1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
solong [7]
3 years ago
6

Which organelle is the control center of the cell?

Chemistry
1 answer:
Ivenika [448]3 years ago
6 0

Answer:

nucleus

Explanation:

You might be interested in
Is cl metal nonmetal or metalloid<br> or metalloid
Korvikt [17]

Answer:

nonmetal

Explanation:

go to ptable.com. it helps a lot

4 0
3 years ago
Question # 4 &amp; 5. help CHEMISTRY
laila [671]
1. A thermodynamic quantity that is the difference between the internal energy of a system and the product of itsabsolute temperature and entropy; the capacity of a system to do work, as in an exothermic chemical reaction.<span>2. </span>A thermodynamic quantity that is the difference between the enthalpy and the product of the absolute temperatureand entropy of a system. Also called <span>Gibbs free energy</span>. 
4 0
3 years ago
If a buffer solution is 0.220 M in a weak acid ( Ka=7.4×10−5) and 0.540 M in its conjugate base, what is the pH?
valkas [14]

Answer: the pH of the solution is 4.52

Explanation:

Consider the weak acid as Ha, it is dissociated as expressed below

HA     H⁺  +  A⁻

the Henderson -Haselbach equation can be expressed as;

pH = pKa + log( [A⁻] / [HA])

the weak acid is dissociated into H⁺ and A⁻ ions in the solution.

now the conjugate base of the weak acid HA is

HA(aq) {weak acid}     H⁺(aq)  +  A⁻(aq) {conjugate base}

so now we calculate the value of Kₐ as well as pH value by substituting the values of the concentrations into the equation;

pKₐ = -logKₐ

pKₐ = -log ( 7.4×10⁻⁵ )

pKₐ = 4.13

now thw pH is

pH = pKₐ  + log( [A⁻] / [HA])

pH = 4.13 + log( [0.540] / [0.220])

pH = 4.13 + 0.3899

pH = 4.5199 = 4.52

Therefore the pH of the solution is 4.52

6 0
3 years ago
A/An ______ bond occurs when 2 atoms share electrons.
allsm [11]

Answer:

convalent???????

Explanation:

sowwy if it wrong

8 0
2 years ago
Write the symbol of each neutral element based<br> on its Noble Gas Shorthand configuration:
ki77a [65]

Answer:

1. Co

2. C

3. Ba

Explanation:

4 0
3 years ago
Other questions:
  • Help ASAP please. I don’t understand.
    13·1 answer
  • Problem page a virus has a mass of ×9.010−12mg and an oil tanker has a mass of ×3.0107kg . use this information to answer the qu
    5·2 answers
  • 500 grams of a soil is taken and dried completely in bright sunshine. The mass of dried soil is found to be 450 grams. The perce
    12·1 answer
  • 1 Mr. Chavez paid $14.32 total for 8 protein bars.
    14·1 answer
  • Elastic energy is stored when an object is stretched. Is this an example
    11·1 answer
  • Which scientific skill involves using one or more of your senses to help gather information?
    6·1 answer
  • Which is sign that work is being done
    5·2 answers
  • HELP ANYONE PLEASE PLEASE PLEASE ALSO IF THE ANSWER IS WRONG I WILL REPORT IT AND YOU WILL LOSE YOUR POINTS SO PLEASE CAN IT BE
    15·2 answers
  • A flask at room temperature contains exactly equal amounts (in moles) of nitrogen and xenon.
    5·1 answer
  • How many divisions are used to classify living organisms?<br> a) 5<br> b) 6<br> c) 8<br> d) 7
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!