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amid [387]
3 years ago
7

True or false: the density of an object can be calculated by dividing its length by its width.

Chemistry
2 answers:
sergiy2304 [10]3 years ago
7 0
False.........................
solong [7]3 years ago
3 0
This is true!!!!!!!!!!!!!!!!!!!!!!!!
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Suppose a 10.0 mL sample of an unknown
mote1985 [20]

The concentration of HCl is equal to 2.54mol/L.

<h3>Mole calculation</h3>

To solve this question, one must use the molarity calculation, which corresponds to the following expression:

                                               M = \frac{mol}{v}

Thus, to find the molarity of the sample, the following calculations must be performed:

V_f = 10ml + 625ml = > 635ml

                                              \frac{0.004mol}{xmol} =\frac{1000ml}{635ml}

                                                 x = 0.00254 mol

So, 0.00254 moles were added per 10ml, so we can do:

                                              \frac{0.00254mol}{xmol}= \frac{10ml}{1000ml}  \\x = 2.54mol/L

So, the concentration of HCl is equal to 2.54mol/L.

Learn more about mole calculation in: brainly.com/question/2845237

6 0
2 years ago
When a coil of wire is connected to a batter, an electric current flows through it. True or False​
gizmo_the_mogwai [7]

Answer:

True i think.

Explanation:

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Why are scientists interested in exploring Mars? A. possible existence of sulfur vents B. possibility of mining minerals C. poss
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<span> B. possibility of mining minerals</span>
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How do you balance C6H12O6 + O2 --&gt; CO2 + H2O?
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<span>C6H12O6 + O2 --> CO2 +H2O </span>

<span>In the balancede form we have: </span>

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Where do you find a valence electron?
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Answer:

In chemistry, valence electrons are the electrons that are located in the outermost electron shell of an element.

Explanation:

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