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
goldfiish [28.3K]
2 years ago
6

What are the 4 physical changes you can observe?

Chemistry
2 answers:
RUDIKE [14]2 years ago
8 0
1. ice melting 

<span>2. temperature going down at night </span>

<span>3. water evaporating (like a towel drying out) or water drop on the sink </span>

<span>4. dew forming on the mirror after a shower </span>
iren2701 [21]2 years ago
6 0
1. ice melting

2. ripping paper

3. dew on mirror because of shower

4. breaking glass

You might be interested in
In subsequent experiments you determine that the compound is iron (II) chloride. Which of the following properties would you als
Naddika [18.5K]

Answer:

b. Conducts electricity when dissolved in water

Explanation:

Iron(II) chloride, is the chemical compound with formula FeCl2.

It is a solid with a high melting point of about 677 degree Celsius or 950 K when in anhydrous form but have lower melting point in hydrated form.

The compound is often off-white. FeCl2 crystallizes from water as the greenish tetrahydrate, which is the form that is most commonly encountered in the laboratory.

There is also a dihydrate. The compound is highly soluble in water, giving pale green solutions.

7 0
3 years ago
Which has more mass: an armful of feathers or an armful of lead? which has more volume: a kilogram of feathers or a kilogram of
valina [46]
Mass is related to weight. It measures the resistance of the substance to acceleration when a net force is applied.
Therefore: armful of lead has more mass

volume measures the amount of 3-dimensional space that an object occupies.
Therefore: kilogram of feather has more volume as it is less dense.

density is the mass per unit volume. Since armful of lead has more mass than a handful of feathers, while kilogram of feather has more volume than a kilogram of lead.
Therefore: kilogram of lead has higher density.
8 0
3 years ago
What is defined as the basic unit in the metric system that describes a quality
Bingel [31]

Answer:

They are:

Length - meter (m)

Time - second (s)

Amount of substance - mole (mole)

Electric current - ampere (A)

Temperature - kelvin (K)

Luminous intensity - candela (cd)

Mass - kilogram (kg)

3 0
3 years ago
What is the temperature of 0.5 moles of water vapor that occupies 120 dm3 and applies a pressure of 15,000 Pa to its container?
MArishka [77]
Use the ideal gas law:

PV = nRT

so, T = PV / nR

n=0.5
V= 120 dm^3 = 120 L  (1 dm^3 = 1 L)
R = 1/12
P = 15,000 Pa =  0.147 atm     (1 pa = 9.86 10^{-6} )

Put the values:

T = PV / nR
T = (0.147) (120) / (0.5) (1/12)
T= 426 K
6 0
3 years ago
In a hydrogen bomb, hydrogen is converted into:
Alona [7]

Answer:

helium ................

8 0
2 years ago
Other questions:
  • After swimming in the pool on a very hot day, Sarah had a glass of ice water. Over time, the water on her skin evaporated, and t
    11·2 answers
  • The periodic law states that the physical and chemical properties of elements are periodic functions of their?
    14·1 answer
  • What are the three states in which most matter occurs
    13·2 answers
  • Saltpeter is a compound made of potassium(K), nitrogen(N), and oxygen(O). Every 100.0g of saltpeter contains 38.67g potassium an
    14·1 answer
  • In a __________ change the identity of the substance is
    11·1 answer
  • (Timed) What part of an atom involved in a chemical reaction?
    10·1 answer
  • Which substance has a coefficient of 2 when you balance the equation for this redox reaction? cu(s) + hno3(aq) → cu(no3)2(aq) +
    7·1 answer
  • The rate constant for the first-order decomposition of n2o is 3.40 s-1. what is the half-life of the decomposition?
    12·2 answers
  • This refers to the most powerful means of communicating confidence and conviction A.Posture B.eye contact C.body movement
    15·1 answer
  • All the bases are not alkali ​why
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!