A pea plant had purple flowers. What alleles for flower color could the sex cells carry?
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As the vibration of molecules increases, the _____ of the substance increases. temperature internal energy kinetic energy all of the above
Conpare and constrast chemical and physical change give an example of each
What would you expect to happen if you raised the temperature of the water to 85°C? Check all that apply.
Lee conducts an experiment to see if mass is conserved when a piece of charcoal is burned for 5.0 minutes. He measures the mass of the charcoal before lighting it with a match. At the end of 5.0 minutes, Lee puts out the fire by suffocating it. After the charcoal has cooled, he measures its mass again. His data are below.Initial Mass | Final Mass.415 | .289Charlene tries to repeat Lee's experiment by using a different piece of charcoal. But she burns the charcoal for just 3.0 minutes and collects all of the gas and dust released by the burning charcoal. She then weighs the total mass of these objects. Her results are below.Initial Mass | Final Mass.498 | .498Charlene's experimental results indicate that mass was conserved. Why do Lee's results indicate that mass was not conserved?He burned the charcoal for a longer period of time than Charlene did.He did not collect the gas and dust released by the burning charcoal.He forgot to measure the mass of the charcoal while it was still burning.Mass is not conserved when an object undergoes a chemical change.
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Explanation:
Homogeneous mixture is separated using two stage separation process: mobile stage and stationary stage. The mobile phase are absorbent such as water, chemicals while the stationary stage is the column used for the separation process. The integral method of separation of homogeneous mixtures is called chromatography (analytical or preparative). Other method of separation of homogeneous mixtures is called distillation and it is based on the various boiling points of the component of mixture.
While heterogeneous mixtures are separated based the properties of the components. One method of separation of solids suspended in liquids is simple filtration.
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Answer:
Explanation:
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
Rules for significant figures:
Digits from 1 to 9 are always significant and have infinite number of significant figures.
All non-zero numbers are always significant.
All zero’s between integers are always significant.
All zero’s preceding the first integers are never significant.
All zero’s after the decimal point are always significant.
The rule apply for the multiplication and division is :
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
Thus for product of
In this problem, 3.2 has 2 significant figures and 5.00 has 3 significant digits thus product will have the least number of significant figures which is 2. So, the answer will be in 2 significant figures.
Therefore, the answer is
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Answer: Option (a) is the correct answer.
Explanation:
In order to maintain a neutral charge the number of protons must be equal to the number of electrons.
For example, in a neutral carbon atom the atomic number or number of protons is 6. Also, number of electrons present in carbon atom will be 6.
Thus, we can conclude that out of the given options for elements to maintain a neutral charge number of electrons and protons must be equal.
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