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The final gas pressure : 175.53 atm

Maybe the complete question is like this :

A ridged steel tank filled with 62.7 l of nitrogen gas at 85.0 atm and 19 °C is heated to 330 °C while the volume remains constant. what is the final gas pressure?

The volume remains constant⇒Gay Lussac's Law  

When the volume is not changed, the gas pressure in the tube is proportional to its absolute temperature  

[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

P₁=85 atm

T₁=19+273=292 K

T₂=330+273=603 K

[tex]\tt P_2=\dfrac{P_1\times T_2}{T_1}\\\\P_2=\dfrac{85\times 603}{292}\\\\P_2=175.53~atm[/tex]

The concentration of [OH-]  -hydroxide ion : 1.2 x 10⁺⁴ M

H₂O ionization reaction

2 H₂O ⇌ OH− + H₃O⁺

The water equilibrium constant (Kw) is the product of concentration

the ions:

Kw = [H₃O +] [OH-]

Kw value at 25° C = 10⁻¹⁴

It is known  [H₃O +]=8.4 x 10⁻¹¹ M

then the concentration of [OH-]  -hydroxide ion :

[tex]\tt 10^{-14}=8.4\times 10^{-11}\times [OH^-][/tex]

[tex]\tt [OH^-]=\dfrac{10^{-14}}{8.4\times 10^{-11}}=1.19\times 10^{-4}\approx 1.2\times 10^{-4}[/tex]

Answer:

Oxygen

Explanation:

i REALLY think it is

Answer:

pseudoscience

Explanation:

The term "pseudoscience" can be used to describe a single assertion or claim that is allegedly supported by facts or science but falls apart when put to the test of reason. Here the given sentence is a pseudoscience.

A statement, discovery, or explanatory system that is presented as pseudoscience lacks the objectivity required by the scientific process. Research that is based on dubious ideas, a defective experimental design, or unreliable data can also lead to pseudoscience.

Pseudoscience may be presented in good faith due to incomplete or inaccurate data analysis. However, it is also possible to deliberately apply scientific methods incorrectly in order to instill unjustified confidence in conclusions that would not be supported by a more rigorous approach.

Many pseudosciences, like astrology, are reasonably safe. Others, nevertheless, might be employed to offer "scientific" justification for unethical behaviour.

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Answer:

6.grass

7.xylem

8.oval

9. poor growth of bones and teetn

Answer:a

Explanation:

Answer: The organism generally must have hard parts such as shell, bone, teeth, or wood tissue; the remains must escape destruction after death; and the remains must be buried rapidly to stop decomposition. This does make the fossil record biased because animals with soft bodies are less likely to form fossils.

Explanation:

Answer:

The 2 beakers of water will have different boiling points because the boiling point of water  is a physical property and the property is independent of the amount of water.

Explanation:

Got 100 on my test

Answer:

False

Explanation:

Answer:

false

Explanation:

Answer:

A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.

Answer:

Because of daylight savings

Answer:

because during the summer is when the earth is tilted a certain one. But because in different places they get summer at a different time the earth tilts differently for the places around the world.

Explanation:

Each plant organ (roots, stems, leaves) contains all three tissue types: ... Vascular tissue is made of two specialized conducting tissues: xylem and phloem. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and also plays a role in structural support in the stem

PLEASE MARK ME AS BRAINLIEST

Answer:

The answer is C

Explanation:

If we assume the sum of energy that could be obtained by absolutely transforming a unit of length, m. It is compared to the speed of light in this connection. In this case, the whole mass of the electron becomes force. In this, depending on the relation of Einstein, each electron can generate 510 keV, which is why only the option of "c" is right.

Answer:

wsppp

Explanation:

Answer:

hi.. (:

Explanation:

Answer: Electronegativity difference of F and Cl: 1.0 and is covalent

Explanation:

Answer:

1.0, covalent

Explanation:

Electronegativity difference of N and H:

0.9

covalent

Electronegativity difference of F and Cl:

1.0

covalent

Answer:

Boiling point.

Explanation:

Flammability, reactivity and toxicity are all chemical properties!

Answer:

Following are the solution to this question:

Explanation:

For [tex][(CH_3)_3O]^{+}[/tex]

Please find the attachment.

Calculating the formal charge[tex]= ve^{-} - (nb +\frac{b}{2})[/tex]

[tex]ve^{-} = valence\ electons\\\\nb=non \ bonding \ electrons\\\\b= bonding \ electrons[/tex]

Formal charge on [tex]C \ of \ CH_3 \ \ \ \ (1)[/tex]

[tex]= 4- (0+\frac{8}{2})\\\\= 4- (0+4)\\\\=4-4\\\\=0[/tex]

Similarly, the formal charge on all carbons atoms is = 0

The formal charge on O atom:

[tex]=6-(2+\frac{6}{2})\\\\=6-(2+3)\\\\=6-5\\\\=+1[/tex]

Answer:

Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume.

Explanation:

Hopefully that helped:/

Answer: Density, mass of a unit volume of a material substance. Hope this helps!

Answer:percent composition

Explanation:

Answer: H2O

Explanation: The given balanced chemical reaction is,

This reaction is a reversible reaction.

The rate of forward reaction will be,

The rate of backward reaction will be,

And at equilibrium the rate of reaction is equal to the rate of backward reaction divided by the rate of forward reaction.

Answer:

electrostatic attraction

Explanation:

Electrostatic attraction refers to the electrostatic force of long-range interaction occurring between the attractive electrostatic adsorption in aqueous solution with differently charged particles or uncharged particles.

Answer: Electrostatic attraction.

Explanation:

If you wanted to know the volume of water in a big bottle of soda,  you would use a unit known as liters. Thus, the correct option for this question is 3.

Volume may be defined as the amount of space occupied by a three-dimensional figure as measured in cubic units. It is generally a physical quantity of any object or substance.

As we all know that water is a liquid. So, the volume of liquid is always measured in liters. The density of water is sufficient in order to measure it in liters. While the volume of small quantity measurements like medicinal liquids is measured in milliliters.

Therefore, a liter is a unit in which the volume of water is usually measured. Thus, the correct option for this question is 3.

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Answer:

Both are chemical changes.

Explanation:

They are chemical changes because when when you melt the sugar to make caramel a new substance is formed. The same with cookies. You don't start out with cookies, you start out with dough. And then when you cook the dough a new substance is formed which is the cookies.

Answer:

2 and 4 and 3

Explanation:

in c. leading 0's are never significat. Numbers 1-9 are always significant.

d. leading 0's are never significant. numbers 1-9 are always significant. ending 0's are only significant when there is a decimal.

e. numbers 1-9 are always significant. 0's are not significant because there is no decimal.

Answer:

60 miles

Explanation:

If the car is moving 30 mph, every hour the car has traveled 30 miles. Therefore, if the car travels for two hours, the car has traveled 60 miles if the same speed of 30 mph remained consistent.