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2 years ago

Give an example how we use science in our every day life

2 answers:

8 0

An example of how we use science in our everyday life is cooking and baking.
We combine certain ingredients and certain measurements to make delicious foods and drinks. And when we add heat, it makes bread rise, causing a chemical reaction because you cannot reverse a cake back into the individual ingredients.

Hope this helps! :3
(This is not a sample from anything. This is in my own words, so I’m not sure if it is right, but this is an example of how we use science.)

leonid [27]2 years ago

5 0

Answer: When you turn a light on it becomes bright :)

In electrical wiring, a light switch is a switch most commonly used to operate electric lights, permanently connected equipment, or electrical outlets. Portable lamps such as table lamps may have a light switch mounted on the socket, base, or in-line with the cord. Manually operated on/off switches may be substituted by dimmer switches that allow controlling the brightness of lamps as well as turning them on or off, time-controlled switches, occupancy-sensing switches, and remotely controlled switches and dimmers. Light switches are also found in flashlights, vehicles, and other devices.

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Attached are two chemistry questions I need help with. thank you to whoever helps me out

ivann1987 [24]

13.6
a) yes Pb is more reactive that Ag, Pb before Ag
b) no, Cu after H
c) yes, Cl2 is more active than I2
4) yes, Mg is more active

13.7 (as I think)
Al ³⁺ more active than Zn²⁺, Mn can react with Zn²⁺, but not with Al ³⁺ , because Mn after Al but before Zn

4 0

2 years ago

Analyze the diagram showing the changing states of matter. Drag the item from the item bank to its corresponding match.

iVinArrow [24]

The correct matches for changes of state are:

1 or 3 : Arrow that shows particles getting closer together
gas: State of matter that would fill any container
liquid: State of matter with definite volume but NOT shape
2 or 4: Arrow that shows particles gaining energy
solid: State of matter with definite shape

<h3>What is change of state?</h3>

Change of state is the process whereby matter in one physical state is converted to matter in another state by the addition or removal of heat.

The process of change of state are:

Melting: solid to liquid due to addition of heat
Vaporization: liquid to gas due to addition of heat
Sublimation: solid to gas due to addition of heat
Freezing: liquid to solid due to removal of heat
Condensation: gas to liquid due to removal of heat
Deposition: gas to solid due to removal of heat

Considering the given diagram, the correct matches are:

1 or 3 : Arrow that shows particles getting closer together
gas: State of matter that would fill any container
liquid: State of matter with definite volume but NOT shape
2 or 4: Arrow that shows particles gaining energy
solid: State of matter with definite shape

In conclusion, change of state of matter occurs due to heat changes.

Learn more about change of state at: brainly.com/question/1078692

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6 0

1 year ago

Balance the following skeleton reactions and identify the oxidizing and reducing agents:(b) CrO₄²⁻(aq) + Cu(s) → CrOH₃(s) + CuOH

andrew-mc [135]

The balanced skeleton reactions are given below

2CrO₄²⁻(aq) + 3Cu(s) +8 $H_{2} O$ (l) → 2Cr(OH)₃(s) + 3Cu(OH)₂(s) + 6 $OH^{-}$ (aq)

The oxidising agent and reducing agents are Cr and Cu .

There are following steps involve in balance redox reaction in basic medium .

First divide the reaction into two half reactions which give oxidation and reduction half reaction.

Then balance the elements other than oxygen and hydrogen atom.

Balance the oxygen atom by adding $H_{2} O$ where number of oxygen is less .

Balance the hydrogen atom by adding $H^{+}$ on another side of where water molecule added.
Add $OH^{-}$ ions to both sides to neutralize $H^{+}$ ion.
Combine $H^{+}$ and $OH^{-}$ ion to make $H_{2} O$ .

Balance the charge by adding $e^{-}$ .

Add the half reaction .

The species which reduces the other species in the redox reaction is called oxidizing agent . Similarly , the species which oxidize the other species in the redox reaction is called reducing agent .

To learn more about reducing agents please click here ,

brainly.com/question/2890416

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4 0

1 year ago

Describe the crystallization process as applied in salt preparation

shtirl [24]

Explanation:

The principle used in the preparation of these salts is to dissolve

the cystine in an alcoholic alkali solution to which just sufficient

water to effect solution has been added, and, after filtering from

excess cystine, to precipitate the salt by addition of a suitable

indifferent solvent. While various solvents, such as acetone,

ether, or large amounts of alcohol caused precipitations, these were

either oily or amorphous. Only acetonitrile was found to possess

the power of initiating regular crystallization in the salt solutions.

While the solutions of the different salts require different amounts

of the solvent for complete precipitation, a partial substitution of

absolute ether for acetonitrile was found expedient in the case

of the most soluble of the salts, the K salt.

6 0

2 years ago

Read 2 more answers

5. A 25 ml graduated cylinder has a volume of water of 10 ml, when a glass marble is place in the

IceJOKER [234]

Answer:

The volume of the marble is 10 mL.

Explanation:

From the question given above, the following data were obtained:

Volume of water = 10 mL

Rise in water = 10 mL

Volume of marble =.?

From the question given above, the water level rise by 10 mL when a glass marble was placed into the water.

This is equally the volume of the marble as the marble will displace it's volume when placed in the water according to Archimedes' principle.

Therefore,

Rise in water = 10 mL = volume of marble.

4 0

2 years ago