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Chemical Equations
A chemical equation is defined as the short-hand representation of a true chemical reaction with the help of symbols and formula. In this category, there are questions relating chemical equations, symbols and formula.
1,997 Questions
What is the balanced form of the chemical equation shown below Cr(s) plus Cl2(g) CrCl3(s)?
The balanced equation is:
2Cr(s) + 3Cl2(g) → 2CrCl3(s)
Where should coefficients be place when balaning a chemical equation?
Coefficients should be placed in front of the chemical formulas in a chemical equation to balance it. They are used to ensure that the number of atoms of each element is the same on both the reactant and product sides of the equation.
To calculate the mass of sodium chloride produced, first balance the chemical equation for the reaction between sodium oxide and calcium chloride. Next, determine the molar ratio between sodium oxide and sodium chloride in the balanced equation. Finally, use the given mass of sodium oxide and the molar mass of sodium chloride to calculate the mass of sodium chloride produced.
The blank space should be filled with "oxygen." The complete chemical equation for the burning of fossil fuels is fossil fuel + oxygen + carbon dioxide + water + heat.
Write the chemical equation representing the resrstion of ethene from ethanol?
The chemical equation for the conversion of ethanol to ethene is:
C2H5OH -> C2H4 + H2O
Write the chemical equation representing the preparation of ethene from ethanol?
The chemical equation for the preparation of ethene from ethanol is: C2H5OH (ethanol) → C2H4 (ethene) + H2O (water). This reaction is typically carried out at high temperatures in the presence of a catalyst such as sulfuric acid.
What is the balanced chemical equation for the synthesis of sodium bromide from sodium bromine?
2Na + Br2 = 2NaBr
What are state symbols used for in chemical equations?
State symbols in chemical equations indicate the physical state of the reactants and products involved, such as (s) for solid, (l) for liquid, (g) for gas, and (aq) for aqueous solution. They provide crucial information about the conditions under which a chemical reaction occurs, helping to accurately represent the reaction taking place.
Steps for balancing chemical equations?
- Write down the unbalanced chemical equation.
- Count the number of atoms of each element on both sides of the equation.
- Use coefficients to balance the equation by adjusting the number of molecules on either side.
- Ensure that the same number of each type of atom is present on both sides of the equation.
What does the plus sign indicate in a chemical equation?
The plus sign in a chemical equation indicates the presence of more than one reactant or product. It separates individual chemical species on either side of the equation.
On what basis is a chemical equation balanced?
A chemical equation is balanced by ensuring that the number of atoms of each element is the same on both sides of the equation. This is done by adjusting the coefficients in front of the reactants and products to achieve this balance while following the law of conservation of mass.
How many mL of 0.1010 M HCl will be needed to titrate 0.3151 grams of primary standard Na2CO3?
To determine the volume of HCl needed, first calculate the moles of Na2CO3 using its molar mass. Then use the balanced chemical equation to find the moles of HCl required to fully react with the moles of Na2CO3. Finally, use the concentration of the HCl solution to calculate the volume required using the formula: moles = molarity x volume (in liters).
What does the subscript 2 show in this chemical equation?
The subscript 2 in a chemical equation typically indicates that there are two atoms of that element present in the compound or molecule. It represents the stoichiometry of that element within the compound.
What are the spectator ions in Mg(s) plus Zn2 plus plus 2NO3- Mg2 plus plus 2NO3- plus Zn(s)?
The spectator ions are NO3- in this reaction. They are present on both sides of the equation before and after the reaction takes place, so they do not participate in the reaction and can be considered spectators.
Why are chemical equations important?
Chemical equations are important because they show the chemical reactions taking place, including the reactants and products involved. They provide a way to represent and communicate complex chemical reactions in a concise and standardized format. Chemical equations also help in predicting the outcome of reactions and understanding the stoichiometry of the reaction.
Where are the reactants and products found in a chemical equation?
Reactants are found on the left side of a chemical equation, while products are found on the right side. Reactants are the substances that react to form the products in a chemical reaction.
Can anyone help me balance the following chemical equation AgNO3 plus GaCl3 yields AgCl plus GaNO3?
If you are using the formulae as they appear in the question, you will not be able to balance it because the formula of gallium nitrate is wrong. Nine times out of ten this is the problem when you can't balance the equation, so always check. Having said that, I understand that the Answers site won't let you type the correct formula in the question.Here is the unbalanced equation:
AgNO3 + GaCl3 --> AgCl + Ga(NO3)3
As you can see, we need three nitrate groups and we have to place three chloride ions, so we put in the balancing numbers:
3AgNO3 + GaCl3 --> 3AgCl + Ga(NO3)3
and for completeness, especially as this is a precipitation reaction, we add the state symbols:
3AgNO3(aq) + GaCl3(aq) --> 3AgCl(s) + Ga(NO3)3(aq)
Explain how the balancing of chemical equation shows that mass is conserved?
Balancing a chemical equation ensures that the number of atoms of each element on the reactant side is equal to the number on the product side. This conservation of atoms implies the conservation of mass. When the equation is balanced, the total mass of the reactants is equal to the total mass of the products, demonstrating the law of conservation of mass.
Write the balanced chemical reaction between methyl amine (CH3NH2) and hydrobromic acid (HBr)?
The reaction is:
CH3NH2 + HBr = CH3NH3Br
Look at the chemical equation above. The subscript 4 in the reactants indicates that?
There are 4 molecules of that particular reactant involved in the reaction.
The chemical equation for the reaction of iron with oxygen to form rust is 4Fe + 3O2 -> 2Fe2O3.
What is a chemical equation that includes the enthalpy change?
One example of a chemical equation that includes the enthalpy change is the combustion of methane: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ΔH = -802.3 kJ. In this reaction, 802.3 kJ of heat is released as the products are formed.
What are the methods for balancing chemical equation?
The main methods for balancing a chemical equation are inspection, trial and error, and algebraic methods. Inspection involves visually balancing the equation by adjusting the coefficients of the compounds. Trial and error involves systematically changing coefficients until the equation is balanced. Algebraic methods involve setting up and solving a system of linear equations to determine the coefficients.
