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
Slav-nsk [51]
3 years ago
11

How does the law of definite proportions apply to hydrates?

Chemistry
1 answer:
vladimir1956 [14]3 years ago
4 0
The law of definite proportions would state that a hydrate always contain exactly the same proportion of salt and water by mass.
strictly speaking, the law of definite proportion states that a compound always 
contains exactly the same proportion of elements by mass.
But the law is often applied to groupings of elements in compound.
Hydrates are salt that have a certain amount of  water asa part of their structure.
The water is chemically combined with the compound in a definite ratio.
You might be interested in
Which of the following compounds is a gas at room temperature? A : CH3CH2OH B : CH3CH2CH2CH2CH2CH2CH3 C : CH3CH2CH3 D : HOCH2CH2
attashe74 [19]

Answer:

C. CH_3CH_2CH_3

Explanation:

Molecules with the stronger intermolecular forces are pulled tightly together  to form solid at higher temperatures and that's why the freezing point is higher.

Also, molecules with the stronger intermolecular force have greater interaction between the molecules and thus on heating do not boil easily and have high boiling point also.

Thus, melting point and boiling point increases with increase in number of carbon atoms and also increase in intermolecular forces (like hydrogen bonding, if present).

Thus, the compound which is gas at room temperature is CH_3CH_2CH_3 <u>because it has least number of carbon atoms and absence of hydrogen bonding.</u>

<u></u>

8 0
3 years ago
A rubber ball is held 4.0 m above a concave spherical mirror with a radius of curvature of 1.5 m. At time equals zero, the ball
exis [7]

The time elapsed when the ball placed above the concave mirror and the image formed would be at the same location is 0.55 s.

<h3>Image distance</h3>

The position of the image formed is determined using the followimg mirror formula;

\frac{1}{f} = \frac{1}{v} + \frac{1}{u}

where;

  • f is the focal length of the mirror
  • v is the image distance
  • u is the object distance

f = R/2

f = 1.5/2

f = 0.75 m

When the ball and its image is in the same position, u = v

The position of the ball is calculated as;

\frac{1}{f} = \frac{1}{u} + \frac{1}{u} \\\\\frac{1}{f} = \frac{2}{u} \\\\u = 2f\\\\u = 2(0.75)\\\\u = 1.5 \ m

<h3>Time of motion of the ball</h3>

The time taken for the ball to travel the caluclated distance is determined as;

h = ut + ¹/₂gt²

1.5 = 0  + ¹/₂(9.8)t²

1.5 = 4.9t²

t² = 1.5/4.9

t² = 0.306

t = 0.55 s

Thus, the time elapsed when the ball and its image are at the same location is 0.55 s.

Learn more about concave mirror here: brainly.com/question/7512320

8 0
2 years ago
Calculate the molarity of a solution prepared by dissolving 11.5 g naoh in enough water to make 1.5 l of solution.
Ronch [10]
Molar mass NaOH = 39.997 g/mol

Number of moles :

n = mass of solute / molar mass

n = 11.5 / 39.997

n = 0.287 moles

Therefore :

Molarity = moles solute / volume 

Molarity = 0.287 / 1.5 => 0.1913 M
3 0
3 years ago
How does gas exchange work at diffusion level
Artist 52 [7]
. S s. A aa a. A abol
5 0
3 years ago
Based on the passage, which resources and organisms
AnnZ [28]

Answer:air, water, and organisms in water

Explanation:

read the passage

4 0
3 years ago
Read 2 more answers
Other questions:
  • What’s 73m equal to in dm
    5·1 answer
  • What are some bad thing jellyfish do?
    12·1 answer
  • What did early scientists assume that the polar caps had in common?
    14·1 answer
  • In the space provided, for each element, type the ionic charge of an atom with a full set of valence electrons. Then, type the n
    15·1 answer
  • How are lead and plastic foam different?
    11·2 answers
  • As a substance changes from a liquid to a gas, the average distance between molecules..
    9·1 answer
  • Sandy puts a paper clip on the table. Then, she puts a magnet near the paperclip. The paperclip begins to move.
    11·2 answers
  • What is the potential energy of a rock with a mass of 10 kg while sitting on a cliff that is 15 m high
    7·1 answer
  • Un medicamento corresponde a una disolución de "nafazolina" (sustancia activa) en agua purificada, en una concentración de 12% V
    10·1 answer
  • Plz help me with these three please please !!!!!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!