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kirill [66]
3 years ago
9

What does the cell theory state? Answer F All organisms are composed of a nucleus G All prokaryotes are composed of multiple cel

ls H All prokaryotes are single celled organisms J All organisms are composed of cells
Chemistry
1 answer:
Sav [38]3 years ago
3 0

Answer:

(J) All organisms are composed of cells

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You are given a sulfuric acid solution of unknown concentration. You dispense 10.00 mL of the unknown solution into an Erlenmeye
dmitriy555 [2]

Answer:

"0.053457 M" of sulfuric acid.

Explanation:

The given values are:

V = 10 mL solution

V_{added} = 12.20 mL

V_{total} = 22.20 mL

then,

M 0.103 M of NaOH,

V_{rinsed} = experiment  will not be affected

V_{total \ base} = 10.38 mL

Now,

⇒  mol of NAOH = MV

                            = 0.103\times 10.38

                            =  1.06914  \ m

Whether Sulfuric acid, then

⇒  H_{2}SO_{4} + 2NaOH = Na_{2}SO_{4} + 2H_{2}O

⇒  mol \ of \ acid =\frac{1}{2}\times \ mol \   of  \ base

⇒  1.06914 \ m \ mol \ of \ base = \frac{1}{2}\times 1.06914 = 0.53457 \ m \ mol \ of \ acid

Before any dilution:

V_{sample} = 10  \ mL

⇒  M \ acid = \frac{m \ mol}{V}

                 =\frac{ 0.53457 }{10}

                 =0.053457 \ M (Sulfuric acid)

6 0
3 years ago
How many valence electrons does B (boron) have?<br> A. 13<br> B. 5<br> C. 10<br> D. 3
pshichka [43]

Answer:

Boron has 3 valence electrons

8 0
3 years ago
I need help with the first question, if you can help with the other two I would really appreciate it!​
Lorico [155]

Answer:

5

Explanation:

6 0
3 years ago
Pls help
erik [133]
<span>Hello!
 
The statement that best proves that the law of conservation is obeyed during this process is that </span><span>The total mass of oxygen and carbon is equal to the total mass of carbon dioxide.

The chemical equation for the combustion reaction of coal in the carbon cycle is the following one:

C(s) + O</span>₂(g) → CO₂(g)
<span>
From this simple chemical equation, we can conclude that if the Law of Conservation of Matter is obeyed in this reaction, the sum of the initial masses of Carbon and Oxygen before the reaction will be equal to the total amount of Carbon Dioxide formed by it, because they sum up to produce Carbon Dioxide.

Have a nice day!</span>
4 0
3 years ago
Read 2 more answers
A certain flexible weather balloon contains 3.5 L of helium gas. Initially, the balloon is in WP at 8500ft, where the temperatur
Advocard [28]

Answer:

\large \boxed{\text{3.9 L}}

Explanation:

We can use the Combined Gas Laws to solve this problem

\dfrac{p_{1}V_{1} }{T_{1}}  =  \dfrac{p_{2}V_{2}}{T_{2}}

Data

p₁ = 571.2 Torr;  p₂ = 400 Torr

V₁ = 3.5 L;          V₂ = ?

T₁ = 21.5 °C;        T₂ = 6.8 °C

Calculations

(a) Convert the temperatures to kelvins

T₁ = (21.55 + 273.15) K = 294.70 K

T₂ =   (6.8  + 273.15) K = 279.95  K

(b) Calculate the new volume

\begin{array}{rcl}\dfrac{p_{1}V_{1} }{T_{1}} & = & \dfrac{p_{2}V_{2}}{T_{2}}\\\\\dfrac{\text{571.2 Torr $\times$ 3.5 L}}{\text{294.65 K}} & = & \dfrac{\text{400 Torr} \times V_{2}}{\text{279.95 K}}\\\\\text{6.78 L} & = & \text{1.429V}_{2}\\\\V_{2} & = & \textbf{4.7 L}\\\end{array}\\\text{The new volume of the balloon is $\large \boxed{\textbf{4.7 L}}$}

3 0
3 years ago
Read 2 more answers
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