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3 years ago

Which element is commonly found in meteorites

Chemistry

2 answers:

MA_775_DIABLO [31]3 years ago

3 0

The element that is commonly found in meteorites is oxygen

Lynna [10]3 years ago

3 0

The element commonly found is oxygen

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Of all the Sunny Club members in a particular city, 25% prefer swimming on weekends and 75% prefer swimming on weekdays. 10% of

professor190 [17]

10% of the 25% of people that prefer to swim on weekends are female.

Multiply 10% and 25% to get 0.025

 55% of the 75% are females who prefer to swim on the weekdays.
Multiply them together getting 0.4125

Divide 0.25 by 0.10= 0.40

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3 years ago

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What is Calcium sulfate+ iron give you and is sulfuric acid H2SO4

pickupchik [31]

A strong acid? calcium sulfate?

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3 years ago

The standard cell potential (E°cell) for the reaction below is +0.63 V. The cell potential for this reaction is __________V when

Elodia [21]

Answer: The cell potential of the above reaction is 0.52 V

Explanation:

The given chemical equation follows:

$Pb^{2+}(aq.)+Zn(s)\rightarrow Zn^{2+}(aq.)+Pb(s)$

Oxidation half reaction: $Zn(s)\rightarrow Zn^{2+}(aq.)+2e^-$

Reduction half reaction: $Pb^{2+}(aq.)+2e^-\rightarrow Pb(s)$

To calculate the EMF of the cell, we use the Nernst equation, which is:

$E_{cell}=E^o_{cell}-\frac{0.059}{n}\log \frac{[Zn^{2+}]}{[Pb^{2+}]}$

where,

$E_{cell}$ = electrode potential of the cell = ? V

$E^o_{cell}$ = standard electrode potential of the cell = 0.63 V

n = number of electrons exchanged = 2

$[Zn^{2+}]=1.0M$

$[Pb^{2+}]=2.0\times 10^{-4}M$

Putting values in above equation, we get:

$E_{cell}=0.63-\frac{0.059}{2}\times \log(\frac{1.0}{2.0\times 10^{-4}})\\\\E_{cell}=0.52V$

Hence, the cell potential of the above reaction is 0.52 V

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3 years ago

Which of the following is a unit of length? O A. A liter O B. A kilogram C. A meter O D. A degree

sergeinik [125]

Answer:

C.) A meter

Explanation:

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3 years ago

Observations: Sodium hydroxide reacts with coper sulfate

vaieri [72.5K]

Answer:

copper sulphate reacts with sodium hrydroxide to form a blue preipitate of copper hrydroxide and soduim hrydroxide.

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3 years ago