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3 years ago

What are the main ideas in dalton's atomic theory?

2 answers:

Ivan3 years ago

4 0

Main points/ideas in Dalton's Atomic Theory:

1. All matter is composed of extremely small particles called atoms.
2. Atoms of a given element are identical in size, mass, and other properties; Atoms of different elements are different in size,mass, and properties.
3. Atoms cannot be divided, created, or destroyed.
4. Atoms of different elements combine in simple whole number ratios to form chemical compounds.
5. In chemical reactions, atoms are combined, separated, and rearranged.

ELEN [110]3 years ago

3 0

The main points of Dalton's atomic theory were:
-Elements are made of extremely small particles called atoms.
-Atoms of a given element are identical in size, mass, and other properties.
-Atoms of different elements differ in size, mass, and other properties.
-Atoms cannot be subdivided, created, or destroyed.

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Translate the following formula or skeleton equations into word equations 2 NaCl(aq) + Ba(NO3)2(aq) → 2 NaNO3(aq) + BaCl2(aq) 2

Stolb23 [73]

Answer:

Explanation:

Consider the balanced equation shown and identify the statement that is not true.Na2SO4 (aq) + BaCl2 (aq) → 2 NaCl (aq) + BaSO4 (s)

2 NaCl (aq) could also be correctly written as Na2Cl2 (aq).

In a precipitation reaction the insoluble product can be identified by the symbol ________.

(s)

The scientific principle which is the basis for balancing chemical equations is

the Law of Conservation of Mass.

Which statement regarding balanced chemical equations is not true?

Coefficients are used in front of formulas to balance the equation.

The number of each kind of atoms must be the same on each side.

Reactants are written to the left of the arrow.

Subscripts may be changed to make an equation simpler to balance.

When no coefficient is written in front of a formula, the number "one" is assumed.

Subscripts may be changed to make an equation simpler to balance.

Which is the correct equation for the reaction of magnesium with hydrochloric acid to produce hydrogen and magnesium chloride?

Mg + 2 HCl → H2 + MgCl2

When the reaction shown is correctly balanced, the coefficients are:_____ KClO3 → _____ KCl + _____ O2

2; 2; 3

When the reaction shown is correctly balanced, the coefficients are:_____ C6H14 (l) + _____ O2 (g) → _____ CO2 (g) + _____ H2O (g)

2; 19; 12; 14

The balanced equation for the reaction occurring when calcium nitrate solution is mixed with sodium phosphate solution is

3 Ca(NO3)2 (aq) + 2 Na3PO4 (aq) → Ca3(PO4)2 (s) + 6 NaNO3 (aq).

The balanced equation for the reaction occurring when iron(III) oxide, a solid, is reduced with pure carbon to produce carbon dioxide and molten iron is

2 Fe2O3 + 3 C (s) → 4 Fe (l) + 3 CO2 (g).

Which of the following reactions would be classified as oxidation-reduction?

2Na(s)+Cl2(g)→2NaCl(s)2Na(s)+Cl2(g)→2NaCl(s)

Na(s)+CuCl(aq)→NaCl(aq)+Cu(s)

NaCN(aq)+CuCl(aq)→NaCl(aq)+CuCN(s)

2Na(s)+Cl2(g)→2NaCl(s)2Na(s)+Cl2(g)→2NaCl(s)

Na(s)+CuCl(aq)→NaCl(aq)+Cu(s)

When a solution of iron(III) nitrate is mixed with a solution of sodium hydroxide, a rust colored precipitate forms. This precipitate is probably

iron (III) hydroxide.

In the redox reaction shown, ________ is oxidized and becomes ________.Fe(s) + CuCl2 (aq) → Cu(s) + FeCl2 (aq)

+3.

4 0

3 years ago

The density of human blood is 1.06g/ml the volume is 5.5l what is the mass in kg

kondor19780726 [428]

The mass of the blood is 5.8 kg.

V = 5.5 L = 5500 mL

Mass = 5500 mL × (1.06 g/1 mL) = 5800 g = 5.8 kg

6 0

3 years ago

Please can someone answer quickly this do tomorrow morning

Romashka-Z-Leto [24]

<h2>Answer</h2>

Temperature change

<h3>Pls corret my answer if its wrong ●~●</h3><h3>#CarryOnLearning</h3>

3 0

3 years ago

using the equation 2h2+o2-->2h2o if 192g of oxygen are produced how many grmas of hydrogen must react with it

Brilliant_brown [7]

Equation: 2H₂ + O₂ → 2H₂O

Now, Given mass of Oxygen = 192 g
Molar mass of Oxygen = 16 g/mol

No. of moles in Oxygen = 16/192 = 0.0833

Now, for every mole of Oxygen, 2 mole of Hydrogen will form,
so, Number of moles of Hydrogen = 0.0833 * 2 = 0.167

Given mass = Number of Moles * Molar mass
Given mass = 0.167 * 2
m = 0.33 g

In short, Your Answer would be: 0.33 g

Hope this helps!

7 0

4 years ago

Read 2 more answers

Which of the following statements describe a system at equilibrium? There may be multiple correct answers. Select all that apply

ch4aika [34]

Answer:

The rate of the forward reaction and the rate of the reverse reaction are equal

The concentrations of the reactants and products no longer change.

Explanation:

The equilibrium state is a state of rest or motion of chemical system.

These are some of the condition for dynamic equilibrium of a system:

the systems must be involved in reversible chemical reactions.

the rate of forward reaction is equal to that of the reverse process.

the system offers no resistance to any change in any of the factors.

there is no change in concentration of each of the species in equilibrium with respect to time.

We can see that a system in equilibrium clearly identifies with the chosen options.

6 0

3 years ago