How many moles of Fe2O3 are in 17.2g?<br><br> A - 1.23<br> B - 2.75<br> C - 0.239<br> D

What is the name of the society that scientist form to bring about use one universal system of measurements? (Please hurry)

Katarina [22]

The International Bureau of Weights and Measures is the society that scientist form to bring about one universal system of measurements.

<u>Explanation:</u>

Every theoretical assumptions should be proved experimentally and for that we need a specific system to measure or quantify parameters used in those experiments or the outcome results variables.

The measurements of length should be done by measuring them in meters only and not by liters. The physical properties of every materials should have a particular way of measuring them and this is decided by the International Bureau of Weights and Measures.

They also decide the units of each measurements and the standardization of each units and weights are also done by this society.

6 0

3 years ago

Solve these Please. (15 points)

Ghella [55]

Answer:

1) 4Fe + 3O2 → 2Fe2O3

2) H2 + Cl2 → 2HCl

3) 2Ag + H2S → Ag2S + H2

4) CH4 + 2O2 → CO2 + 2H2O

5) 2HgO → 2Hg + O2

6) 2Co + 3H2O → Co2O3 + 3H2

3 0

3 years ago

Classify the following substances as strong electrolytes, weak electrolytes, or nonelectrolytes:

bekas [8.4K]

Calcium acetate [Ca(C₂H₃O₂)₂] is strong electrolytes

<h3>What is the calcium acetate's mode of action?</h3>

End-stage renal disease patients on dialysis who have hyperphosphatemia (excess phosphate in the blood) are treated with calcium acetate. By forming a bond with the phosphate in your diet, calcium acetate causes it to leave your body without being absorbed.

Heat is created as calcium acetate dissolves in water, and as the temperature rises, the solubility of the calcium acetate increases.

When heated, calcium acetate, a somewhat water-soluble crystalline calcium source, breaks down to form calcium carbonate.

learn more about electrolyte refer:

brainly.com/question/17089766

#SPJ4

8 0

2 years ago

Calculate the mass of 1.33 mol of copper (II) sulphate

nikklg [1K]

Answer:

a) 13g

Explanation:

5 0

3 years ago

For the decomposition of gaseous dinitrogen pentaoxide, 2 N2O5(g)→4 NO2(g) + O2(g) the rate constant is k = 2.8 × 10−3 s−1 at 60

kozerog [31]

Answer:

(a) The concentration of $N_{2}O_{5}$ after 5.00 min is 0.9672 mol/L

(b) The fraction of $N_{2}O_{5}$ decomposed after 5.00 min is 0.568

The problem can be solved by using first order integrated reaction.

Explanation:

(a)

Rate constant of reaction = K = $2.8\times 10^{-3}$ $s^{-1}$

Initial concentration of $N_{2}O_{5}$ = 2.24 mol/L

Assuming final concentration of $N_{2}O_{5}$ to be x mol/L

time (t) = 5.00 min

The first order integrated equation is shown below

$\textrm{t} = \displaystyle \frac{2.303}{K}\textrm{log}\frac{\textrm{Initial concentration of } N_{2}O_{5}}{\textrm{Final concentration of } N_{2}O_{5}} \\\left ( 5.00\times 60 \right )\textrm{ sec} = \displaystyle \frac{2.303}{2.8\times 10^{-3}s^{-1}}\textrm{log}\frac{2.24 \textrm{ mol/L}}{x} \\x = 0.9672 \textrm{ mol/L}$

Concentration of $N_{2}O_{5}$ decomposed = 0.9672 mol/L

(b)

Concentration of $N_{2}O_{5}$ decomposed = $\left ( 2.24-0.9672 \right )\textrm{ mol/L} = 1.273 \textrm{ mol/L}$

Fraction of $N_{2}O_{5}$ decomposed = $\displaystyle \frac{1.273 \textrm{ mol/L}}{2.24 \textrm{ mol/L}} = 0.568$

6 0

3 years ago

Read 2 more answers

How many moles of Fe2O3 are in 17.2g? A - 1.23 B - 2.75 C - 0.239 D - 0.108