Question 2 of 10

Chemistry

1 answer:

Xelga [282]1 year ago

4 0

The equation MgO + 2HCl → MgCl₂ + H₂O is a balanced equation.

A balanced chemical equation contains equal number of atoms on both sides of the equation.

The equation is MgO + 2HCl → MgCl₂ + H₂O which contains 1 atom of Mg, 2 atoms of chlorine, 2 atoms of chlorine, 1 atom of oxygen on both reactants and products sides.
So the equation is balanced.
An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction.
In other words, both sides of the reaction have equal amounts of mass and charge.
It follows law of conservation of mass.
Mass is neither created nor destroyed rather it can be transferred from one form to another.

Learn more about balanced equation at:

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What would the products of a double-replacement reaction between ca3n2 and al2o3 be?

djyliett [7]

The equation for the reaction between Ca3N2 and Al2O3 wiil be;
Al2O3 + Ca3N2 = 2AIN +3CaO
Thus, the products of the reaction will be Aluminium Nitride and Burnt lime(Calcium oxide). A double displacement reaction, also known as a double replacement reaction or metathesis, is a reaction where two compounds react, and the positive ions and the anions switch places, forming two new compounds or products.

7 0

3 years ago

Gaseous ethane ch3ch3 will react with gaseous oxygen o2 to produce gaseous carbon dioxide co2 and gaseous water h2o . suppose 21

Anna11 [10]

The chemical reaction for this is:

2 C2H6 + 7 O2 => 4 CO2 + 6 H2O

Solving for CO2 with each reactant will give:

21.0 g C2H6 x (1 mol C2H6/30.08 g C2H6) x (6 mol H2O/2 mol C2H6) x (18 g H2O/1 mol H2O) = 37.70 g H2O

110 g O2 x (1 mol O2/32.00 g O2) x (6 mol CO2/7 mol O2) x (18 g H2O/1 mol H2O) = 53.04 g H2O

Since the amount of H2O in C2H6 is lower therefore C2H6 is the limiting reactant and the maximum amount of water is only 38 g H2O (2 significant digits)

ANswer:

38 g water

6 0

4 years ago

The density of copper metal is 8.9 g/mL. What is the volume of 2.5 kg of this metal?

AlekseyPX

Answer:- The volume of copper is 280 mL.

Solution:- Density and mass of copper metal are given and it asks to calculate the volume of it.

Density is directly proportional to mass and inversely proportional to the volume. The density formula is:

$D=\frac{M}{V}$

where D stands for density, M stands for mass and V stands for volume.

Since, the problem asks to calculate the volume, let's rearrange the formula for volume.

$V=\frac{M}{D}$

The given density is 8.9 grams per mL and the mass is 2.5 kg. We need to convert the mass unit from kg to g so that the g unit could be canceled while calculating volume.

The conversion factor is, 1kg = 1000g

$2.5kg(\frac{1000g}{1kg})$