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4 years ago

Which metalloid has five valence electrons in the fourth electron shell?

Chemistry

2 answers:

Alex17521 [72]4 years ago

7 0

I think its arsenic. :)

Olenka [21]4 years ago

6 0

Answer:

D. Arsenic

Explanation:

Edgenuity

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A bicycle pump contains 250 mL of air at a pressure of 102 kPa. If the pump is

CaHeK987 [17]

Considering the Boyle's law, the new volume becomes 1,148,344.444 mL or 1148.34 L.

<h3>Boyle's law</h3>

Boyle's law relates pressure and volume, stating that the volume occupied by a given mass of gas at constant temperature is inversely proportional to pressure. This means that if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

P×V=k

Now it is possible to assume that you have a certain volume of gas V1 which is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and the following is true:

P1×V1=P2×V2

<h3>New volume</h3>

In this case, you know:

P1= 102 kPa= 10335.1 atm (being 1 kPa= 101.325 atm)
V1= 250 mL
P2= 2.25 atm
V2= ?

Replacing in the Boyle's law:

10335.1 atm ×250 mL= 2.25 atm×V2

Solving:

(10335.1 atm ×250 mL)÷ 2.25 atm= V2

Finally, the new volume becomes 1,148,344.444 mL or 1148.34 L.

Learn more about Boyle's law:

brainly.com/question/4147359

#SPJ1

3 0

2 years ago

How many grams of NaC2H3O2 are needed to prepare 350. mL of a 2.75 M solution? (molar mass of

shepuryov [24]

Answer:

78.96 g of NaC2H3O2

Explanation:

We are given;

Volume of the solution as 350 mL
Molarity of the solution as 2.75 M
Molar mass of the solute NaC2H3O2 as 82.04 g/mol

We are required to determine the mass of the solute;

First we determine the number of moles;

Moles = Molarity × Volume

Therefore;

Moles of the solute = 2.75 M × 0.350 L

= 0.9625 moles

Second, we determine the mass

Mass = Moles × Molar mass

= 0.9625 moles × 82.04 g/mol

= 78.9635 g

= 78.96 g

Therefore, the mass of NaC2H3O2 needed is 78.96 g

4 0

3 years ago

Sometimes you are given a measured amount of two or more reactants and asked how much product can be formed. Explain what steps

Westkost [7]

Explanation:

To solve this problem, follow these steps;

Obtain a balanced equation of the reaction and familiarize with the reactants and products.
Find the number of moles of the reacting species since they are the known matter in terms of quantity.
From the number of moles, determine the limiting reactant.
The limiting reactant is the one given in short supply.
Such reactant determines the extent of the reaction.
Compare the moles of this specie to that of the products using the balanced equation.
Obtain the mole of the desired product and find the mass or desired quantity.
simply work from the known specie to the unknown

learn more:

Number of moles brainly.com/question/13064292

#learnwithBrainly

4 0

4 years ago

Complete the following equations (note that the equations are not balanced). Use the act

devlian [24]

Answer:

Explanation:

8 0

3 years ago

IS IT TRUE?that the moon collided with a tiny plant made of rubble from earth's collision with another planet that made the moon

Nikolay [14]

That is currently unknown, because we don't have anyone who lived them with that knowledge, but based on some facts of Guessing. I would say yes, because another planet near Earth right, well from what I heard, the asteroid that killed the dinos, had another part recoil back into space, and could have hit another part of the asteroid.

8 0

3 years ago