In which scenario is a chemical change occurring?

Chemistry

2 answers:

fenix001 [56]3 years ago

4 0

the answer is A because had this question before

Dimas [21]3 years ago

4 0

Answer is C because each of the above cause a change in state, hence it’s physical, the molecules remain same.
But corrosion is a chemical change, cause there is an addition of water and air to the regular iron molecules

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The highest occupied s and p sublevels are partially filled

natta225 [31]

Answer:

Representative Elements

Explanation:

Representative elements are chemical elements of the long groups of the periodic table identified by the letter A, headed by the elements hydrogen, beryllium, boron, carbon, nitrogen, oxygen, fluorine and helium, as they appear in the periodic table of the elements. .

They are characterized by presenting "external" electronic configurations in their fundamental state ranging from ns1 to ns2np6, unlike the transition elements and internal transition elements.

The representative elements are the elements of groups 1 and 2 (block s), and of groups 13 to 18 (block p) .2 Until a few years ago, these groups were identified with Roman numerals from I to VII with the letter A.3 The elements of group 12 are generally considered as transition metals, however, zinc (Zn), cadmium (Cd), and mercury (Hg) share some properties of both groups, and some scientists believe they should be included as representative elements or elements of the main groups.

Representative elements (with some of the lighter transition metals) are the most abundant elements on earth, in the solar system, and in the universe.

The representative elements are divided into eight groups and are characterized in that their electronic distribution ends in s-p or p-s. The group number results from adding the electrons in the sub-levels s or s and p of the last level.

6 0

3 years ago

If a compound containing only magnesium and oxygen consists of 0.564 g mg and 0.376 g o, what is the compound's empirical formul

jasenka [17]

the Empirical formula of the compound is calculated as follows

find the moles of each element
moles = mass/molar mass

that is Magnesium= 0.564 g /24 g/mol = 0.0235 moles

For oxygen = 0.376 g /16 g/mol= 0.0235 moles
find the mole ratio by dividing both moles of by 0.0235 moles

magnesium = 0.0235/0.0235= 1mole
oxygen= 0.0235 /0.0235= 1mole

therefore the empirical formula = MgO

3 0

3 years ago

Which characteristic is true of sexual reproduction but not of asexual reproduction?

Viktor [21]

Answer:

Sexual Reproduction involves two different parties

Explanation:

Asexual is the opposite, so it uses no one else to reproduce

4 0

3 years ago

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If 588 grams of FeS2 is allowed to react with 352 grams of O2 according to the following equation, how many grams of Fe2O3 are p