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3 years ago

9

Consider a sample of oxygen gas at 27 went a volume of 9.55L at a pressure of 2.97 atm. The pressure is changed to 8.25 atm and

the gas is heated to 125. WHAtS the new volume

2 answers:

cupoosta [38]3 years ago

8 0

The new volume would be 4.62 L. Sorry if I'm wrong.

musickatia [10]3 years ago

8 0

Answer:

4.56 liters

Explanation:

that's the quizziz answer

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What type of energy does most energy end up as

valentinak56 [21]

Answer:

The energy associated with motion ends up as kinetic energy . The energy associated with position ends up as potential energy .

Explanation:

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3 years ago

Which of these substances i) jello ii) the liquid called tea iii) distilled water is a mixture?

11111nata11111 [884]

The answer is ii) the liquid called tea.

That is ii) the liquid called tea is a mixture.

the liquid called tea is a homogeneous mixture that contains organic and inorganic compounds, sugar(organic carbohydrate),tea leaf extract(organic), water(inorganic).

Whereas (iii) distilled water, is a pure substance while (I) gello is a colloid.

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3 years ago

Oceans have major effects on Earth's climate in part because they _____.

Gnesinka [82]

The world's oceans are crucial to heating the planet.

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3 0

3 years ago

How many atoms are in 1.4 moles of H3PO4?

sdas [7]

<h3>Answer:</h3>

8.4 × 10²³ atoms H₃PO₄

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Moles
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 1.4 moles H₃PO₄

[Solve] atoms H₃PO₄

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 1.4 \ mol \ H_3PO_4(\frac{6.022 \cdot 10^{23} \ atoms \ H_3PO_4}{1 \ mol \ H_3PO_4})$
[DA] Multiply [Cancel out units]: $\displaystyle 8.4308 \cdot 10^{23} \ atoms \ H_3PO_4$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

8.4308 × 10²³ atoms H₃PO₄ ≈ 8.4 × 10²³ atoms H₃PO₄

3 0

3 years ago

A sample of iron (fe) with a mass of 200.0 g releases 9,840 cal when it freezes at its freezing point. what is the molar heat of

Lostsunrise [7]

The molar heat of fusion for iron with a mass of 200.0g releases 9,840 cal when it freezes at its freezing point is 2,747.7 cal/mol.

<h3>How to calculate molar heat of fusion?</h3>

The heat of fusion of a substance can be calculated by using the following formula:

Q = m∆H

Where:

Q = quantity of heat
m = mass
∆H = change in temperature of fusion

However, the quantity of heat has been given as 9840calories. The molar heat of fusion of iron can be calculated by dividing the heat of fusion by the number of moles of iron.

Moles of iron = mass ÷ molar mass

moles = 200g ÷ 55.8g/mol

moles = 3.58moles

molar heat of fusion = 9840 cal ÷ 3.58mol

molar heat of fusion = 2748.6 cal/mol

Therefore, the molar heat of fusion for iron with a mass of 200.0g releases 9,840 cal when it freezes at its freezing point is 2,747.7 cal/mol.

Learn more about molar heat of fusion at: brainly.com/question/8263730

5 0

2 years ago

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