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
Digiron [165]
3 years ago
15

A student does not observe a change when holding a test tube in a flame. However, a change is expected. What is the most likely

reason for this?
Chemistry
2 answers:
love history [14]3 years ago
5 0
Heat is energy, and that energy would eventually cause the object to undergo a phase change.
astraxan [27]3 years ago
5 0

D. The reactants were not heated long enough.

You might be interested in
How objects with different masses and volumes have the same density?​
AURORKA [14]

Answer:

mass and volume are independent. Two objects with the same volume can have different masses hence they can have different densities

Explanation:

The mass of atoms their size and how they are arranged determine the density

6 0
3 years ago
What is the periodic table a list of
barxatty [35]

Answer:

i think c should be ur answer

5 0
3 years ago
Find the number of Grams
zaharov [31]

Answer: 462 g

Explanation:molar mass is M= 63.55 +2·(12.01+14.01)= 115.59 g/mol.

Mass m= n·M = 4.0 mol·115.59 g/mol= 462.36 g

8 0
3 years ago
Determine the rate of a reaction that follows the rate law rate = k a m b i where
ikadub [295]
(missing part of your question):
when we have K = 1 x 10^-2 and [A] = 2 M & [B] = 3M & m= 2 & i = 1
So when the rate = K[A]^m [B]^i
and when we have m + i = 3 so the order of this reaction is 3 So the unit of K is L^2.mol^-2S^-1
So by substitution:
∴ the rate = (1x 10 ^-2 L^-2.mol^-2S^-1)*(2 mol.L^-1)^2*(3mol.L^-1)
                 = 0.12 mol.L^-1.S^-1
6 0
3 years ago
True or False a chemical formula is a representation of the smallest unit of a compound?
trapecia [35]

Answer:

true. I think

Explanation:

A chemical formula shows the atoms a molecule is made of.

3 0
3 years ago
Other questions:
  • A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. The cylinder
    15·1 answer
  • Where are most organisms that live in the ocean found ? why ?
    5·1 answer
  • What is a hypothesis
    8·2 answers
  • When cobalt(II) chloride is added to pure water, the Co2+ ions are either hydrated to give a pink color, or combined with chlori
    15·1 answer
  • Heating glucose, a monosaccharide sugar, in the presence of excess oxygen produces carbon dioxide gas and water vapor. Balance t
    15·1 answer
  • 79. Methane, the chief component of natural gas, burns in oxygen according to the equation
    7·1 answer
  • Which of the following is equal to Avogadro's number?​
    6·1 answer
  • A truck uses 6 kg of fuel which undergoes complete combustion. The heat produced during the complete combustion was measured to
    6·1 answer
  • Increasing the concentration of a reactant shifts the position of chemical equilibrium towards formation of more products. What
    6·1 answer
  • Ice has a density of 0.92g/cm3. It will float in water.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!