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
Aneli [31]
2 years ago
11

Jan was told by her mother to clean a kettle which had a heavy deposit of limescale. Her friends suggested the following product

s that could be used to achieve this: Zippo, Wham Bam, Scale Away and Blorox. Jan found that Scale Away successfully removed the limescale deposit while the others did not. Propose a hypothesis to explain the above observation?​
Chemistry
1 answer:
Drupady [299]2 years ago
3 0

Answer:

what happened when they removed the limescale?

Explanation:

You might be interested in
Rank these compounds by highest boiling point to lowest boiling point? Pentane, neopentane, isopentane
PilotLPTM [1.2K]
<span>Pentane has a boiling point of 36.1 C, while isopentane boils at 27.7C. Neopentane has the lowest boiling point at 9.5 C. Therefore from highest to lowest boiling points, it is pentane, isopentane, and neopentane.</span>
4 0
3 years ago
What indicators of a chemical reaction occurred in the following equation?
ch4aika [34]

Answer:

1) evolution of gas

2) evolution of heat

Explanation:

In this reaction, glucose is broken down into its constituents; carbon dioxide and water. The question is to decipher indicators of a chemical reaction from the equation.

If we look at the equation carefully, we will notice that a gas was evolved (CO2). The evolution of a gas indicates that a chemical reaction must have taken place. Secondly, energy is given off as heat. This is another indication that a chemical reaction has taken place.

6 0
2 years ago
Balance CH4+O2-&gt;CO2+H2O
malfutka [58]

Explanation:

I hope this helps Chemistry is so hard and I hate it

5 0
3 years ago
Which statement best describes the main benefit to organisms that reproduce sexually?
8090 [49]

Answer:

B. They will conserve energy during reproduction

Explanation:

5 0
2 years ago
Read 2 more answers
Which choice gives the correct oxidation numbers for all three elements in rb2so3 in the order that the elements are shown in th
vlabodo [156]
<h3>Answer:</h3>

             Rb  =  + 1

              S    =  + 4

              O   =  - 2

<h3>Explanation:</h3>

                   Oxidation states of the elements were calculated keeping in mind the basic rules of assigning oxidation states which included assignment of +1 charge to first group elements i.e. Rubidium (Rb) and assignment of -2 charge to Oxygen atom. Then the oxidation state of Sulfur was calculated as follow,

Rb₂ + S + O₃  =  0

Above zero (0) means that the overall molecule is neutral.

Putting values of Rb and O,

                                           (+1)₂ + S + (-2)₃  =  0

                                           (+2) + S + (-6)  =  0

                                           +2 + S - 6  = 0

                                           S - 6  =  -2

                                          S  =  -2 + 6

                                           S  =  + 4

7 0
3 years ago
Other questions:
  • Atomic symbol that has 29 protons
    8·1 answer
  • I NEED HELP ASAP!!! THIS IS A 30 POINT QUESTION!!!
    11·2 answers
  • How could you ensure that all the spectroscopes used the same calibration line and equation? What would you need to be sure was
    12·1 answer
  • Molar mass of c(no3)2
    8·1 answer
  • The volume of solution in a test tube is measured to be 0.0067 liter. Which digits in the measurement are significant figures?
    9·2 answers
  • Which of the following is an example of a chemical change?
    5·1 answer
  • How have chemists changed our daily lives the most
    9·1 answer
  • The reaction of 2-chloropropane with sodium hydroxide can occur via both SN1 and SN2 mechanisms.
    5·1 answer
  • Calculate the mass of 1.98 moles of Li2SO3
    7·1 answer
  • 7. What is the molar mass of each of the following elements?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!