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Usimov [2.4K]
3 years ago
14

What is an atomic weight?

Chemistry
1 answer:
S_A_V [24]3 years ago
3 0
The average weight of an atom of an element, formerly based on the weight of one hydrogen atom taken as a unit or on 1/16 (0.0625) the weight of an oxygen atom, but after 1961 based on 1/12 the weight of the carbon-12 atom.
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How do you balance the equation in number one?
AleksAgata [21]
____NaNO3 + ___PbO --> ___Pb(NO3)2 + ___Na[2]O

To balace the eqaution, you need to have the same number of atoms for each element on both the reactant (left) and product (right) side. 

To start off, you wanna know the number of atoms in each element on both sides, so take it apart:

[reactants]        [product]
Na- 1               Na- 2

N- 1               N- 2(it's 2 because the the subscript [2] is outside of the parenthesis)

O- 4              O- 7 (same reason as above) 

Pb- 1            Pb- 1 

Na is not balanced out, so add a coefficient to make it the same on both sides.In this case, multiply by 2: 

2NaNO3

Now Na is balanced, but the N and O are also effected by this, so they also have to be multiplied by 2 and they become: 

Na- 2             Na- 2 

N- 2              N- 2 (it balanced out) 

O- 7 (coefficient times subscript, plus lone O)  O- 7 (balanced out) 

Pb was already balanced so no need to mess with it, just put a 1 where needed (it doesn't change anything). 

Now to put it back together, it will look like this: 

2NaNO3 + 1PbO --> 1Pb(NO3)2 + 1Na[2]O
3 0
3 years ago
The balanced chemical equation for the complete combustion propane, C3H8 is: C3H8 + 5O2 → 3CO2 + 4 H2O How many moles of H2O wou
BartSMP [9]
4/5 × 0.200 moles= 0.160moles
8 0
3 years ago
When the equal molar amounts of of both the acid and the base were reacts, what happened in the reaction?
Advocard [28]
It is going to be reaction of neutralization, and water and salt will be formed. If acid and base are strong, the reaction of the solution should become neutral.
3 0
3 years ago
Your general impression suggests that your immediate action should be to: ____.
Lynna [10]

Your general impression suggests that your immediate action should be to call for additional help. The correct option is a.

<h3>What is immediate action?</h3>

Immediate actions are the actions that are taken without taking any time. These actions are taken when there is no time to think, and you should immediately think about the actions. The emergency condition needs immediate help.

During the time of general impression, one should immediately call for additional help. Additional people will give you suggestions for the problem.

Thus, the correct option is a. call for additional help.

To learn more about immediate action, refer to the link:

brainly.com/question/28084658

#SPJ4

6 0
1 year ago
I need help with this question please help me
bulgar [2K]

8xc take away 8xExplanation:

8 0
3 years ago
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