to identify the limiting reactant:

We have:

If 4 mmol of K₂CrO₄ were to react completely, it would require (4*2) 8 mmol of AgNO₃. There's more than 8 mmol of AgNO₃ so AgNO₃ is the excess reactant. That makes K₂CrO₄ the limiting reactant.

Now we calculate the mass of Ag₂CrO₄ formed, using the limiting reactant:

The chemical element which magnesium would combine with in order to attain a subscript of 3 is nitrogen which result in the formation magnesium nitride ( Mg₃N₂ )

Magnesium is a metallic element which belongs to group 2 and and has a valence electron of 2. This means that in an electrovalent combination, magnesium loses 2 valence electrons to nitrogen to become Mg2+ ion. To complete this bonding, nitrogen which has 5 valence electrons accepts 3 of Mg2+ ions in addition with with its two N3− ions to form magnesium nitride. When this happens, magnesium then attains a subscript of 3.

Magnesium nitride is an electovalent or ionic compound and the bond which exist in it is Ionic bond. It is used in the synthesis of ceramic substances.

So therefore, we can confirm from above that when magnesium reacts with nitrogen, it attains a subscript of 3.

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Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.

Chemical elements are defined as a type of atom, including the pure substance made entirely of that type, with a specific number of protons in its nucleus.

Magnesium is a metallic element with a valence electron number of 2, and it is a member of group 2. This indicates that magnesium loses two valence electrons to nitrogen in an electrovalent combination to form the Mg2+ ion. Nitrogen, which has five valence electrons, accepts three Mg2+ ions in addition to its two N3 ions to complete this bonding and create magnesium nitride. Magnesium then achieves a subscript of 3 when this occurs.

Thus, Nitrogen is the chemical element that magnesium would mix with to get a subscript of 3, leading to the production of magnesium nitride.

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Answer:

about 0.13 mol

Explanation:

To find number of mols when given grams you first have to find the molar mass of the compound. This is done by adding up the atomic masses of the element in the compound. So Sr= 88 g/mol S=32 g/mol and O=16 g/mol. Then 88+32+(16x4)=184. Then using this you can convert from grams to mols by dividing the grams by the molar mass. So, 24.23/184 equals about 0.13 mol.

Answer:

I think it's the second one.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of gas = 500 mL

density = 0.88 g/mL

We have

mass = 0.88 × 500

We have the final answer as

Hope this helps you

Answer:

your answer is flammability

Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.

the supraspinatus muscle is the most commonly injured muscle in this situation because it is responsible for initiating shoulder abduction, which is an important movement in the throwing motion.

The solution are as follows :-

1.Sarah's mother most likely strained her trapezius muscle. The trapezius muscle is a large triangular-shaped muscle that runs along the upper back and neck and is responsible for moving the shoulder blades and supporting the arms. When picking up a heavy object such as a baby, the trapezius muscle is activated, and if the muscle is strained or overused, it can cause sharp pain between the shoulder blades. The fact that Sarah's mother experiences this pain only when picking up her baby suggests that the weight of the baby is causing the strain.

2.The most likely type of injury to the baseball pitcher is a rotator cuff injury. The rotator cuff is a group of muscles and tendons that surround the shoulder joint and are responsible for stabilizing and moving the shoulder. Pitchers are at high risk for rotator cuff injuries due to the repetitive and forceful motion of throwing a baseball. The specific muscles that are most likely involved in a rotator cuff injury are the supraspinatus, infraspinatus, teres minor, and subscapularis muscles. However, the supraspinatus muscle is the most commonly injured muscle in this situation because it is responsible for initiating shoulder abduction, which is an important movement in the throwing motion.

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Answer:When a single compound breaks down into two or more compounds or elements in a chemical reaction then it is known as decomposition reaction.

The chemical symbol for sodium carbonate is .

The decomposition of sodium carbonate is:

The decomposition of sodium bicarbonate,  will result in the formation of sodium oxide,  and carbon dioxide, .

Hence, carbon dioxide,  will produce with sodium oxide,  on decomposition of .

Explanation:Na2CO3 Na2O +CO2   CO2 is the answer

The beta decay of lead-211 can be represented by the nuclear equation ^211Pb → ^211Bi + β^- + ν¯, where ^211Pb represents the lead-211 nucleus, ^211Bi represents the bismuth-211 nucleus, β^- represents the electron emitted, and ν¯ represents the antineutrino emitted.

The beta decay of lead-211 can be represented by the following nuclear equation:

^211Pb → ^211Bi + β^- + ν¯

In this equation, a beta particle (β^-) and an antineutrino (ν¯) are emitted from the nucleus of lead-211 (^211Pb), resulting in the formation of bismuth-211 (^211Bi).

Beta decay is a type of radioactive decay in which a nucleus emits a beta particle and an antineutrino or a positron and a neutrino. In the case of lead-211, it undergoes beta minus (β^-) decay, which means that a neutron in the nucleus is converted into a proton, and an electron (β^-) and an antineutrino (ν¯) are emitted.

Lead-211 has 82 protons and 129 neutrons in its nucleus. During beta decay, one of the neutrons in the nucleus is converted into a proton. This increases the atomic number of the nucleus by 1, resulting in the formation of bismuth-211, which has 83 protons and 128 neutrons.

The electron (β^-) emitted during beta decay is produced in the nucleus when a neutron breaks down into a proton, an electron, and an antineutrino. The electron is ejected from the nucleus at high speed due to the conversion of a neutron into a proton and must carry away the energy and momentum difference.

The antineutrino (ν¯) is a subatomic particle that is emitted from the nucleus during beta decay. It has no electrical charge, very little mass, and interacts very weakly with matter. The antineutrino carries away energy and momentum and helps to ensure that the total energy and momentum of the system are conserved during the decay process.

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The formula for lithium hydrogen phosphate is Li2HPO4.

What is lithium hydrogen phosphate (Li2HPO4)?

Lithium hydrogen phosphate (Li2HPO4) is a chemical compound that contains the elements lithium, hydrogen, phosphorus, and oxygen. It is an ionic compound and a salt of phosphoric acid.

Lithium hydrogen phosphate is commonly used in the production of lithium-ion batteries and as a source of lithium ions in chemical reactions. It is also used in the synthesis of various other lithium compounds. In addition, lithium hydrogen phosphate has potential applications in the field of biomedical engineering as a material for bone tissue engineering and drug delivery.

What is an ionic compound?

An ionic compound is a type of chemical compound formed by the combination of positively charged ions (called cations) and negatively charged ions (called anions) through electrostatic attraction. The cations and anions are held together by ionic bonds, which are formed by the transfer of electrons from the cation to the anion. Ionic compounds are typically solids at room temperature and have high melting and boiling points. Examples of ionic compounds include sodium chloride (NaCl), magnesium oxide (MgO), and calcium carbonate (CaCO3).

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