Anong sagot po pleasss

Lead(II) nitrate, Pb(NO3)2, and potassium iodide, KI net ionic equation:

MissTica

Answer:

Pb²⁺ (aq) + 2I⁻ (aq) → PbI₂ (s)

General Formulas and Concepts:

Solubility Rules
Reaction Prediction

Explanation:

Step 1: RxN

Pb(NO₃)₂ (aq) + KI (aq) → PbI₂ (s) + KNO₃ (aq)

Step 2: Balance RxN

Pb(NO₃)₂ (aq) + 2KI (aq) → PbI₂ (s) + 2KNO₃ (aq)

Step 3: Ionic Equations

Total Ionic Equation:

Pb²⁺ (aq) + 2NO₃⁻ (aq) + 2K⁺ (aq) + 2I⁻ (aq) → PbI₂ (s) + 2K⁺ (aq) + 2NO₃⁻ (aq)

Cancel out spectator ions.

Net Ionic Equation:

Pb²⁺ (aq) + 2I⁻ (aq) → PbI₂ (s)

7 0

3 years ago

Unwanted elements are removed from metals by a process called

Grace [21]

Answer:

C. Refining

Explanation:

Refining process removes elements from a substance

6 0

2 years ago

When methane (CH4) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbalanced equation for this reacti

babunello [35]

Answer:

For A: The mass of carbon dioxide produced is 0.00303 grams.

For B: The mass of water produced is 0.0025 grams.

For C: The mass of oxygen gas produced is 0.0044 grams.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For methane:

Given mass of methane = $1.10\times 10^{-3}g$

Molar mass of methane = 16 g/mol

Putting values in equation 1, we get:

$\text{Moles of methane}=\frac{1.10\times 10^{-3}g}{16g/mol}=6.875\times 10^{-5}mol$

The chemical equation for the combustion of methane follows:

$CH_4+2O_2\rightarrow CO_2+2H_2O$

For A:

By Stoichiometry of the reaction:

1 mole of methane produces 1 mole of carbon dioxide

So, $6.875\times 10^{-5}mol$ of methane will produce = $\frac{1}{1}\times 6.875\times 10^{-5}=6.875\times 10^{-5}mol$ of carbon dioxide

Now, calculating the mass of carbon dioxide from equation 1, we get:

Molar mass of carbon dioxide = 44 g/mol

Moles of carbon dioxide = $6.875\times 10^{-5}$ moles

Putting values in equation 1, we get:

$6.875\times 10^{-5}mol=\frac{\text{Mass of carbon dioxide}}{44g/mol}\\\\\text{Mass of carbon dioxide}=(6.875\times 10^{-5}mol\times 44g/mol)=0.00303g$

Hence, the mass of carbon dioxide produced is 0.00303 grams.

For B:

By Stoichiometry of the reaction:

1 mole of methane produces 2 moles of water

So, $6.875\times 10^{-5}mol$ of methane will produce = $\frac{2}{1}\times 6.875\times 10^{-5}=1.375\times 10^{-4}mol$ of water

Now, calculating the mass of water from equation 1, we get:

Molar mass of water = 18 g/mol

Moles of water = $1.375\times 10^{-4}$ moles

Putting values in equation 1, we get:

$1.375\times 10^{-4}mol=\frac{\text{Mass of water}}{18g/mol}\\\\\text{Mass of water}=(1.375\times 10^{-4}mol\times 18g/mol)=0.0025g$

Hence, the mass of water produced is 0.0025 grams.

For C:

By Stoichiometry of the reaction:

1 mole of methane reacts with 2 moles of oxygen gas

So, $6.875\times 10^{-5}mol$ of methane will react with = $\frac{2}{1}\times 6.875\times 10^{-5}=1.375\times 10^{-4}mol$ of oxygen gas

Now, calculating the mass of oxygen gas from equation 1, we get:

Molar mass of oxygen gas = 32 g/mol

Moles of oxygen gas = $1.375\times 10^{-4}$ moles

Putting values in equation 1, we get:

$1.375\times 10^{-4}mol=\frac{\text{Mass of oxygen gas}}{32g/mol}\\\\\text{Mass of oxygen gas}=(1.375\times 10^{-4}mol\times 32g/mol)=0.0044g$

Hence, the mass of oxygen gas produced is 0.0044 grams.

3 0

4 years ago

Which shows the correct order of steps when using natural gas to generate electricity?

bulgar [2K]

I think B would be the most reasonable answer, the steps all seem to make sense

8 0

3 years ago

Read 2 more answers

WHICH IS WHICH?

Aleksandr-060686 [28]

Answer:

- First: element.

- Second: Compound.

- Third: element.

- Fourth: Compound.

Explanation:

Hello.

In this case, since elements are composed the same atom and compounds are composed by two different atoms, we can see that:

- First: it is an element as each sphere seems to be the same.

- Second: It is a compound as two different type of spheres are shown, white and black, considering each sphere is a different element.

- Third: it is an element because the spheres are equal, in fact, it is a diatomic element as two atoms are joined per molecule.

- Fourth: It is a compound as well since each molecule has two colored spheres and one white sphere, meaning that it has two different atoms per molecule.

Best regards.!

8 0

4 years ago

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