All categories

3 years ago

How many protons, neutrons, and electrons are in Potassium, Nitrogen, and oxygen?

1 answer:

3 0

The amount of protons is equal to the number of electrons of a chemical element. The atomic number of an element also determines the number of the protons it contains. The number of protons is also the same number of electrons. Protons are positively charged, electrons are negatively charged. To get the number of neutrons, all you need is to deduct the number of the atomic mass or mass number from the atomic number. Potassium has 19 protons, therefore has 19 electrons as well. The atomic mass of Potassium is 39. So, the number of neutrons Potassium has is 20. Potassium Atomic number: 19 Protons: 19 Electrons: 19 Atomic Mass: 39 Neutron: 20 Nitrogen Atomic number: 7 Protons: 7 Electrons: 7 Atomic Mass: 14.007 Neutrons: 7 Oxygen Atomic Number: 8 Protons: 8 Electrons: 8 Atomic Mass: 15.99 Neutrons: 8

You might be interested in

Yeast converts glucose to ethanol and carbon dioxide during a process known as anaerobic fermentation. The chemical reaction is

Korolek [52]

Answer:

102g

Explanation:

To find the mass of ethanol formed, we first need to ensure that we have a balanced chemical equation. A balanced chemical equation is where the number of atoms of each element is the same on both sides of the equation (reactants and products). This is useful as only when a chemical equation is balanced, we can understand the relationship of the amount (moles) of reactant and products, or to put it simply, their relationship with one another.

In this case, the given equation is already balanced.

$\tex{C_6H_{12}O_6} \longrightarrow 2 \ C_2H_6O + 2 \ CO_2$

From the equation, the amount of ethanol produced is twice the amount of yeast present, or the same amount of carbon dioxide produced. Do note that amount refers to the number of moles here.

Mole= Mass ÷Mr

Mass= Mole ×Mr

Method 1: using the mass of glucose

Mr of glucose

= 6(12) +12(1) +6(16)

= 180

Moles of glucose reacted

= 200 ÷180

= $\frac{10}{9}$ mol

Amount of ethanol formed: moles of glucose reacted= 2: 1

Amount of ethanol

= $2(\frac{10}{9} )$

= $\frac{20}{9}$ mol

Mass of ethanol

= $\frac{20}{9} \times[2(12)+6+16]$

= $\frac{20}{9}(46)$

= 102 g (3 s.f.)

Method 2: using mass of carbon dioxide produced

Mole of carbon dioxide produced

= 97.7 ÷[12 +2(16)]

= 97.7 ÷44

= $\frac{977}{440}$ mol

Moles of ethanol: moles of carbon dioxide= 1: 1

Moles of ethanol formed= $\frac{977}{440}$ mol

Mass of ethanol formed

= $\frac{977}{440} \times[2(12)+6+16]$

= 102 g (3 s.f.)

Thus, 102 g of ethanol are formed.

Additional:

For a similar question on mass and mole ratio, do check out the following!

brainly.com/question/1685725

8 0

2 years ago

How many moles are in iron

Natalka [10]

Mole weighs about 55.845 g. One mole of any element equals it's atomic mass in grams.. idfk if this helps but hope it does lol

8 0

4 years ago

34. 3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The solution's temperature increases

Digiron [165]

Answer:

ΔH = 2.68kJ/mol

Explanation:

The ΔH of dissolution of a reaction is defined as the heat produced per mole of reaction. We have 3.15 moles of the solid, to find the heat produced we need to use the equation:

q = m*S*ΔT

Where q is heat of reaction in J,

m is the mass of the solution in g,

S is specific heat of the solution = 4.184J/g°C

ΔT is change in temperature = 11.21°C

The mass of the solution is obtained from the volume and the density as follows:

150.0mL * (1.20g/mL) = 180.0g

Replacing:

q = 180.0g*4.184J/g°C*11.21°C

q = 8442J

q = 8.44kJ when 3.15 moles of the solid react.

The ΔH of the reaction is:

8.44kJ/3.15 mol

= 2.68kJ/mol

5 0

3 years ago

True or false when heat is added to atoms the molecules vibrate much more slowly

Temka [501]

Answer:

false

Explanation:

The particles are held together too strongly to allow movement from place to place but the particles do vibrate about their position in the structure. With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly

8 0

2 years ago

PLEASE HELP BRAONLIST ANSWER

dem82 [27]

Explanation:

decrease since the photons have to travel through a cloudier substance

6 0

2 years ago