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Charra [1.4K]
3 years ago
14

4. What parts of Dalton’s atomic theory no longer agree with the current picture of the atom? Provide an answer using 3 – 4 sent

ences in your own words.
Chemistry
2 answers:
pogonyaev3 years ago
7 0
<span>Since you did not show any picture, I will be describing Dalton’s atomic theory. The scientist thought that the atom was the smallest particle in the universe is John Dalton. He established five theories relating atoms. One, elements are made of extremely small particles called atoms. Two, atoms of different element have different sizes, mass and physico – chemical properties. Three, atoms cannot be divided further, destroyed or created. It also follows the law of conservation of energy. Fourth, atoms can combine to form compounds. And lastly, in chemical reaction, atoms can be combined, separated or rearranged. </span>
Serjik [45]3 years ago
6 0

dalton said that the atom is the smallest particle but now we know that an atom can be divided into electron proton and neutron.

the guy below should be deleted but you cant cause its approved, he didnt even asnwer the question XD

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Given the reaction: 4A1 + 302 - 2A1,O, How many grams of Al will be
dlinn [17]

Answer:

The answer to your question is 27 g of Al

Explanation:

Data

mass of Al = ?

moles of Al₂O₃ = 0.5

The correct formula for the product is Al₂O₃

Balanced chemical reaction

               4Al + 3O₂   ⇒   2Al₂O₃

Process

1.- Calculate the molar mass of the product

Al₂O₃ = (27 x 2) + (16 x 3)

         = 54 + 48

         = 102 g

2.- Convert the moles of Al₂O₃ to grams

               102 g ---------------- 1 mol

                 x       ----------------  0.5 moles

                 x = (0.5 x 102) / 1

                 x = 51 g of Al₂O₃

3.- Use proportions to calculate the mass of Al

                4(27) g of Al --------------- 2(102) g of Al₂O₃

                     x               --------------- 51 g

                        x = (51 x 4(27)) / 2(102)

                        x = 5508 / 204

                        x = 27 g of Al

4 0
2 years ago
Draw the line-bond structure of oleic acid (cis-9-octadecenoic acid), CH3(CH2)7CH=CH(CH2)7COOH, at physiological pH. You do not
Elza [17]

Answer:

Explanation:

Oleic acid originates from an unsaturated fatty acid with 18 carbon atoms and one double bond, which can be found in olive oil and many other vegetable and animal oils and fats. Its economic importance includes the production of soap making and cosmetics etc.

The line-bond structure of the given oleic acid in the question can be found in the attached below.

7 0
3 years ago
Why are group 1a (1) and group 2a (2) elements found in many compounds, but not group 8a (18) elements?
Rashid [163]
Because group 1a and 2a are most reactive due to their least number of electrons in their outmost shell compared to group 8a(18)
4 0
2 years ago
Read 2 more answers
5) Some students believe that teachers are full of hot air. If I inhale 2.2 liters of gas at a temperature of 180 C and it heats
ahrayia [7]

Given :

If I inhale 2.2 liters of gas at a temperature of 180 C and it heats to a temperature of 380 C in my lungs.

To Find :

The new volume of the gas.

Solution :

Since, their is no information about pressure, so we will assume that pressure is constant.

We know, relation between temperature and volume in constant pressure is :

\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}

Putting all given values in above equation, we get :

V_2 = \dfrac{V_1\times T_2}{T_1}\\\\V_2 = \dfrac{2.2\times (180+273)}{(380+273)}\\\\V_2 = 1.53 \ liters

Hence, this is the required solution.

8 0
3 years ago
I need help on #6 please
kobusy [5.1K]
6. a) Team 3 (b/c their numbers were closer apart then the rest)
    b)No they were not (can happen you might be precises but not accurate) 
    c)Team four, (on trial 4)
5 0
2 years ago
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