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sattari [20]
3 years ago
9

Significant figure of 75.02

Chemistry
1 answer:
vredina [299]3 years ago
6 0
The correct answer is 4
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Does ice float on water​
Alex17521 [72]
Yes as it is less dense than the liquid water
5 0
3 years ago
Read 2 more answers
noble gases, such as argon and neon, are known for being extremely non-reactive. neon and argon are non-reactive because they
nadezda [96]
They have a complete electronic configuration .their P shell is p6 therefore cannot gain or loose electron.
4 0
3 years ago
Hydrochloric acid has the chemical formula HCl. A certain quantity of hydrochloric acid has 2.39x1024 atoms. How many moles of h
nasty-shy [4]

Answer: 3.97 moles HCl

Explanation: Solution:

2.39x10²⁴ atoms HCl x 1 mole HCl /

6.022x10²³ atoms HCl

= 3.97 moles HCl

8 0
3 years ago
How many atoms are contained in 100.0 g of mercury
Romashka [77]

3.00097 x 10^{23} atoms are contained in 100.0 g of mercury.

<h3>What is moles?</h3>

The mole is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 12 g of carbon-12.”

Number of moles of mercury = \frac{mass}{molar \;mass}

Number of moles of mercury = \frac{100.0 g}{200.59 u}

=  0.4985 moles

Number of moles of mercury = Number of atoms = moles of Hg x 6.02 X 10^{23}

= 0.4985 x 6.02 X 10^{23}

= 3.00097 x 10^{23} atoms.

Hence, 3.00097 x 10^{23} atoms are contained in 100.0 g of mercury.

Learn more about the moles here:

brainly.com/question/26416088

#SPJ1

5 0
2 years ago
Four gases were combined in a gas cylinder with these partial pressures: 3. 5 atm N2, 2. 8 atm O2, 0. 25 atm Ar, and 0. 15 atm H
aksik [14]

The total pressure of the gas has been 11.9 atm.

The partial pressure has been the pressure exerted by the individual gas in the mixture.

According to the Dalton's law of Partial pressure, the pressure of the gas has been the sum of the partial pressure of each gas in the mixture.

<h3 /><h3>Computation for the pressure of gas</h3>

The given gas has partial pressure of Nitrogen, P_{N_2}=3.5\;\rm atm

The partial pressure of Oxygen, P_{O_2}=8\;\rm atm

The partial pressure of Argon, P_{Ar}=0.25\;\rm atm

The partial pressure of Helium, P_{He}=0.15\;\rm atm

The total pressure, (<em>P</em>) of the gas has been given as:

P=P_{N_2}\;+\;P_{O_2}\;+\;P_{Ar}\;+\;P_{He}\\&#10;P=3.5\;+8\;+\;0.25\;+\;0.15\;\text{atm}\\&#10;P=11.9\;\rm atm

The total pressure of the gas has been 11.9 atm.

Learn more about the vapor pressure, here:

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7 0
3 years ago
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