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
anyanavicka [17]
3 years ago
14

It is important to understand the differences between chemical and physical changes. Chemical changes result in new substances,

but physical changes do not. Which process is an example of a physical change?
Chemistry
1 answer:
Marysya12 [62]3 years ago
7 0

Answer:

Melting of ice

Explanation:

A physical change is one in which just the physical properties of the matter is altered. Most phase changes reaction falls under this type of change.

  • Examples are boiling, melting, freezing, condensation, sublimation, magnetization of metals, breaking glass, cutting wood.
  1. No new kinds of matter is formed.
  2. The process is reversible
  3. No change in mass
You might be interested in
Hey plz don't report but what if someone lked my girlhood did I lose my vrginty . I really want someone to eat me. A really good
BARSIC [14]
U got kik?
 lets talk first before we go any further


8 0
3 years ago
2 H2 + O2 → 2 H2O<br> Is the reaction balanced?
Alinara [238K]
Yeas, the reaction is balanced
6 0
3 years ago
A 720. cm^3 vessel contains a mixture of Ar and Xe. If the mass of the gas mixture is 2.966 g at 25.0°C and the pressure is 760.
sleet_krkn [62]

Explanation:

The given data is as follows.

      Pressure (P) = 760 torr = 1 atm

      Volume (V) = 720 cm^{3} = 0.720 L

     Temperature (T) = 25^{o}C = (25 + 273) K = 298 K

Using ideal gas equation, we will calculate the number of moles as follows.

                                PV = nRT

   Total atoms present (n) = \frac{PV}{RT}

                                          = 1 \times \frac{0.720 L}{0.0821 \times 298}

                                           = 0.0294 mol

Let us assume that there are x mol of Ar and y mol of Xe.

Hence, total number of moles will be as follows.

               x + y = 0.0294

Also,      40x + 131y = 2.966

             x = 0.0097 mol

              y = (0.0294 - 0.0097)

                = 0.0197 mol

Therefore, mole fraction will be calculated as follows.

Mol fraction of Xe = \frac{y}{(x+y)}

                               = \frac{0.0197}{0.0294}

                              = 0.67

Therefore, the mole fraction of Xe is 0.67.

6 0
3 years ago
When our body temperature starts to increase, the blood flow to the skin increases and we produce large volumes of sweat, which
Troyanec [42]
I took the U.S.A
test prep and the answer is B
5 0
3 years ago
Read 2 more answers
Suppose you were told that the above reaction was a substitution reaction but you were not told the mechanism. Evaluate the foll
Zarrin [17]

Answer:

The alkyl halide is secondary

The nucleophile is a poor nucleophile

The solvent is a protic solvent

The product is racemic

Explanation:

The reaction is shown in the image attached.

Alkyl halides undergo nucleophilic substitution by two mechanisms; SN1 and SN2. The particular mechanism that applies depends on;

I) structure of the alkyl halide

ii) nature of the nucleophile

iii) nature of the solvent

Looking at the reaction under review, we can see from the structure that the alkyl halide is a secondary alkyl halide. A secondary alkyl halide may undergo substitution via SN1 or SN2 mechanism depending on the conditions of the reaction.

If the nucleophile is poor, and the solvent is protic, SN1 mechanism is favoured over SN2 mechanism. Since CH3CH2OH is a poor nucleophile and ethanol is a protic solvent, we expect the reaction to proceed via SN1 mechanism leading to the formation of a racemic product.

The organic product is also shown in the second image attached.

3 0
3 years ago
Other questions:
  • What is the chemical formula for iron (III) bicarbonate?
    12·1 answer
  • 58.0 g of K2SO4 was dissolved in 500 g of water. What is the molality of this solution?
    10·1 answer
  • Why don't siblings look exactly alike
    5·1 answer
  • The chemical equation below shows the formation of aluminum oxide (Al2O3) from aluminum (Al) and oxygen (O2).
    7·1 answer
  • 6.10 g of a solid chemical reacts with a 10 g of a liquid chemical, the
    13·1 answer
  • The pic is the question! Please help
    6·2 answers
  • Trying to explain why a cactus needs little water to survive is an example of
    6·1 answer
  • Which describes the path of energy that a gas powered car uses to drive along a road?
    9·1 answer
  • Of the following, which is NOT a way to classify a biome?
    9·2 answers
  • Wasting my points here who wants them?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!