aluminum reacts with 42g of iron(ii) sulfate. How many grams of iron are formed?

Hazard signs such as "Flammable," "Oxidizer," and "Corrosive" National Fire Protection Association (NFPA) diamond Gas Cylinder sign posted signs convey information about chemical storage.

Pictograms are pictorial symbols that are used to express particular information about a chemical's risks. OSHA mandates pictograms on principal labels to indicate chemical dangers. The exact OSHA danger categorization determines each pictogram(s). There are several forms of risks in the workplace, including chemical, ergonomic, physical, and psychological hazards, to mention a few. Dangerous situations. Employees who operate with machinery or on construction sites are more likely to be exposed to safety concerns.  Biological dangers. Biological dangers are exceedingly hazardous  Physical dangers Ergonomic risks Chemical risks Workload risks.

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Answer: C: Sodium donates an electron to chlorine.

Explanation:

Sodium wants to lose an electron and chlorine wants to gain an electron to become stable. This is because of their place in the periodic table, sodium being on the very left edge and chlorine on the very right (noble gasses dont count as they are stable to begin with)

Therefore sodium will donate to chlorine so they both become stable with an ionic bond. (another way to tell its ionic is the very large difference in electronegativity)

When table salt forms, sodium donates an electron to chlorine resulting in the formation of bond which is formed when the electronic configurations become stable.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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The elements fluorine (F), chlorine (CL),and Iodine are all parts of the same _group___ on the periodic table

Answer:

Light bulbs

Explanation:

light waves are electromagnetic waves which can travel through a vacuum

The factors for dissolving sugar.

Warmth or Fahrenheit minus 0.2 ranges Celsius dissolves the sugar in water. because of sugar's soluble nature, it's miles present at any temperature or stress in liquid water. about 10 mins for this.

Sugar dissolves quicker in hot water than it does in bloodless water due to the fact warm water has extra strength than bloodless water. whilst water is heated, the molecules benefit energy and, therefore, pass quicker. As they flow faster, they come into contact with the sugar more often, inflicting them to dissolve more quickly.

The dissolution of sugar in water is a bodily change because it no longer brings about the formation of a new substance. it's miles a reversible alternative as sugar and water may be extracted and returned from the solution through the method of crystallization observed by evaporation.

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Answer:

A

Explanation:

the sun gives energy to the grass to grow then the animal eats the grass and gets the energy and then the decomposer or mushroom will break it down for food.

Answer:

2.047 × 10^22 atoms.

Explanation:

To calculate the number of atoms (nA) in AlCl3, we first need to find the number of moles in the compound, AlCl3.

Molar mass of AlCl3 = 27 + 35.5(3)

= 27 + 106.5

= 133.5g/mol

Using mole = mass/molar mass

mole = 4.5/133.5

mole = 0.034moles

number of atoms in a substance (nA) = number of moles (n) × Avagadros number or constant (6.02 × 10^23 atoms)

nA of AlCl3 = 0.034 × 6.02 × 10^23

nA = 0.2047 × 10^23

nA = 2.047 × 10^22 atoms.

Answer:

C

Explanation:

The following changes affect the value of the equilibrium constant for a gas-phase exothermic reaction:

Addition of a catalyst-  Increase equilibrium constant

Decrease in the temperature - Decrease equilibrium constant

Removal of a product- No effect on equilibrium constant

Decrease in the volume- Decrease equilibrium constant

Removal of a reactant- Decrease equilibrium constant

Define  exothermic process

An exothermic process in thermodynamics is a thermodynamic process or reaction that releases energy from the system to its surroundings, typically in the form of heat but occasionally in the form of light (such as a spark, flame, or flash), electricity (such as from a battery), or sound (such as the explosion produced by the burning of hydrogen).

The relationship between a reaction's products and reactants with regard to a certain unit is expressed by the equilibrium constant, K. The equilibrium constant is temperature-dependent and unaffected by the precise ratios of reactants to products, the presence of a catalyst, or the presence of inert substances. Additionally, it is unaffected by the volumes, pressures, and concentrations of the reactants and products.

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Answer:

Explanation:

given mass on earth =98 kg

gravitational pull on mars =3.711 m/s2

gravitational pull on venus =8.87 m/s2

weight of the body on mars =weight on earth/9.81 m/s2 *3.711 m/s2

W=98 kg*3.711 /9.81m/s2

W=37.07 kg

weight on the venus =weight on earth*8.87 m/s2 /9.81 m/s2

W= 98 kg*7.87 m/s2/9.81 m/s2

W=78.62 kg

Explanation:

the equation is yes a the line of jointing line passing the ball to is

The two most abundant gases in our atmosphere are nitrogen (N2) and oxygen (O2).The atmosphere is a layer of gases that surrounds the Earth and is held in place by gravity.

The gases in the atmosphere are divided into layers based on their densities, and the lowest layer is closest to the Earth's surface. The atmosphere is mostly composed of nitrogen and oxygen, which make up around 99 percent of the total volume of gases present in the atmosphere. Other gases like carbon dioxide, water vapor, argon, and neon are present in much smaller quantities.

The atmosphere has different roles in the Earth's system, such as regulating the climate, filtering out harmful solar radiation, and providing the necessary gases for life forms to breathe. The atmosphere's composition and structure have changed over time, due to various factors, including natural processes and human activities.

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Answer:

6 Cl atoms

Explanation:

In one molecule of ZnCl2, we have 2 atoms of Cl

Therefore, in 3 molecules of ZnCl2, we'll have 3(2) atoms of Cl = 6 atoms of Cl.

please mark brainliest

Atoms transfer or share electrons to obtain octet (option C).

Octet rule in chemistry refers to a rule stating that atoms lose, gain, or share electrons in order to have a full valence shell of 8 electrons.

Hydrogen is excluded from this rule because it can hold a maximum of 2 electrons in its valence shell.

During chemical reactions, atoms of elements combine with other atoms and lose, gain or share their electrons so as to obtain this octet state of electrons.

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Answer:

noo

Explanation:

no it aint sorry hunn

The volume of the solution that we are looking for in the problem is 0.06 moles

A stock solution refers to a concentrated solution of a substance that is prepared with the intention of diluting it to obtain lower concentrations for various applications.

From part A;

Number of moles of luminol = 20g/177 g/mol

= 0.11 moles

Molarity =  0.11 moles * 1000/75 L

= 1.45 M

From part B;

Number of moles = Concentration * volume

= 0.03 M * 2L

= 0.06 moles

From part C;

Volume = Number of moles /Concentration

= 0.06 moles/1.45 M

= 0.04 L or 40 mL

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Benzyl alcohol and benzoic acid can partition between ether and a NaOH solution because of differences in their solubilities in these two solvents and their acid-base properties.

Benzyl alcohol is more soluble in ether than in water or NaOH solution. Benzoic acid is more soluble in NaOH solution than in ether. This is because benzyl alcohol is nonpolar compound with hydrophobic benzene ring, which is more soluble in nonpolar ether solvent whereas benzoic acid is a polar compound with a carboxyl group (-COOH), which is more soluble in polar NaOH solution.

Partitioning process can be used to separate a mixture of benzyl alcohol and benzoic acid. By adding NaOH to the mixture in ether, benzoic acid will dissolve in NaOH solution, while benzyl alcohol will remain in ether. The two compounds can now be separated by simply separating the ether and NaOH layers.

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Answer:

put a filter to see if there is any stagering solution

Explanation:

Answer:

ohh... it's time vs air that's all

Answer:

Explanation:

Here, we want to get the new volume of the gas

What we need to know is the law that connects volume and pressure at constant temperature

The law that supports this is the Boyle's law

It states that the volume of a given mass of gas is inversely proportional to its pressure at constant temperature

Mathematically, we can have this as represented as:

We can proceed mathematically to solve as follows;

The rearranged equation for b in terms of c and a is: \(b^4 = (c^2 + a^2 - 2ac)c^2\).

The equation \(a^2 + b^2 = c^2\) represents a right-angled triangle, where a, b, and c are the sides of the triangle. To rearrange this equation for b, we need to isolate b on one side of the equation.

One way to do this is to subtract a^2 from both sides of the equation, which gives:

\(b^2 = c^2 - a^2\)

We can simplify this equation by squaring both sides:

\(b^4 = (c^2 - a^2)^2\)

We can then factor the left-hand side of the equation to get:

\(b^4 = c^4 - 2ac^2 + a^2c^2\)

We can rearrange this equation by grouping the terms:

\(b^4 = (c^2 + a^2 - 2ac)c^2\)

This is the equation for b in terms of c and a.

Therefore, the rearranged equation for b in terms of c and a is:

\(b^4 = (c^2 + a^2 - 2ac)c^2\)

This equation represents a quadratic equation in b, with c and a as the coefficients and b as the variable.  

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Correct Question:

Rearrange and Solve the following equation With respect to b term: a^2 + b^2 = c^2.

Answer:

Explanation:

its d

Answer:

D

Explanation:

(CH3)4N+  is quarternary

Answer:

Solar energy.

Answer:

All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum.

Answer:

15g

Explanation:

they're asking you to make a solution which contains 0.356 mol k2so4 per 1000 gr water, but they want you to use only 315 g of water

so you need to solve

0.356 mol k2so4 ÷ 1000gr water = X ÷ 315gr water

so you need X = 0.112 moles of k2so4

that weights

0.112 moles × ((2×19)+32+(4×16)) g/mol

The mentors will assist the chemist fellows in choosing themes that are appropriate for both the development of the Burg fellow and the undergraduate students' learning experience.

The mentor's ultimate objective is to make the trainee an autonomous researcher. Sharing expertise and abilities, supervising the trainee's work, assisting the trainee in connecting with other researchers, and providing career counselling are all aspects of mentoring.

Be mentee-focused and build your relationship based on the mentee's particular learning objectives. To assist the development of your mentee, give them unbiased comments and concentrate on their specific actions and behaviours.

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Answer:Comets are made of ice,dust,and rocky material.Asteroids are made of rock and metal material

Answer:

D

i think

Explanation:

Answer:

28

Explanation:

it states that the atom is neutral, meaning the number of electrons and protons are the same. so if there are 13 electrons, there are 13 protons. And the mass number is neutrons plus protons. So 13+15 is 28

The molality of a 4 kg solution containing 8 moles of a solute is 0.5 mol/kg. Option d is the correct answer.

Molality is the total number of moles of a solute present in one kilogram of a particular solvent. Molality also goes by the name molal concentration. It measures the concentration of the solute in a solution.

Molality is given by moles of a solute per kilogram of solvent. It differs from molarity, which is the number of moles of a solute per litre of the solution.

From the given question, the number of moles of the solute is 8

The mass of the solution is 4 kg.

From molality = number of moles / mass

Molality =  8 moles / 4 kg = 2

The molality is 2 for 4 kg of the solution, so for 1 kg of the solution it will be 2 / 4 = 0.5 mol/kg

Therefore, molality is 0.5 mol/ kg

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