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
Ira Lisetskai [31]
3 years ago
13

Evaluate this statement: Substances are made of two or more types of elements.

Chemistry
1 answer:
wolverine [178]3 years ago
6 0

A MOLECULE IS MADE OF TWO OR MORE ELEMENTS CHEMICALLY COMBINED IS KNOWN AS A COMPUND.

A MOLECULE IS MADE OF TWO ATOMS IS JUST AN ELEMENT.

A MOLECULE MADE OF TWO OR MORE ELEMENTS IS KNOWN AS A COMPUND.

You might be interested in
Need to know how to do chemical reactions
melomori [17]
Chemical reactions happen by them self like if you hear baking soda and it makes a gas.
8 0
3 years ago
Formulate a sample scientific hypothesis
Andrei [34K]
<span>If the water faucet is opened, then the amount of water flowing will increase. </span>
3 0
3 years ago
Read 2 more answers
What is the pH of 0.26 M ammonium ion? NH4+(aq) + H2O(1) NH3(aq) + H30* (aq) a. 4.33 b.9.25 c. 3.87 d. 4.92 e. 4.75
choli [55]

Answer:

b) pH = 9.25

Explanation:

  • NH4+(aq)  +  H2O(l)  ↔  NH3(aq)  +  H3O+(aq)
  • NH3 + H2O ↔ NH4+  +  OH-
  • 2 H2O ↔ H3O+  +  OH-

⇒ Kb = [ NH4+ ] * [ OH- ] / [ NH3 ] = 1.86 E-5......from literature

mass balance NH4+:

⇒ M NH4+ = [ NH4+ ] - [ OH- ]

∴ [ NH3 ] ≅ M NH4+ = 0.26 M

⇒ Kb = (( 0.26 + [ OH- ] )) * [ OH- ] / 0.26 = 1.86 E-5

⇒ 0.26 [ OH-] + [ OH- ]² = 4.836 E-6

⇒ [ OH- ]² + 0.26 [ OH- ] - 4.836 E-6 = 0

⇒ [ OH- ] = 1.859 E-5 M

⇒ pOH = - Log ( 1.859 E-5 )

⇒ pOH = 4.7305

⇒ pH = 14 - pOH = 9.269

6 0
3 years ago
The metal is easily shaped and does not ....... with water
xz_007 [3.2K]

the metal is easily shaped and does not contract with water

3 0
3 years ago
Read 2 more answers
Which set of elements has the MOST similar physical and chemical properties?
Nana76 [90]
A k ca sf obviously
7 0
3 years ago
Other questions:
  • How many substances does a pure piece of matter contain? <br> A. 0 <br> B. 1 <br> C. 2 <br> D. 3
    14·1 answer
  • The reaction system
    5·1 answer
  • Hey, I need help with this but, can someone simplify?
    12·1 answer
  • Help! Will mark brainliest! Explain why a mechanical wave does not exist in a vacuum.
    7·1 answer
  • An irregular shaped sample of aluminum is put on a balance and found
    15·1 answer
  • How many moles of hydrogen are produced from the reaction of 50.0 g of Mg and the equivalent of 75 g of HCl?
    13·1 answer
  • Similar figures have the same ______ but different ______.
    10·2 answers
  • Use the drop-down menus to complete each statement.
    9·1 answer
  • Girls are usually completely physically mature by _____ years old.
    14·2 answers
  • 6. Which change to a population would cause
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!