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
mr Goodwill [35]
4 years ago
12

Select the correct answer.

Chemistry
2 answers:
Marina CMI [18]4 years ago
5 0

Answer:c

Explanation:

adelina 88 [10]4 years ago
4 0

Answer:

the electron releases engery in the form of light

Explanation:

it's science i don't know how to explain sorry

You might be interested in
Properties of a longitudinal wave
AleksAgata [21]
In longitudinal waves, the oscillations are along the same direction as the direction of travel and energy transfer.
Sound waves and waves in a stretched spring are longitudinal waves. P waves (relatively fast moving longitudinal seismic waves that travel through liquids and solids) are also longitudinal waves.
Longitudinal waves show area of compression and rarefaction. In the animation, the areas of compression are where the parts of the spring are close together, while the areas of rarefaction are where they are far apart.
8 0
4 years ago
Convert 4.50 moles of Fe to atoms of Fe
olya-2409 [2.1K]
Each mole of a substance contains 6.02 x 10²³ particles
Atoms of Fe = 4.5 x 6.02 x 10²³
= 2.709 x 10²⁹ atoms
7 0
3 years ago
Please answer fast do in 5 mins Body System used for support, movement, structure and makes red blood cells
pochemuha

Explanation:

The Skeletal System (A).

7 0
3 years ago
Propenoic acid is an unsaturated carboxylic acid. Describe how you could show
Anestetic [448]

Answer:

Tests for unsaturation involves addition across the multiple bonds in the unsaturated compound.

Explanation:

In organic chemistry, we define an unsaturated compound as any compound that contains a double or triple bond. These multiple bonds are also known as pi bonds.

There are two major tests for unsaturation which shall both be discussed here.

The first test for unsaturation is by the use of bromine water. The unknown sample is passed through a solution of bromine water which normally appears reddish brown. The bromine water becomes decolorized due to addition of bromine across the multiple bond. This is a standard test for unsaturation.

Secondly, unsaturated compounds decoulourize a solution of potassium permanganate when passed through it. This alone can not be used as a distinctive test for unsaturation.

Propenoic acid will give a positive test to the both reagents showing that it contains multiple bonds, in this particular instance, a double bond.

4 0
3 years ago
The pH of a solution is 8.83±0.048.83±0.04 . What is the concentration of H+H+ in the solution and its absolute uncertainty?
slava [35]

Answer:

The concentration of H^{+} is 1.48  × 10^{-9} M

The absolute uncertainty of [{H^{+}] is ±0.12 × 10^{-9} M

The concentration of H^{+} is written as 1.48(±0.12) × 10^{-9} M

Explanation:

The pH of a solution is given by the formula below

pH = -log_{10}[{H^{+}]

∴ [H^{+}] = 10^{-pH}

where [{H^{+}] is the H^{+} concentration

From the question,

pH = 8.83±0.04

That is,

pH =8.83 and the uncertainty is ±0.04

First, we will determine [{H^{+}] from

[H^{+}] = 10^{-pH}

[{H^{+}] = 10^{-8.83}

[{H^{+}] = 1.4791 × 10^{-9} M

[{H^{+}] = 1.48 × 10^{-9} M

The concentration of H^{+} is 1.48  × 10^{-9} M

The uncertainty of [{H^{+}]  ( U_{[H^{+}] } ) from the equation [H^{+}] = 10^{-pH} is

U_{[H^{+}] } = 2.303 \\ × {[H^{+}] } × U_{pH }

Where U_{[H^{+}] } is the uncertainty of [{H^{+}]

U_{pH } is the uncertainty of the pH

Hence,

U_{[H^{+}] } = 2.303 × 1.4791 × 10^{-9} × 0.04

U_{[H^{+}] } = 1.36 × 10^{-10} M

U_{[H^{+}] } = 0.12 × 10^{-9} M

Hence, the absolute uncertainty of [{H^{+}] is ±0.12 × 10^{-9} M

6 0
4 years ago
Other questions:
  • What is the compound formula for Ba2 and NO3–?
    15·2 answers
  • List down two applications of isotopes​
    8·2 answers
  • What is 1 +1 (a) 11 (b) 3 (c) 6 (d) 2
    7·2 answers
  • Determine the mechanical energy of this object:
    9·2 answers
  • Which of the following isotopes is not commonly used for dating objects? a. carbon-14 b. phosphorus-32 c. potassium-40 d. rubidi
    14·2 answers
  • The tyndall effect is used to detect
    15·1 answer
  • The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO
    12·1 answer
  • What is the chemical symbol for copper?
    14·1 answer
  • Calcium+Hydrochloric acid=
    5·2 answers
  • Which material would take the longest to cool off once heated?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!