Answer:
Melting = endothermic, solid = exothermic
Explanation:
Ok so when ice cream melts, that requires heat, so it’s Endothermic. In order to melt it, it requires heat, heat is entering. When it becomes solid again, that is exothermic because it is losing heat in order to become cool again.
This problem involves the rate law of a chemical reaction relates the concentrations or pressures of the reactants with the rate of reaction together with some constant parameters. In this problem, we turn this into a mathematical problem by first assigning variables to the reactants.
Let:
x = concentration of ethyl acetate, [CH<span>3COOC2H5]
</span>y = concentration of sodium hydroxide, [NaOH]
The rate law is then equal to rate = xy since the reaction is first order in both reactants. It was then said that <span>the concentration of ethyl acetate was increased by half and the concentration of NaOH was quadrupled. In mathematical form, this translates to the following expression:
</span>
rate = 0.5x*4y = 2xy
Thus, the reaction rate increased by a factor of 2.
Water and carbon dioxide are compounds. Air is a mixture. The element that is listed is hydrogen.
Remember that you can also find elements on a periodic table.
Your answer is hydrogen.
Controls senses and most body functions .
Carries message and information between the brain & body
Explanation:
The nervous system helps to control senses, body functions, carries message and information between brain and the body. It consists of the brain, spinal cord and the nerves.
- Using series of electrical nerve impulses, the nervous system controls the body administration.
- The brain, spinal cord and nerves directs communications between different parts of the body system.
- It is divided into two broad categories, the central nervous system which consists of the brain and spinal cord and the peripheral nervous system which is made up the nerves.
Learn more:
neuron brainly.com/question/4662759
nervous system brainly.com/question/8701152
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