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Alexandra [31]
4 years ago
11

What was the normal perception of a scientist up until the seventeenth century?

Chemistry
1 answer:
castortr0y [4]4 years ago
7 0
working in a factory to develop new technology wearing a white lab coat working in a laboratory working in the woods to study nature collaborating with groups of peers to discuss ideas
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A chemical ____ is a process in which some substances change chemically into different substances
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When only one color of light reflects from a piece of paper, what happens to the other colors of light? Remember that light is e
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The other colors of the electromagnetic spectrum are absorbed by the substance and not reflected. If you were to look at it in infared or unltraviolet it would reflect different colors than those of the visible spectrum.

Explanation:

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State whether the following statement is true.justify the answer with examples
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False

Explanation:

Atoms only achieve complete outer electron shells if they contain an outer shell with 7 electrons before gaining another electron or an outer shell with 1 electron before losing an electron. This is assuming that the octet-rule can be applied to said atom. In addition, the number of valence electrons varies from atom to atom which is why not ALL atoms achieve complete outer electron shells after gaining or losing just ONE electron.

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4 years ago
The isotope carbon-14 has 6 protons and an atomic mass of 14. Carbon-14 has:
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3 years ago
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When hydrogen gas reacts with oxygen gas under certain conditions to produce liquid water, 572.0 kJ of heat energy is released.
frozen [14]

Answer : This reaction is an exothermic reaction.

Explanation :

Endothermic reaction : It is defined as the chemical reaction in which the energy is absorbed from the surrounding.

In the endothermic reaction, the energy of reactant are less than the energy of product.

Exothermic reaction : It is defined as the chemical reaction in which the energy is released into the surrounding.

In the exothermic reaction, the energy of reactant are more than the energy of product.

Enthalpy of reaction : It is the difference between the energy of product and the reactant. It is represented as \Delta H.

The balanced chemical reaction will be:

H_2(g)+O_2(g)\rightarrow H_2O(l)+572.0kJ

From the reaction we conclude that the heat energy is released during the reaction that means this reaction is an exothermic reaction.

Hence, the reaction is an exothermic reaction.

7 0
4 years ago
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