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aleksandr82 [10.1K]
4 years ago
6

Calculate the number of grams of CH_3COOH in the vinegar.

Chemistry
1 answer:
AysviL [449]4 years ago
6 0
<span>when density in g/ml
9.86ml CH3COOH (X g/1ml) = g
1.049g/ml
9.86ml (1.049g/1ml) = 10.343 g
hope it helps
</span>
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Antimony has 2 naturally occurring isotopes. The mass of antimony-121 is 120.904 amu and the mass of antimony-123 is 122.904 amu
Sav [38]
Wow, now this one is a hard one, took me quite a while to figure it out but here it is:
120.904(x)+122.904(1-x)=121.76 \\ &#10;120.904x-122.904x+122.904=121.76 \\ &#10;-2x+122.904=121.76 \\ &#10;-2x=-1.144 \\ &#10;x=.572  \\ &#10;1-.572=.428
The abundances of the two isotopes is:
Antimony-121 = 57.2%
Antimony-123 = 42.8%
6 0
4 years ago
Which layer of the atmosphere is between the stratosphere and the thermosphere
Drupady [299]
Mesosphere is what is in between
4 0
3 years ago
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What is the mass in grams of 2.25 mol of the element iron, Fe?
scZoUnD [109]
<h3>Answer:</h3>

126 g Fe

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

2.25 mol Fe

<u>Step 2: Identify Conversions</u>

Molar Mass of Fe - 55.85 g/mol

<u>Step 3: Convert</u>

  1. Set up:                              \displaystyle 2.25 \ mol \ Fe(\frac{55.85 \ g \ Fe}{1 \ mol \ Fe})
  2. Multiply:                            \displaystyle 125.663 \ g \ Fe

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

125.663 g Fe ≈ 126 g Fe

4 0
3 years ago
The amino acid isoleucine has pKa values of 2.32 (–COOH) and 9.76 (–NH3+). What is the predominant form of the amino acid at pH
Aneli [31]

Answer:

PI = 6.04

In the attached figure are the missing hydrogen atoms

Explanation:

Given both pk, the isoelectric point will be equal to:

PI = (1/2)*(pka + pka2), where pka = 2.32 and pka2 = 9.76

PI = (1/2)*(2.32 + 9.76) = 6.04

5 0
3 years ago
A bottle rocket experiences a 500 N force to the right and 300 N of air resistance to the left. Will it accelerate to the left,
Finger [1]
<h2>Answer 1) Right </h2><h3> Explanation :  </h3>

To find that the acceleration will be on right or left, we need to find the net force between them.


Which is Net F = 500 N - 300 N = 200 N  


Therefore, the acceleration will be on right side as it has greater difference as compared to left.



<h2>Answer 2) Left </h2><h3> Explanation : </h3>

Here, the right side will have 2 forces of 8 N which gives the total of 16 N.  

Using the net force calculation = 20 N - 16 N = 4 N.


Therefore, the box will accelerate towards left-side.



<h2>Answer 3) Right </h2><h3>Explanation : </h3>

In this case, the car is experiencing +300 N to the right and -150 N on left.


On calculating the net force = +300 N- 150 N = +150 N.


Here, right side has 150 N greater force than left side. Therefore, the car will accelerate towards right.



<h2>Answer 4) Right </h2><h3>Explanation : </h3>

The rope will move towards right as the net force will be 10 N towards right.


By calculating the net force = 410 N - 400 N = 10 N.


This clearly indicates that the rope will move towards right.



<h2>Answer 5) Right </h2><h3>Explanation: </h3>

The skateboard will accelerate towards right as the force will be 10 N more on right than on left.


As the net force will be = 100 N - 90 N = 10 N.


Since, the 10 N more force is on right the acceleration will be on right.



<h2>Answer 6) Left </h2><h3>Explanation : </h3>

The box will experience acceleration towards left as there will be greater 1 N force on left as compared to right.


On calculating the net force = 20 N - 19 N = 1 N


This shows that the box will accelerate on left side.

4 0
4 years ago
Read 2 more answers
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