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jeka57 [31]
3 years ago
15

What type of reaction is depicted by this equation?

Chemistry
1 answer:
const2013 [10]3 years ago
5 0
It is a decomposition reactions
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Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is
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3 years ago
Ca(OH)2 - How many Carbon, how many oxygen, and how many hydrogen in this formula? - please explain
aksik [14]

Answer: 1Ca + 2O + 2H

Explanation:

Ca is 1 since there is no subscript

O and H each have 2 because the subscript 2 is outside the parenthesis so you multiply their subscript (1) by 2

3 0
2 years ago
A piper delivers 9.98 g of water at 19 degrees Celsius. What does the pipet deliver
leva [86]

Answer:

the volume = 9.99 ml

Explanation:

in your Q we need to calculate the volume does the pipet deliver so , we are going to use this formula:

the volume = mass / density

here we need to know the density of water at a certain temperature 19 degrees Celsius ,so I used an external source   to get the density of water at 19 degrees Celsius because it is changing with different temperatures

where mass here = 9.98 g

and  the density of water at  temperature 19 degrees Celsius=  0.998405mL

-1

by substitution :

the volume = 9.98 g / 0.998405mL

-1

                   ≅ 9.996 ml = 10 ml

5 0
3 years ago
Read 2 more answers
Pls answer and btw I use BJU
Andrew [12]

Answer:

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

Isotopic notation:       Protons            Neutrons          Electrons

        ¹⁹⁷₇₉Au                  79                      118                    79

Solution:

p+n = atomic mass = 79+118 = 197

e = 79  (atomic number)               so the element with atomic number Au.

Isotopic notation:       Protons            Neutrons          Electrons

        ⁷⁹₃₅Br                    35                        44                    35

Solution:

Number of neutrons = atomic mass - number of protons=  79-35 = 44

Number of protons and electrons are equal so number of electrons are 35.

Isotopic notation:       Protons            Neutrons          Electrons

        ¹²⁷₅₃I                          53                    74                      53

Solution:

The atomic number of iodine is 53.

Number of neutrons = atomic mass - number of protons= 127-53 = 74

Number of protons and electrons are equal so number of electrons are 53.

Isotopic notation:       Protons            Neutrons          Electrons

        ⁵⁶₂₆Fe                        26                       30                    26

Solution:

The atomic number of iron is 26.

atomic mass = n+p= 26+30= 56

Number of protons and electrons are equal so number of electrons are 26.

8 0
3 years ago
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