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Mrac [35]
3 years ago
14

A rock dropped in a graduated cylinder raises the level of water from 20 mL to 35 mL. The rock has a mass of 45 g. What is the d

ensity of the rock?
Chemistry
1 answer:
Brut [27]3 years ago
7 0
I think 15 I might be wrong
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A low ph scale would indicate that the water is A. Neutral B. Basic C. Acidic
tatyana61 [14]
I think the answer is C. acidic
5 0
2 years ago
Question 2 (1 point)
Zigmanuir [339]

Answer: they are both at the same concentration

Explanation: You will know that the amount of solvent in and around the cell will be equivalent when they have the same amount of concentration. The answer to the question is they are both at the same concentration.

7 0
3 years ago
Which statement best relates the strength and concentration of a base? At high enough concentrations, a weak base becomes strong
Lorico [155]

Answer: Option (b) is the correct answer.

Explanation:

When there are more number of hydroxide ions in a solution then there will be high concentration of OH^{-} or hydroxide ions. As a result, more will be the strength of base in that particular solution.

A base is strong when it readily dissociate into its ions in the solution. When a base is strong, then it does not matter at what concentration it is dissolved in the solution because despite of its low concentration it will remain a strong base.

Thus, we can conclude that out of the given options, the statement even at low concentrations, a strong base is strong best relates the strength and concentration of a base.


6 0
3 years ago
Read 2 more answers
Given the following information:Br2 bond energy = 193 kJ/mol F2 bond energy = 154 kJ/mol 1/2Br2(g) + 3/2F2(g) -> BrF3(g) = –3
arlik [135]

Answer:

C) 712 KJ/mol

Explanation:

  • ΔH°r = Σ Eb broken - Σ Eb formed
  • 1/2Br2(g) + 3/2F2(g) → BrF3(g)

∴ ΔH°r = - 384 KJ/mol

∴ Br2 Eb = 193 KJ/mol

∴ F2 Eb = 154 KJ/mol

⇒ Σ Eb broken = (1/2)(Br-Br) + (3/2)(F-F)

⇒ Σ Eb broken =  (1/2)(193 KJ/mol) + (3/2)(154 KJ/mol) = 327.5 KJ/mol

∴ Eb formed: Br-F

⇒ Σ Eb formed (Br-F) = Σ Eb broken - ΔH°r

⇒ Eb (Br-F) = 327.5 KJ/mol - ( - 384 KJ/mol )

⇒ Eb Br-F = 327.5 KJ/mol + 384 KJ/mol = 711.5 KJ/mol ≅ 712 KJ/mol

8 0
3 years ago
A newly discovered unicellular organism from acidic mine drainage is found to contain a cell wall, a plasma membrane, two flagel
makvit [3.9K]

Answer:

<em>The correct option is D)  a motile eukaryote</em>

Explanation:

Peroxisomes are structures which are present only in the plant or animal cells. Hence, based on this observation we can easily tell that the organism which is newly discovered is a eukaryote. Both plants and animals are eukaryotes.

Flagella are structures which are thin and hair shaped. Flagella allow movement of a cell, mostly they allow a whip-like movement. Based on this observation we will conclude that the organism discovered is a motile eukaryote.

5 0
3 years ago
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