Answer:
Metals are the only substances that use metallic bonds among their atoms.
Explanation:
While many elements are commonly known as metals, including iron, aluminum, gold, silver and nickel, metals include a variety of other elements as well.
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Answer:
Options (A), (B) and (C)
Explanation:
In an ecosystem, the transfer of nutrients takes place from one place o another. This input and output of nutrients continuously takes place in the ecosystem.
- The rainwater is also essential as it carries a certain amount of valuable nutrients such as calcium, fluoride, magnesium, and iron that are mixed with water, and this enriches the fertility of the soil and the water is taken up by the roots of the plants for the growth and expansion of plants.
- The nitrogen-fixing bacteria refers to those micro-organisms that are present in the soil and helps in the conversion of the atmospheric nitrogen into nitrogen compounds, which are helpful for the enhancement of the soil fertility.
- Chemical weathering usually refers to the process by which the rocks disintegrates due to the effect of chemical reactions. The micro-organisms and the plant roots release some acids sometimes that react with the rocks and help in breakdown releasing the nutrients that are stored in the rocks. This eventually mixes up with the soil and increases the quality of the soil.
Thus, the correct answers are options (A), (B) and (C).
Using the proper protective equipment from goggles to lab coat and gloves. Also includes ventilation fan to prevent toxic fumes and emergency eyewash station
Answer: Alcohol and water in the solution have different boiling points.
Explanation: The substance that has a lower boiling point evaporates faster. For this case alcohol has a lower boiling point than water so it evaporates in a faster rate. This process of distillation separates alcohol and water in a solution.
I would say a number about 545.