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3 years ago

Describe one major change that occured in the modern atomic model

1 answer:

7 0

the modern atomic model shows that electrons are located in a predicted area but cannot be identified in a specific point

Hope this helps :)

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__________ enable humans to see and detect the color of different objects.

CaHeK987 [17]

The human eye is able to see images and colors because of the specialized photoreceptor cells in the retina called rods and cones.

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2 years ago

Read 2 more answers

Builders and dentists must store plaster of Paris,

eimsori [14]

Answer:

547 L of water vapour

Explanation:

Equation of reaction: 2[CaSO4.2H20] + Heat ---> 2[CaSO4.½H2O] + 3H20

From the equation of reaction above, 2 moles of gypsum when heated produces 2 moles of plaster of Paris and 3 moles of water vapour.

Molar mass of gypsum = 172 g/mol

Molar mass of H2O = 18 g/mol

Therefore, 2 * 172 g of gypsum produces 3 * 18 g of water vapour

i.e. 344 g of gypsum produces 54 g of H2O

2 Kg(2000 g) of gypsum will produce (54 * 2000)/344 g of water vapour = 313.95 of water vapour.

Volume of water vapour produced = mass/density

Volume of water vapour = 313.95 g/ 0.574 g/L = 547 L of water vapour

Therefore 547 L of water vapour are produced

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2 years ago

SELECT ALL THAT APPLY

Scilla [17]

At STP conditions, 0.25 moles of CO2(g), H2(g), NH3(g)

The answers are:
<span>1. Will contain the same number of molecules </span>
3. Will occupy the same volume

3 0

3 years ago

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The exact position of the electrons of an atom cannot be determined because they are in constant ___

PSYCHO15rus [73]

Movement
i’m pretty sure-

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2 years ago

A sealed container can hold

svp [43]

0.216 moles of gas can the container hold if a sealed container can hold 0.325 L of gas at 1.00 atm and 293 K.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

R = gas constant = 0.08206 L.atm / mol K

T = temperature, Kelvin

V=5 L

P = 1.05 atm

T = 296 K

Putting value in the given equation:

$\frac{PV}{RT}=n$

$n= \frac{1.05 atm\; X \;5 L}{ 0.08206 L.atm / mol K X 296 K}$

Moles = 0.216 moles

Hence, 0.216 moles of gas can the container hold if a sealed container can hold 0.325 L of gas at 1.00 atm and 293 K.

Learn more about the ideal gas here:

brainly.com/question/27691721

#SPJ1

6 0

2 years ago