All categories

3 years ago

Determine the molecular

Chemistry

1 answer:

jeyben [28]3 years ago

7 0

Answer:

MgO- magnesium oxide

Cu(NO3)2- copper(11)nitrate

Li2CO3- lithium carbonate

You might be interested in

What properties you can observe or measure?

Advocard [28]

We can observe physical properties of elements and compounds without changing the substance.

Examples of physical properties: Density, color, boiling point, state of matter, appearance: dull or shiny, etc.

But we can also observe and measure chemical properties by reacting a substance with something else. For example, like mixing baking soda and vinegar together. The vinegar reacts with the baking soda and produces carbon dioxide: a new substance.

Some examples of chemical properties: Flammability, amount of heat that is released during combustion, toxicity (how much damage it causes to other organisms), radioactivity, and ability to oxidize (when you have metal that becomes rusty looking).

4 0

4 years ago

An atom of 105In has a mass of 104.914558 amu. Calculate the binding energy in MeV per NUCLEON. Enter your answer with 3 signifi

joja [24]

Answer:

8.46

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

Also, atomic number of I = 549

Thus, the number of protons = 49

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

105 = 49 + Number of neutrons

Number of neutrons = 56

Mass of neutron = 1.008665 amu

Mass of proton = 1.007825 amu

Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron

Thus,

Calculated mass = (49*1.007825 + 56*1.008665) amu = 105.868665 amu

Mass defect = Δm = |105.868665 - 104.914558| amu = 0.954107 amu

The conversion of amu to MeV is shown below as:-

1 amu = 931.5 MeV

So, Energy = 0.954107*931.5 MeV/atom = 888.750671 MeV/atom

Also, 1 atom has 105 nucleons (Protons+neutrons)

So, Energy = 888.750671 MeV/105nucleons = 8.46 MeV/nucleon

Answer:- 8.46

8 0

3 years ago

How many elements are identified in tearms of their atoms

lianna [129]

their identified by the number of protons they have in the nucleus which = their electrons.

6 0

4 years ago

CAN SOMEONE HELP ME HERE PLEASE I ONLY NEED THESE LEFT AND IM CONFUSED-

liubo4ka [24]

Answer:

Pick UpTruck

Explanation:

Because the pick uptruck is bigger and on the oppiste side of the rode

7 0

3 years ago

How many moles of gas are contained in 890.0 mL at 21.0 at C degrees and 750.0 mm Hg pressure?

Rom4ik [11]

Answer:

There are 0.0364⋅mol

Explanation:

7 0

3 years ago