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
ludmilkaskok [199]
3 years ago
15

Student mixes 5 g of sand into a beaker of 20 g of water. Is this a physical or chemical change-why?

Chemistry
1 answer:
oee [108]3 years ago
8 0
Physical change. the sand is not dissolving into the water, but simply finding a place in it.
You might be interested in
Which is a characteristic of a homogeneous mixture that is a liquid?
lorasvet [3.4K]
For one a homogenous mixture cannot be separated using filtration. Hope this helps:)
7 0
3 years ago
Read 2 more answers
Phosphorus oxychloride has the chemical formula POCl3, with P as the central atom. In order to minimize formal charge, how many
Elina [12.6K]

Answer:

Phosphorus makes 5 bonds with other atoms

Explanation:

POCl_{3} has total 32 number of valence electrons (P has 5 , O has 6 and Cl has 7 valence electrons).

These valence electrons are used to draw Lewis structure of POCl_{3}.

Formal charge on an atom = (no. of valence electrons of the atom)-(no. of covalent bonds attached to the atom)-(no. of electrons in lone pair of the atom)

Applying octet rule (atoms have eight electrons in their valence shell) and minimizing formal charge of POCl_{3}, it has been found that P makes total 5 bonds with rest of the atoms.

Lewis structure of POCl_{3} along with formal charge (in parentheses) has been given below.

6 0
2 years ago
I appreciate the help
hram777 [196]

Answer:

yes the answer is true because heat changes duriing epalthy change

7 0
3 years ago
Read 2 more answers
Two gasses in the air that cause rusting
Korolek [52]

Answer:

oxygen and Hydrogen

Explanation:

Oxygen and Hydrogen causes rusting on metals after combining with moisture

6 0
2 years ago
Read 2 more answers
the BF3 molecule is planar. the attachment of a fluoride ion to the boron in BF3 through a coordinate covalent bond, creates the
charle [14.2K]
The shape here is tetrahedral.The central atom here is located at the center of the attached substituents (4) which are placed at the corner of the tetrahedron. The bond angles here is 109.4712206° ≈ 109.5° given that all attachments are of the same kind like methane. <span>

</span>
3 0
3 years ago
Read 2 more answers
Other questions:
  • A sample of neon occupies a volume of 375 ml at stp. What will be the volume of neon If the pressure is reduced to 90.0 KPA?
    12·2 answers
  • What do organisms do with the organic carbon
    11·1 answer
  • What is the difference between potential and kinetic energy
    8·2 answers
  • Consider the following mechanism for the reaction between nitric oxide and ozone:
    12·1 answer
  • In which environment would primary succession occur?
    6·2 answers
  • A train travels 65 km in three hours and then 52 km in two hours. What is its average speed?
    10·1 answer
  • P is the pressure in atmospheres (atm), V is the volume in liters (L), n is the number of moles, R is the gas constant (0.0821 L
    8·1 answer
  • What is the charge of an aluminum ion? (2 points) Select one: a. 2+ b. 3+ c. 2- d. 3-
    8·1 answer
  • Calculate the new boiling point of a solution if 10.00 g of a non-ionizing compound (C3H5(OH)3) is dissolved in 90.00 g of H2O.
    5·1 answer
  • Find the pH of the equivalence point(s) and the volume (mL) of 0.0372 M NaOH needed to reach the point(s) in titrations of(a) 42
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!