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
Cloud [144]
2 years ago
11

The type of measurement that involves observing and describing the events of an experiment is called:

Chemistry
1 answer:
N76 [4]2 years ago
3 0

Answer:

Data collection/ analysis

I think. Its part of the scientific method

You might be interested in
Which of the following choices represents elements with the most similar
matrenka [14]

Answer:

Explanation:

F Cl Br belongs to the Same group

5 0
3 years ago
Which statement correctly compares ice and liquid water?
Evgen [1.6K]

Answer:

B. Particles of liquid water have more energy than particles of ice.

Explanation:

We can work this out through eliminating the wrong statements.

A. Both liquid water and ice have definite shapes.

This is wrong because, as stated in the question, water is a liquid, and one of the properties of liquids is that they change shape to fit the shape of their container. If it changes shape, it does not have a "definite" shape.

B. Particles of liquid water have more energy than particles of ice.

This is correct, and here is why. There are 3 states of matter: solid, liquid and gas. As you apply heat energy to an object at each state, the particles receive more energy and can move around more (this is kinetic energy). In the case of liquid (water) and solid (ice), particles in solids do not have much energy and stay in rigid formations. They do vibrate slightly, but only on the spot (this is what gives solids "definite" shapes). On the other hand, particles in liquids have more energy than particles in solids, which means that they can move more (more kinetic ENERGY) and do not stay in formations (this is why they do not have "definite" shapes). Therefore, particles in liquids (water) have more energy than particles in solids (ice), and this statement is correct.

C. Liquid water has a lower temperature than ice.

This is wrong because liquids have more energy than solids. As explained earlier, the reason why particles in liquids have more energy is because more HEAT energy has been applied to them. In the same way, solids have less energy because less HEAT energy has been applied to them. Less heat means a lower temperature. (Also you can use common sense for this one, ice feels colder than liquid water, right?)

D. Ice has a definite volume, but liquid water does not.

This is wrong because of the law of conservation of mass. This law states that particles (or matter or volume) cannot be created or destroyed. When ice melts and becomes liquid water, it has not lost volume: the particles have just gained more energy. This question is most likely there to confuse you, because all substances have definite volumes.

I hope this helps!

5 0
2 years ago
The density of aluminum is 2.70 g/cm3. Apiece of aluminum foil that is 1000 cm on each side has a mass of 440. mg. How thick is
MissTica
Mass/volume = density
mass = (440 mg)*(1g)/(1000mg) = 0.440g
volume = (1000cm)(1000cm)(t)
where t = thickness
density = 2.70 g/cm^3 = (0.440g)/((1000cm)(1000cm)(t))

multiply both sides by 't' and divide both sides by (2.70g/cm^3)

t = (0.440) / ((1000cm)(1000cm)(2.70)) = 1.629x10^-7 cm

t = (1.629 x 10^-7 cm)*(1000000 micrometers)/(1 cm) = 0.1629 micrometers

Answer is t = 0.1629 micrometers
8 0
3 years ago
Periodic trends are examined by looking down the _ of elements or by looking across the _ of the elements
nikklg [1K]

Answer: yo sorry this a hard one

Explanation:

bro

6 0
2 years ago
A compound is made up of at least
solmaris [256]
Two or more different elements
5 0
3 years ago
Other questions:
  • What is the relationship between isotopes, mass number, neutrons?
    10·1 answer
  • Exactly 1.5 g of a fuel burns under conditions of constant pressure and then, in a
    5·1 answer
  • NEED NOW!
    8·2 answers
  • Across<br> 1. the alkali metal in Period 4
    9·1 answer
  • A certain shade of blue has a frequency of 7.05 × 1014 hz. What is the energy of exactly one photon of this light?
    7·1 answer
  • If 76.4 grams of ammonium chloride are used, how many grams of water are
    11·1 answer
  • I have it attached plz help ASAP
    14·1 answer
  • 11. Is this compound an acid or a base: H20?<br> both<br> base<br> neutral<br> acid
    6·2 answers
  • What is the molar mass of the unknown gas?
    9·1 answer
  • When a candle burns what changes are observed?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!