What do these two changes have in common baking cookies and using polish to remove tarnish from a silver spoon?

Hello there! Here are the answers you're looking for!

1: displacement reaction

2: (I can't really answer this one for you because i don't know what the items you used in your lab were, But ill just say Highly Toxic Chemicals)

3: a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.

4: (same thing here, i don't know what your lab was about! So i cant answer how it was used here.)

Sorry, i could not answer 2 of them, But hopefully, you get a good grade! Hope this helps!!

Answer:

(a) Cr3+ and Br- will form CrBr3 (chromium(III) bromide)

(b) Fe3+ and O2- will form Fe2O3 (iron(III) oxide)

(c) Hg22+ and CO32- will form Hg2CO3 (mercury(I) carbonate)

(d) Ca2+ and ClO3- will form Ca(ClO3)2 (calcium chlorate)

(e) NH4+ and PO43- will form (NH4)3PO4 (ammonium phosphate)

Explanation:

chatGPT

The chemical formulas for the compounds formed by the given pairs of ions are: (a) CrBr3, (b) Fe2O3, (c) Hg2(CO3)2, (d) Ca(ClO3)2, and (e) (NH4)3PO4.

(a) Cr3+ and Br- : In order to form a neutral compound, the charges of the ions must balance. The charge of Cr3+ is 3+ and the charge of Br- is 1-. To balance the charges, we need three Br- ions for every Cr3+ ion. Therefore, the chemical formula is CrBr3.

(b) Fe3+ and O2- : The charge of Fe3+ is 3+ and the charge of O2- is 2-. To balance the charges, we need two O2- ions for every Fe3+ ion. Therefore, the chemical formula is Fe2O3.

(c) Hg22+ and CO2- : The charge of Hg22+ is 2+ and the charge of CO2- is 2-. The charges are already balanced, so no extra ions are needed. Therefore, the chemical formula is Hg2(CO3)2.

(d) Ca2+ and ClO3- : The charge of Ca2+ is 2+ and the charge of ClO3- is 1-. To balance the charges, we need two ClO3- ions for every Ca2+ ion. Therefore, the chemical formula is Ca(ClO3)2.

(e) NH4+ and PO3- : The charge of NH4+ is 1+ and the charge of PO3- is 3-. To balance the charges, we need three NH4+ ions for every PO3- ion. Therefore, the chemical formula is (NH4)3PO4.

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Answer:

I think it's B

Explanation:

Oceans and Seas and the Water Cycle Completed. The oceans are, by far, the largest storehouse of water on earth — over 96% of all of Earth's water exists in the oceans. Not only do the oceans provide evaporated water to the water cycle, they also allow water to move all around the globe as ocean currents.

Good luck!

Explanation:

Refer to pic..........

Answer:

water density

Explanation:

These deep-ocean currents are driven by differences in the water's density, which is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation

your welcome!

The purpose of this lab was to explore the concept of percent yield and to determine how it can be affected during experimentation. We learned that percent yield is the ratio of the actual yield of a product.

Ratio is a mathematical comparison of two related values or quantities. It is expressed as a fractional relationship, such as "2 to 4," "1:4," or "2/4." In mathematics, ratios are used to make comparisons between two or more quantities. Ratios can be used to measure how one quantity is related to another, or to compare two or more items. For example, if a person weighs 120 pounds and their height is 5 feet, the ratio of their weight to their height is 120:5 or 24:1. Ratios can also be used to compare items in different categories, such as the number of people in a group to the number of cars they own, or the number of apples to oranges in a basket.

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The bubble's volume upon rising near the top of aquarium where the pressure is 1.01 atm and temperature is 116°C is 0.869 mL

Volume of gas can be defined as the space occupied by gaseous particles at standard temperature and pressure conditions.

As we know, (P₁V₁)/T1 = (P₂ V₂)/ T₂

P₁, V₁, and T₁ are initial pressure, volume, and temperature, and P₂, V₂, and T₂ are final pressure, volume, and temperature.

T₁ = 12°C + 273.15 = 285.15 K

T₂ = 116°C + 273.15 = 389.15 K

(P₁V₁) /T₁ = (P₂V₂)/T₂

(1.54 atm × 0.650 mL) / 285.15 K = (1.01 atm × V₂) / 389.15 K

So, V₂ = (1.54 atm × 0.650 mL × 389.15 K) / (1.01 atm × 285.15 K)

V₂ = 0.869 mL

Therefore, the bubble's volume upon rising near the top of the aquarium where the pressure is 1.01 atm and the temperature is 116°C is 0.869 mL

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When something gets cold, it absorbs energy in the form of cold energy from its environment. This energy is released as heat when the object is heated up again.

Energy is the ability to do work. It is the capacity to cause change, move objects, and make things happen. Energy can come from different sources, such as the sun, fossil fuels, and nuclear power. Energy can also be stored, such as in batteries, food, or chemical compounds. It is a fundamental part of the universe, and it is necessary for life to exist. Energy can take many forms, such as kinetic, potential, thermal, chemical, electromagnetic, and nuclear energy. Kinetic energy is energy that is in motion, such as a moving car or a flying bird. Potential energy is energy stored in an object due to its position or composition, such as a rock at the top of a hill. Thermal energy is the energy of heat, such as the heat from a fire.

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Answer:

The molecular formula is Sn3(PO4)4.

Explanation:

The molecular formulas are:

Na2SO4: Sodium sulfate

C6H5Cl: Chlorobenzene

N2O4: Dinitrogen tetroxide

Sn3(PO4)4: Tin(IV) phosphate

These are all chemical compounds represented by their molecular formulas.

The complete and balanced reaction equation is: CuSO3(s) -> CuO(s) + SO2(g)

The reaction between HCI (hydrochloric acid) and CuSO3 (copper(II) sulfite) is not a valid chemical equation.

Copper(II) sulfite is not a stable compound, and it decomposes readily in air to form copper(II) oxide (CuO) and sulfur dioxide (SO2) according to the following equation:

CuSO3(s) -> CuO(s) + SO2(g)

The balanced equation for this reaction is: https://brainly.com/question/14258973

CuSO3(s) -> CuO(s) + SO2(g)

The gas formed in this reaction is sulfur dioxide (SO2).

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6 mol of KClO3 will produce 288 grams of O2, when 6 mol of KClO3 decomposes.

How to calculate mass of O2 for this problem?

The balanced chemical equation for KClO3 decomposition is:

2 KClO3 →

2 KCl + 3 O2

According to the equation, 2 moles of KClO3 produce 3 moles of O2.

Therefore, 6 moles of KClO3 will produce (6/2) x 3 = 9 moles of O2.

To calculate the mass of O2 produced, we need to use the molar mass of O2, which is approximately 32 g/mol.

So, the mass of O2 produced will be:

mass = number of moles x (molar mass)

mass = 9 mol x 32 g/mol

mass = 288 g

Therefore, 6 mol of KClO3 will produce 288 grams of O2.

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At chemical equilibrium, the partial pressure of the three gases is 0.265 atmospheres.

Chemical equilibrium is defined as the condition which arises during the course of a reversible chemical reaction with no net change in amount of reactants and products.A reversible chemical reaction is the one wherein the products as soon as they are formed react together to produce back the reactants.

At equilibrium, the two opposing reactions which take place take place at equal rates and there is no net change in amount of the substances which are involved in the chemical reaction.At equilibrium, the reaction is considered to be complete . Conditions which are required for equilibrium are given by quantitative formulation.

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The amount of heat transferred would be 1269.67 J.

To calculate the heat transferred (q), we can use the specific heat capacity (c) of aluminum, which is 0.903 J/g°C, the mass of aluminum (m), and the change in temperature (ΔT):

q = m x c x ΔT

where ΔT = (final temperature - initial temperature)

Substituting the given values, we get:

ΔT = 71.6°C - 32.5°C = 39.1°C

m = 36.4 g

c = 0.903 J/g°C

q = 36.4 g x 0.903 J/g°C x 39.1°C

q = 1269.67 J

Therefore, the heat transferred when the temperature of 36.4g of aluminum is raised from 32.5°C to 71.6°C is 1269.67 J.

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The mass of water reacted is 17.67g.

STP stands for standard temperature and pressure. STP refers to a specific pressure and temperature used to report on the properties of matter.

According to IUPAC( International Union of Pure and Applied Chemistry), it is defined as -

It is generally needed to test and compare physical and chemical processes where temperature and pressure plays an important role as they keep on varying from one place to another.

One mole of a gas under STP conditions occupies a volume of 22.4L.

Given,

Volume of oxygen = 11L

Since 1 mole of a gas occupies 22.4 L of volume at STP.

Moles of oxygen produced = 11 ÷ 22.4

                                              = 0.49 moles

From the reaction,

1 mole of oxygen is produced by 2 moles of water.

Thus, 0.49 moles of oxygen is produced by 0.49 × 2 moles of water

So, moles of water = 0.98 moles

mass = moles × molar mass

          = 0.98 × 18

            = 17.67g

Therefore, mass of water reacted is 17.67g.

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Aluminum sulfate is very non-toxic, having acute and chronic oral LD50 values above 5,000mg/kg (5). Alum, on the other hand, can cause irritation, burns, and breathing problems.

What is Aluminium sulfate used for?

Aluminum sulfate is a crystalline (sand-like) solid that is odorless, white or colorless. It is utilized in sewage treatment, water purification, paper production, and leather tanning. Aluminum sulfate is also known as alum or papermaker's alum; however, the term "alum" refers to any double sulfate salt having the general formula XAl(SO4)212H2O, where X is a monovalent cation such as potassium or ammonium (5).

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Answer:

At STP (Standard Temperature and Pressure), the temperature is 273.15 K (0°C) and the pressure is 1 atm. The molar volume of any gas at STP is 22.4 L/mol.

Explanation:

Therefore, the volume of 225 moles of gas at STP would be:

V = n * V_m

where

V = volume of the gas

n = number of moles of the gas

V_m = molar volume of the gas at STP = 22.4 L/mol

Substituting the values, we get:

V = 225 mol * 22.4 L/mol

V = 5040 L

So the volume of 225 moles of a gas at STP would be 5040 liters.

Answer:

5049 L

Explanation:

got the answer correct

Silver nitrate, sodium hydroxide, ammonium chloride, and potassium iodide (KI, AgNO3, NH4Cl) (NaOH).

One of your blood's electrolytes is chloride. Chloride blood tests verify that you have the right amounts of chloride within your blood for good health. Chloride levels in the blood can be abnormal for a variety of reasons, including dehydration, vomiting, and certain medical diseases.

A measurement of a chloride concentration is the blood chloride value. Specifically, the number of milliequivalents of chloride per liter. Hypochloremia, then, is a condition in which your blood chloride concentration is below normal. Hyperchloremia is the medical term for having excessive levels of chloride within your blood.

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The doctor would then be aware of Greg's weight of 108.6 kg.

Typically, you won't be allowed to eat or drink for six hours prior to the procedure, although you can drink water. Moreover, you should refrain from intense activity for 24 hours before to your consultation. It's wise to dress comfortably and loosely.

The internal organs and tissues of your body are depicted in great detail by a CT scan. A PET scan can be more sensitive than other imaging procedures and can detect aberrant activity. Also, it can cause your body to alter sooner. PET-CT scans are used by doctors to reveal more details about the cancer.

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Answer:

gram of Ni = 79.8g

Explanation:

Mark as brainliest

Answer:

1.yes

2.invasive species are_ accidentally transported to a new ecosystem

3.false

4.increase

5.

6.fencing

sorry I don't know the fifth one but I hope it helpful

The 25 is the new volume of this gas at 5 degrees Celcius and 2 atm.

What is temperature ?

Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).

What is volume ?

Space is occupied by every three-dimensional object. Its volume serves as a gauge for this area. The area contained by an object's limits in three-dimensional space is referred to as its volume. Another name for it is an object's capacity.

Therefore, 25 is the new volume of this gas at 5 degrees Celcius and 2 atm.

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The solar energy is a massive source of energy which can generate electricity and reduce the global warming emissions. But the set up of solar panels have both positives and negatives.

The manufacturing process of solar panels requires hazardous chemicals and materials for cleaning the semiconductors. The chemicals include hydrofluoric acid, sulfuric acid, etc.

In addition to the release of these chemicals, the solar panel manufactures inhale silicon dust which threatens the public health. The solar energy systems require a large area of land which can lead to the loss of wildlife habitats.

The construction of solar panels also affect soil compaction and erosion.

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Answer:

Oxygen 17 isotope with neutral charge

Explanation:

The atom has 8 red protons and 8 black electrons so it is neutral. Since it has 8 protons, it has atomic number of 8, which is oxygen (O).

There are 9 blue neutrons. The mass number = #protons + #neutron = 8 + 9 = 17. Therefore it is the oxygen 17 isotope.

1) It would be a supercritical fluid

2) The approximate rate constant is 0.5 Ms-1

3) Can not be deduced from the graph alone

4) The threshold energy is A

5) rate = k[A]^2 [B]^2

A supercritical fluid is a substance that is heated and pressurized to a point where it exists in a state that is intermediate between a gas and a liquid. This state is known as the supercritical state.

Supercritical fluids have properties of both gases and liquids. Like gases, they can expand to fill their containers, but like liquids, they have a high density and can dissolve other substances. In the supercritical state, the fluid has a higher density and viscosity than a gas, but a lower density and viscosity than a liquid.

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The formula for ammonium dichromate is (NH4)2Cr2O7. The number of atoms in this compound is 36 .

What is atom?

An atom is the basic unit of matter. It is the smallest particle of an element that retains the chemical properties of that element. Atoms are made up of three types of particles: protons, neutrons, and electrons. Protons and neutrons are located in the nucleus of the atom, while electrons orbit around the nucleus in shells or energy levels. The number of protons in an atom's nucleus determines the element it represents. Atoms can combine with other atoms to form molecules, which make up all the matter in the universe. The study of atoms and their behavior is known as atomic physics or atomic chemistry.

The formula for ammonium dichromate is (NH4)2Cr2O7. To count the number of atoms in this compound, we need to first determine the number of atoms for each element present in the compound and then multiply those values by their respective coefficients:

There are 2 nitrogen atoms (N) for each ammonium ion, so there are a total of 2 x 2 = 4 nitrogen atoms.

There are 8 hydrogen atoms (H) for each ammonium ion, so there are a total of 8 x 2 = 16 hydrogen atoms.

There are 2 chromium atoms (Cr) in the compound.

There are 7 oxygen atoms (O) for each dichromate ion, so there are a total of 7 x 2 = 14 oxygen atoms.

Therefore, the total number of atoms in (NH4)2Cr2O7 is:

4 nitrogen atoms + 16 hydrogen atoms + 2 chromium atoms + 14 oxygen atoms = 36 atoms

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From the balanced chemical equation:

2CuFeS2 + 5O2 → 2Cu + 2FeO + 4SO2

We can see that for every 5 moles of oxygen (O2) that react, 4 moles of sulfur dioxide (SO2) are produced. Therefore, we can use a proportion to calculate the number of moles of O2 required to produce 12 moles of SO2:

5 moles O2 : 4 moles SO2 = x moles O2 : 12 moles SO2

Cross-multiplying, we get:

5 moles O2 x 12 moles SO2 = 4 moles SO2 x (x moles O2)

60 = 4x

x = 15

Therefore, 15 moles of O2 are required to generate 12 moles of SO2 gas.

Answer:

15 was right on acellus

Explanation:

The equilibrium shifts in the direction that  tends to oppose the change done.

Chemical equilibrium is the state of a system in which the rate of the forward reaction is equal to the rate of the reverse reaction.

Chemical equilibrium is a dynamic process. The forward and reverse reactions continue to occur even after equilibrium has been reached. However, because the rates of the reactions are the same, there is no change in the relative concentrations of reactants and products for a reaction that is at equilibrium.

The equilibrium reaction is given as -

                                 2 CO + O₂ ⇒ 2CO₂

ΔH = negative

This means that the forward reaction is exothermic.

Addition of oxygen shifts the equilibrium towards the product side.

When the temperature is increased the backward reaction will be favored and the equilibrium will be shifted towards the reactant side.

Cooling below 100⁰C results into shifting the equilibrium towards product side.

Adding a catalyst does not alter the direction of equilibrium.

Doubling the pressure would shift the equilibrium towards product side.

Adding a base to absorb CO₂ would shifts the equilibrium towards the product side.

Therefore, The equilibrium shifts in the direction that  tends to oppose the change done.

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Answer :Adding of oxygen shifts the equilibrium to the right side which is the product side.

increasing of the temperature will shift the equilibrium to the left side which is the reactant side

cooling below 100c will shift the equilibrium to the right side which is the product side

Adding a catalyst does not affect the chemical equilibrium

Doubling the pressure would shift the equilibrium to the right side which is the product side

Adding a base to absorb CO2 would shift the equilibrium to the product side

Explanation:

0.0025 moles correspond to 1.56 × 10²¹ atoms of sodium.

The mole is an amount unit similar to familiar units like pair, dozen, gross, etc. It provides a specific measure of the number of atoms or molecules in a bulk sample of matter.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Given,

Atoms of sodium = 1.56 × 10²¹ atoms

we know that,

1 mole = 6.023 × 10²³ atoms

Number of moles of sodium = number of atoms ÷ 6.023 × 10²³

                                               = 1.56 × 10²¹ atoms ÷ 6.023 × 10²³

                                                = 0.0025 moles of sodium

Therefore,  0.0025 moles correspond to 1.56 × 10²¹ atoms of sodium.

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To solve this problem, we need to use the molar mass of copper and the stoichiometry of the balanced equation to determine how much chalcopyrite is needed to produce 400 g of pure copper.

The molar mass of copper is 63.55 g/mol, which means that 1 mole of copper contains 63.55 grams of copper. Using this information, we can convert 400 g of copper to moles:

400 g Cu x (1 mol Cu/ 63.55 g Cu) = 6.292 mol Cu

From the balanced equation of the reaction, we know that 1 mole of chalcopyrite (CuFeS2) produces 1 mole of copper. Therefore, we need to mine the same number of moles of chalcopyrite as the number of moles of copper required.

To determine the number of moles of chalcopyrite needed, we can use the molar mass of chalcopyrite:

Molar mass of CuFeS2 = (1 x atomic mass of Cu) + (1 x atomic mass of Fe) + (2 x atomic mass of S)

= (1 x 63.55 g/mol) + (1 x 55.85 g/mol) + (2 x 32.06 g/mol)

= 183.53 g/mol

Now we can convert the moles of copper to moles of chalcopyrite:

6.292 mol CuFeS2 x (183.53 g CuFeS2/ 1 mol CuFeS2) = 1154.4 g or 1.1544 kg of CuFeS2

Therefore, we need to mine 1.1544 kg of chalcopyrite to obtain 400 g of pure copper.