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qwelly [4]
4 years ago
12

Describe several main ideas in chemistry

Chemistry
1 answer:
12345 [234]4 years ago
7 0
Matter.

A force of attraction that holds atom together 
<span>When atoms react they form a chemical bond which is defined as a force of attraction that holds atom together. A force of attraction is defined as a kind of force that draws two or more objects together regardless of distance. There are two major categories of forces of attraction, one is intramolecular and intermolecular. Intramolecular forces is the presence of forces in atoms internally. While intermolecular is the force by which the force that is existent in two or more elements. </span>
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6. If the broken wire of the top branch
vagabundo [1.1K]

Answer: When two light bulbs are connected in parallel, which is true? A. The total resistance is less than the resistance of either bulb alone. B. The Voltage provided

Explanation:

3 0
2 years ago
What volume of 0.194 MNa3PO4 solution is necessary to completely react with 85.5 mL of 0.109 MCuCl2 ?
ira [324]

Answer:

35.9 ml

Explanation:

Start with the balanced equation:

3CuCl2(aq)+2Na3PO4(aq)→Cu3(PO4)2(s)+6NaCl(aq)

This tells us that 3 moles of CuCI2 react with 2 moles Na3PO4-

∴  1 mole CuCl2 will react with 2/3 moles Na3PO4

We know that concentration = moles/volume i.e:

c= n/v

∴n=c×v

∴nCuCl2=0.107×91.01000=9.737×10−3

I divided by 1000 to convert ml to L

∴nNa3PO4=9.737×10−3×23=6.491×10−3

v=nc=6.491×10−30.181=35.86×10−3L

∴v=35.86ml

4 0
2 years ago
How many molecules (not moles of nh3 are produced from 5.01×10?4 g of h2?
Irina-Kira [14]
2,02g     -------    6,02×10²³
5,01×10⁴g  ---    x

x=\frac{5,01*10^{4}g*6,02*10^{23}}{2,02g}=14,93*10^{27}

N₂         +        3H₂       ⇒           2NH₃
1mol      :        3mol        :           2mol
                       18,06×10²³  :       12,04×10²³
                       14,93×10²⁷  :        y

y=\frac{14,93*10^{27}*12,04*10^{23}}{18,06*10^{23}}\approx9,95*10^{27}
5 0
3 years ago
How many grams of drug powder would you need to weigh to prepare 32ml of a suspension that should have a strength of 20mg/ml?
butalik [34]
15 grams for the drug powder
8 0
3 years ago
Read 2 more answers
What is the percent of hydrogen by mass in HNO3? (Molar<br> mass of HNO3 = 630 g/mol)
xxMikexx [17]

Answer:

63.01284 g/mol

Explanation:

This compound is also known as Nitric Acid.

Convert grams HNO3 to moles or moles HNO3 to grams

Molecular weight calculation:

1.00794 + 14.0067 + 15.9994*3

Percent composition by element

Element Symbol Atomic Mass # of Atoms Mass Percent

Hydrogen H 1.00794 1 1.600%

Nitrogen N 14.0067 1 22.228%

Oxygen O 15.9994 3 76.172%

6 0
3 years ago
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