When methane (CH4) gas is burned in the presence of oxygen, the following chemical reaction occurs.

Complete the sentence with the word "element" or "compound. O is a(n)_______ and H2O, is a(n)____

nikdorinn [45]

Answer:

Element; compound

Explanation:

Oxygen is an element on the periodic table, but when it's combined with the element Hydrogen, it produces water, which is a compound (H2O). When two elements combine, it produces a compound.

I hope this helps! :)

8 0

3 years ago

100 PONTS AND BRAINLIEST What is the maximum number of formula units of NaCl in one mole?"

natulia [17]

Answer:

The meaning and usefulness of the mole Page 2 2 • One mole of NaCl contains 6.022 x 1023 NaCl formula units. Use the mole quantity to count formulas by weighing them.

5 0

3 years ago

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Which of the following solutions contains the greatest number of ions?

Elden [556K]

Answer : The correct option is, (A) 300.0 mL of 0.10 M CaCl₂

Explanation :

(a) 300.0 mL of 0.10 M CaCl₂

The dissociation reaction will be:

$CaCl_2(aq)\rightarrow Ca^{2+}(aq)+2Cl^-(aq)$

To calculate the number of moles of CaCl₂ as :

$\text{Moles of }CaCl_2=\text{Concentration of }CaCl_2\times \text{Volume of solution in L}$

$\text{Moles of }CaCl_2=0.10M\times 0.3L=0.03mol$

As, 1 mole of CaCl₂ contains ions = 3

So, 0.03 mole of CaCl₂ contains ions = 0.03 × 3 = 0.09 ions.

(b) 400.0 mL of 0.10 M NaCl

The dissociation reaction will be:

$NaCl(aq)\rightarrow Na^{+}(aq)+Cl^-(aq)$

To calculate the number of moles of NaCl as :

$\text{Moles of }NaCl=\text{Concentration of }NaCl\times \text{Volume of solution in L}$

$\text{Moles of }NaCl=0.10M\times 0.4L=0.04mol$

As, 1 mole of NaCl contains ions = 2

So, 0.04 mole of NaCl contains ions = 0.04 × 2 = 0.08 ions.

(c) 200.0 mL of 0.10 M FeCl₃

The dissociation reaction will be:

$FeCl_3(aq)\rightarrow Fe^{3+}(aq)+3Cl^-(aq)$

To calculate the number of moles of FeCl₃ as :

$\text{Moles of }FeCl_3=\text{Concentration of }FeCl_3\times \text{Volume of solution in L}$

$\text{Moles of }FeCl_3=0.10M\times 0.2L=0.02mol$

As, 1 mole of FeCl₃ contains ions = 4

So, 0.02 mole of FeCl₃ contains ions = 0.02 × 4 = 0.08 ions.

(d) 800.0 mL of 0.10 M sucrose

The dissociation of sucrose is not possible because it is a non-electrolyte.

To calculate the number of moles of sucrose as :

$\text{Moles of }sucrose=\text{Concentration of }sucrose\times \text{Volume of solution in L}$

$\text{Moles of }sucrose=0.10M\times 0.8L=0.08mol$

As, 1 mole of sucrose contains ions = 1

So, 0.08 mole of sucrose contains ions = 0.08 × 1 = 0.08 ions.

Hence, the solutions contains the greatest number of ions is, 300.0 mL of 0.10 M CaCl₂

3 0

3 years ago

I WILL GIVE BRAINLIEST!!!!!!!!!!!!!! Hanson is designing an experiment to test the porosity of a soil sample. His experiment inv

sdas [7]

What would improve Hanson's experiment would be if he:
A. If he measured the volume of the soil beforehand

$Good Luck!$
$Hope This Helps :)$

8 0

3 years ago

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What is the charge on Iodine

True [87]

There is no single charge on iodine (if you are referring to its oxidizing number). Since it can have more than 8 electrons for its outermost shell (really crazy stuff about atomic orbitals!), It can possess many charges. Like it's basic form I- (-1 oxidizing number), IO3- (-7), IO2- (-5), even I3-!

8 0

3 years ago