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Andrei [34K]
3 years ago
6

A neutral atom of sodium has 11 protons. Use this information explain the total number of electrons that are in sodium

Chemistry
2 answers:
m_a_m_a [10]3 years ago
6 0

Answer:

Electrons and protons have opposite electric charge. They are present in the same number, but opposite electric charge. ( since the atom is neutral )

Explanation:

if we look at the periodic table we see, for the sodium atom (Na), that the atomic number (Z) is 11. The atomic number is the number of protons. Protons are positive.

Since this sodium atom is neutral, this means that there are the same number of electrons, which are negative. So also 11 electrons.

Electrons and protons have opposite electric charge.

Following the formula A = Z + N

Here is A = atomic mass, and is the sum of protons ( same as electrons ) + neutrons

As we can see on the periodic table the atomic mass of Sodium(Na) is 23

23 = 11 + N  ⇔ N = 23 -11 = 12 neutrons

baherus [9]3 years ago
3 0

Answer: 11 Electrons

Explanation: This is because a neutral atom has the same number of protons and electrons.

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Which is true when a reaction has reached equalibrium
Serggg [28]
The answer should be: <span>D. The reaction rate is equal in both directions

In the equilibrium state, the rate of reaction to the right is same as the reaction to the left. Because of this, the concentration of the reactant and product will be kept same.
It might seem like the reaction is stopped because there is no change in the concentration, but it wasn't.  Adding a reactant or product will break the equilibrium state.</span>
7 0
4 years ago
A fusion reaction always creates which of the following?
ICE Princess25 [194]

A fusion reaction can be regarded as the type of reaction that occurs where two lighter elements come together in a type of reaction giving rise to a heavier/more massive element.

A fusion reaction always creates a more massive atomic nucleus (option c).

When the two lighter nuclei comes together in a reaction, a more heavier/massive nucleus is formed but its mass will still be less than the combined mass of the two reactant nuclei.

This also indicates that the left over mass may have been released as energy.

Learn more: brainly.com/question/18175586

6 0
3 years ago
SHOW YOUR WORK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
WARRIOR [948]

Answer:

1.375%

Explanation:

Percent Error = measured value - accepted value/ accepted value x 100

Measured Value: 15.78

Accepted Value: 16.00

Work:

\frac{15.78-16.00}{16.00} * 100

\frac{-.22}{16} * 100 = -1.375

You cannot have a negative percentage. Therefore the answer is 1.375%

4 0
3 years ago
A 0.211 g sample of carbon dioxide, CO2, has a volume of 560 mL and a pressure of 429 mmHg whats the temperature of the gas in K
SCORPION-xisa [38]

The temperature of the gas sample is 813 K.

<u>Explanation:</u>

We have to use the ideal gas equation to find the temperature of the gas sample.

The ideal gas equation is PV = nRT

Pressure, P = 429 mm Hg = 0.56 atm

Volume, V = 560 mL = 0.56 L

R = gas constant = 0.08205 L atm mol⁻¹K⁻¹

Mass = 0.211 g

Molar mass of carbon di oxide = 44.01 g / mol

Moles, n = $\frac{given mass}{molar mass} = \frac{0.211 g}{44.01 g/mol}

              = 0.0047 mol

Now, we have to plugin the above values in the above equation, we will get the temperature as,

$T= \frac{PV}{nR}

T = $\frac{0.56  \times 0.56}{0.08205 \times 0.0047}

 = 813 K

So the temperature of the gas sample is 813 K.

5 0
3 years ago
The standard free energy change in physiological conditions (G') for the reaction catalyzed by malate dehydrogenase in the citri
Papessa [141]

Answer: The actual value of \Delta G is -618 J/mol

Explanation:

Relation of ree energy change and equilibrium constant

\Delta G=\Delta G^0+2.303\times RT\times \log K_{eq}

where,

\Delta G = Free energy change

\Delta G^o = standard free energy change = +29 kJ/mol =

R = universal gas constant

T = temperature = 37^0C=(37+273)K=310K

K_{eq} = equilibrium constant = 1.02\times 10^{-5}

\Delta G=+29000J/mol+2.303\times 8.314J/Kmol\times 310K\times \log (1.02\times 10^{-5})

\Delta G=29000J/mol-29619J/mol=-618J/mol

The actual value of \Delta G is -618 J/mol

7 0
3 years ago
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