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2 years ago

The nucleus of an element contains more protons then electrons.this is referred to a?

Chemistry

1 answer:

dedylja [7]2 years ago

3 0

Answer:

ion

However atoms may gain or lose electrons in ordinary chemical reactions. If an atom has the same number of electrons as protons, it is a neutral atom. If it has a net charge, (more or less electrons than protons) it is an ion. If it has more electrons than protons it has a net negative charge and is known as an anion.

Explanation:

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Convert -12.00 degrees Celsius to the unit Kelvin. 296.15 K 261.15 K -285.15 K -162.85 K

Gre4nikov [31]

To convert Celsius to kelvin, we need to know the formula. Kelvin = Celsius + 273.15. Now, we can figure out how many degrees kelvin -12 degrees Celsius is.

Kelvin = -12 + 273.15

Kelvin = 261.15

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3 years ago

What is a risk of using Biomass?

o-na [289]

It can cause stomach aches and headaches

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2 years ago

How to identify coplanar molecule?

lozanna [386]

See if the carbon atoms are SP2 or Sp they the coplanirty is more and if its Sp3 hybridization it cant be in coplanar as Sp3 is having Td shape where as sp2 and sp are not :)

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3 years ago

Elements in the same column of the periodic table have what in common?

Kipish [7]

Answer:

Elements in same column of periodic table have same properties.

Explanation:

The elements in the same group have same number of valance electrons thus have similar properties.

Consider the elements of group two i.e alkaline earth metals. All have two valance electrons and show similar properties.

Magnesium, barium, calcium etc.

All alkaline earth metals form salt with halogens.e.g,

Mg + Cl₂ → MgCl₂

Ba + Br₂ → BaBr₂

Mg + Br₂ → MgBr₂

Ca + Br₂ → CaBr₂

They react with oxygen and form oxides of respective metal.

2Mg + O₂ → 2MgO

2Ba + O₂ → 2BaO

2Ca + O₂ → 2CaO

these oxides form hydroxide when react with water,

MgO + H₂O → Mg(OH)₂

BaO + H₂O → Ba(OH)₂

CaO + H₂O → Ca(OH)₂

With nitrogen it produced nitride,

3Mg + N₂ → Mg₃N₂

3Ba + N₂ → Ba₃N₂

3Ca + N₂ → Ca₃N₂

With acid like HCl,

Mg + 2HCl → MgCl₂ + H₂

Ba + 2HCl → BaCl₂ + H₂

Ca + 2HCl → CaCl₂ + H₂

8 0

3 years ago

For the following reaction, 7.53 grams of benzene (C6H6) are allowed to react with 8.33 grams of oxygen gas. benzene (C6H6) (l)

juin [17]

Answer:

The maximum amount of CO2 that can be formed is 9.15 grams CO2

O2 is the limiting reactant

There will remain 4.82 grams of benzene

Explanation:

Step 1: Data given

Mass of benzene = 7.53 grams

Mass of oxygen gas = 8.33 grams

Molar mass of benzene = 78.11 g/mol

Molar mass oxygen gas = 32.00 g/mol

Step 2: The balanced equation

2C6H6 + 15O2 → 12CO2 + 6H2O

Step 3: Calculate moles

Moles = mass / molar mass

Moles C6H6 = 7.53 grams / 78.11 g/mol

Moles C6H6 = 0.0964 moles

Moles O2 = 8.33 grams / 32.00 g/mol

Moles O2 = 0.2603 moles

Step 4: Calculate the limiting reactant

For 2 moles benzene we need 15 moles O2 to produce 12 moles CO2 and 6 moles H2O

O2 is the limiting reactant. It will completely be consumed ( 0.2603 moles). Benzene is in excess. there will react 2/15 * 0.2603 = 0.0347 moles

There will remain 0.0964 - 0.0347 = 0.0617 moles benzene

This is 0.0617 moles * 78.11 g/mol = 4.82 grams benzene

Step 5: Calculate moles CO2

For 2 moles benzene we need 15 moles O2 to produce 12 moles CO2 and 6 moles H2O

For 0.2603 moles O2 we'll have 12/15 * 0.2603 = 0.208 moles CO2

Step 6: Calculate mass CO2

Mass CO2 = moles CO2 * molar mass CO2

Mass CO2 = 0.208 moles * 44.01 g/mol

Mass CO2 = 9.15 grams

4 0

3 years ago