Help please! :)Why are prefixes not needed in naming ionic compounds?
A. lon charges are written as superscripts with the names of the
atoms.
B. Roman numerals are used instead of prefixes to indicate number.
C. Subscripts are used in the name to indicate number of atoms.
D. Ions combine in only one ratio.

Answers

Answer 1

Answer:

Prefixes are not used to indicate the number of atoms when writing the chemical formula. The number of atoms are written as subscripts to their chemical symbols.

What is chemical formula?

Chemical formula of a compound is used to identify a compound and distinguishes it from other compounds. A chemical formula is written from the chemical symbols of elements which constitute the compound.

The number of atoms of each element is written as the subscripts of the symbols for each atoms. For example,magnesium chloride contains one magnesium and two chlorine atoms thus, its formula is MgCl₂.

The subscripts for each atom in the formula of an ionic compound is the charge of the other atom into which it is bonded. Similarly, the formula of iron oxide containing 2 Fe and 3 O is written as Fe₂O₃.

To find more on chemical formula, refer here:

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Answer 2

Answer:

Answer:

Ions combine into only one ratio

Explanation:

Just took test

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I need help fast. i will give you 85 points

Answers

Answer:

H3AsO4 → As2O5 + H2O

Explanation:

The first equation is balanced:

H3AsO4 → As2O5 + H2O

Here's a breakdown of the balanced equation:

Reactants:

H3AsO4: 3 hydrogen atoms, 1 arsenic atom, and 4 oxygen atoms

Products:

As2O5: 2 arsenic atoms and 5 oxygen atoms

H2O: 2 hydrogen atoms and 1 oxygen atom

As you can see, the number of atoms of each element is the same on both sides of the equation. This means that the equation is balanced.

How many moles of magnesium oxide are there in 2.50* 10^25 formula units of MgO?

Answers

just divide 2.50*10^25 by 6.02×10^23 to get to moles

Increasing temperature increases the number of collisions and the potential energy of the colliding molecules anddecreases the reaction rate.
True or False PLZ HELP!!

Answers

Increasing temperature does increase the amount of collision but it increases the kinetic energy of the molecules not the potential energy. Potential energy brings molecules together or apart (depending) and kinetic energy makes the molecules move around or not. Hope this helps

At stp what element is a good conductor of electricity?

Answers

copper is a good conductor

Give the number of valence electrons for each of the following: Ba, Al, P, Se, Br, K

Answers

Ba: 2
Al: 3
P: 5
Se: 6
Br: 7
K: 1

Hope this helps!

the trend for ionization energy is a general increase from left to right across a period. However phosphorus is found to have higher first ionization energy value than sulfur. Explain this exception to the general trend in terms of electron arrangements and attraction/repulsion

Answers

Since phosphorus is in the 5th group it has the ability to gain or lose electrons

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