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Olegator [25]
4 years ago
5

An element's atomic mass does not include the mass of its Electrons Protons Neutrons

Chemistry
1 answer:
klio [65]4 years ago
4 0
  Mass  of  electrons  are not  included when  calculating  the  atomic  mass  of   element.  Atomic  mass  of  the   element  is  equal  to   proton  +  neurons.  Example  the    the  mass  number  of  Nitrogen can   be  calculated as      7 protons  +  7  neutrons  to  give 14 .  thus  nitrogen  has  a  mass  number  of  14
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What is occurring when reactants are mixed and heated and liquid collects in the sidearm of the apparatus
olga55 [171]

When reactants are mixed and heated and liquid collects in the sidearm of the apparatus, a chemical reaction is occurring.

<h3>What is a chemical reaction?</h3>

A chemical reaction is said to occur when reactants are combined to form products. We must note that the formation of products is evidenced by;

  • Appearance of a liquid
  • Appearance of a gas
  • Appearance of a solid

Hence,  when reactants are mixed and heated and liquid collects in the sidearm of the apparatus, a chemical reaction is occurring.

Learn more about chemical reaction:brainly.com/question/22817140

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4 0
2 years ago
draw the lewis structure for pcl6, then answer the following questions: 1. how many valence electrons does this compound have? 2
DedPeter [7]

The Pcl6 has 48 bonded electrons and 18 lone pairs.

The Lewis structure of Pcl6 is as follows: -

Phosphorous is bonded with 6 chlorine atoms with 18 lone pairs.

Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule. [1][2][3] A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds.

    In Lewis structure, atoms are bonded with single bonds. If total number of electrons are 't' and number of bonds are 'n', then t-2n number of electrons are to be placed. Once the central atom is placed, they need to complete the octet rule.

Learn more about Lewis-dot structure from,

brainly.com/question/18083461

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5 0
1 year ago
Which information does the atomic mass of an element provide? The number of protons and neutrons in an atom B. the number of iso
Semmy [17]

The atomic mass of an element provides A. the number of protons and neutrons in an atom.

7 0
3 years ago
The combustion of carbohydrates and the combustion of fats are both exothermic processes, yet the combustion of carbohydrates is
saveliy_v [14]

Explanation:

Combustion of a compound is the reaction with oxygen , hence , the process of combustion is an oxidation reaction.

The carbohydrates contain more amount of oxygen as compared to the fats ,

Hence ,

carbohydrates , have a lot of oxygen contents , are are already partially oxidized , but fats have lower oxygen content .

Therefore ,

The partially oxidized carbohydrates are very difficult to oxidized in comparison to fats .

4 0
4 years ago
The density of mercury is 13.5 g/mL and the density of water is 1.00 g/mL. If a mercury barometer reads 805 mmHg, what is the ba
Marina86 [1]

Answer:

Barometric pressure will be 1086.75 cm H_{2}O

Explanation:

We know, P=h\rho g

where P is barometric pressure, h is height of liquid inside barometer, \rho is density of liquid and g is gravitational constant

If barometric pressure is x cm H_{2}O for 805 mm Hg then-

x\times (1.00g/mL)\times g=(805\times 10^{-1}cm Hg)\times (13.5g/mL)\times g

So, x=1086.75 cm H_{2}O

Hence barometric pressure will be 1086.75 cm H_{2}O

8 0
3 years ago
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