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harina [27]
4 years ago
9

Why was the term inert gases dropped? Why was the term inert gases dropped? The term "inert" was dropped because hydrogen was ad

dviced to be included to "inert" gases. The term "inert" was dropped because it no longer described all the group 8A elements. The term "inert" was dropped because some organic gases such as methane were named "inert", too, and confusion happened. The term "inert" was dropped because author's rights for the term ended and scientists obtained possibility to change it.
Chemistry
1 answer:
xxMikexx [17]4 years ago
8 0

Answer:

B) The term "inert" was dropped because it no longer described all the group 8A elements.

Explanation:

Inert elements in chemistry simply refers to elements that are chemically inactive and are not expected to form any compounds. this is the general belief for the group 8 elements as they all have complete duplet/octet configurations (and ideally, they ought to be very stable with no tendency to form compounds by participating in the loss and gain of electrons). However the discovery of compounds like xenon tetrafluoride (XeF4) proved this to be wrong.

Again, the reason the term - inert gses was droppedis beacause this term is not strictly accurate because several of them do take part in chemical reactions.

After dropping the term - Inert gases, they are now referred to as noble gases.

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What mass of aluminum at 144 Celsius will increase the temperature of 100 g of water by from 10 C to 15 C?
Andrej [43]

Answer:

m_{Al} = 18.019\,g

Explanation:

There is a heating process between an aluminium piece and water, which is described by the First Law of Thermodynamics:

Q_{Al} = - Q_{w}

m_{Al}\cdot c_{Al}\cdot (T_{o,Al}-T) = m_{w}\cdot c_{w}\cdot (T-T_{o,w})

The mass of the aluminium piece is therefore cleared and known variables are substituted:

m_{Al} = \frac{m_{w}\cdot c_{w}\cdot (T-T_{o,w})}{c_{Al}\cdot (T_{o,Al}-T)}

m_{Al} = \frac{(100\,g)\cdot \left(4.184\,\frac{J}{g\cdot^{\circ}C} \right)\cdot (15^{\circ}C-10^{\circ}C)}{\left(0.900\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot (144^{\circ}C-15^{\circ}C)}

m_{Al} = 18.019\,g

5 0
3 years ago
Why do scientists continue to investigate certain topics like the atom?
Margaret [11]

Answer:

to understand the human life

Explanation:

hope this helps :)

5 0
3 years ago
Read 2 more answers
PLEASE HELP QUICKLY!! Which statement best describes all minerals?
densk [106]

In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure, that occurs naturally in pure form.

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4 0
3 years ago
1 It was found that 4n atoms of metal x
raketka [301]

Answer:

C 108

Explanation:

1 It was found that 4n atoms of metal x

weigh 501.6 g. The relative atomic mass

of X is 209. If n atoms of another metal,

Y, weigh 65.00 g, what is the relative

atomic mass of metal Y?

A 27 B 52 C 108 D 137

if 4n atoms of x weigh 501.6 gm, the n atoms weigh 501.6/4 = 125.4 gms

since the atomic mass is 209, then 6.022 X10^23 atom weigh 209

the ratio of 125.4 to 209 is

125.4/Y =0.6

therefor n is the number of atom in 0.6 moles

if metal Y has the same, number of atoms "n"  and weighs 65 gm

then then the relative atomic mass is

65/0.6 =108

so the answer is

C 108

7 0
2 years ago
What is the volume, in Liters, of 0.765 mol of carbon monoxide gas at STP?
aivan3 [116]

Answer:

The volume at STP of 0,765 moles of carbon monoxide gas is 17, 125 L.

Explanation:

We use the ideal gas formula, with the constant R = 0.082 l atm / K mol. The STP conditions are : 1 atm pressure and 273 K temperature. Solve for the formula, V (volume):

PV=nRT ---> V= (nRT)/P

V= (0,765 mol x0,082 l atm/ K mol x 273 K)/ 1 atm

<em>V= 17, 12529 L</em>

8 0
3 years ago
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