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3 years ago

Which statement best describes an oxidation-reduction reaction.

1 answer:

Taya2010 [7]3 years ago

8 0

1. The correct statement that describes a Redox reaction is ( D ) ; A chemical reaction in which electrons are transferred between reactants.

2. The chemical formula that shows the correct subscripts is ( D ) BeF₂

3. The type of reaction that is shown is ; ( C ) decomposition reaction

A Redox reaction ( oxidation-reduction reaction ) involves the exchange/transfer electrons between reactants and the change in the oxidation number of the molecules involved in the reaction changes when an electron is either gained or lost.

Given that the Be has four ( 4 ) electrons and Fluorine has nine ( 9 ) electrons when they combine Fluorine will be left with an excess of electrons therefore the correct chemical formula will be BeF₂

The breaking up of an element into its smaller parts in a chemical reaction is known as a decomposition reaction.

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2 years ago

suppose you push a hockey puck of mass m across frictionless ice for a time 1.0 s, starting from rest, giving the puck speed v a

saul85 [17]

Answer: Twice the previous time would be taken to reach the same speed v with the puck of mass 2m.

Explanation:

Let a Force pushes the hockey puck of mass m.

Then acceleration, a= \frac{F}{m}a=mF

From the equation of motion,

\begin{gathered}\➪ v=u+at\\ v=0+\frac{F}{m}\Delta t\end{gathered}⇒v=u+atv=0+mFΔt ......(1)

In the second case, when mass is 2m, then acceleration,

a'=\frac{F}{2m}a′=2mF

and t' is the time taken.

The final speed is v,

\begin{gathered}\➪ v=0+ a't'\\ \➪ \frac {F}{m}\Delta t=\frac{F}{2m}t'\\ \➪ t'= 2\Delta t\end{gathered}⇒v=0+a′t′⇒mFΔt=2mFt′⇒t′=2Δt using equation (1)

Hence, it would take two times the previous amount of time to push the pluck of double mass.

 I hope this is understandable and if my answer helped you please can you give me a brainliest its will really help me and thank you have a nice day!!

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3 years ago

Read 2 more answers

Drag the amounts to order them from greatest to least. 1 in. = 2. 54 cm 1 ft = 12 in.

Sergio [31]

Answer:

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Explanation:

1.8ft.

20in = 1.666ft

56cm = 56/2.54cm = 22.05in = 1.8375ft.

56cm -> 1.8ft -> 20in

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