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
Nesterboy [21]
3 years ago
9

Matter changes whenever _______ is added or taken away

Chemistry
2 answers:
zaharov [31]3 years ago
8 0
Matter changes whenever ENERGY is added or taken away
Alja [10]3 years ago
7 0
Matter changes whenever energy is added or taken away.
You might be interested in
What are the two flasks for measuring the liquid volume?
aleksandrvk [35]

Answer:

Liquid volume is usually measured using either a graduated cylinder or a buret.

7 0
3 years ago
Which of the following aqueous solutions will have the lowest freezing point? a. 0.75 m (NH4)3PO4 b. 1.0 m CaSO4 c. 1.0 m LiCl d
Nataly [62]

Answer: a. 0.75m (NH4)3PO4 will have the lowest freezing point .

Explanation: Freezing point decreases as the concentration of the solute substance increases. Assuming the same solvent for all of them, for instance water.

∆T= i.Kf.b

∆T= freezing point depression

i= vant Hoff factor

Kf= molality

Assuming water to be the solvent for all Kf=1.86°C/M

VANT HOFF FACTORS :

For (NH4)3PO4

This has 3 ionic bonding and 1 covalent bonding making it 4 bond

Therefore i=4

For CaSO4

This has 1 metallic bond and 1 covalent bond making it 2 bond.

Therefore i=2

For LiCl

This has 1 metallic bond and 1 non metallic bond making it 2 bond.

Therefore i=2

For CH3OH

This has only 1 covalent bond.

Therefore i=1

MOLALITY:

(NH4)3PO4 = 0.75M

CaSO4= 1.0M

LiCl= 1.0M

CH3OH= 1.5M

FREEZING POINT DEPRESSION:

For (NH4)3PO4

∆T= 4×0.75×1.86=5.58°C

For CaSO4

∆T= 2×1.0×1.86=3.72°C

For LiCl

∆T = 2×1.0×1.86= 3.72°C

For CH3OH

∆T= 1×1.5×1.86=2.79°C

REMEMBER THE HIGHER THE FREEZING POINT DEPRESSION THE LOWER THE FREEZING POINT.

FREEZING POINT DEPRESSION IS THE CHANGE IN THE FREEZING POINT PROPORTIONAL TO THE AMOUNT OF SOLUTE ADDED THE THE SOLUTION.

THEREFORE THE ONE WITH THE LOWEST FREEZING POINT IS (NH4)3PO4

4 0
4 years ago
H E L P Nitrogen is collected in gas jar by the downward displacement of water why explain it <br>​
Feliz [49]

Answer:

This is because, nitrogen is less dense than water, with a density of 1000 g/L, it is sparingly soluble in water and it is easy to differentiate between it and water.

Explanation:

<h2>hope it is helpful for you</h2><h2>Thank you </h2>
8 0
3 years ago
What class of elements includes all of the elements that are gases at room temperature? nonmetals metals metalloids?
Novay_Z [31]
Metals have high density. They are always solids at room temperature.
Metalloids have intermediate density. They are generally solids at room temperature.
Non-metals have low density. They can be solids, liquids or gases at room temperature.

Based on this, the <span>class of elements that includes all of the elements that are gases at room temperature is the non-metals</span>
6 0
3 years ago
Read 2 more answers
Does phosphate have the ability to conduct electricity?
baherus [9]

Answer:

Red phosphorous can vary in colour from orange to purple, due to slight variations in its chemical structure. The third form, black phosphorous, is made under high pressure, looks like graphite and, like graphite, has the ability to conduct electricity.

Explanation:

4 0
3 years ago
Other questions:
  • What’s the equation for
    12·1 answer
  • Write the formula of the conjugate base of each acid: HBr, HCO3−, and CH3CH2CH2OH. Be sure to answer all parts. (Note: If a numb
    8·1 answer
  • Why does the ocean heat and cool more slowly than the atmosphere?
    10·2 answers
  • Putting up 98 points! Will give medal
    7·2 answers
  • A solution is prepared by pipetting 20.00 mL of a 1.00 x 10-3 M NaCl solution into a 250.0 mL volumetric flask. The flask is dil
    13·1 answer
  • What type of reaction does this illustration represent?
    8·1 answer
  • Gasoline is used to power most of the cars in the United States and worldwide. The average fuel economy for a gasoline powered c
    10·1 answer
  • While the Bohr model fails to show the true shape of the electron orbitals with in an atom, it is still used because it ?
    8·1 answer
  • If something melts fast does it have a high or low melting point?
    15·1 answer
  • 100 g of mercuric oxide decomposes to produce oxygen of oxygen (O) and mercury (Hg) in a chemical reaction. According to the Law
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!