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
Lerok [7]
2 years ago
7

HELPPPPP

Chemistry
1 answer:
Darya [45]2 years ago
8 0

Answer:

Sound waves are faster than light waves when traveling through the air.

(This statement is NOT true)

or

Sound waves and electromagnetic waves are both needed to talk on a cell phone

Explanation:

Sound waves need a medium to travel through, but light does not.

Also, the statement "Sound waves and electromagnetic waves are both needed to talk on a cell phone" might also be NOT true, since, as far as I know, cellphone calls need radio and sound waves, not electromagnetic waves.

You might be interested in
If the total amount of energy required to change a substance to a different phase and temperature is positive, then does that me
diamong [38]
It would be A. Solid-gas temperature increases ( think of a block of ice, you have to increase temperature to make it melt, then the water would evaporate into a gas)
8 0
3 years ago
Because of the law of motion there are no limits on how fast the roller coaster can go true or false.
Lelechka [254]

Answer False

Explanation: Friction makes it stop at some point. For it to have an unlimited speed goes against beset is first law that states an object in motion with stay in motion unless acted upon by an external force, your force will be the friction of the wheels on the roller coaster

7 0
3 years ago
Describe the structure of the beryllium atom. In your answer make reference to the number of sub-atomic particles and where they
dusya [7]

Answer:

The nucleus consists of 4 protons (red) and 5 neutrons (orange). Four electrons (white) occupy available electron shells (rings). The stability of an element's outer (valence) electrons determines its chemical and physical properties. Subatomic particles are particles that are smaller than the atom. Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P."

hope this helped:)

brainliest?

8 0
3 years ago
When iron metal reacts with sulfuric acid, it produces iron (III) sulfate and hydrogen gas. Balance the equation: Fe + H2SO4 → F
gavmur [86]
<h3>Answer:</h3>
  1. Balanced Equation; 2Fe + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂
  2. Why balance?: To obey the law of conservation of mass
  3. Subscripts can not be changed, since they show the actual number of atoms of each element in a compound.
<h3>Explanation:</h3>
  • The balanced equation for the reaction between the iron metal and sulfuric acid to produces iron (III) sulfate and hydrogen gas is given by;

2Fe + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂

  • Balancing chemical equations ensures that they obey the law of conservation of mass which requires the mass of reactants and the mass of products to be equal.
  • Balancing is done by putting coefficients on reactants and products while not affecting the subscripts as subscripts show the actual number of atoms of an element in a compound.
6 0
3 years ago
Select the correct answer. A substance is followed by the symbol (/) in a chemical equation. What does the symbol represent?​
V125BC [204]

Answer:

Like Slash hopefully this helps

7 0
3 years ago
Other questions:
  • The specific heat capacity of oxygen is 918 J/kg °C. The specific heat capacity of water is 4181 J/kg °C. Which substance will r
    11·1 answer
  • Calculate the volume of dry co2 produced at body temperature (37 ∘c) and 0.960 atm when 24.0 g of glucose is consumed in this re
    7·1 answer
  • What is the mass of 1.0 x 10-3 mole of zn?
    8·2 answers
  • Please write a long paragraph about the structure of carbon-12. Include the following vocabulary: electron, proton, neutron, orb
    14·1 answer
  • Given the reactant side of the total ionic equation for the neutralization reaction of sodium hydroxide (NaOH) with hydrochloric
    6·1 answer
  • What are the ion concentrations in a 0.12 M solution of AlCl3? A) 0.12 M Al3+ ions and 0.040 M Cl- ions B) none of the answers C
    11·1 answer
  • 5,6-dimethyl-2-octyne
    12·1 answer
  • Is solar energy ecosystem services if so why
    15·1 answer
  • A 75 gram solid cube of mercury (II) oxide has a density of 2.4 x 103 kg/m3 .
    11·1 answer
  • What is the difference between the solid line and the dotted line?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!