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
Aleksandr-060686 [28]
3 years ago
5

What is the measure of angle QCR?

Chemistry
2 answers:
bezimeni [28]3 years ago
7 0
110-50=60 the measurements of QCR=60
Hope this helps gave a nice day
mrs_skeptik [129]3 years ago
7 0
Hello,

So they tell us the angle PCR is 110 degrees, and we know that angle PCQ is 50, so let's set up an equation. We don't know what angle QCR is, so that'll represent "x":

50 + x = 110

From here, subtract 50 from both sides so that "x" can be by itself:

x = 60, so the angle of QCR is 60 degrees.

Hope this helps!

May
You might be interested in
Panuto: Punan ang talaan sa ibaba at suriing mabuti ang sarili upang higit mong
Novay_Z [31]
The answer is 2

Hipe that helps
4 0
3 years ago
PLEASe help. How many ions? With picture.
Likurg_2 [28]
Since this equation is balanced, we know that the law of conversation of mass id applied, and we could calculate easily. 

Na=  2
NO3= 2
Ca= 1
<span>Cl= 1</span>

5 0
3 years ago
What is an electrochemical cell?
vredina [299]

A. Two electrodes separated by an electrolyte that can generate an electrical current.

3 0
3 years ago
Read 2 more answers
HELPP
Natasha_Volkova [10]
I’m pretty sure it’s D.increases the activation energy for a reaction.
4 0
3 years ago
A sample of carbon dioxide occupies a 5.13 dm3 container at STP. What is the volume of the gas at a pressure of 286.5 kPa and a
suter [353]

Considering the ideal gas law and STP conditions, the volume of the gas at a pressure of 286.5 kPa and a temperature of 12.9°C is 1.8987 L.

<h3>Definition of STP condition</h3>

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

<h3>Ideal gas law</h3>

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

  • P is the gas pressure.
  • V is the volume that occupies.
  • T is its temperature.
  • R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.
  • n is the number of moles of the gas.  

<h3>Volume of gas</h3>

In first place, you can apply the following rule of three: if by definition of STP conditions 22.4 L are occupied by 1 mole of carbon dioxide, 5.13 L (5.13 dm³= 5.13 L, being 1 dm³= 1 L) are occupied by how many moles of carbon dioxide?

amount of moles of carbon dioxide=\frac{5.13 Lx1 mole of carbon dioxide}{22.4 L}

<u><em>amount of moles of carbon dioxide= 0.229 moles</em></u>

Then, you know:

  • P= 286.5 kPa= 2.8275352 atm (being 1 kPa= 0.00986923 atm)
  • V= ?
  • T= 12.9 C= 285.9 K (being 0°C= 273 K)
  • R= 0.082 \frac{atmL}{mol K}
  • n= 0.229 moles

Replacing in the ideal gas law:

2.8275352 atm× V = 0.229 moles×0.082 \frac{atmL}{mol K} × 285.9 K

Solving:

V= (0.229 moles×0.082 \frac{atmL}{mol K} × 285.9 K)÷ 2.8275352 atm

<u><em>V= 1.8987 L</em></u>

Finally, the volume of the gas at a pressure of 286.5 kPa and a temperature of 12.9°C is 1.8987 L.

Learn more about

STP conditions:

brainly.com/question/26364483

brainly.com/question/8846039

brainly.com/question/1186356

the ideal gas law:

brainly.com/question/4147359

#SPJ1

5 0
2 years ago
Other questions:
  • Is distilled water homogeneous or heterogeneous?
    7·1 answer
  • The empirical formula of a compound is CH. At 200 degree C, 0.145 g of this compound occupies 97.2 mL at a pressure of 0.74 atm.
    11·1 answer
  • Zinc will displace copper from a solution of copper sulfate, and magnesium will displace zinc from a solution of zinc sulfate. W
    12·1 answer
  • The energy that is transferred due to a temperature difference
    15·1 answer
  • What is an isotope? How does one isotope differ from another isotope
    9·2 answers
  • How does particle model explain a change of state of matter?
    7·1 answer
  • Alisha organizes her data about the element lead into a table.
    12·2 answers
  • Is an isotope more or less stable the longer the half life?
    7·1 answer
  • A certain element has only two naturally occurring isotopes: one with 18 neutrons and the other with 20 neutrons. The element fo
    11·1 answer
  • I would really appreciate someone could answer this question for mee! I will mark brainliest aswell. :)
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!