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3 years ago

Which of the following is NOT a part of Dalton's atomic theory

Chemistry

2 answers:

natali 33 [55]3 years ago

8 0

Answer:

Here are the answer choices

Explanation:

A) Compounds contain atoms of at least two different elements.

B) Each element is made up of atoms.

C) Each element contains atoms with negatively charged particles.

D) Atoms within the same element have the same amount of mass.

KengaRu [80]3 years ago

6 0

Answer:

u didn't give us the multiple hoice answer

Explanation:

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Which factor most directly affects potential energy?

Georgia [21]

Answer:

Mass, gravitational force and height

Explanation:

Potential energy of body is the energy at rest in a body and it depends on the mass, acceleration due to gravity and height of a body;

Potential energy = mass x gravity x height = mgh

The more the mass, gravity and height of a body, the higher the potential energy a body will posses. This is why a stone at a height has more potential energy than one on the ground.

6 0

4 years ago

Equal volumes of two solutions, one containing a strong acid at pH 2 and the other containing a strong base at pH 12, are mixed.

mash [69]

Answer:

Explanation:

Assume we have 1 L of each solution.

Solution 1

$\text{[H$^{+}$]}= 10^\text{-pH} \text{ mol/L} = 10^{\text{-2}} \text{ mol/L}\\ \text{ moles of H}^{+} = \text{ 1 L solution} \times \dfrac{10^{-2}\text{ mol H}^{+}}{\text{1 L solution}} = 10^{-2}\text{ mol H}^{+}$

Solution 2

pH = 12

pOH = 14.00 - pOH = 14.00 - 12 = 2.0

$\text{[OH$^{-}$]}= 10^\text{-pOH} \text{ mol/L} = 10^{\text{-2}} \text{ mol/L}\\ \text{ moles of OH}^{-} = \text{ 1 L solution} \times \dfrac{10^{-2}\text{ mol OH}^{-}}{\text{1 L solution}} = 10^{-2}\text{ mol OH}^{-}$

3. pH after mixing

H⁺ + OH⁻ ⟶ H₂O

I/mol: 10⁻² 10⁻²

C/mol: -10⁻² -10⁻²

E/mol: 0 0

The H⁺ and OH⁻ have neutralized each other. The pH will be that of pure water.

pH = 7

8 0

4 years ago

In a closed system containing three different gases as shown, X2 + Y2 = 2XY

Luden [163]

X2+Y2-2XY=(X-Y)2=0
X=Y

5 0

3 years ago

Identify indicators of a chemical reaction. Check all of the boxes that apply.

Marina CMI [18]

All except for absorption of heat

4 0

1 year ago

if it takes 54 mL of 0.1 NaOH to neutralize 125 mL of an HCL solution, what is the concentration of HCL?

alexira [117]

Answer:

0.0432 M

Explanation:

We are given;

Volume of NaOH as 54 mL

Molarity of NaOH as 0.1 M

Volume of HCl as 125 mL

We are required to determine the concentration of HCl

Step 1; We write a balanced equation for the reaction between NaOH and HCl

The balanced equation is given by;

NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)

Step 2: Determine the number of moles of NaOH

Moles = Volume × molarity

Therefore;

Moles of NaOH = 0.054 L × 0.1 M

= 0.0054 Moles

Step 3: We use the mole ratio to determine the moles of HCl

From the equation;

1 mole of NaOH reacts with 1 mole of HCl

Therefore;

Moles of NaOH = Moles of HCl

Thus; moles of HCl = 0.0054 moles

Step 4: Determine the concentration of HCl

We know that;

Molarity = Moles ÷ Volume

Therefore;

Molarity of HCl = 0.0054 moles ÷ 0.125 L

= 0.0432 M

Therefore, the concentration of HCl is 0.0432 M

6 0

3 years ago