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disa [49]
3 years ago
5

What causes heat energy when you rub two objects against each other?

Chemistry
2 answers:
harkovskaia [24]3 years ago
3 0

Answer:

Friction is a force that opposes motion. ... When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.

avanturin [10]3 years ago
3 0

Answer: Friction

Explanation: a force between two moving objects rubbing together that slow the objects and produces heat.

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Is cotton opaque or not
qaws [65]
Cotton is opaque.  Opaque objects do not let light pass through.  You can't see through the objects that are opaque.
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3 years ago
30ml of 0.10 NaOh neutralized 25.0ml of HCL determine the concentration of the HCL? PLEASE HELP ME ASAP
Contact [7]
The equation is one to one so you can use M1V1=M2V2
so
(30ml)(.10M)=(25ml)(x)
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6 0
3 years ago
Find mass of 4.5 moles of co2​
Kobotan [32]

Answer:

198g

Explanation:

Molar Mass of CO2 = 12 + (2x16) = 12 + 32 = 44g/mol

Number of mole of CO2 = 4.5moles

Mass of CO2 =?

Mass = number of mole x molar Mass

Mass of CO2 = 4.5 x 44 = 198g

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3 years ago
Global climate change is
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3 years ago
Write the balanced equation for a reaction between aqueous nitric acid (HNO3) and solid lithium metal (this is a single replacem
Lemur [1.5K]

<u>Answer:</u> The equation is given below.

<u>Explanation:</u>

Single replacement reactions are the chemical reactions in which more reactive metal displaces a less reactive metal from its chemical reaction. General equation for these reactions is given by the equation:

A+BC\rightarrow AC+B

Metal A is more reactive than metal B.

The reactivity of metals is judged with the help of reactivity series. In this series, the metals lying above are more reactive than the metals which lie below in the series.

For the reaction of solid lithium metal and nitric acid, the equation follows:

3Li(s)+4HNO_3(aq.)\rightarrow 3LiNO_3(aq.)+2H_2O(l)+NO(g)

This is a type of single replacement reaction because Lithium (more reactive metal) is replacing Hydrogen (less reactive metal) from the chemical reaction.

3 0
3 years ago
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