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
Law Incorporation [45]
3 years ago
14

Pls answer fast chem questions

Chemistry
1 answer:
gregori [183]3 years ago
7 0

I don't recognize this problem, please make sure the input is complete.

You might be interested in
Name 3 ways ecologist can estimte the size of population
sergiy2304 [10]
1. Count them
2. Trap, Mark, and Release
3. Sample Count

I hope this helps your score!!
8 0
3 years ago
A teacher brings in a cup of iced water and asks students to discuss if the system is exothermic or endothermic . Aida states th
Montano1993 [528]

Answer:

C

Explanation:

In thermodynamics, a exothermic system looses heat to the surroundings while an endothermic system absorbs heat from the surroundings.

A system is a part the universe marked off by a specified boundary. The contents of the cup constitutes the system in this case.

The region of space outside the system is called the surroundings. Hence everything outside the cup constitutes the surroundings.

7 0
3 years ago
Wait is there a difference between number of mol and number of moles? Or do they mean the same thing lol
Luden [163]
Mols is shorthand for molarity, a unit of measurement corresponding to moles/liter. A mole is just a number for example “ a dozen”. Mole is also spelled mol in chemistry so they do mean the same.


Thank me by clicking the heart ❤️. Thanks!
5 0
3 years ago
If the flask has a volume of 0.25 l , what is the minimum mass of ph3bcl3(s) that must be added to the flask to achieve equilibr
zvonat [6]
In order to attain equilibrium, you need to have a minimum of a minute amount of PH3BCl3(s) left in the flask. Alternatively, it will be all spend before you attain equilibrium concentration. Let PH3BCl3(s) be called C. Molecular weight of C is 151. 
4.32x10^-2molC/1L x 0.25 L x 151gC/1molC = 1.63 g C is the answer.
6 0
3 years ago
A compound is 53. 31% c, 11. 18% h, and 35. 51% o by mass. What is its empirical formula? insert subscripts as needed.
lyudmila [28]

Answer:

C2H5O

Explanation:

In a 100 g sample we would have

53.31 g of C

11.18g of H

35.51g of O

First, we find the relative number of atoms of each element by dividing the number of grams the element has in the compound by its atomic mass.

Atomic mass of carbon is 12.011

Relative number of carbon atoms = 53.31 / 12.011 = 4.4

Atomic mass of hydrogen = 1.007

Relative number of hydrogen atoms : 11.18/1.007 = 11.1

Atomic mass of oxygen : 15.999

Relative number of oxygen atoms : 35.51 / 15.999 = 2.2


Now we find a ratio of the relative number of atoms by dividing the # of relative atoms of each element by the element's relative number of atoms that had the lowest number. ( oxygen which had 2.2 ) The outcome of each will be the subscript or number of atoms of each element.

Carbon : 4.4 / 2.2 = 2

Hydrogen : 11.1 / 2.2 = 5

Oxygen : 2.2 / 2.2 = 1

The answer is C2H5O

8 0
2 years ago
Other questions:
  • Object A: has a mass of 2g a volume of .5L
    5·1 answer
  • An isotope undergoes radioactive decay by emitting radiation that has no mass. What other characteristic does the radiation have
    6·2 answers
  • I really need help please help me I have 10 minutes to finish
    5·1 answer
  • Can someone please answer these
    12·1 answer
  • Elements in the same period Question 7 options: A) form bonds with the same type of elements. B) have the same number of protons
    7·1 answer
  • 3. Una piedra que se tira verticalmente hacia arriba se mueve según la
    12·1 answer
  • What is this?<br> "This car is speeding up"
    11·2 answers
  • Within which of Linnaeus's groupings are organisms most closely related to one another?
    9·1 answer
  • What’s the difference between nonrenewable and renewable energy sources? Is biomass a renewable energy source?
    8·2 answers
  • Monosaccharides and disaccharides are what kind of molecules?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!