Answer : 3 substance will have 3 mole ratios to be written for a chemical reaction.
Explanation : The mole ratio can be defined as the ratio between the amounts in moles of any two or more compounds involved in a chemical reaction.
It can be determined by comparing the coefficients the formulas of a balanced chemical equation. It is also known as the molar ratio or mole-to-mole ratio.
Hence, when 3 substances are involved in a chemical reaction 3 mole ratios can be written for it.
I just took the test, the answer is A. 305,760 J, good luck.
I don't understand this
Answer: Galaxy D is what i got and it says ts is right
Explanation:
the red line on d is closer than the rest
Biotic environmental
Genetic
Pathogenic
In biology and ecology, abiotic componentsor abiotic factorsare non-living chemical and physical parts of the environment thataffect living organisms and the functioning of ecosystems. Abiotic factorsand phenomena associated with them underpin all biology. So the oilspill is a non-living chemical
Correct Answer:
A. Abiotic environmental
3 of 3 points
Answer:
summer solstice
Explanation:
on june solstice the northen hemisphere leans more toward the sun giving us longer days and more strong sunlight and It's the opposite in the Southern Hemisphere where june marks the start of winter thus its the shortest day of the year
(1) Group 1, Period 4 (3) Group 2, Period 3
(2) Group 2, Period 5 (4) Group 3, Period 4
Answer: Option (2) is the correct answer.
Explanation:
Ionization energy is defined as the energy required to remove the most loosely bound electron from a neutral gaseous atom.
And, when we move across a period then there is a decrease in the ionization energy due to decrease in the size of atoms.
Whereas when we move down a group then there is an increase in ionization energy because of increase in size of the atoms.
Since, it is given that each atom has 2 valence electrons therefore, all the atoms belong to group 2.
And, as it has lower first ionization energy than calcium it means the atom is larger in size than calcium atom.
Hence, we can conclude that this element located in Group 2, Period 5 on the periodic table.
The element with two valence electrons and a first ionization energy lower than calcium would be found in Group 2, Period 5 on the Periodic Table.
The element you're referring to, with two valence electrons and a lower first ionization energy than calcium, would be located in Group 2, Period 5 on the Periodic Table.
Here's why: Group 2 elements, or alkaline earth metals, all have two valence electrons. Periods on the other hand, describe the energy level of an atom's outermost electrons, with higher periods corresponding to higher energy levels. Thus, an atom in a higher period would have a lower ionization energy (the energy required to remove an electron) than one in a lower period.
Therefore, because the first ionization energy is lower than calcium (which is in Group 2, Period 4) but still has two valence electrons, this element would be located one period below, in Group 2, Period 5.
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