Which method is appropriate for separating a mixture of iron and aluminum? A. using a magnet B. distillation C. evaporation D. observing different densitie
Answers
If we used the third method it would change liquid into a gas which is strange according to the task.
And observing (even for a long time) won't help separating.
Related Questions
What is the name for a substance formed in a chemical reaction?A_reactantB_catalystC_enzymeD_product
Chemistry is best defined as the study of what
If the current in a wire is directed upward, what is the direction of the magnetic field produced by the current?
What particle is needed to complete the following equation 14 7 n + 14 6 c +1 1 h
14/7N + ____ ---> 14/6C + 1/1H
Answers
Explanation:
The given reaction equation is as follows.
+ ___
As there is release of one hydrogen which shows that mass number has increase by 1 on the product side.
Therefore, particle must be added in order to balance the given reaction equation.
Hence, the complete reaction equation will be as follows.
Final answer:
To complete the nuclear reaction equation, the particle required is a neutron (1/0n). It's calculated based on the law of conservation of mass and atomic numbers in nuclear reactions.
Explanation:
To complete the nuclear reaction equation 14/7N + ____ ---> 14/6C + 1/1H, we need to conserve both the mass number (the sum of protons and neutrons) and atomic number (number of protons). On the left side of the equation, we have nitrogen (represented by 14/7N), with a mass number of 14 and atomic number of 7. On the right side, Carbon (14/6C) has atomic number 6 and a mass number of 14 and Hydrogen (1/1H) has atomic number 1 and a mass number of 1. So, to balance the equation we need an element with atomic number (7-6-1) = 0 and mass number (14-14-1) = -1. This element is a neutron (represented as 1/0n), as it has a mass number of 1 and atomic number of 0.
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Final answer:
An appropriate hypothesis explaining the observation of distant galaxies moving away from each other, and that they do so more rapidly the further they are can be found in the Big Bang Theory. This theory suggests our universe began with a 'big bang' causing galaxies to move away from each other, a process which continues today.
Explanation:
Based on the observations mentioned, an appropriate hypothesis might involve the Big Bang Theory. This theory in physics and astronomy assumes that our universe started from a singularity - a very high-density and high-temperature state. The Big Bang Theory suggests that after the initial explosion, the galaxies began moving away from each other, a process which continues till today.
The farther a galaxy is from us, the faster it's receding, which is known as Hubble's Law. This observed phenomenon matches with the theory's premise, providing validating evidence for the Big Bang.
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Hardness is indicative of the strength of chemical bonds between elements.
Hardness is determined through a complicated process that requires expensive instruments.
Friedrich Mohs developed the standard hardness scale.
Diamond can scratch quartz.
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Hardness is a physical property
Friedrich Mohs developed the standard hardness scale.
Diamond can scratch quartz.
Answer:The properties of the Hardness are:
- Hardness is a physical property
- Hardness is indicative of the strength of chemical bonds between elements.
- Diamond can scratch quartzExplanation:
Hardness is defined as resistance offered by a material when subjected to any kind of mechanical effort.It is a physical property
Hardness of a materiel indicates its strength that strength of its chemical bond between the atoms and their arrangement in space.
Mohs scale is a scale which measures the hardness of the materiel from 1 to 10. Materiel with higher Mohs scale number will able to scratch materiel with lower Mohs scale score.
The properties of the Hardness are:
Hardness is a physical property
Hardness is indicative of the strength of chemical bonds between elements.
Diamond can scratch quartz.
2.)CH4+2O2-> CO2+2H2O
3.)N2+3H2-> 2NH3
4.)N2+O2-> 2NO
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Answer:
N2+O2-> 2NO
Explanation:
An endothermic reaction refers to a reaction in which heat taken in. This implies that heat is usually absorbed by the reaction system. The enthalpy of reaction for an endothermic reaction is always positive.
The triple bond between two Nitrogen atoms in N2 gas is very strong due to its small size and the triple bond thus the nitrogen molecule has a high dissociation energy. This accounts for the large amount of energy required to break the triple bond between nitrogen atoms in the nitrogen molecule. This causes the oxidation of Nitrogen molecule to NO to be largely endothermic.
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and also remember gas - liquid - soild gas change to liquid by hot air and liuid change to soild by clod air
hoped i helped
Answers
Answer:
1. B Decantation. 2. D 3. B
Explanation:
This method is often used when dealing with mixtures of liquids or immiscible liquids with different densities
2. This is because the denser substance sinks to the bottom due to its higher density, while the less dense substance remains on the surface. It allows for the separation of the two substances based on their density.
3. The mixture is left undisturbed after the less dense substance has been poured off. This allows the denser substance to settle at the bottom while the lighter substance remains on top
4. It's a handy method for separating substances based on their density For example, if you have a mixture of oil and water, you can use decantation to separate the two. By letting the mixture sit undisturbed, the oil, being less dense, will float to the top, allowing you to carefully pour it off and separate it from the water.