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Scientists use the following four questions to determine if a substance is a mineral: Is it naturally occurring? Is it inorganic? Does it have a crystalline structure? Does it have a definite chemical composition? If the substance meets these criteria, it can be classified as a mineral.

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How do you use litmus paper to decide a substance is an acid or a base?

Dip the litmus paper into the solution in question. If the paper turns red, the substance is acidic. If the paper turns blue, the substance is basic. If there is no color change, then the substance is neutral.


How do you know whether a homogeneous material is a pure substance?

You decide whether a substance in homogenous or heterogenous by it's appearance. If it looks like it has just one part, it is homogenous. If it looks like it has 2 of more parts, it is heterogenous. An example of a homogenous substance is mouthwash. It looks like it is one substance, a blue liquid.


What is a chemical formula of a substance?

A chemical formula is a representation of the elements present in a substance and the ratio of their atoms. For example, the chemical formula for water is H2O, showing that each molecule of water contains two hydrogen atoms and one oxygen atom.


Describe the trend of the curve graph of temperature vs solubility decide whether the solution process is endothermic or exothermic?

Le Chatelier's principle of equilibrium can be applied here. In short, it states that if you stress a system at equilibrium, such as that when a substance is partially dissolved, the equilibrium system will shift to the right (increasing solubility) or to the left (decreasing solubility) to relieve the stress. You can treat heat as a substance in these kinds of problems, as in the following:heat + reactants products (endothermic)reactants products + heat (exothermic)In this case the dissolution equilibrium looks like this:heat + solid substance dissolved substance (endothermic)solid substance dissolved substance + heat (exothermic)If you add heat (raise temperature) to an endothermic process, it will shift to the right, causing more substance to dissolve in order to remove the stress of added heat. In other words, the solubility curve will show higher solubility at higher temperature.If you add heat (raise temperature) to an exothermic process, it will shift to the left, causing more substance to precipitate in order to remove the stress of added heat. In other words, the solubility curve will show lower solubility at higher temperature.


How did Mendeleyev finally decide to arrange his cards?

Dmitri Mendeleev decided to arrange his cards by organizing elements with similar properties into groups and leaving gaps for undiscovered elements. He then ordered the groups by increasing atomic weight, which led him to identify patterns and create the periodic table of elements.

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Judges decide questions of law. Juries decide issues of fact.


What is one thing scientists might look at to decide an animal's staus?

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What is the distinction between questions of law and questions of fact in legal proceedings?

In legal proceedings, questions of law involve interpreting and applying the law, while questions of fact involve determining what actually happened in a case. Judges decide questions of law, while juries or judges decide questions of fact.


Who decides which scientists get paid?

The foundation or company that the scientists work for often decide. There are grants that they can work under to fund their own research.


What evidence do scientists have and what more do they need to decide DDT is safe?

It ISN'T safe.


Why are you on wikiepeadia?

i like answering the questions, because it helps me decide my own problems out, why are you asking dumb questions? haha


How do scientists decide whether or not to reject or accept a hypothesis?

if the hypothesis is proven to be correct or incorrect


Do scientist believe in superstitious beliefs?

Most scientists do not believe in superstitious beliefs. This is because they are not proven by facts. However scientists decide what they believe and don't believe.