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kondor19780726 [428]

3 years ago

6

When elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that

make it. true or false

2 answers:

vladimir2022 [97]3 years ago

6 0

Answer:

True

Explanation:

guapka [62]3 years ago

5 0

True i really don’t feel like giving an explanation but trust me it’s trye

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7.55 grams of P4 and 7.55 grams of O2 react according to the following reaction:

alekssr [168]

Answer:

a) The limiting reactant is O2.

b) 7.57 grams of P4O10 is produced

c) 7.53 grams P4O6 remains

Explanation:

Step 1: Data given

Mass of P4 = 7.55 grams

Mass of O2 = 7.55 grams

Molar mass of P4 = 123.90 g/mol

Molar mass of O2 = 32 g/mol

Step 2: The balanced equations:

P4 + 3O2-→P4O6

P4O6 + 2O2 → P4O10

Step 3: Calculate moles P4

Moles P4 = mass P4 / molar mass P4

Moles P4 = 7.55 grams / 123.90 g/mol

Moles P4 = 0.0609 moles

Step 4: Calculate moles O2

Moles O2 = 7.55 grams / 32.0 g/mol

Moles O2 = 0.236 moles

Step 5: Calculate the limiting reactant

For 1 mol P4 we need 3 moles O2 to produce 1 mol P4O6

P4 is the limiting reactant. It will completely be consumed. (0.0609 moles)

O2 is in excess. There will react 3*0.0609 = 0.1827 moles

There will remain 0.236 - 0.1827 = 0.0533 moles O2

Step 6: Calculate moles P4O6

For 1 mol P4 we need 3 moles O2 to produce 1 mol P4O6

For 0.0609 moles P4 we will have 0.0609 moles P4O6

Step 7: Calculate limting reactant

There remain 0.0533 moles O2 and there are 0.0609 moles P4O6 produced

For 1 mol P4O6 we need 2 moles O2 to produce 1 mol P4O6

<u>The limiting reactant is O2.</u> It will completely be reacted (0.0533 moles)

There will react 0.0533/2 = 0.02665 moles

There will remain 0.0609 - 0.02665 = 0.03425 moles P4O6

This is 0.03425 moles * 219.88 g/mol = <u>7.53 grams P4O6</u>

Step 8: Calculate moles P4O10

For 1 mol P4O6 we need 2 moles O2 to produce 1 mol P4O6

For 0.0533 moles O2, we'll have 0.0533/2 = 0.02665 moles P4O10

Step 9: Calculate mass P4O10

Mass P4O10 = 0.02665 moles * 283.89 g/mol

Mass P4O10 = <u>7.57 grams</u>

7 0

3 years ago

How do the hours of daylight change throughout the year in Reno, NV?

Ivahew [28]

Answer:

Option 2

Explanation:

-

Hope that helps

6 0

2 years ago

For the following reaction, 15.2 grams of chlorine gas are allowed to react with 8.46 grams of water .

Komok [63]

To solve this problem, you must first balance the chemical equation and then identify the limiting reactant. The balanced reaction is 3Cl2 + 3H2O = 5HCl + HClO3. Next is finding the limiting reactant. To do this, you have to compare each reactant to the same product. 15.2 g of chlorine gas (Cl2), is equal to 0.214 mols of chlorine gas, and the mol to mol ratio of chlorine gas to hydrochloric acid is 3:5. So, for every 3 mols of Cl2 gas, there are 5 mols of HCl. 0.214mols Cl2 times (5/3) gives you 0.357 mols of HCl. Next you have to go through the same process except with water. 8.46g water divided by 18.016g water per mol = 0.470 mols H2O. The mol to mol ration is still 3:5, so 0.470 times (5/3), which gives you 0.783mols HCl. A chemical reaction is limited based on the amount of reactants present, and so the reaction is limited by whichever reactant runs out first. In this case, the limiting reactant is chlorine gas because it produced a smaller amount of HCl, and therefore the “limit” of the reaction. This means that the maximum amount of HCl that can form is 0.357 mols, or 13.016 grams of HCl if the answer is supposed to be given in grams.

5 0

3 years ago

Example of a stimulas and response in a organism

Goryan [66]

Answer:

Stimulus

Explanation:

Any change in an organism's environment that causes the organism to react. It is a scientific way of saying “cause”. Example: An animal is cold so it moves into the sun. Response: how the organism reacts to a stimulus and results in a change in behavior.

sorry if this isn't the answer you wanted

3 0

3 years ago

Describe what does happen to the electrons when metal atoms are bonded together.

tankabanditka [31]

Answer: In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions. Metals are shiny.

Explanation: Hope this helped!

4 0

3 years ago