CHEMISTRY HIGH SCHOOL

Describe one of the major differences between oceanic crust and continental crust.

Answers

Answer 1
Answer: i think oceanic crust occur inside ocean &
continental crust occurs inside continent

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Which of the following is the correct molecular shape of NH3?А) bent
B) linear
C) tetrahedral
D) trigonal pyramidal

Answers

A bent


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What determines an element's chemical properties

Answers

An element's chemical properties are determined by the number ofelectrons .

How do  electrons determine chemical properties?

The number of electrons determine chemical properties of an atom as they are present in equal number outside the nucleus as that of protons .Protons contribute to the mass of an atom and give an identity to an atom .

As protons are positively charged there is a need to balance this positive charge and it is balanced by an equal number of electrons .As the valence electrons are the electrons which take part in chemicalreactions the element's chemical properties are determined  by the number of electrons.

The number of neutrons has a negligible effect on the chemical nature of elements as they are neutral and have no charge.Indirectly, it's the electronic configuration of an element which determines the chemical properties of any element.

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The three factors determine the chemical properties of an element:
The number and arrangement of electrons in an atom
The number of valence electrons
The number and arrangement of electrons

Air contains maximum amount of?

Answers

Nitrogen by 78 percentage.

8. Which phrase best describes an atom?(A) a positive nucleus surrounded by a ha dnegative shell(B) a positive nucleus surrounded by a cl udof negative charges(C) a hard sphere with positive particlesuniformly embedded(D) a hard sphere with negative particlesuniformly embedded

Answers

The best answer is B.... The nucleus is after all positively charged and the shells are a cloud of negatively charged particles that surround the nucleus.

An Atom is best described as a positive nucleus surrounded by a cloud of negative charges, with the nucleus containing protons and neutrons, and an outer cloud of electrons.

The phrase that best describes an atom is (B) a positive nucleus surrounded by a cloud of negative charges. An atom consists of two regions: the nucleus, which is centrally located and contains protons and neutrons which are positively charged and neutral respectively; and the electron cloud, which is made up of electrons, that are negatively charged, in constant motion around the nucleus. Therefore, we can visualize the atom as a positive nucleus surrounded by a cloud of negative charges.

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The liquid substances mercury (density = 13.6 g/mL), water (1.00 g/mL), and cyclohexane (0.778 g/mL) do not form a solution when mixed; instead, they separate in distinct layers. List how the liquids would position themselves in a test tube. Rank the liquids from the top of the tube to the bottom.

Answers

Answer:

Cyclohexane, water, mercury.

Explanation:

One result of Archimedes' principle is that, in a container, the substance with the highest density will be in the bottom of the container and the substance with the lowest density, will be in the top of the container.

In the test tube with mercury, water and cyclohexane. In the top you will have cyclohexane (Least dense), in the middle will be the water and in the bottom will be mercury.

From the top to the bottom:

Cyclohexane, water, mercury.

A 55.0 g piece of iron at 505 ° C is put into 735 grams of water at 15.0 ° C. What is the final temperature of the water and the iron?

Answers

Answer:

It would be 95.3

Explanation:
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Why am i not good enough :,(