_____________ are scientists who study the specific properties of any given potential toxin

She remembered that chemical equations can summarize what happens in a chemical reaction. What is the name of the two parts foun

Degger [83]

Answer:

The name of the two parts found on the left side of the equation is reactants.

Explanation:

Chemical reaction is the way one substance reacts against another. That is, a chemical reaction is that chemical process in which two or more substances, by the action of an energy factor, are converted into other substances. The new substance (s) that are formed usually present a totally different appearance from that of the starting substances.

In a chemical reaction there are the substances that react, that is, the reactants, and the substances produced, called products.

A chemical reaction is represented by a chemical equation. The formulas of the reactants are written on the left, and those of the products on the right, both separated by an arrow indicating the direction of the reaction.

Reactants ⇒ Products

Then, the name of the two parts found on the left side of the equation is reactants.

6 0

3 years ago

At a certain temperature, the equilibrium pressures of NO2 and N2O4 are 1.4 bar and 0.46 bar, respectively. If the volume of the

Butoxors [25]

The partial pressure of NO₂ at equilibrium is 0.70 bar and the partial pressure of N₂O₄, at equilibrium is 0.23 bar.

Let x be the mole fraction of NO₂ and x' be the mole fraction of N₂O₄.

The total pressure according to Dalton's law of partial pressure is the sum of the partial pressures of each gas.

Let P be the total pressure of the gases, P' be the partial pressure of NO₂ = 1.4 bar and P" be the partial pressure of N₂O₄ = 0.46 bar.

So, P = P' + P"

= 1.4 bar + 0.46 bar

= 1.86 bar

Since P' = xP

x = P'/P

= 1.4 bar/1.86 bar

= 0.753

Also, P" = xP

x' = P"/P

= 0.46 bar/1.86 bar

= 0.247

Now, since the volume of the container is doubled at constant temperature, we use Boyle's law to determine the new pressure. P₁.

Boyle's law states that the pressure of a given mass of gas is inversely proportional to its volume provided the temperature remains constant. It is written mathematicaly as PV = constant

So, PV = P₁V₁

P₁ = (V/V₁)P

Since V/V₁ = 1/2

P₁ = (V/V₁)P

P₁ = P/2

P₁ = 1.86/2 bar

P₁ = 0.93 bar

So, the new partial pressure of NO₂, P₂ = xP₁

= 0.753 × 0.93 bar

= 0.70 bar

The new partial pressure of N₂O₄, P₃ = x'P₁

= 0.247 × 0.93 bar

= 0.23 bar

So, the partial pressure of NO₂ at equilibrium is 0.70 bar and the partial pressure of N₂O₄, at equilibrium is 0.23 bar.

Learn more about partial pressure here:

brainly.com/question/19813237

5 0

3 years ago

Indicate what type, or types of reaction ech of the following represents:

Flura [38]

Answer:

a) Single displacement reaction

b) Decomposition reaction

c) Double displacement reaction

d) Precipitation reaction

Explanation:

(a) $H_2O + C\rightarrow CO + H_2$

In this reaction, oxygen is replaced by C, so it is a type of displacement reaction. Here, only one species is being replaced, therefore, it is a single displacement reaction.

(b) $2KClO_3 \rightarrow 2KCl + 3O_2$

In this reaction, potassium chlorate decomposes to potassium chloride and oxygen, so it is a type of decomposition reaction.

(c) $Al(OH)_3 +2HCl \rightarrow AlCl_3 +3H_2O$

In this reaction, chloride and OH- ions are being replaced. so, it is a type of double decomposition reaction.

(d) $Pb(NO3)_2 + H_2SO_4 \rightarrow HNO_3 +PbSO_4$

In this reaction, $PbSO_4 (s)$ is precipitated, so it is a type of precipitation reaction.

4 0

3 years ago

Calcium has an atomic number of 20 and 2 valence electrons. Oxygen has an atomic number of 8 and 6 valence electrons. Neon has a

Arlecino [84]

Calcium is in group 2 period 4 of periodic table

Oxygen is in group 16 and period 2

neon is in period 2 and group 16.

Explanation:

Valence electron in calcium =2

valence electron in oxygen= 6

valence electron in neon= 8 valence electron.

Calcium is placed in s block group 2 of period 4.

oxygen is placed in period 2 and group 16

Neon is a p block element, placed in period 2 and group 16.

Calcium is a elecropositive element which can share or donates its electrons to for compound, it has oxidation state of +2 and hence placed in group 2

Oxygen is electronegative as it can accept or share 2 electrons to form a bond. It has oxidation of -2.

Example is CaO.

Neon has its outer shell complete it is an inert element which will not share or donate electrons. it has oxidation state of 0

5 0

3 years ago

Photovoltaic cells convert solar energy into electricity. Calculate the wavelength of light (in nm) required for mercury (Φ =7.2

Sholpan [36]

Answer:

275.3 nm is the wavelength of light required for mercury.

Mercury can not be used to generate electricity from the sun because wavelength at which mercury will emit an electron is smaller than 500 nm.

Explanation:

The wavelength of light required for mercury to emit an electron.