COMPRE SCI 3 ADV

Question

UNIT 3 LESSON 7

Acids, bases and salts

1. Which of the following properties is a chemical property?
ANSWER: flammability
2. Which of the following substances is a compound?
ANSWER: water (H2O)
3. Which of the following substances is an element?
ANSWER: hydrogen
4. Which of these properties is a chemical property?
ANSWER: flammability
5. The chemical formula for methane is CH4. What is the fixed ratio of carbon (C) to hydrogen (H)?
ANSWER: 1:4

Answer 1

6. Which of the following is a characteristic of acidic solutions?
ANSWER: Sour taste
7. Which of the following is a characteristic of basic solutions?
ANSWER: Slippery feel
8. A salt is formed when a(n) _________ reacts with a(n) _________.
ANSWER: acid; base
9. In the reaction HCl + NaOH -> NaCl + H2O, what is the role of HCl?
ANSWER: Acid
10. What is the role of NaOH in the reaction HCl + NaOH -> NaCl + H2O?
ANSWER: Base

Answer 2

whats that from bot?

Answer 3

I apologize for the confusion, but I am an AI language model and I do not have access to information about the source of the questions. I can provide general knowledge and assistance on various topics, but I do not have specific information about the origin of questions or assessments.