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
Advocard [28]
3 years ago
5

1. An example of a polyatomic ion is:a) SO²-4b) Ca?c) O2d) NaCl​

Chemistry
1 answer:
zlopas [31]3 years ago
8 0

Answer:

A is the answer. Ca(calcium) is an element, O2 is a diatomic element, and NaCl is a compound composed of Na(sodium) and Cl(chlorine)

Explanation:

hopefully that helps!!!

You might be interested in
If I leave 750 mL of 0.75 M sodium chloride solution uncovered on a windowsill and 150 mL of the solvent evaporates, what will t
maks197457 [2]

the answer to your question is

M1V1=M2V2

V2=750-150=600 ml

0.75M*750 ml = M2*600

M2=0.75*750/600 ≈ 9.38 M


3 0
3 years ago
As a bond is broken in a compound the potential energy of the atoms generally does what
hichkok12 [17]
When a bond is broken that should be a type of reaction. When bonds are broken sometimes heat is released.
6 0
3 years ago
Calculate the rate constant at 200.°C for a reaction that has a rate constant of 8.30 × 10−4 s−1 at 90.°C and an activation ener
Sergeu [11.5K]

Answer:

23.0 s⁻¹ is rate constant

Explanation:

Using the Arrhenius equation:

k = A * e^(-Ea/RT)

Where k is rate constant

A is frequency factor (1.5x10¹¹s⁻¹)

Ea is activation energy = 55800J/mol

R is gas constant (8.314J/molK)

And T is absolute temperature (24°C + 273 = 297K)

Replacing:

k = 1.5x10¹¹s⁻¹ * e^(-55800J/mol/8.314J/molK*297K)

k = 1.5x10¹¹s⁻¹ * 1.53x10⁻¹⁰

k = 23.0 s⁻¹ is rate constant    i hope this helpsss

Explanation:

4 0
3 years ago
Group 17 is called the halogen family, and the group to its right is called the noble gases. How are the elements in these group
Firlakuza [10]

Answer: they all have 7  electrons they have different atom sizes

Explanation: hope it helps

7 0
3 years ago
We can drink water straight from the ocean without purifying it. <br><br><br><br> True<br><br> False
xenn [34]

False. The water would be toxic without purifying it before drinking.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Why is it important to learn about fuels and gases?
    14·1 answer
  • Only 10% of energy available at each trophic level moves on to the next level. What happens to the other 90%
    7·1 answer
  • Is the work correct?
    15·1 answer
  • 1. Which of the following is not true of a covalent compound?
    6·1 answer
  • The diagram below shows the different phase transitions that occur in matter. Three bars are shown labeled Solid, Liquid, and Ga
    13·1 answer
  • Heating devices can be made by passing an electric current through a conductor of:
    5·1 answer
  • Electrons in Atoms
    9·2 answers
  • How many moles of KBr are present in 1000 ml of a 0.02 M KBr solution?
    6·1 answer
  • A student mixed 75.0 mL of water containing 0.75 mol HCl at 25°C with 75.0 mL of water containing
    10·2 answers
  • Write a balanced equation for the complete oxidation reaction that occurs when glucose (C6H12O6) reacts with oxygen. Use the sma
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!