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How can you determine the melting point of a substance based in its heating curve?
Wiki User
∙ 11y ago
Heating curves (temp vs time) show the transition of a solid to a liquid to a gas. The solid begins to absorb heat, which is represented by a gradual increase in your curve starting from the origin. Eventually, the solid will reach the melting point, at which the temperature will cease to increase until it has fully transitioned to a liquid phase. Therefore, the melting point is the y-value correspondind to the first horizontal portion of the heating curve.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoYes because you can use the cooling curve to find the freezing point so the melting and freezing points occurs at the same temperature
Wiki User
∙ 11y agoThe graph becomes flat, constant temperature, at the melting point and boiling points of a pure substance.
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How is the melting point of a substance related to its freezing point?
The melting point of a substance is when a substance turns from a solid to a liquid, and the freezing point is when a substance turns froma liquid to a sold. This of water, t he freezing point, when it turns to a solid (ice) is 0 degrees C. Hope that helps!
Substance X is a molecular compound and is not an acid Based just on this information what can you determine about substance X?
X is not an electrolyte, since you know that it isn't an acid. molecular compounds can be both soluble and insoluble.
The separation of petroleum into components based on their boiling points is accomplished by?
the answer is fractional distillation because there are many different substances in the crude oil. each of them has different melting points, boiling points, freezing points and so on (different physical properties). therefore, if you heat them up, each of them may evaporate at a different temperature. you can then collect the oil substance if you can control the temperature at a certain range. cracking and melting are used for solid substance, not liquid based polymerization is a chemical reaction, which will not help you separate the matters.
What substance is the Fahrenheit scale based on?
Water
Separation of substance based upon particle size?
It's called sifting.
How can physical properties be used to identify substance?
Every substance has certain properties that show things about them, such as odor, taste, malleability, hardness, color, state at room temperature, and melting/boiling point. If you know the color of a substance, it is far easier to determine what that substance is, and if you know the color and the boiling point, your choices are limited even further. Using the physical properties of a substance, you can identify the substance based off of its unique properties or combinations of properties.
Describe the principle of the Ames test for identifying chemical carcinogens?
A test used to determine the mutagenic potential of a substance based on the mutation rate of bacteria that are exposed to the substance.
How is the melting point of a substance related to its freezing point?
The melting point of a substance is when a substance turns from a solid to a liquid, and the freezing point is when a substance turns froma liquid to a sold. This of water, t he freezing point, when it turns to a solid (ice) is 0 degrees C. Hope that helps!
Substance X is a molecular compound and is not an acid Based just on this information what can you determine about substance X?
X is not an electrolyte, since you know that it isn't an acid. molecular compounds can be both soluble and insoluble.
Why is melting point of ammonia lower than water?
The melting point of a substance is based upon the polarity of the bonds that make up the substance. In water, the O-H bond has a difference in electronegativity of 1.4 (Pauling's Scale) and in ammonia, the N-H bond has a difference in electronegativity of .9. Therefore, it takes more energy to break apart the O-H bond because the polarity is so great, and this is why it has a higher melting point than ammonia.
How do you determine if a substance is more dense or less dence?
Density is measured and expressed as the mass to volume ratio. To determine what the density of a substance you measure its mass and divide that number by its measured volume (or you can look up the density based on what composes it). Then, using the same units, do the same for another substance. The substance with the larger number is more dense, has more mass per volume, than the substance with the lower number, and the same in reverse with respect to less density.
Determine how much of each of the following NaCl solutions in grams contains 1.5g of NaCl 0.058 percent NaCl by mass?
In order to determine this, it is necessary to know what solution we are looking at. One we know that we can look at the grams in a mole of the substance and determine the percentages based on molecular weight.
What is ratioactive dating called?
Radiocarbon Dating. It measures the levels of carbon 12, a radioactive substance in everything, and based on how much is left scientists can determine how old something is.
The separation of petroleum into components based on their boiling points is accomplished by?
the answer is fractional distillation because there are many different substances in the crude oil. each of them has different melting points, boiling points, freezing points and so on (different physical properties). therefore, if you heat them up, each of them may evaporate at a different temperature. you can then collect the oil substance if you can control the temperature at a certain range. cracking and melting are used for solid substance, not liquid based polymerization is a chemical reaction, which will not help you separate the matters.
What is the Brown paper bag test?
In food science this test is used to determine if a substance is fat or not. It is a crude test but it works in a pinch. Rubbing the unknown substance on the brown paper bag if fat is present the bag will get translucent. If it is water based it just gets wet.
How many mgs are in 1.5ml?
It depends on the substance being measured. The milligrams (mg) in 1.5 milliliters (ml) will vary based on the density of the substance. To determine the exact number of mgs, you need to know the substance's specific gravity or concentration.
What substance is the Fahrenheit scale based on?
Water
