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SVETLANKA909090 [29]
3 years ago
9

Describe the experiments conducted by Thomson and Rutherford, and how the observations and evidence from each of these experimen

ts led to changes in the model of the atom.
Chemistry
1 answer:
nasty-shy [4]3 years ago
4 0
                                       Thomson
In  his  model discovered  electron  which  has  negative  charge whereby  this   electrons  were  positioned  throught  the  atom  surrounded  by  a  soup of  positive  balance   the  negative  charge  of  electron
                      Rutherford
  In  his  model  concluded  that  atom  is  made  up  of  central  charge surrounded   by  orbiting  electrons.
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What kind of bond holds together atoms within a molecule?
sesenic [268]
I think it would be these three answers ionic , covalent , and polar covalent
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3 years ago
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Propane, the gas used in barbeque grills, is made of carbon and hydrogen. Will the atoms that make up propane form covalent bond
Masteriza [31]
Hydrocarbons are molecules that contain only carbon and hydrogen. Due to carbon's unique bonding patterns, hydrocarbons can have single, double, or triple bonds between the carbon atoms. The names of hydrocarbons with single bonds end in "-ane," those with double bonds end in "-ene," and those with triple bonds end in "-yne". The bonding of hydrocarbons allows them to form rings or chains.


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3 years ago
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How many grams of NaCl are needed to prepare 50.0 grams of 35.0% of salt solution?
nevsk [136]

Answer:

17.5 g

Explanation:

Given data

  • Mass of solution to be prepared: 50.0 grams
  • Concentration of the salt solution: 35.0%

The concentration by mass of NaCl in the solution is 35.0%, that is, there are 35.0 grams of sodium chloride per 100 grams of solution. We will use this ratio to find the mass of sodium chloride required to prepare 50.0 grams of a 35.0% salt solution.

50.0gSolution \times \frac{35.0gNaCl}{100gSolution} = 17.5gNaCl

4 0
3 years ago
A solution of acetic acid has a pH of 3.45. What is the concentration of acetic acid in this solution? Ka for CH3COOH is 1.8×10-
Serjik [45]

Answer:

0.007 M

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,  

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

pH=-log(\sqrt{k_a\times C})

Where, C is the concentration = ?

Given, pH = 3.45

So, for CH_3COOH, K_a=1.8\times 10^{-5}

3.45=-log(\sqrt{1.8\times 10^{-5}\times C})

\log _{10}\left(\sqrt{1.8\cdot \:10^{-5}C}\right)=-3.45

C = 0.007 M

5 0
3 years ago
What is the definition of a homogeneous mixture?
sammy [17]

Answer:

A homogenous mixture is a mixture that is uniform in composition. This means that you cannot apart the individual elements that make up the mixture.

Explanation:

5 0
2 years ago
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