B. For most of its life cycle, star A appeared substantially brighter than star B from earth
C. For most of its life cycle, star B appeared substantially brighter than star A from earth
Only five supernovae have ever been documented as being visible to the unaided eye, with two of those believed to be core-collapse supernovae. Thus, option B is correct.
Iron atoms are compressed so closely together that the nuclei's repelling forces cause the squeezed core to recoil, which causes the star to go supernova and generate a massive, superheated shock wave.
A supernova explosion takes place in a star over the course of just 100 seconds. A star that experiences a supernova explosion dies and leaves behind a neutron star or a black hole as a remnant.
The largest explosion that mankind have yet witnessed is a supernova. Each explosion is the incredibly bright, incredibly potent explosion of a star. The largest explosion that mankind have yet witnessed is a supernova.
Therefore, For most of its life cycle, star A appeared substantially brighter than star B from earth
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The Gibbs free energy change for this reaction at 298 K is approximately -54,484.8 J.
Calculating the Gibbs free energy change (ΔG) for a reaction at a given temperature using the Gibbs-Helmholtz equation,
ΔG = ΔH - TΔS
ΔG = (-144,600 J) - (298 K)(-301.2 J/K)
ΔG = -144,600 J + 90,115.2 J
ΔG = -54,484.8 J
ΔG = -54,484.8 J
Converting to kilojoules:
ΔG = -54,484.8 J / 1,000
= -54.48 kJ
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b. 0.571
c. 0.569
d. 0.537
e. 0.214
Answer:
The concentration of CaCl2 in this solution is 0.564 molar (option A)
Explanation:
Step 1: Data given
Mass of CaCl2 = 23.7 grams
Mass of water = 375 grams
Density of solution is 1.05 g/mL
Step 2: Calculate total mass
Total mass = mass of CaCl2 + mass of water
Total mass = 23.7 grams + 375 grams = 398.7 grams
Step 3: Calculate volume of the solution
Density = mass / volume
Volume = mass / density
Volume = 398.7 grams / 1.05 g/mL
Volume = 379.7 mL = 0.3797 L
Step 4: Calculate moles CaCl2
Moles CaCl2 = mass CaCl2 / molar mass CaCl2
Moles CaCl2 = 23.7 grams / 110.98 g/mol
Moles CaCl2 = 0.214 moles
Step 5: Calculate concentration
Concentration of CaCl2 = moles / volume
Concentration of CaCl2 = 0.214 moles / 0.3797 L
Concentration of CaCl2 = 0.564 mol / L = 0.564 molar
The concentration of CaCl2 in this solution is 0.564 molar (option A)
b. churches to draw in new patrons who want to view its beauty from inside.
c. reflecting and absorbing light, as well as displaying colorful images.
d. creating mirrored images of light and colors on the surrounding walls of a religious structure.
Stained glass can be useful for churches to draw in new patrons who want to view its beauty from inside.
Stained glass is defined as a glass material which is made colored by means of adding metallic salts during the manufacturing process which imparts color to the glass.
These are used in many decorative purposes like decorating windows . The colors are imparted to the glass by mixing metal oxides into the colorless glass in its melted state.Sometimes fusion of a colored glass with a plain glass to make a stained glass is also used.
Stained glass is also prepared by glass paint where in streaks are introduced in glass by means of light firing in a furnace or a kiln.Silver stain is a range of compounds where in silver compound are mixed with binding substances and then applied to surface of glass,which are then fired in a furnace or in a kiln.
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OB. nuclear fusion.
C. nuclear fission.
OD nuclear disintegration.
Answer:
Explanation:
Rusting of iron occurs during the reaction of iron and oxygen in the presence of moisture to form hydrous iron (III) oxide, which is a reddish brown substance.
By virtue of this, the atoms which are reactants in the redox reaction would e oxygen and iron.
I hope this was clear and easy to understand.
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an element
a compound