Ask question

Ask question

All categories

3 years ago

8

If one atom has 12 protons, 6 neutrons, and 6 electrons. And another one has 12 protons, 7 neutrons, and 8 electrons. Are both a

toms the same element why or why not?

2 answers:

Nataly [62]3 years ago

6 0

No because the second atom has 1 more neutron and 2 more electrons.

Darina [25.2K]3 years ago

5 0

No because the second atom has 1 more neutron

You might be interested in

The dissociation of a/an ________ releases hydrogen ions and increases the concentration of hydrogen ions in a solution.

Crank

Acid...hope it helps

5 0

3 years ago

Calculate the average reaction rate of Cl2 consumed using the following information. H2 + Cl2 yields 2 HCl A table with three co

klemol [59]

Answer : Option D) 2.50 X $10^{-3}$ Mol/(L s)

Explanation: While calculating the average reaction rate for the given reaction in terms of Cl;

$H_{2} + Cl_{2} ----\ \textgreater \ 2HCl$ .

using the rate equation which is;

$\frac{-1}{1}$ $\frac{delta [Cl]}{delta t}$ =

$\frac{- 0.0875 - 0.0625}{10s - 0s}$ = 2.50 X $10^{-3}$ Mol/(L s)

5 0

3 years ago

500mg of iron(ll) complex ferrous bisglycinate hydrochloride was dissolved in dilute H2SO4 and titrated with 0.0200 mol. dm3 KMn

seropon [69]

Using the stoichiometry of the reaction, we can obtain the molar mass of the complex as 276 g/mol. The number of moles iron II as 0.00181 moles and the mass of iron II as 0.1 g.

<h3>Redox reaction</h3>

A redox reaction is one in which there is loss or gain of electrons. The equation of the reaction is 5Fe2+ + MnO4- + 8H+ - - > 5Fe2+ + Mn2+ +4H2O

Number of moles of permanganate = 0.0200 mol. dm3 * 18.10cm3/1000 L

= 0.000362 moles

If 5 moles of iron II reacted with 1 mole of permanganate

x moles of iron II reacts with 0.000362 moles of permanganate

x = 5 moles * 0.000362 moles/ 1 mole

= 0.00181 moles of iron II

Recall that;

Number of moles = mass/molar mass

Molar mass of iron II = 56 g/mol

0.00181 moles = x/56 g/mol

x = 0.00181 moles * 56 g/mol = 0.1 g

If 1 mole of the complex contains 1 mole of iron then;

0.00181 moles = 500 * 10^-3/MM

MM= 500 * 10^-3/0.00181 moles

MM = 276 g/mol

Learn more about stoichiometry: brainly.com/question/9743981

8 0

2 years ago

What is the density of a piece of wood that has a mass of 25.0 grams and a volume of 5.0 cm 3 ?

Georgia [21]

Answer:

5.0g/cm^3

Explanation:

Since we have the mass of the wood (25.0g) and the volume of the wood (5.0cm^3), can use the formula for density to answer this question.

Density=mass/density

Density=25.0g/5.0cm^3

Density=5.0g/cm^3

Therefore, the density of the piece of wood is 5.0g/cm^3.

I hope this helps!

7 0

3 years ago

When hydrogenation of two alkenes produce the same alkane, the more stable alkene has the ____________ heat of hydrogenation?

lidiya [134]

Let us define first what heat of hydrogenation means. This is commonly used as a measure of relative stability between two alkenes that result to the same alkane when it undergoes hydrogenation. The criteria is: the <em>smaller </em>the heat of hydrogenation, the more stable the alkene.

6 0

3 years ago