CHEMISTRY HIGH SCHOOL

Atoms are the building blocks of elements, molecules, compounds, and mixtures.
true or false?

Answers

Answer 1
Answer:

Answer:

true

Explanation:

they are the building part of all thing

Related Questions

The value of the equilibrium constant for the combination of nitrogen and oxygen to make NO is 2 x 10-9. What does this tell you about the concentrations of materials in the equilibrium mixture?
Compounds put together will form -a. elements. b. mixtures. c. atoms. d. pure substances.
Why is glass a good substance for storing chemicals?A. Glass is a noble solid. B. Glass has low reactivity. C. Glass is cheap and readily available. D. The melting point of glass is very high.
Select the atomic symbol that would represent an isotope with 13 protons and 14 neutrons. A. 14 16 N B. 13 6 C C. 27 14 Si D. 27 13 Al
A + B → C Select the rate law for the reaction above using the following information: Holding the concentration of A constant and doubling the concentration of B results in the rate of the reaction increasing from 1.5E-3 M/s to 1.2E-2 M/s. Keeping the concentration of B constant and doubling A results in the rate of the reaction increasing from 1.5E-3 M/s to 3.0E-3 M/s.

What is the total number of electrons shared in a double covalent bond?(1) 1 (3) 3
(2) 2 (4) 4

Answers

The correct answer is option 4. In a double covalent bond, two pairs of electrons are bonded or there is a total of four electrons being shared in a bond. For example, we have oxygen. Two atoms of oxygen share two pairs of electrons to have a stable structure.

Talc _____. is the hardest known mineral has a Mohs hardness of 1 has a Mohs hardness of 10 is harder than quartz

Answers

Talc is the softest known mineral which is why it has a Mohs hardness of 1. The Mohs Hardness Scale is the most popular way of measuring and testing the hardness of a mineral. The Mohs hardness ranges from 1 (softest) to 10 (hardest). The hardest mineral with a Mohs hardness of 10 is diamond.

Talc is a clay mineral composed of magnesium silicates commonly used in making powder, paint, cosmetics, and many other products.

The answer is has a Moh's hardness of 1.

Which elements does it take to spell "nerds" using the chemical symbols on the Periodic Table of Elements?A.
Nitrogen, einsteinium, radon, sulfur
B.
Neon, rubidium, dysprosium
C.
Nitrogen, erbium, darmstadtium
D.
Nickel, einsteinium, ruthenium, silicon

Answers

If we looks at the elements and the periodic table . A is correct because Nitrogen is N , Ensteinium is E, Radon is RN, and lastly S is sulfer.

I hope this helps you! :)

The _____ agent is the substance in a redox reaction that accepts electrons.B. oxidizing
C. buffering
D. half-reaction

Answers

B. oxidizing 

In the reaction the oxidizing agent is reduced.

the answer is oxidizing look it up

Also i took the test

The saturation index for a pool measures the balance between the acid level and the amount of minerals in pool water. Balanced water has an index value of 0. Water is highly corrosive or highly scale forming if the absolute deviation of the index value from 0 is greater than 0.5. Find the index values for which pool water is highly corrosive or highly scale forming.

Answers

Answer: The water is highly corrosive when the saturation index < - 0.5 and

> 0.5

Explanation:

If the saturation index for a pool measures the balance between the acid level and the amount of minerals in pool water. Considering its balanced water has an index value of 0.

The water is highly corrosive when the saturation index < - 0.5 and

> 0.5

The attachment below shows the calculations.

Mass of 2.88x10^-4 mol of ascorbic acid

Answers

Molar mass C₆H₈O₆ = 176.12 g/mol

1 mole ------------------ 176.12 g
2.88x10⁻⁴ mole -------  ?

mass = 2.88x10⁻⁴ * 176.12 / 1

mass ≈ 0.05072 g

hope this helps!
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