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mixas84 [53]
2 years ago
15

Is the chemical equation balanced? Yes or no

Chemistry
2 answers:
Strike441 [17]2 years ago
6 0
I think it is not so no
irinina [24]2 years ago
5 0

Answer:

<em><u>Yes the equation is balanced </u></em>

Explanation:

<em>There</em><em> </em><em>is</em><em> </em><em>2Na</em><em> </em><em>and</em><em> </em><em>2F</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em> </em><em>which</em><em> </em><em>means</em><em> </em><em>LHS</em><em>=</em><em>RHS</em><em>.</em><em> </em><em>Hence</em><em>,</em><em>its</em><em> </em><em>balanced</em><em>.</em><em> </em>

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Which has a greater volume, 10 grams of water or 10 grams of acetone?
WINSTONCH [101]

Density is defined as the ratio of mass to the volume.

Density = \frac{Mass}{Volume}          (1)

Mass of water = 10 grams

Mass of acetone  = 10 grams

Density of water  = 1 \frac{g}{cm^{3}}

Density of acetone  = 0.7857 \frac{g}{cm^{3}}

Put the value of density of water and its mass in equation (1)

1 \frac{g}{cm^{3}} =  \frac{10 g}{volume}

Volume of water =  10 cm^{3}

Put the value of density of acetone and its mass in equation (1)

0.7857 \frac{g}{cm^{3}} =  \frac{10 g}{volume}

Volume of acetone = 12.72 cm^{3}

Thus, volume of acetone is more than volume of water because the density of acetone is lower.

6 0
2 years ago
The scientific method includes which of the following? Select all that apply. question analysis hypothesis theory
adell [148]

a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.


8 0
2 years ago
Read 2 more answers
A 0.0000792 M sample of Compound X in a solvent has an absorbance of 0.341 at 528 nm in a 1.000-cm cuvet. The solvent alone has
natima [27]

Answer:

a) a = 3485 M⁻¹cm⁻¹

b) C = 0,000127 M

Explanation:

Lambert-Beer law says that there is a linear relationship between absorbance and concentration of a chemical substance. The formula is:

A = a×b×C

Where A is absorbance, a is molar absorptivity, b is path length and C is concentration.

a) In the problem Concentration is 0.0000792 M, b is 1,000cm and Absorbance is absorbance of sample-absorbance of blank: 0,341-0,065 = 0,276

Replacing:

0,276 = a×1,000cm×0,0000792M

<em>a = 3485 M⁻¹cm⁻¹</em>

b) As the experiment consist in the same compound in the same solvent, the molar absorptivity will be the same, a = 3485 M⁻¹cm⁻¹, path length will be 1,000cm and absorbance: 0,508-0,065 = 0,443

Replacing:

0,443 = 3485 M⁻¹cm⁻¹×1,000cm×C

<em>C = 0,000127 M </em>

<em></em>

I hope it helps!

8 0
2 years ago
*PLEASE HELP ASAP*
dimulka [17.4K]
I believe its true , because when two elements form different compounds a given mass of one element will combine with the other , during any chemical change atoms arent created or destroyed they are jus rearranged
5 0
3 years ago
PLEASE HELP When I combine Sprite with a sour candy, it starts to bubble a lot. Is this a physical or chemical change?
maksim [4K]

Answer:

B. chemical

Explanation:

Chemical change cannot go back to its original form

4 0
2 years ago
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