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kumpel [21]
3 years ago
11

Read the article looking at leavse and answer the question. Why causes leaves to change color in the autum? Is the change physic

al or chemical?
Chemistry
1 answer:
guajiro [1.7K]3 years ago
8 0
It’s physical property

Explaination: hehehehehe
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What is 6.24x10^-4 in regular numbers
igor_vitrenko [27]

Answer:

0.000624

Explanation:

Since your exponent has a negative sign, the number will get smaller.  The decimal point will move to the left as 4 places.

0.624

0.0624

0.00624

0.000624

8 0
3 years ago
Which of the following correctly identifies a bryophyte
Free_Kalibri [48]

Answer:

1) bryophyte are also called amphibians of plants kingdom

2) presence of jacketed sex organ

3) they are thalloid

4) vascular tissue are absent

5) sexual reproduction is Oogamous

7 0
3 years ago
In a neutralization reaction ____
Olenka [21]

Answer:

neutralization reaction

Explanation: Because  Neutralization Reactions. ... from a neutralization reaction

8 0
3 years ago
What is the difference between ionic and covalent compounds?
k0ka [10]
<h3><u>Answer;</u></h3>

D. All the above

  • Covalent compounds are always poor conductors of electricity while ionic compounds conduct electricity well when melted or dissolved.
  • Covalent compounds can be solid, liquid or gas, but ionic compounds are solids.
  • In covalent compounds the elements present are usually close together on the periodic table whereas in ionic compounds they are usually well separated.
<h3><u>Explanation;</u></h3>
  • <u>Ionic compounds are compounds that are formed from strong electrostatic interactions between ions.</u> Ionic bonding occurs between a nonmetal, which acts as an electron acceptor, and a metal, which acts as an electron donor. The atoms involved in ionic bonding lose or gain electrons and form positively or negatively charged ions.
  • <em><u>Ionic compound are good conductors of electricity both in molten and aqueous form,. while covalent compound are poor conductors of electricity.</u></em>
  • <u>Covalent compounds on the other hand are compounds that have bonds where electrons are shared between atoms.</u> These types bonds mostly occur between nonmetals or between two atoms of the same element.
8 0
4 years ago
Write the empirical formula for at least four ionic compounds that could be formed from the following ions:
love history [14]

Answer:

FeSO_{4},FeCH_{3}CO,Fe_{2}(SO_{4})_{3},Fe_{2}(CH_{3}CO)_{3}

Explanation:

Empirical formula of ionic compound formed by two ions A^{x+} and B^{y-} is A_{y}B_{x} (for x\neq y) of AB (for x = y)

The above empirical formula is in accordance with charge neutrality principle

Here each cation (Fe^{3+} and Fe^{2+}) can form two ionic compounds by combining with two given anions (SO_{4}^{2-} and CH_{3}CO^{2-}).

So the four ionic compounds are: FeSO_{4},FeCH_{3}CO,Fe_{2}(SO_{4})_{3},Fe_{2}(CH_{3}CO)_{3}

4 0
4 years ago
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