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2 years ago

All atoms of the same element have the same:

Chemistry

2 answers:

Korvikt [17]2 years ago

8 0

They have the same number of protons

avanturin [10]2 years ago

6 0

Answer:

Number of protons

Explanation:

The number of protons (the atomic number) determines the identity of the element.

The number of neutrons may differ, in which case the mass and the mass number (number of protons + neutrons) will differ, but all atoms of the same element will have the same number of protons.

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Ferris & Mona used the ORP sensor to titrate a ferrous ammonium sulfate solution, (NH4)2Fe(SO4)2 with KMnO4 titrant.

DIA [1.3K]

Answer:

The correct option is: A. 0.168 M

Explanation:

Chemical reaction involved:

5 Fe²⁺ (aq) + MnO₄⁻ (aq) + 8 H⁺ (aq) → 5 Fe³⁺ (aq) + Mn²⁺ (aq) + 4 H₂O

Given: For MnO₄⁻ solution-

Number of moles: n₁ = 1, Volume: V₁ = 20.2 mL, Concentration: M₁ = 0.0250 M;

For Fe²⁺ solution:

Number of moles: n₂ = 5, Volume: V₂ = 15 mL, Concentration: M₂ = ?M

To find out the concentration of Fe²⁺ solution (M₂), we use the equation:

$\frac{M_{1}\times V_{1}}{n_{1}} = \frac{M_{2}\times V_{2}}{n_{2}}$

$\frac{0.0250 M\times 20.2 mL}{1} = \frac{M_{2}\times 15 mL}{5}$

$0.505 = M_{2}\times 3$

$M_{2} = \frac{0.505}{3} = 0.168M$

Therefore, the concentration or molarity of Fe²⁺ solution: M₂ = 0.168 M

8 0

3 years ago

Using what you have learned about magnetic forces, potential and kinetic energy. Describe the changes

weeeeeb [17]

Answer:

reversible reaction or covalent bonds

7 0

2 years ago

How does the emission spectrum support the idea of quantized energy levels

ryzh [129]

Explanation:

Different atoms absorb and emit specific wavelengths of electromagnetic radiation and nothing in between. These absorption and emission spectra are actually used to identify atoms of elements in a substance. This phenomenon is explained by Bohr's theory of quantized energy levels in an atom – called orbital levels. When an electron 'jumps' from a lower to higher orbital level, it absorbs a specific wavelength of electromagnetic radiation specific to the ‘jump’. Vice versa, when an electron 'jumps' to a lower orbital level is emits an equivalent and specific wavelength of electromagnetic radiation.

Learn More:

For more on emission spectra check out;

brainly.com/question/12472637

brainly.com/question/8788867

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2 years ago

The velocity (speed) of an object was determined to be 45 miles per

Ahat [919]

Answer: 72.58 km/hr

Explanation:

$\frac{45 miles}{1 hour}$ × $\frac{1 km}{0.62 miles}$ = 72.58 km/hr

4 0

2 years ago

Read 2 more answers

How does changing the concentration of the reactants change the parts of a rate law? It changes the rate, R. It changes the rate

Sidana [21]

Answer

A. It changes the rate, R

Explanation

When we change the concentration of the reactants in a chemical reaction, it affects the rate of reaction that happens in the process. Typically, the rate of reaction will decrease with time if the concentration of the reactants decreases because the reactants will be converted to products. Similarly, the rate of reaction will increase when the concentration of reactants are increased.

4 0

2 years ago