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stiv31 [10]
3 years ago
10

5.

Chemistry
1 answer:
strojnjashka [21]3 years ago
8 0
I think b because it talks more about the question
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Two factors that determine kinetic energy are
Anna11 [10]
Your answer is mass and speed! Please give me brainlist :)
4 0
3 years ago
Read 2 more answers
Which of the following samples will have the lowest pressure if they are all at the same temperature and in identical containers
snow_lady [41]

Answer:

c. 15 g Kr

Explanation:

The amount of a gas (Moles) is directely proportional to its pressure. That means the higher amount of moles, the highest pressure and vice versa.

Using molar mass of the compounds (Ne=20.2g/mol, Ar = 39.9g/mol, Kr = 83.8g/mol, CO₂ = 44 g/mol and F₂ = 38.0g/mol), moles of 15.0g of each gas are:

Ne = 15g ₓ (1mol / 20.2g) = <em>0.74 moles of Ne</em>

Ar = 15g ₓ (1mol / 39.9g) = <em>0.38 moles of Ar</em>

Kr = 15g ₓ (1mol / 83.8g) = <em>0.18 moles of Kr</em>

CO₂ = 15g ₓ (1mol / 44g) = <em>0.34 moles of CO₂</em>

F₂ = 15g ₓ (1mol / 38g) = <em>0.39 moles of F₂</em>

<h3>As 15g of Kr contains the less quantity of moles, this sample will con have the lowest pressure</h3>
8 0
3 years ago
Covalent bonds are in the air you breathe and the water you drink. How are covalent bonds formed?
kramer
Covalent bond is the term that is being used to describe the bonds in the compounds that are created due to the sharing of one or more electrons. One of the best example of the simplest covalent bond is the bond that is being created when two isolated hydrogen atoms come together to form an H2 molecule. An isolated hydrogen atom has one proton and electron being combined by the force of attraction from the opposite-charged articles. When a pair of isolated hydrogen atom combines, two forces of attraction are created coming from each of the isolated hydrogen atom.
5 0
3 years ago
calculate how many milliliters of 0.142 M NaOH are needed to completely neutralize 21.4 mL of 0.294 M H2C4H4O6.
Flura [38]

Answer:

The answer to your question is 88.7 ml

Explanation:

Data

Volume = ?

Concentration of NaOH = 0.142 M

Volume of H₂C₄H₄O₆ = 21.4 ml

Concentration of H₂C₄H₄O₆ = 0.294 M

Balanced chemical reaction

               2 NaOH + H₂C₄H₄O₆  ⇒  Na₂C₄H₄O₆  +  2H₂O

1.- Calculate the moles of H₂C₄H₄O₆

Molarity = moles/volume

Solve for moles

moles = Molarity x volume

Substitution

moles = 0.294 x 21.4/1000

Result

moles = 0.0063

2.- Use proportions to calculate the moles of NaOH

              2 moles of NaOH ------------------ 1 moles of H₂C₄H₄O₆

               x                           ------------------ 0.0063 moles

               x = (0.0063 x 2) / 1

               x = 0.0126 moles of NaOH

3.- Calculate the volume  of NaOH

Molarity = moles / volume

Solve for volume

Volume = moles/Molarity

Substitution

Volume = 0.0126/0.142

Result

Volume = 0.088 L or 88.7 ml

3 0
3 years ago
What is the mass in grams of 0.687 moles of NH three
stepan [7]
NH3 = 14 +3*1=17 g/mol
Mass = mol * molar mass = 0.687 * 17= 11.679 g
Can u mark it brainliest?
3 0
3 years ago
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