26. All atoms area. positively charged, with the number of protons exceeding the number of electronsb, negatively charged, with the number of electrons exceeding the number of protonswith the number of protons equaling the number of electronsd. neutral, with the number of protons equaling the number of electrons. which is equal to thenumber of neutrons27. The particles that are found in the nucleus of an atom arec. protons and neutronsa, neutrons and electronsd. protons and electronsb. electrons only28. As a consequence of the discovery of the nucleus by Rutherford, which model of the atom is thought to betrue?a. Protons. electrons, and neutrons are evenly distributed throughout the volume of the atom.b. The nucleus is made of protons, electrons, and neutrons.c. Electrons are distributed around the nucleus and occupy almost all the volume of the atom.d. The nucleus is made of electrons and protons.29. The nucleus of an atom isa. the central core and is composed of protons and neutronsb. positively charged and has more protons than neutronsc. negatively charged and has a high densityd. negatively charged and has a low density

Answers

Answer 1

Answer: (26) All atoms area...with the number of protons equaling the number of electrons

(27) The particles that are found in the nucleus of an atom are... protons and neutrons.

(28) As a consequence of the discovery of the nucleus by Rutherford, which model of the atom is thought to be true?...Protons. electrons, and neutrons are evenly distributed throughout the volume of the atom.

(29) The nucleus of an atom is...the central core and is composed of protons and neutrons.

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During a chemical reaction substances called reactants During a chemical reaction substance called reactants are combined to form a new substance called products which of the following are currently describes reactions and products of a chemical reaction

Answers

Answer:

During a chemical reaction, substance called reactants are combined to form a new substance called products.

this sentence describes reaction and products of a chemical reaction

Name 4 toxicants that are heavier than air

Answers

Answer:

CO2,H2S,HALON,FREON that's is the four toxicants that are heavier than air

Which is an example of a heterogeneous catalyst?amylase
catalytic converter
food preservatives
amino acids

Answers

Answer:

catalytic converter

Explanation:

A heterogeneous catalyst is one that has a phase different from the reactant molecules. A catalyst speeds up a chemical reaction by lowering the activation energy required to start the reaction. But a catalyst does not undergo any change in the chemical process. Catalysts in a catalytic converter are metallic palladium or platinum that react with the hydrocarbons and carbon monoxide from the exhausts of a car to form carbon dioxide and water.

Final answer:

A heterogeneous catalyst is a catalyst that works in a different phase than the reactants. An example of this is a catalytic converter, used in cars to convert harmful emissions into less harmful substances.

Explanation:

In chemistry, a heterogeneous catalyst is a catalyst that exists in a different phase from the reactants. The primary purpose of a heterogeneous catalyst is to accelerate a certain chemical reaction without being consumed in the process. A clear example of a heterogeneous catalyst is a catalytic converter used in vehicles. The function of a catalytic converter is to convert harmful engine emissions into less harmful substances through catalysed chemical reactions. It includes metals like Platinum, Palladium, and Rhodium, which are what actually does the catalysis.

Learn more about Heterogeneous Catalyst here:

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The pH scale for acids and bases ranges from

Answers

0-14
0-6 is an acid
8-14 is a base
7 is neutral

A mineral is a naturally occurring solid with a regular, repeating structure. Please select the best answer from the choices provided T F

Answers

Answer: True,a mineral is a naturally occurring solid with a regular, repeating structure.

Explanation:

Minerals are natural occurring inorganic solid substance with fixed chemical composition. These solids are formed by repeating unit of their single crystal structure that is atom present in the minerals are arranged or placed in systematic pattern or fashion. For example : Halite is a mineral composed of chlorine and sodium atoms arranged in a cubic pattern.

So, the given statement is true.

According to American Science Heritage Dictionary, it is true that a mineral is a naturally occurring solid with a regular, repeating structure.

Mixture of sediments deposited by a glacier

Answers

Answer:

Till

Explanation:

Till is unsorted glacial sediment showing no stratfaction.

Answer: Glacier Deposition

Explanation:

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In a titration, 20.0 milliliters of 0.15 M HCI(aq) is exactly neutralized by 18.0 milliliters of KOH(aq).Complete the equation in your answer booklet for the neutralization reaction by writing the formula of each product. KOH(aq) + HCl(aq)==> ________ +________Compare the number of moles of H+(aq) ions to the number of moles of OH-(aq) ions in the titration mixture when the HCl(aq) is exactly neutralized by the KOH(aq). Determine the concentration of the KOH(aq).