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Mamont248 [21]
3 years ago
14

Describe the structure of an Atom (HELP!)

Chemistry
1 answer:
Marat540 [252]3 years ago
4 0

Answer:

The answer is A.

Explanation:

Neutrons and protons are located in the dense middle of the atom called the nucleus, and electrons are located on the electron cloud located outside of the nucleus.

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You have 25.0mL HCl of unknown concentration. It takes 12.5 mL of 0.2 M NaOH to neutralize the acid. Determine the concentration
Ugo [173]

Answer:

1) The concentration of HCl = 0.1 M.

2) The table that can be used to organize the information correctly is C.

Explanation:

<u><em>1) The concentration of HCl:</em></u>

  • We know that the no. of millimoles of the acid is equal to the no. of millimoles of the base at the neutralization point.

which means that: <em>(MV)HCl = (MV)NaOH,</em>

M of HCl = ??? M, V of HCl = 25.0 mL.

M of NaOH = 0.2 M, V of NaOH = 12.5 mL.

∴ M of HCl = (MV)NaOH/V of HCl = (0.2 M)(12.5 mL)/(25.0 mL) = 0.1 M.

<em>2) The table that can be used to organize the information correctly is C</em>

<em></em>

<em>Table A and B are the same and reported volume of HCl and NaOH is wrong.</em>

<em>Table C is right, contain the correct volumes and concentration of NaOH and missed the concentration of HCl which is 0.1 M.</em>

<em>Table D reported the volume and the concentration of HCl wrongly and also the concentration of NaOH. The data reported of HCl and NaOH is reversed.</em>

6 0
3 years ago
The pressure of a 5.0 L sample of gas changes from 3.0 atm to 10.0 atm while the temperature remains constant. What is the gas’s
lina2011 [118]

Answer:

<h2>The answer is 1.5 L</h2>

Explanation:

The new volume can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

Since we are finding the new volume

V_2 =  \frac{P_1V_1}{P_2}  \\

From the question we have

V_2 =  \frac{5 \times 3}{10}  =  \frac{15}{10}  =  \frac{3}{5}  \\

We have the final answer as

<h3>1.5 L</h3>

Hope this helps you

8 0
3 years ago
Fill in the blanks to complete the sentence.
Luba_88 [7]

Answer:

metallic bond

Explanation:

Metallic bonding is the type of bonding metal atoms undergo. The bond is formed through the electrostatic attraction between a lattice of positive ions and negative delocalized electrons. The lattice of cations is surrounded by a sea of delocalized electrons.

4 0
3 years ago
Imagine you are digging a hole to the center of the earth. In which order would dig through them?
nadezda [96]

The order in which you would dig through the layers is

crust → upper mantle → lower mantle → outer core → inner core

See the image below.

4 0
4 years ago
Read 2 more answers
Using the balanced equation below, how many moles of water can be produced when 4 grams of Hydrogen react? 2H2(g)+O2(g) —&gt; 2H
gavmur [86]

Answer:

4 × 10 g

Explanation:

Step 1: Write the balanced equation

2 H₂(g) + O₂(g) ⇒ 2 H₂O(I)

Step 2: Calculate the moles corresponding to 4 g of H₂

The molar mass of H₂ is 2.02 g/mol.

4 g × 1 mol/2.02 g = 2 mol

Step 3: Calculate the moles of H₂O produced from 2 moles of H₂

The molar ratio of H₂ to H₂O is 2:2. The moles of H₂O produced are 2/2 × 2 mol = 2 mol.

Step 4: Calculate the mass corresponding to 2 moles of H₂O

The molar mass of H₂O is 18.02 g/mol.

2 mol × 18.02 g/mol = 4 × 10 g

7 0
3 years ago
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