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
KATRIN_1 [288]
2 years ago
7

Amanda dissolves some sugar in water in a beaker. She allows the water to evaporate and notices that solid sugar remains in the

bottom of the beaker. What two pieces of evidence can be provided to show that this is a physical change?
Chemistry
1 answer:
3241004551 [841]2 years ago
6 0

Answer:

evaporation means the state of the water went from liquid to gas which is a physical change. the sugar is still in the beaker which means its chemical properties did not change.

Explanation:

You might be interested in
If 0.60 L of a solution contains 6.6 g of NaBr, what is its molar concentration?
-BARSIC- [3]

Answer:

Molarity = moles ÷ liters

to get moles of NaBr divide grams of NaBr by its molar mass (mass of Na + mass of Bromine)

Na = 22.989769

Br = 79.904

molar mass of NaBr = 102.893769

6.6g ÷ 102.893769 = 0.064143826 moles of NaBr

0.064143826 moles ÷ 0.60 liters = 0.1069 molar concentration or 11 %

7 0
3 years ago
I have a cylinder sitting in my lab that contains 0.7500 L of gas, and it's pressure is 16.24 psi. If I relieve the cylinder and
Ira Lisetskai [31]
89998aaa 2.3 cents coin in 2 minutes
3 0
3 years ago
Read 2 more answers
How many moles are in 8.90 X 10^24 atoms of Na?
mixas84 [53]

Answer:

1.48 x 10^47 mol of Na

Explanation:

8.90 x 10^24 atoms of Na (1 mol of Na/6.022 x 10^23 atoms of Na)=

1.48 x 10^47 mol of Na

5 0
3 years ago
When a negatively charged species is most appropriately depicted as a hybrid of several resonance forms, the negative charge pre
Varvara68 [4.7K]

Answer:

True

Explanation:

Resonance is a concept that was introduced when it was not possible to represent a compound with a single Lewis structure. Lewis formulas represent localized electrons, either shared by two atoms in a covalent bond or as non-shared electrons belonging to a given atom. Certain organic compounds, especially those containing multiple bonds can be described by more than one Lewis structure. In these cases, the true Lewis structure has an electronic distribution that is a "hybrid" of all possible Lewis structures of that molecule. Each of Lewis's structures is known as resonance or canonical forms and they are related to each other by a double-headed arrow, where all possible positions of electrons in that molecule are represented.

This type of compound has multiple bonds (double or triple) where electrons are not fixed, but move quickly between atoms, "resonating" between the different Lewis structures. For this reason, when a resonance hybrid has a negative charge, this charge moves between the different resonant structures.

Many times, an intermediate Lewis structure is drawn, with dotted lines, simulating approaching the real structure of the compound, and where this phenomenon of electron and charge mobility can be observed. For example, as we can observe in the ozone resonance image.

5 0
3 years ago
Instructions: After doing research to answer the objective question below, write a CER. Be sure to use credible sources (no wiki
Anon25 [30]
No Eaton segura lol lo sieto
3 0
4 years ago
Other questions:
  • How many grams of aluminum oxide would form if 15.2 moles of aluminum burned
    7·1 answer
  • Which best describes the importance of the microscope to the development of the cell theory?
    15·1 answer
  • Atoms are very small. Approximately how many atoms would it take to
    5·1 answer
  • In order to make a hot pack, do you want to use a chemical that absorbs energy or
    7·1 answer
  • Iron combines with 5 g of Copper (1) Nitrate to form 6.01 g of Iron (1) Nitrate and 0.4 g of copper
    5·1 answer
  • Does mitosis begin with a diploid cell?​
    9·1 answer
  • Which of the following molecules is least soluble in water?​
    6·1 answer
  • I really need help please.
    8·1 answer
  • If the empirical formula of an organic compound is CH20, then the molecular mass of the compound could be
    6·1 answer
  • How many Si atoms are there in 1.00 g of silicon
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!