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

Answers

Answer 1

Answer: Since you did not show anypicture, I will be describing Dalton’s atomic theory. The scientist thoughtthat the atom was the smallest particle in the universe is John Dalton. Heestablished five theories relating atoms. One, elements are made of extremelysmall particles called atoms. Two, atoms of different element have differentsizes, mass and physico – chemical properties. Three, atoms cannot be dividedfurther, destroyed or created. It also follows the law of conservation ofenergy. Fourth, atoms can combine to form compounds. And lastly, in chemicalreaction, atoms can be combined, separated or rearranged.

Answer 2

Answer:

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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I need help! In an equilibrium reaction with a Keq of 1 × 108 A. products are favored. B. the reaction is nonspontaneous. C. the reaction is endothermic. D. reactants are favored.

Answers

When K is > than 1 products are favored. When q is < less than 1 reactants are favored. 1 x 108 = 108 which is > 1 so products are favored.

Answer: The correct answer is Option A.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants. It is represented as $K_(eq)$

For the general reaction:

$A+B\rightarrow C+D$

Expression for equilibrium constant is given as:

$K_(eq)=([C][D])/([A][B])$

Conditions for $K_(eq)$ are:

$K_(eq)>1$ , then products are favored

$K_(eq)=1$ , then forward reaction is equal to backward reaction

$K_(eq)<1$ , then reactants are favored

As, $K_(eq)=1* 10^8$ and is very much greater than 1, so products will be favored.

Hence, the correct answer is Option A.

Which of the following is an exothermic reaction?A.) dissolving sugar in water

B.) melting ice

C.) condensing steam

D.) dissolving ammonium nitrate in water

Answers

Answer:

C.) condensing steam

Explanation:

Exothermic reactions are chemical reaction which energy is released to the environment in the form of heat . The overall energy of the reactant is greater than the energy of the product. The higher in energy of the reactant causes a release of heat to the environment. In exothermic reactions, enthalpy change is usually negative and is accompanied by the loss of energy in the form of heat or light.

Condensation is the change of water vapor to liquid . The conversion is an exothermic reaction as energy is release to the environment in the form of heat. The water vapor molecules has higher energy than liquid. The changes of water vapor to liquid causes a loss in energy of the water vapor. As the water vapor loss more energy, heat is been release to the surrounding.

All other reaction are endothermic in which heat is absorb from the environment except for condensation of steam.

The event that is an example of an exothermic reaction is condensing steam. The answer is letter C. An exothermic reaction is one in which there is a release of heat during the reaction. Dissolving sugar in water, melting ice and dissolving ammonium nitrate in water are all examples of an endothermic reaction.

The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 3.50 g of butane?

Answers

First convert grams to molesusing molar mass of butane that is 58.1 g

3.50g C4H10 x (1 molC4H10)/(58.1g C4H10) = 0.06024 mol C4H10

Now convert moles to molecules by using Avogadro’s number

0.06024 mol C4H10 x (6.022x10^23 molecules C4H10)/(1 molC4H10) = 3.627x10^22 molecules C4H10

And there are 4 carbon atoms in 1 molecule of butane, so usethe following ratio:

3.627 x 10^22 molecules C4H10 x (4 atoms C)/(1 moleculeC4H10)
= 1.45 x 10^23 atoms of carbon are present

$\boxed{{\text{1}}{\text{.45}} * {\text{1}}{{\text{0}}^{{\text{23}}}}{\text{ atoms}}}$ of carbon is present in 3.50 g of butane.

Further Explanation:

Mole is a measure of the amount of substance. It is defined as the mass of a substance that has the same number of fundamental units as there are atoms in 12 g of carbon-12. Such fundamental units can be atoms, molecules or formula units.

Avogadro’s number is the number of units that are present in one mole of the substance. Its value is equal to ${\text{6}}{\text{.022}}*{\text{1}}{{\text{0}}^{{\text{23}}}}\;{\text{units}}$ per mole of substance. These units can be electrons, atoms, molecules or ions.

The formula to calculate the moles of butane is as follows:

${\text{Moles of butane}}=\frac{{{\text{Given mass of butane}}}}{{{\text{Molar mass of butane}}}}$ ......(1)

The given mass of butane is 3.50 g.

The molar mass of butane is 58.12 g/mol.

Substitute these values in equation (1).

$\begin{aligned}{\text{Moles of butane}}&=\left({{\text{3}}{\text{.50 g}}} \right)\left( {\frac{{{\text{1 mol}}}}{{{\text{58}}{\text{.12 g}}}}}\right)\n&={\text{0}}{\text{.060220234 mol}}\n&\approx {\text{0}}{\text{.0602 mol}}\n\end{aligned}$

The molecules of butane are calculated as follows:

${\text{Molecules of butane}}=\left({{\text{Moles of butane}}}\right)\left( {{\text{Avogadro's Number}}}\right)$ ......(2)

The moles of butane is 0.060220234 mol.

The value of Avogadro’s number is ${\text{6}}{\text{.022}}*{\text{1}}{{\text{0}}^{{\text{23}}}}\;{\text{molecules}}$ .

Substitute these values in equation (2).

$\begin{aligned}{\text{Molecules of butane}}{\mathbf&{ = }}\left({0.060220234{\text{ mol}}} \right)\left( {\frac{{{\text{6}}{\text{.022}} *{\text{1}}{{\text{0}}^{{\text{23}}}}{\text{ molecules}}}}{{{\text{1 mol}}}}}\right)\n&={\text{3}}{\text{.62646}}*{\text{1}}{{\text{0}}^{{\text{22}}}}{\text{ molecules}}\n&\approx {\text{3}}{\text{.626}}*{\text{1}}{{\text{0}}^{{\text{22}}}}{\text{molecules}}\n\end{aligned}$

One molecule of butane has four carbon atoms. So the number of carbon atoms in ${\text{3}}{\text{.62646}}* {\text{1}}{{\text{0}}^{{\text{22}}}}{\text{ molecules}}$ of butane is calculated as follows:

${\text{Atoms of carbon}}=\left( {{\text{Molecules of butane}}}\right)\left( {\frac{{{\text{4 carbon atoms}}}}{{{\text{1 butane molecule}}}}}\right)$

.......(3)

Substitute ${\text{3}}{\text{.62646}}*{\text{1}}{{\text{0}}^{{\text{22}}}}{\text{ molecules}}$ for the molecules of butane in equation (3).

$\begin{aligned}{\text{Atoms of carbon}}&=\left( {{\text{3}}{\text{.62646}}* {\text{1}}{{\text{0}}^{{\text{22}}}}{\text{ molecules}}}\right)\left({\frac{{{\text{4 carbonatoms}}}}{{{\text{1 molecule}}}}} \right)\n&= 1.45 * {\text{1}}{{\text{0}}^{{\text{23}}}}{\text{ atoms}}\n\end{aligned}$

Therefore the number of atoms of carbon is ${\mathbf{1}}{\mathbf{.45 * 1}}{{\mathbf{0}}^{{\mathbf{23}}}}{\mathbf{ atoms}}$ .

Learn more:

1. Calculate the moles of chlorine in 8 moles of carbon tetrachloride: brainly.com/question/3064603

2. Calculate the moles of ions in the solution: brainly.com/question/5950133

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Mole concept

Keywords: mole, atoms of carbon, molecules of butane, carbon-12, 12 g, Avogadro’s number, butane, moles of butane, electrons, molecules, atoms.

This is easy, just read the last question. (Already Asked this question before)How many grams of Sodium Hydroxide could be produced if 1.2L of 3.0 M Calcium Hydroxide are consumed?

Na2CO3 + Ca(OH)2 --> 2NaOH + CaCO3

Now I know how to do equations like this, just a bit confused on how to use my conversion factors.

Do I need to use the 3.0 Molarity in this equation or can I just use Molar Volume of a gas (22.4L/1 mole)?

Answers

You would have to use the molarity of calcium hydroxide to find the moles of calcium hydroxide. Once you have moles, just convert using mole:mole ratio and find the grams of sodium hydroxide.

i feel twitchy and not able to focus without my good friend (dylan) around, help? i dont like him like that, plus im already with someone, uhhh i cant explain this; helpp

Answers

Well maybe you do like him like that. Sometimes when your used to something and it changes bodies are not ready for change, talk to him about this

Which of the following has the greatest mass? Star, Moon, Planet or Galaxy?YOU GET MANY POINTS)

Answers

Answer:

galaxy

Explanation:

because it contains the whole universe

Yep galaxy is the one

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