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
bonufazy [111]
3 years ago
14

How many controls or controlled variables can there be in an experiment

Chemistry
1 answer:
notsponge [240]3 years ago
3 0

i would say 35 i think

You might be interested in
Give the name (not formula) of the hydrocarbon
nordsb [41]

hydrocarbon is ethene which is used to test for saturation and it undergoes addition reaction

5 0
3 years ago
How many moles are there in 111.7 g of Fe?
Alenkinab [10]

Answer:

2

Explanation:

55.85 grams per mole.

times 2

111.7

6 0
2 years ago
Which gas below has the largest number of moles at STP?
ArbitrLikvidat [17]

Answer:

a.) 22.4 L Ne.

Explanation:

It is known that every 1.0 mol of any gas occupies 22.4 L.

For the options:

  • 22.4 L Ne:

<em>It represents </em><em>1.0 mol of Ne.</em>

<em />

  • 20 L Ar:

using cross multiplication:

1.0 mol occupies → 22.4 L.

??? mol occupies → 20 L.

The no. of moles of (20 L) Ar = (1.0 mol)(20 L)/(22.4 L) = 0.8929 mol.

  • 2.24 L Xe:

using cross multiplication:

1.0 mol occupies → 22.4 L.

??? mol occupies → 2.24 L.

<em>The no. of moles of (2.24 L) Xe </em>= (1.0 mol)(2.24 L)/(22.4 L) = <em>0.1 mol.</em>

  • So, the gas that has the largest number of moles at STP is: a.) 22.4 L Ne.

6 0
3 years ago
Sodium chloride is produced from its elements
Kisachek [45]

Answer:

                     Mass of Sodium  =  574.75 g

                     Mass of Chlorine  =  886.25 g

Explanation:

                   The  balance chemical equation for the synthesis of NaCl is,

                                        2 Na + Cl₂ → 2 NaCl

Step 1: <u>Find out moles of each reactant required,</u>

According to balance chemical equation,

                 2 moles of NaCl is produced by  =  2 moles of Na

So,

         25 moles of NaCl will be produced by  =  X moles of Na

Solving for X,

                     X  =  25 mol × 2 mol /  2 mol

                     X  =  25 moles of Na

Similarly for Cl₂,

According to balance chemical equation,

                 2 moles of NaCl is produced by  =  1 mole of Cl₂

So,

         25 moles of NaCl will be produced by  =  X moles of Cl₂

Solving for X,

                     X  =  25 mol × 1 mol /  2 mol

                     X  =  12.5 moles of Cl₂

Step 2: <u>Convert each moles to mass as;</u>

Mass  =  Moles × Atomic Mass

For Na,

Mass  =  25 mol × 22.99 g/mol

Mass  =  574.75 g

For Cl₂,

Mass  =  12.5 mol × 70.90 g/mol

Mass  =  886.25 g

6 0
3 years ago
The best method to improve air quality is to
Serga [27]
Stop littering and polluting
8 0
3 years ago
Read 2 more answers
Other questions:
  • When a gas is Perfect, or Ideal, what properties can be related in an equation?
    5·1 answer
  • Which is a chemical property of hydrogen?
    14·2 answers
  • What are the differences between boiling and evaporation
    7·1 answer
  • What do the group 1 elements form when they react with oxygen?
    15·1 answer
  • Which statement(s) is/are true? Energy
    10·1 answer
  • Mixture of acid and base
    11·1 answer
  • What happens when light waves pass between two materials of different densities?
    8·2 answers
  • What is the reaction of Dimethylamamine + acetic acid
    5·1 answer
  • Unit 7 CER
    10·1 answer
  • Hey chemist tests new measures for paint samples and decides to one mixture stickiness makes it worthless. A scientist working i
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!