3. give reasons(a) A gas fills completely the
vessel in which it is kept.
(b)A gas exerts pressure on the
walls of the container
(c) A wooden table should be
called a solid
(d) We can easily move our hand
in air but to do the same
through a solid block of wood we need a karate
expert
we need a karate expert.

Answers

Answer 1

Answer:

Answer:

A.A gas exerts pressure on the walls of the container. Reason: They have high kinetic energy and negligible force of attraction to move constantly moving with high speed in all directions. ... These collisions of the gas particles with the container walls exert pressure on the walls of the container.

B A gas exerts pressure on the walls of the container due to imapact of its gas molecules with hight velocity .

C.A wooden table should be called a solid. Reason: It has a definite shape and volume. It is very rigid and cannot be compressed, i.e., it has a solid characteristic.

D.We can easily move our hand in air but to do the same through a solid block of wood we need a karate expert. It is because the molecules of air has less force of attraction between them and a very small external force can separate them and pass through it.

Explanation:

Plz mark me as a brainlest

Related Questions

The spontaneous intermingling of atoms among different substances is accomplished by _____.-molecular kinetic energy -diffusion -displacement -condensation
Which atom has the least attraction for the electrons in a bond between that atom and an atom of hydrogen?(1) carbon(2)nitrogen(3)oxygen(4) fluorine
"Each value below represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or?Are the following acidic, basic or nuetral? pOH=3.37 pOH=11.40 [h+]=3.8x10^-4 [h+]=5.8x10^-8 [OH-]=3.5x10^-12 [OH-]=6.6x10^-3 [h+]=1.0x10^-7 pOh=7 pH=5.11 pH=12.94"
How many formula units are there in 0.9876 grams of zinc hydroxide
The temperature T in Kelvin is 273.15 more than temperature C in degrees Celsius. Use your function to find the equivalent temperature in Kelvin for 100*C.

What is the formula for carbon tetrachloride?a. CCl
b. CCl2
c. CCl3
d. CCl4

Answers

The formula for carbon tetrachloride is CCl4. The answer is letetr D. The rest of the choices do not answer the question above.

What elements fill the d orbitals on the periodic table?

Answers

The elements that fill the d orbitals on the periodic table are called transition metals.

According to Hess’s law, if a series of intermediate reactions are combined, the enthalpy change of the overall reaction isthe difference between the enthalpies of the intermediate reactions.
the sum of the enthalpy changes of the intermediate reactions.
the product of the enthalpy changes of the intermediate reactions.
the fraction of the individual enthalpies of the intermediate reactions.

Answers

Answer : The correct option is, the sum of the enthalpy changes of the intermediate reactions.

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

For example :

The formation reaction of CO will be,

$C(graphite)+(1)/(2)O_2(g)\rightarrow CO(g)$ $\Delta H_(formation)$

The intermediate balanced chemical reaction will be,

(1) $C(graphite)+(1)/(2)O_2(g)\rightarrow CO_2(g)$ $\Delta H_1$

(2) $CO+(1)/(2)O_2(g)\rightarrow CO_2(g)$ $\Delta H_2$

The expression for enthalpy of formation of CO is,

$\Delta H_(formation)=[n* \Delta H_1]+[n* \Delta H_2]$

where,

n = number of moles

By adding reaction 1 and reverse reaction of reaction 2, we get the enthalpy of formation of CO.

Hence, the correct option is, the sum of the enthalpy changes of the intermediate reactions.

I think the answer is B. the sum of the enthalpy changes of the intermidiate reactions

What term is being defined below? the total amount of greenhouse gases produced by individuals or other entities in a given time perioda. global warming
b. ozone depletion
c. carbon footprint
d. reef destruction

Answers

The correct answer is C. Carbon footprint is the total amount of greenhouse gases produced by individuals or other entities in a given period of time. It is usually expressed in equivalent tons of carbon dioxide. Greenhouse gases can be emitted through transport, production and consumption of food, fuel, etc.

An antacid tablet containing 0.50 g of NaHCO3 is dissolved in 250 mL of water. What is the molar concentration of NaHCO3 in the solution?

Answers

1 mole of NaHCO3 = 84g

1 mole of NaHCO3--------------84g
x moles of NaHCO3----------0,50g
x = 0,00595 moles of NaHCO3

0,00595 moles of NaHCO3----------in--------250ml
x moles of NaHCO3-------------------in-----------1000ml
x = 0,0238 moles of NaHCO3

answer: the molar concentration of NaHCO3 is 0,0238mol/l

Hello!

An antacid tablet containing 0.50 g of NaHCO3 is dissolved in 250 mL of water. What is the molar concentration of NaHCO3 in the solution ?