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3 years ago

Which of the following represents a compound? A) H B) H-3 C)H2O D) O-16

2 answers:

7 0

The answer is C. H2

To be considered as a compound, it need to contain two on more elements.
From the option above, only H2O contains 2 elements, H is for Hydrogen and O is for oxygen. This compound formed a substance that we most commonly know as water.

adelina 88 [10]3 years ago

3 0

C, H2O represents the compound responsible for constituting water.

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In an investigation with density, Marcia’s teacher measures the mass and volume of 10 different samples of a substance. The samp

valina [46]

Answer:

Mass

Step-by-step explanation:

Usually, you plot the independent variable along the horizontal (x) axis and the dependent variable along the vertical (y) axis.

Marcia's teacher plotted the mass of the sample along the x-axis and volume along the y-axis.

The mass is the independent variable, because that is what the teacher varied.

The volume is the dependent variable, because it depends on the mass.

Sample number is wrong, because it is not a variable.

Substance is wrong, because all samples consist of the same substance.

Density is wrong, because it is constant. It is the slope of the graph.

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3 years ago

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why a gas, at constant pressure, increases greatly in volume when it is gently heated but a solid does not

11Alexandr11 [23.1K]

Explanation:

This is because gas particles are free to move as they are not held in place by strong molecular forces while particles in a solid are

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3 years ago

Identify the type of energy involved in each step:

Agata [3.3K]

Radiant energy or electrical energy

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3 years ago

What would the volume of a gas be at 150c if had of volume of 693 ml at 45 c

Vlad1618 [11]

Answer:

Explanation:

T1 = 150°C = (150 + 273.15)K = 423.15K

T2 = 45°C = (45 + 273.15)K = 318K

V1 = 693mL = 693cm³

Applying Charle's law, the volume of a given gas is directly proportional to is temperature provided that pressure remains constant.

V = kT

V1 / T1 = V2 / T2

693 / 423.15 = V2 / 318

V2 = (693 * 318) / 423.15 = 520.79cm³

The new volume of the gas is 520.79cm³

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3 years ago

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Answer:applied chemistry

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