All categories

3 years ago

An arrangement of chemical formulas and symbols that represent a complete chemical reaction is called

Chemistry

2 answers:

slavikrds [6]3 years ago

4 0

A chemical equation is your answer. Please correct me if I am wrong.

Alex73 [517]3 years ago

4 0

Answer:

a chemical equation

Explanation:

Chemical equation is a representation of chemical reaction in terms of chemical formulas and symbols . The chemical equation has two sides namely the Reactant and the Product . The reactant is the substance combined or reacted to form another. The product is the result or substance gotten after the reaction between the reactant.

A chemical equation must be balanced . The number of atom on both sides (reactant and product) must be the same. Sub-scripted numbers are use to represent the number of actual atom present in the substance. Example H2O . The bold value, 2 is a sub-scripted number and it indicate that hydrogen has two atom in the chemical formula.

Example of chemical equations includes

2Mg + 02 → 2MgO

2H2 + O2 → 2H2O

Hcl + NaOH → Nacl + H2O

Notice the number in front of the chemical formula of the substance, it is used to balance the number of atom on both sides of the equation. The number is called coefficients.

You might be interested in

Identifying polar regions within molecules is a very useful skill for chemists that helps us to think about the strength of inte

Ilia_Sergeevich [38]

bond in the acetic acid molecule is the most polar c. c=o bond
which bond in the methyl amine molecule is the most polar c. n–h bond

4 0

4 years ago

5.00 g of an unknown compound was dissolved in 250.0 mL of water. The unknown compound was found to be a non-electrolyte and the

Zielflug [23.3K]

Answer:

This unknown compound has a molar mass of 33.74g/mole

Explanation:

Step 1: Given data

The formula for the osmotic pressure is:

π = MRT = 14.5 atm

⇒ with M = Concentration of the solution

⇒ with R = gas constant = 0.08206 L atm / mol K

⇒ with T = absolute temperature (in Kelvin) = 298K

Step 2: Calculate concentration

M = π/ RT

M = 14.5 / (0.08206 * 298)

M = 0.593 M this is 0.593 moles per L

Step 3: Calculate number of moles

Since the volume is only 0.250 L, the amount of moles is:

0.593 * 0.250 L = 0.1482 moles

Step 4: Calculate molar mass

The molar mass is : mass / moles

Molar mass of this unknown compund = 5g / 0.1482 moles = 33.74 g/mole

This unknown compound has a molar mass of 33.74g/ mole

4 0

3 years ago

Consider the following specific heats: copper, 0.384 J/g· ◦C; lead, 0.159 J/g· ◦C; water, 4.18 J/g· ◦C; glass, 0.502 J/g· ◦C. Wh

Roman55 [17]

Answer:

The correct answer is

2. Water

Explanation:

The specific heat capacity is the amount of heat required to raise the temperature of a unit mass of a substance by one degree. It is connected to the capacity of the substance to retain heat as well as the rate at which it will cool down or heat up when exposed to a specific amount of heat loss or heat supplied. A substance with a low heat capacity such as iron will cool down or heat up more quicker than a substance with a high heat capacity such as water.

From the list of substances water has the highest heat capacity, (4.18 J/g) as such it will retain heat for the longest period of time.

7 0

3 years ago

Which of the following occurs in cells only produce male and female cells

ziro4ka [17]

Answer:

B is the correct answer I think

5 0

3 years ago

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect? Light is made up of extr

Aliun [14]

The correct answer is

Energy of electrons depends on light’s frequency, not intensity.

As per photoelectric effect, if we incident a light on metal surface it will results into emission of electron from it

if we increase the number of photons the number of electrons will increase however if we increase the frequency the number of photons will not increase

While if we increase frequency the energy of electrons will increase as

Energy of photon = Work function of metal + kinetic energy of electrons

7 0

3 years ago

Read 2 more answers