CHEMISTRY HIGH SCHOOL

Which air pollutant affects people who have heart disease?Carbon monoxide
Pollution
Particulate matter
Ozone

Answers

Answer 1
Answer: The correct answer is the third option. Particulate matter is the air pollutant known to affect people with a heart disease. According to research, this pollutant is associated with an increased risk of cardiovascular diseases.
Answer 2
Answer:

Answer:

the answer is Particulate matter

Explanation:

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The process of seeking facts that will lead to the truth is called _____.study
research
intuition

Answers

Answer:

The given blank can be filled with research.

Explanation:

The procedure of looking for facts, which will lead to the truth is known as research. In the absence of research one cannot conclude that the facts or statements are right. Research is illustrated as a systematic and creative work performed to enhance the stock of knowledge, comprising knowledge of culture and society, humans, and the application of this knowledge stock to device novel uses.
The process of seeking facts that will lead to the truth is called research.

Which formula represents copper(I) oxide?
(1) CuO (3) Cu2O
(2) CuO2 (4) Cu2O2

Answers

Answer : The correct formula of copper(I) oxide is, (3) Cu_2O

Explanation :

Copper(I) oxide is an ionic compound because copper element is a metal and oxide element is a non-metal. The bond formed between a metal and a non-metal is always ionic in nature.

The nomenclature of ionic compounds is given by:

  • Positive ion is written first.
  • The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
  • In case of transition metals, the oxidation state are written in roman numerals in bracket in-front of positive ions.

The charge on copper is (+1) and the the charge on oxide is (-2). The charges are not balanced.  The charges are balanced by the criss-cross method.

Hence, the formula of copper(I) oxide is, Cu_2O
The answer is (3) Cu2O. Copper (I) has an oxidation state of +1 (that's what the "I" indicates). You can also think of this as copper (I) having a charge of +1. Oxygen has an oxidation state of -2 (that's just a rule you have to know), and you can think of it as oxygen having a charge of -2. You need oxidation numbers in a neutral compound to add up to 0 (or charges in a neutral compond to add up to 0), so you need two Cu to balance the O, which is Cu2O.

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

Answers

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. 

Which one of the following statements about absolute zero is correct? (a) At absolute zero, the volume of an ideal gas is zero.
(b) At absolute zero, ideal gases freeze to give solids.
(c) At absolute zero, solid and liquid water are at equilibrium.
(d) Absolute zero is the lowest temperature so far reached in the laboratory

Answers

The statement labeled as (a) is the correct one on that list.

What similarities do nuclear energy and chemical energy share?

Answers

atoms can be the source of both nuclear and chemical energy. Nuclear energy involves the atom's nucleus; chemical energy involves the atom's electrons—subatomic particles that surround the nucleus.

Both are types of potential energy, and Involve stored energy.  

Which is a basic funcional group that can accept H+ and become positively charged? A) CH ₃ B) OH C) NH₂ D) COOH

Answers

C) NH2

EXPLANATION:
the amino group (NH2) is a basic, or alkaline, group which can accept a proton (H+) and become positively charged.
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A compound has a molar mass of 90 grams per mole and the empirical formula CH2O. What is the molecular formula of this compound?
Does 1-propanol expected to have a higher boiling point than ethyl methyl ether
Is T2R an Atom or a Molecule?​