This malleable metal has an atomic number of 79

Answers

Answer 1

Answer: The malleable metal on the periodic table with the atomic number of 79 is gold

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A sample of water is heated from 10.0 degrees Celcius to 15.0 degrees Celcius by the addition of 125 Joules of heat. What is the mass of the water?

Answers

Answer:

125 = 5*4.186*m

m = 125 / 5*4.186 = 5.97g of water.

Explanation:

The water is increased by 5 degrees. This means that for every gram of water, it takes 5*4.186 J to increase the temperature by 5 degrees, aka 5*4.186 J/g

hope this help:)

What are the hazards, if any of the reactants AgNO3, and K2CrO4?

Answers

This is what i wrote in my notebook: (for AgNO3)
Health Hazards Acute and Chronic: ACUTE:
INHALATION - MAY CAUSE SEVEREIRRITATION TO MUCOUS MEMBRANES.
SKIN - MAY CAUSE SEVERE IRRITATION.
EYE - MAY CAUSE SEVERE IRRITATION.
CHRONIC: INHALATION, SKIN &INGESTION - MAY CAUSE ARSYRIA.Explanation of Carcinogenicity:THIS COMPOUND CONTAINS NO INGREDIENTS ATCONCENTRATIONS OF 0.1% OR GREATER THAT ARE CARCINOGENS OR SUSPECTCARCINOGENS.

AgNO3 + K2CrO4 = Ag2CrO4 + KNO3

What is the shortest day of the year known as? A.vernal B.equinox C.winter D.solstice summer solstice E.autumnal equinox

Answers

Answer:

summer solstice

Explanation:

on june solstice the northen hemisphere leans more toward the sun giving us longer days and more strong sunlight and It's the opposite in the Southern Hemisphere where june marks the start of winter thus its the shortest day of the year

The following balanced equation shows the decomposition of water (H2O). According to the equation, how many oxygen atoms are in the reactants? 2 H2O 2H2 + O2

Answers

Answer: There are 2 oxygen atoms on the reactant side.

Explanation:

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed, but it can only be transformed from one form to another form.

This law also means that total number of individual atoms on the reactant side will always be equal to the total number of individual atoms on the product side.

The given balanced chemical equation follows:

$2H_2O\rightarrow 2H_2+O_2$

On reactant side:

Number of hydrogen atoms = 4

Number of oxygen atoms = 2

On product side:

Number of hydrogen atoms = 4

Number of oxygen atoms = 2

Hence, the number of oxygen atoms on the reactant side is equal to 2.

The following balanced equation, 2H2O = 2H2 +O2, shows the decomposition of water (H2O). According to the equation, there are two oxygen atoms in the reactants and another two oxygen atoms in the product side.

Which statement correctly describes a chemical equilibrium? it must take place in an open system the mass of the reactants and the mass of the products are no equal it is affected by the addition of a catalyst it does not involve a reversible reaction the concentrations of reactants and products are equal

Answers

In your choices, the best answer is the mass of the reactants and the mass of the products are no equal. The chemical equilibrium can take place in a close system and can not be affected by catalyst and is a reversible reaction. The best describe should be the concentration of reactants and products are constant.

The chemical equilibrium can take place in a close system and can not be affected by catalyst and is a reversible reaction.

The term "chemical equilibrium" describes a situation in which a chemical reaction's forward reaction rate and reverse reaction rate are equal. In other words, throughout time, the reactant and product concentrations in the reaction mixture do not change. Even if the individual reactions may still be in progress, there is no net change in the reactant or product concentrations at the point of chemical equilibrium. This occurs as a result of the equalisation of the rates at which molecules react to create products and molecules disintegrate into reactants. Even though the reaction is still taking place at the molecular level, the system is in equilibrium and it appears to have stopped.

To know more about chemical equilibrium, here:

brainly.com/question/4289021

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Which substance is a binary acid

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It is knownthat acids compounds contains hydrogen and produces hydrogen ion in water. A binaryacid however is an acid that have two elements, one of the element has ahydrogen attached to it. Examples of binary acids are hydrogen fluoride (HF),hydrogen bromide (HBr) and hydrogen sulfide (H2S). In naming a binary acid, ithas two rules; one, as pure compounds and two, as acid solutions. For purecompounds, start with the name ‘hydrogen’ and end the anion name with ‘-ide’. Foracidic compounds, start with ‘hydro-‘, end the anion with ‘-ic’ and add ‘acid’.

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