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4 years ago

When the following equation is balanced what is the coefficient for CaCI2? Ca (s) + 2HCI (aq) —> CaCI2 (aq) + H 2(g)

Chemistry

2 answers:

Allisa [31]4 years ago

7 0

Hello!

The coefficients of any chemical compound are located in the front.

We are asked to find the coefficient of CaCl2 when the equation is balanced. Before finding the coefficient, we should determine if the equation is balanced or not.

Right side: 1 Ca, 2 H, 2 Cl

Left side: 1 Ca, 2 H, 2 Cl → This equation is balanced!

Since the compound CaCl2 has no number in from of the compound, the coefficient has to 1.

Therefore, the coefficient for CaCl2 is 1.

artcher [175]4 years ago

3 0

The coefficients of any chemical compound are located in the front.

We are asked to find the coefficient of CaCl2 when the equation is balanced. Before finding the coefficient, we should determine if the equation is balanced or not.

Right side: 1 Ca, 2 H, 2 Cl

Left side: 1 Ca, 2 H, 2 Cl → This equation is balanced!

Since the compound CaCl2 has no number in from of the compound, the coefficient has to 1.

Therefore, the coefficient for CaCl2 is 1.

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What information about a molecule can you determine from its chemical formula?

Ira Lisetskai [31]

Answer:

Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol.

6 0

3 years ago

How much heat, in joules and in calories, must be added to a 75.0Â–g iron block with a specific heat of 0.449 j/g Â°c to increas

lianna [129]

Answer:

$Q=50,849.25J\\\\Q=12,153.3cal$

Explanation:

Hello!

In this case, given the mass, temperature change and specific heat, it is possible to compute the required heat in joules as shown below:

$Q=mC(T_2-T_1)\\\\Q=75.0g*0.449\frac{J}{g\°C}(1535\°C-25\°C)\\\\Q=50,849.25J$

Now, since 1 cal =4.184 J, this result in calories is:

$Q=50,849.25J*\frac{1cal}{4.184J}\\\\Q=12,153.3cal$

Best regards!

7 0

3 years ago

A principal quantum number refers to

jok3333 [9.3K]

this represents the relative overall energy of each orbital, and the energy of each orbital increases as the distance from the nucleus increases

6 0

3 years ago

Read 2 more answers

Lemonade is an example of a compound because the particles retain their original chemical properties and identity.

Ksenya-84 [330]

Answer:

False

Explanation:

Compounds are chemically combined

lemonade is not

If the squeezed lemonade is made by squeezing lemons to extract the juice and mixing it with water and sugar, it would be a homogenous mixture.

If it contains a pulp than it would be heterogeneous

4 0

4 years ago

Initial mass of triphenyl methanol in g = 0.220g Initial volume of 33% HBr solution in ml = 0.60 ml Find mas of triphenyl bromid

tensa zangetsu [6.8K]

Answer:

0.792g of triphenyl bromide are produced.

Explanation:

The reaction of triphenyl methanol with HBr is:

triphenyl methanol + HBr → Triphenyl bromide.

Reaction (1:1), 1 mole of HBr reacts per mole of triphenyl methanol.

To know the mass of triphenyl bromide assuming a theoretical yield (Yield 100%) we need to find first limiting reactant:

Moles triphenyl methanol (Molar mass: 260.33g/mol) =

0.220g × (1mol / 260.33g) = 8.45x10⁻³ moles Triphenyl methanol

Moles HBr (Molar mass: 80.91g/mol; 33%=33g HBr/100mL) =

0.60mL ₓ (33g / 100mL) ₓ (1mol / 80.91g) = 2.45x10⁻³ moles HBr

As amount of moles of HBr is lower than moles of triphenyl methanol, HBr is limiting reactant.

As HBr is limiting reactant, moles produced of triphenyl bromide = moles HBr = 2.45x10⁻³ moles

As molar mass of triphenyl bromide is 323.2g/mol, mass of triphenyl bromide is:

2.45x10⁻³ moles × (323.2g / mol) =

<h3>0.792g of triphenyl bromide are produced.</h3>

5 0

4 years ago