The change is mainly chronological ... in the beginning there was only hydrogen and helium, then as stars aged and exploded, heavier elements were introduced into the interstellar medium, and were thus incorporated into newer stars.
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
The chemical composition of mineral turpentine can vary, but it is primarily composed of various hydrocarbons such as alpha-pinene, beta-pinene, and carene. The exact chemical equation for mineral turpentine would depend on its specific composition, but these hydrocarbons are the main components.
KF reagent typically refers to Karl Fischer reagent, which is used for moisture determination. It usually consists of an iodine compound, a sulfur dioxide-based titrant, a base (such as pyridine), and a solvent (often methanol or ethanol). The specific chemical composition may vary depending on the manufacturer and type of Karl Fischer reagent.
The chemical composition of a fart can vary depending on the individual and diet, but it typically includes gases such as nitrogen, carbon dioxide, hydrogen, methane, and hydrogen sulfide.
The color of a mineral sample is determined by its chemical composition
No. Stars vary in lots of aspects, including:* Diameter * Mass * Color (and the related surface temperature) * Chemical composition * Density (related to mass and diameter) * Brightness
The composition is determined by spectral analysis.
Stars contain hydrogen, helium and a little iron.
The chemical composition of the star atmosphere.
A fixed composition is not a characteristic of a mixture. The composition of a mixture can vary, unlike the composition of a compound that forms a chemical reaction.
The chemical composition of the star.
An astrochemist is an expert in astrochemistry, the study of the chemical composition of stars and outer space.
No. It varies but most are same.
The method used to discover the chemical composition of stars, called spectroscopy, is not as effective for the Moon and planets because they do not emit light like stars do. Instead, they reflect light from the Sun, which makes it more challenging to accurately determine their chemical composition through spectroscopy.
No. Stars vary in mass, color, size, temperature, and composition of trace elements.
A spectrograph breaks down the light from stars into its component colors or wavelengths. Each chemical element absorbs and emits light at specific wavelengths, creating a unique fingerprint called a spectral line. By analyzing the spectral lines in a star's light, scientists can determine its chemical composition.
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.