Given the reaction at equilibrium: A(g) +B(g) <-> C(g) +D(g) + heat

As additional A(g) is added to the system at constant temperature, the concentration of B(g)

a

remains the same

b

decrease

c

increases

The concentration of B(g) decrease.

Explanation:

The equilibrium state for a chemical system is characterized by concentrations or partial pressures of reagents and products that remain unchanged over time. Le Chatelier's Principle states that if a system in equilibrium undergoes a change in conditions, it will move to a new position in order to counteract the effect that disturbed it and restore the state of equilibrium.

One of the conditions that can be modified is concentration. When the concentration of one of the substances in an equilibrium system is changed, the equilibrium varies in such a way that it can compensate for this change. When this concentration increases, the system will shift so that it partially uses the added substance. That is, if a reagent is increased, as happens in this casp when A (g) increases, the system will partially consume it, favoring the direct direction of the reaction. In other words, the balance shifts to the right or to the side of the products.

So, the concentration of B(g) decrease.

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.