How many elements are in a set whole numbers between 3 and 15

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Answer 1

Answer: The set of elements composed of whole numbers between 3 and 15 consists of 4, 5, 6,7,8,9, 10, 11,12,13,14. Counting these, the number of elements is 11.

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How many grams of KNO₃ should be used to prepare 2.00L of a .500 M solution ?
Choose the correct one plz!
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Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is 4.5 × 10^-4. Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is
4.5 × 10^-4.

Answers

HNO2 =====> H+ + NO2-
Initial concentration = 0.311
C = -x,x,x
E = 0.311-x,x,x

KNO2 ====>K+ + NO2-
Initial concentration = 0.189
C= -0.189,0.189,0.189
E = 0,0.189,0.189

What is the term for a solid substance that is composed of minerals?

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A rock may consist of one type of mineral or may be an aggregate of two or more different types of minerals, spacially segregated into distinct phases. Some natural solid substances without a definite crystalline structure, such as opal or obsidian, are more properly called mineraloids.

What information does a chemical formula of a compound provide?a. The type and amount of elements
b. The different kinds of compounds included within the chemical formula
c. The types of molecules present in a formula
d. The correct amounts of substances to mix together to make a formula

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I think the best option is A. A chemical formula of a compound provides information on the type and amounts of elements in that compound. For instance, we have NaOH. From the given formula, we see that it contains the elements sodium, oxygen and hydrogen. Also, their corresponding number of molecules.

In the ground state, has only 1 electron in a p orbital.A. carbon
B. fluorine
C. hydrogen
D. nitrogen
E. aluminum

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Aluminium is the element you are looking for

(E) Aluminium is the answer

Groups of cells that work together are called .

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group of tissues form a cell , and a group of cells form an organ

What particles in an atom are involved in chemical reactions

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Answer: Electrons

Explanation: In chemical reactions, elements and compounds change in order to form different substances. This changes can be:

1. oxidation state: which is define as the charge of the atom

2. bonding: atoms in a compound are bonded, this bonds can break so atoms rearrange to form different substances

In this changes electrons are involve. The charge depends on the amount of negative charge of electron respect to positive charge of proton in nucleus which remain the same, otherwise we would be talking about nuclear reactions.

Also, bonding depends on the electrons that atoms can give, receive or share to form ionic or covalent bonds.

Other Questions

The chemical properties of an element are largely determined by itsa. number of energy levels. b. period number. c. number of protons. d. number of valence electrons.

Please help brainiest.

Which statement best describes the collisions of gas particles according to the kinetic-molecular theory? a. When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with no gain or loss of energy. b. As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with no gain or loss of energy. c. When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with a loss of energy. d.As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with a loss of energy.

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