Draw the structure of the following atoms (1) 19/9 F (2)28/14 SI

I really do not know how to do this, I already asked my teacher to explain it to me, but I still don’t understand. Can someone p

Gala2k [10]

1. to calculate molar mass , you need average atomic mass of each element.

formula is simple

suppose we have Na2CO3

here it says

there are

2 atoms of Na

1 atom of C

3 atom of O

now

molar mass = (total atoms of Na × average atomic mass of Na) + ( total atom of C × average atomic mass of C )+ (total atom of O × average atomic mass of O)

i hope you can figure out it now.

in case of (NH4)2

this means you have 2 count of NH4

so total atoms of N = 2

total atoms of H = 4×2 = 8

so on you can now figure it out

2. balanced equation

here LHS and RHS shoild have same number of atoms of each element .

for example

H2 + Cl2 => 2HCl

here 2 atoms of H combined with 2 atoms of Cl , we know H and Cl combined and formed HCl now because total H atoms are 2 and Cl atoms are 2 in LHS then we should also have 2 atoms of each in right side

so thats why we have 2HCl in right side.

Try to figure out . let me know if need any help

3 0

3 years ago

I NEED ANSWERD ASAP !!!!

gavmur [86]

It depend on what kind of seed it is.

6 0

3 years ago

5

castortr0y [4]

Answer:

D . A substance with a pH of 8

Explanation:

pH stands for "Potential for Hydrogen." This is an indicator of a solution's acidity or alkalinity. It is also used to tell which chemicals are great for cleaning.

pH 7 and pH 8 are both considered "neutral pH," thus, solutions with these pH are often used as dishwashing detergents because they do not destroy the surfaces of objects. However, pH 8 is said to be more alkaline in nature. This allows it to destroy the residues, such as fats and oils, in pots and pans. It is the pH of baking soda.

7 0

3 years ago

In a chemical reaction , atoms are created/rearranged. The atom are joined together in the same/different arrangements after the

Paul [167]

Answer:

I think these are the answers:

Explanation:

created/rearranged

same/different

greater/less/same

4 0

3 years ago