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Artemon [7]
3 years ago
7

30 points

Chemistry
2 answers:
vfiekz [6]3 years ago
8 0
The molecular weight for Calcium Chloride Dihydrate (CaCl2•2H20) is 2H2O.

mass of 64g/mol = 256.52 g/mol
mass of 11g/mol = 26.981538 g/mol
mass of 147g/mol= 146.9149 g/mol
258g/mol = 258.09843 g/mol
Tcecarenko [31]3 years ago
4 0

Answer:

M=147.014 g/mol

Explanation:

The atomic weights of the elements:

Ca=40.078 g/mol

Cl=35.453 g/mol

H=1.008 g/mol

O=15.999 g/mol

The calcium chloride dihydrate:

M=(40.078+35.453*2+2*2*1.008+2*15.999)g/mol

M=147.014 g/mol

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When excess potassium hydroxide and H2SeO3 react whats the net ionic reaction for the acid-base rxn
Bad White [126]

The required net ionic equation is; 2H^+(aq) + 2OH^-(aq)-----> 2H2O(l)

The molecular reaction equation is;

H2SeO3(aq) + 2KOH(aq) -----> K2SeO3(aq) + 2H2O(l)

The complete ionic equation is;

2H^+(aq) + SeO3^2-(aq) + 2K^+(aq) + 2OH^-(aq)-----> 2K^+(aq) + SeO3^2-(aq) + 2H2O(l)

Net ionic equation;

2H^+(aq) + 2OH^-(aq)-----> 2H2O(l)

We can clearly see that this is a neutralization reaction hence water is the product of the net ionic equation.

Learn more:brainly.com/question/25150590

4 0
2 years ago
The dissociation of a/an ________ releases hydrogen ions and increases the concentration of hydrogen ions in a solution.
Crank
Acid...hope it helps
5 0
3 years ago
Sodium has an atomic number of 11 and an atomic mass of 23. sodium has __________.
seraphim [82]

Sodium has 11 protons, therefore number of neutrons must be 23 – 11 = 12 neutrons.

Sodium has 12 neutrons.

<h3>What are neutrons?</h3>

The neutron is a subatomic particle with the symbol n that is slightly heavier than a proton and has a neutral charge (i.e., neither a positive nor a negative charge). Atoms' nuclei are made up of protons and neutrons. Protons and neutrons are both referred to as nucleons because of how similarly they function inside the nucleus and because they both have masses that are about equal to one atomic mass unit. Nuclear physics describes their characteristics and interactions.

The arrangement of electrons around an atom's hefty nucleus largely determines its chemical characteristics. The amount of protons, or atomic number, determines the charge of the nucleus, which determines the electron configuration.  

To learn more about neutrons from the given link:

brainly.com/question/5013687

#SPJ4

5 0
1 year ago
What kind of energy is required for photosynthesis to occur?
MrMuchimi
A. Solar Energy

Hope this helps!
STSN
5 0
3 years ago
How do you find percentage yeild​
ch4aika [34]

Answer:

To calculate the percentage of a specific number, you first convert the percentage number to a decimal. This process is the reverse of what you did earlier. You divide your percentage by 100. So, 40% would be 40 divided by 100.

Explanation:

4 0
3 years ago
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