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
Elza [17]
3 years ago
6

Which of the following summertime activities consists solely of physical change?

Chemistry
1 answer:
Evgen [1.6K]3 years ago
5 0
A: making s sandcastle. This is because water and sand is only a mixture, so they do not react with each other. All the rest include chemical reactions!
You might be interested in
A metal cube has a mass of 20 g and a volume of 5 ml. What is the density? Is the cube made of pure aluminum? Explain your answe
Shtirlitz [24]

Explanation:

Given that,

Mass of metal cube, m = 20 g

Volume of cube, V =5 mL

We need to find the density of the cube. Mass per unit volume equals density.

d=\dfrac{m}{V}\\\\d=\dfrac{20\ g}{5\ mL}\\\\d=4\ g/mL

So, the density of the cube is 4 g/ml.

We know that the density of Aluminium is 4 g/mL.

So, the cube is not Aluminium cube.

3 0
3 years ago
2 NH3 + 3 CuO →3 Cu + N₂ + 3 H₂O
Tatiana [17]

40.1g of nitrogen gas is produced.

The equation given is

2 NH₃ + 3 CuO →3 Cu + N₂ + 3 H₂O

This equation is already balanced.

When 3 moles of CuO are consumed, 1 mole of nitrogen gas is produced.

We get 1 mole of nitrogen from 3 moles of copper oxide.

We need to find the number of moles of nitrogen gas produced when 4.3 moles of copper oxide are consumed.

4.3/3 x 1 = 1.433 mols

  • 1.433 mols of nitrogen gas are produced
  • The molar mass of nitrogen gas is 14+14 = 28g
  • The amount of nitrogen gas produced in grams is 28x1.433 = 40.1g

40.1g of nitrogen gas can be made when 4.3 moles of CuO are consumed.

Learn more about molarity here:

brainly.com/question/24305514

#SPJ10

5 0
1 year ago
What are the products of a neutralization reaction?
katovenus [111]

Answer:

Neutralization reactions occur when two reactants, an acid and a base, combine to form the products salt and water. So OPTION B IS CORRECT

Explanation:

5 0
3 years ago
Read 2 more answers
How does energy change when it moves?? PLEASE ANSWER ASAP
Usimov [2.4K]

Answer:

When objects collide, energy can be transferred from one object to another, thereby changing their motion. Energy can also be transferred from place to place by electric currents, which can then be used locally to produce motion, sound, heat, or light.

4 0
2 years ago
What is the arrangement of atoms within a molecule called?
Anna007 [38]
The arrangement of atoms within a molecule is called molecular structure. It <span> is the three-dimensional arrangement of the atoms that constitute a </span>molecule<span>. It determines several properties of a substance. Hope this answers the question. Have a nice day.</span>
5 0
3 years ago
Other questions:
  • The act of sticking to other substances
    15·1 answer
  • How many atoms of hydrogen are there in 3.0kg of ethane
    8·1 answer
  • Dr. Hakoda is studying tsunamis—large waves that can reach heights of 1,700 feet. Tsunamis are often caused when large chunks of
    8·2 answers
  • ¿Cuál(es) de las siguientes propiedades aumentan a más Z en un grupo?
    5·1 answer
  • 2. The empirical formula of a molecule is CH2O. In an experiment, the molar mass of the molecule was determined to be 360.3 g/mo
    6·1 answer
  • Magnesium metal a gray solid, is heated in a crucble in the presence of oxygen
    14·1 answer
  • Hello po pa help hehehehe​
    7·2 answers
  • What volume in mL of 0.300 M NaF would be required to make a 0.0450 M solution of NaF when diluted to 250.0 mL with water?
    10·1 answer
  • Which statement about quantum numbers is NOT
    14·1 answer
  • Consider the decomposition of red calx of mercury (HgO) into its elements as follows:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!