What is the unit of compressed air?

 What is the unit of compressed air?

Answer: Like any gas pressure, it is measured in Pascal (Pa), bar, or pounds per square inch (psi).

Comments

Post a Comment

Popular posts from this blog

Choose the correct answer.

Test Your Concept multiple-choice questions: 1. Tick the correct alternative. a. Which of the following is the correct number of periods in the modern periodic table? ii. 7 b. Why do elements in the same group show similar chemical properties? iii. They have the same number of valence electrons. c. Which element will have the highest electronegativity in the second period? iv. Fluorine d. Which statement best explains why atomic size decreases across a period? i. Nuclear charge increases while shells remain the same. e. In which group does sodium belong to in the periodic table? iii. group 1 f. On which basis, are elements arranged in the modern periodic table? iii. atomic number g. Which of the following belong to the same period? (Looking at the table: A=2 (Helium, Period 1), B=10 (Neon, Period 2), C=5 (Boron, Period 2), D=11 (Sodium, Period 3)) ii. B, C h. What is the molecular weight of ammonia? (Nitrogen = 14 amu, Hydrogen = 1 amu × 3 = 3 amu. Total = 17 amu) i. 17 amu
Read more

Short questions from classification of elements

  Answers to Questions a. What is meant by classification of elements? Grouping elements by shared properties. Making the study of elements easy. b. State the modern periodic law. The physical and chemical properties of elements are a periodic function of their atomic numbers. c. How many periods are there in the modern periodic table? There are 7 horizontal rows called periods.   d. What are noble gases? Elements in Group 18 of the periodic table. They are unreactive and stable gases like helium and neon.   e. Why are alkali metals placed in Group 1? They have one valence electron in their outer shell. They share similar chemical properties.   f. Why do noble gases have zero valency? Their outermost electron shells are completely full. They do not need to lose, gain, or share electrons.
Read more