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Mariulka [41]
3 years ago
6

-QUESTION 5-

Chemistry
1 answer:
vodomira [7]3 years ago
5 0
The tall trees much of the sun
have you ever been in a forest? if you have, you’ve probably noticed that it’s usually very shady, and not a lot of sunlight hits the ground. That’s cause the tall trees are so dense, the sunlight doesn’t reach the ground
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A series of six solutions was prepared at the given concentrations. Sample A B C D E F Concentration (mM) 50 100 150 200 300 400
ioda

Answer:

300 mM

Explanation:

In order to solve this problem we need to calculate the line of best fit for those experimental values. The absorbance values go in the Y-axis while the concentration goes in the X-axis. We can calculate the linear fit using Microsoft Excel using the LINEST function (alternatively you can write the Y data in one column and X data in another one, then use that data to create a dispersion graph and finally add the line of best fit and its formula).

The <u>formula for the line of best fit for this set of data is</u>:

  • y = 0.005 * x

So now we <u>calculate the value of </u><u><em>x</em></u><u> when </u><u><em>y</em></u><u> is 1.50</u>:

  • 1.50 = 0.005 * x
  • x = 300 mM

7 0
3 years ago
0 Balance the following equation: CO2 (g) + H2O (1) → C12H24012 (s) + O2 (g) +​
Drupady [299]

Explanation:

Answer: 12CO2(g) +12H2O(l)->C12H24O12(s)+12O2(g)

Once you make balancing equations don't disturb the given numbers because it is fix you need to solve by the side of the chemical name.

5 0
3 years ago
A sample of Ni(CO)4, a toxic transition-metal complex, has 5.23 x 10^24 atoms of carbon. How many atoms of Ni does it contain?
miss Akunina [59]
In Ni(CO)₄ the stoichiometry of Ni to C is 1:4
for every 4 atoms of C is attached to one Ni atom.
this means that if there are 4 atoms of C - 1 atom of Ni
in 5.23 x 10²⁴ atoms of C -1/4 x 5.23 x 10²⁴ atoms of Ni
                                        = 1.3075 x 10²⁴ atoms of Ni
the number of atoms rounded off to the second decimal place = 1.31 x 10²⁴ atoms 
correct answer is E
3 0
3 years ago
Read 2 more answers
What are the spectators ions in this reaction?
miv72 [106K]

Answer:

Option C. Na⁺(aq) and Cl¯(aq)

Explanation:

From the question given above, we obtained the following:

Na₂SO₄(aq) + CaCl₂(aq) —> CaSO₄(s) + 2NaCl(aq)

Ionic Equation:

2Na⁺(aq) + SO₄²¯(aq) + Ca²⁺(aq) + 2Cl¯(aq) —> CaSO₄(s) + 2Na⁺(aq) + 2Cl¯(aq)

From the ionic equation above, we can see that Na⁺(aq) and Cl¯(aq) are present on both side of the equation.

Therefore, Na⁺(aq) and Cl¯(aq) are the spectator ions because they did not participate directly in the reaction.

4 0
3 years ago
9.50 L of Fluorine gas at STP reacts with 6.945x1024 formula units of Chromium (VI) chloride.
lorasvet [3.4K]

Answer:

Again please specify your question, you still haven't indicated what you want to be solved.

by formula units I assume you mean atoms?

I'll edit my answer accordingly if you could specify down in the comments.

8 0
3 years ago
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