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
Andru [333]
3 years ago
7

The substances present before a chemical reaction takes place are called?

Chemistry
2 answers:
andrew11 [14]3 years ago
5 0
The substances present before the reaction are the reactants.  (As the reaction goes through, the substances that are produced are called the products of the reaction).
jeka57 [31]3 years ago
5 0
Reactants. just did the penn foster exam
You might be interested in
Roberto and his dad drove from town A to town B taking the long way, ate lunch and then came back using a
alina1380 [7]

Answer:c which is 70

Explanation:

i took the test and got it right

3 0
3 years ago
Read 2 more answers
In this experiment, you need to examine the idea of
Alex17521 [72]

Answer:

How stable is the matter that the energy is transferring to? How volatile is the thermal Resistance?

6 0
3 years ago
Read 2 more answers
A solution was found to have a 15.6 % transmittance at 500 nm, its wavelength of maximum absorption, using a cell with a path le
Gnesinka [82]

For the absorbance of the solution in a 1.00 cm cell at 500 nm  is mathematically given as

A’ = 0.16138

<h3>What is the absorbance of the solution in a 1.00 cm cell at 500 nm?</h3>

Absorbance (A) 2 – log (%T) = 2 – log (15.6) = 0.8069

Generally, the equation for the Beer’s law is mathematically given as

A = ε*c*l

0.8069 = ε*c*(5.00 )

ε*c = 0.16138 cm-1

then for when ε*c is constant

l’ = 1.00

A’ = (0.16138 cm-1)*(1.00 cm)

A’ = 0.16138

In conclusion, the absorbance of the solution in a 1.00 cm cell at 500 nm is

A’ = 0.16138

Read more about Wavelength

brainly.com/question/3004869

7 0
2 years ago
Why is it NOT possible for ONE particle (atom/ion/molecule) to be classified as a particular phase, or state, of matter?
Agata [3.3K]

Answer:

because I said and I'm the boss

6 0
3 years ago
a gas in a container with a fixed volume was originally at a pressure of 317kpa and a temperature of 154k. what is the new press
goldfiish [28.3K]
<h2>Hello!</h2>

The answer is: 4.77atm

<h2>Why?</h2>

Since there's a fixed volume, we can use the the Gay-Lussac's Law which stablish a relation between the pressure and the temperature:

\frac{P}{T}=k

<em>P</em> is the volume of the gas

<em>t</em> is the temperature of the gas

<em>k </em>is the proportionality constant

We also have the following equation:

\frac{P1}{T1}=\frac{P2}{T2}

Where:

P2=\frac{P1*T2}{T1}=\frac{317kPa*235K}{154K}=483.73kPa

We are asked to find the pressure in atm, so we must convert 483.73kPa to atm:

1kPa=0.009869atm

Then,

483.733kPa*\frac{0.009869atm}{1kPa}=4.77atm

Have a nice day!

8 0
3 years ago
Other questions:
  • What does the letters say acnsrl spgei<br> clue: a tool used to measure force!
    9·1 answer
  • Diffusion occurs due to differences in _____. A) size B) concentration C) temperature D) collisions
    8·1 answer
  • As a technician in a large pharmaceutical research firm, you need to produce 250. mL of a potassium dihydrogen phosphate buffer
    10·1 answer
  • Does anyone know how to do this?
    12·1 answer
  • Rate law equation The rate of a chemical reaction depends on the concentrations of the reactants. For the general reaction betwe
    5·1 answer
  • I’m stuck on number 2
    13·2 answers
  • Calculate the pH of the following?
    5·1 answer
  • HELP I DONT KNOW HOW TO DO THIS !!
    12·1 answer
  • Metal or Non-metal?
    11·1 answer
  • Saturn has a diameter of 74,898 miles. What is its diameter in kilometers? (1
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!