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2 years ago

What is the most important change in a chemical change?

Chemistry

1 answer:

avanturin [10]2 years ago

4 0

5) state
when the state of the chemical changes that is the most important

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Which phrases describe clastic sedimentary rocks? Check all that apply.

Romashka [77]

Explanation:

A clastic sedimentary rock is a rock that is formed from pre-existing rock materials and minerals. This materials have been transported to their new positions by the agents of denudation.

Clastic sedimentary rocks are made up of rock fragments predominantly.
The matrix is usually remnants of other rocks.
A cementing material can form between clasts and holds them in place. Cements are usually iron oxides, calcite e.t.c.
These rock types are usually formed from mechanincal weathering of rocks
Mechanical weathering breaks down rocks into chunks.
Examples are breccia, conglomerates, e.t.c.

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2 years ago

What are the effects of inhalation of acetone vapor?

Ipatiy [6.2K]

Answer:

it can cause irritation in eyes throat and lungs and u can become lightheaded, or possibly fall in a coma

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2 years ago

How many moles of N2 are need to fill a 35 L tank at standard temperature and pressure?

Tems11 [23]

1.56 moles of N2 are needed to fill a 35 L tank at standard temperature and pressure. Details about moles can be found below.

<h3>How to calculate number of moles?</h3>

The number of moles of a substance can be calculated using the following formula:

PV = nRT

Where;

P = pressure
V = volume
n = number of moles
R = gas law constant
T = temperature

At STP;

T = 273K
P = 1 atm
R = 0.0821 Latm/molK

1 × 35 = n × 0.0821 × 273

35 = 22.41n

n = 35/22.41

n = 1.56mol

Therefore, 1.56 moles of N2 are needed to fill a 35 L tank at standard temperature and pressure.

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1 year ago

The rate of evaporation is affected by all of the following except

lidiya [134]

Hello there.

<span>The rate of evaporation is affected by all of the following except

Answer: </span><span>B. the humidity.
</span>

8 0

3 years ago

Read 2 more answers

The density of an unknown gas is 4. 20 grams per liter at 3. 00 atmospheres pressure and 127 °c. what is the molecular weight of

Kryger [21]

The molecular weight of this gas will be 45 g/mol .

The state equilibrium equation for a fictitious perfect gas is known as the ideal gas law, sometimes known as the generic gas equation. Although it has significant drawbacks, it represents a decent approximation of the activity of many gases under various conditions.

Ideal gas law can be expressed as:

PV =nRT

Calculation of molecular weight by using ideal as law.

Given data:

P = 3 atm

T = 127 °c

Density = 4. 20 grams per liter

PV =nRT

where p is pressure , T is temperature and R is gas constant.

PV = gram / molecular weight RT

Molecular weight = (g/v)( 1/P) RT

Putting the given data in above equation.

Molecular weight =4.20 × 1/ 3× 400 × 0.0831

Molecular weight = 45 g/mol.

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1 year ago