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1 year ago

The temperature of a star is 6000K and its luminosity is 1000. Which type of star is it?

Chemistry

1 answer:

Lorico [155]1 year ago

4 0

Answer:

Its probably none of those.

Explanation:

White dwarf temperatures can exceed 100,000 Kelvin according to NASA (that's about 179,500 degrees Fahrenheit). Despite these sweltering temperatures, white dwarfs have a low luminosity as they're so small in size according to NMSU.

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I need help on this may u help me?

sergij07 [2.7K]

Answer:

just go to googel and it will tell you

Explanation:

7 0

2 years ago

You need to decontaminate water cans previously used for nonpotable water. You calculate that five gallons of disinfecting solut

grandymaker [24]

Answer:

Five ampules

Explanation:

An ampule of calcium hypochlorite should be mixed with water to make a gallon of the solution for disinfectant.

7 0

2 years ago

Light travels at a rate of 3.00 x 10^8 m/s. It takes light 8.30 min to travel from the surface of the sun to the earth. What is

bija089 [108]

Answer: The distance of the earth from the sun is $1.494\times 10^{11}m$

Explanation:

Speed of light = $3.00\times 10 ^8 m/s$

Time taken to travel from sun to earth = 8.30 mins = $8.3\times 60=498sec$ (1min=60 s)

As we know ; Speed is defined as the distance travelled per unit time.

$Distance=speed\times time$

Hence distance between sun and earth = $3.00\times 10^8m/s\times 498s=1.494\times 10^{11}m$

Thus the distance of the earth from the sun is $1.494\times 10^{11}m$

7 0

2 years ago

A galvanic cell with E o cell = 0.30 V can be constructed using an iron electrode in a 1.0 M Fe(NO3)2 solution, and either a tin

Andreyy89

Answer: The half reactions are written below.

Explanation:

Oxidation reaction is defined as the reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

$X\rightarrow X^{n+}+ne^-$

Reduction reaction is defined as the reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

$X^{n+}+ne^-\rightarrow X$

We are given a chemical cell which is Fe-Sn cell. The half reaction follows:

Oxidation half reaction: $Fe\rightarrow Fe^{2+}+2e^-;E^o_{Fe^{2+}/Fe}=-0.44V$

Reduction half reaction: $Sn^{2+}+2e^-\rightarrow Sn;E^o_{Sn^{2+}/Sn}=-0.14V$

The substance having highest positive $E^o$ potential will always get reduced and will undergo reduction reaction. Here, zinc will always undergo reduction reaction will get reduced.

Total cell reaction: $Fe+Sn^{2+}\rightarrow Fe^{2+}+Sn$

Hence, the half reactions are written above.

3 0

2 years ago

Which five statements about hemoglobin and myoglobin structure are true? Each iron atom can form six coordination bonds. One of

Ulleksa [173]

Answer:

Here's what I get

Explanation:

Each iron atom can form six coordination bonds. One of these bonds is formed between iron and oxygen.

TRUE

By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom.

TRUE

Molecular oxygen binds irreversibly to Fe²⁺ in heme.

False. It binds reversibly with heme.

Heme is composed of an organic protoporphyrin component and a metal atom.

TRUE

Hemoglobin and myoglobin are heterotetramers.

False. Hemoglobin is a tetramer. Myoglobin a monomeric protein.

Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom.

TRUE

Each hemoglobin molecule can bind four oxygen molecules; each myoglobin can bind only one oxygen molecule.

TRUE

7 0

3 years ago

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