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
trasher [3.6K]
3 years ago
10

A scientist has a new cough medicine by giving it to a group of course the scientist gives another group called the liquid and t

ells them cough medicine the people and goods are women between the ages of 20 and 30 you never a are in good health identify the experimental group and control group and it controls explain your decision
Chemistry
1 answer:
Liula [17]3 years ago
6 0

Answer:50

Explanation:

Just look it up

You might be interested in
Indicates the kind, number, arrangement, and bonds but not the unshared pairs of the atoms in a molecule.
Vikki [24]
Electronic configuration
3 0
3 years ago
Acetylene gas (c2h2) reacts with oxygen gas (o2) to produce carbon dioxide (co2) and water vapor (h2o). how many liters of c2h2
MissTica
According to the balanced equation of the reaction:

2C2H2 + 5O2 → 4CO2 + 2H2O

So we can mention all as liters,

A) as we see that 2 liters of C2H2 react with 5 liters of oxygen to produce 4 liters of CO4 and 2 liters of H2O 

So, when we have 75L of CO2

and when we have 2 L of C2H2 reacts and gives 4 L of CO2

 2C2H2 → 4CO2 

∴ The volume of C2H2 required is:

                    = 75L / 2

                    = 37.5 L

B) and, when we have 75 L of CO2


and 4CO2 → 2H2O 

∴ the volume of H2O required is: 
                               
                            = 75 L /2
                            = 37.5 L 


C) and from the balanced equation and by  the same way:

when 5 liters O2  reacts to give 4 liters of CO2

and we have 75 L of CO2:

5 O2 → 4 CO2 

   ??  ←  75 L

∴ the volume of O2 required is:

                              = 75 *(5/4)

                              = 93.75 L



D) about the using of the number of moles the answer is: 

no, there is no need to find the number of moles as we called everything in the balanced equation by liters and use it as a liter unit to get the volume, without the need to get the number of moles.
6 0
3 years ago
Read 2 more answers
Todd drives west to work;54km on way in 1.5hours and then drives home in 2hrs. What is his velocity on the way to work? What is
Nataly [62]

Answer:

Explanation:

Velocity ​​is a physical quantity that expresses the relationship between the space traveled by an object, the time taken for it and its direction. In other words, velocity is associated with the change of position of a body over time.

Its unit in the International System of Units is the meter per second (\frac{m}{s}), but it can also be expressed in \frac{km}{hr}

So, in this case, the speed on the way to work will be:

velocity=\frac{54 km}{1.5 hours}

velocity= 36 \frac{km}{hr}

The velocity on the way back home will be:

velocity=\frac{54 km}{2 hours}

velocity= 27 \frac{km}{hr}

7 0
3 years ago
Read 2 more answers
Can you separate cooking oil from a mixture of cooking oil and water by filtering
slega [8]
Yes, they can be separated by using a funnel. In the separating funnel, they are kept for resting. After they are separated they are filtered one by one.
3 0
3 years ago
Which chemical equation best represents the law of conversation of matter?
dem82 [27]
H+O>h2o I believe this is the answer
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which indicator of a chemical change is shown?
    14·2 answers
  • In class, students were given the following problem: "Aluminum satellite dishes resist corrosion because aluminum reacts with ox
    8·1 answer
  • A proposed mechanism for the reaction of NO2 and CO is
    5·1 answer
  • What hazard classes are the following in?
    7·2 answers
  • Which matter particle has 34 protons and 36 electrons in the following configuration : 1s^ 2 2s^ 2 2p^ 6 3s^ 2 3p^ 6 4s^ 2 4p^ 5
    13·1 answer
  • You are given a solution containing a pair of enantiomers (A and B). Careful measurements show that the solution contains 98% A
    12·1 answer
  • A.Which non-metal is essential for our life and all living beings inhale it during breathing?
    9·2 answers
  • Which pair of elements form an ionic bond with
    11·2 answers
  • For a constant force, when the surface area is tripled the
    10·1 answer
  • Bonding with intermolecular forces:
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!