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These connect homework questions are for the textbook "Chemistry in Context, Applying Chemistry to Society" 10th edition

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Chemistry Chapter 1 Connect Homework

Frage 1 von 54

1

Which of the following options correctly describes atoms? Select all that apply.

Wähle eine oder mehr der folgenden:

  • An atom is the smallest unit of an element that can exist as a stable, independent entity

  • Atoms are extremely small

  • Compounds contain two or more different types of atoms

  • Atoms are divisible by ordinary chemical processes

  • Elements are made up of several types of atoms

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Frage 2 von 54

1

Which of the following options correctly describe the periodic table? Select all that apply.

Wähle eine oder mehr der folgenden:

  • The horizontal rows in the periodic table are called groups

  • The elements in the periodic table are arranged based on similar chemical properties

  • The periodic table includes compounds as well as elements

  • The periodic table contained the chemical symbols that represent the elements

  • Elements found on the left side of the periodic table are called nonmetals

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Frage 3 von 54

1

What group are Nobel gases apart of?

Wähle eine oder mehr der folgenden:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

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Frage 4 von 54

1

What group are halogens apart of?

Wähle eine oder mehr der folgenden:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

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Frage 5 von 54

1

What group are alkali metas apart of on the periodic table?

Wähle eine oder mehr der folgenden:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

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Frage 6 von 54

1

What group are alkaline earth metals apart of on the periodic table?

Wähle eine oder mehr der folgenden:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

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Frage 7 von 54

1

The number 10,000 can be expressed as 1 x 10^4. This second form is called ______ notation.

Wähle eine der folgenden:

  • Exponent

  • Scientific

  • Factor of 10

  • Condensed

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Frage 8 von 54

1

Which of the following options correctly describes elements and compounds?

Wähle eine oder mehr der folgenden:

  • The substance N2 is an example of a compound

  • There are many more known compounds than elements

  • Elements and compounds are both pure substances

  • A compounds contains two or more different elements

  • A compounds is a mixture

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Frage 9 von 54

1

Express 2.6 x 10^4 in decimal notation

Wähle eine der folgenden:

  • 260,000

  • 260

  • 26,000

  • 26

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Frage 10 von 54

1

The periodic table is organized such that elements with similar ______ properties fall into vertical columns called ________.

Wähle eine der folgenden:

  • Physical; groups

  • Physical; periods

  • Chemical; groups

  • Chemical; periods

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Frage 11 von 54

1

Which of the following statements correctly describes subatomic particles? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Protons are positively charged

  • The mass of an electron is much smaller than the mass of a proton

  • A neutron is much heavier than a proton

  • The electrons are located outside the nucleus of an atom

  • The charge on a neutron is equal but opposite to the charge on a proton

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Frage 12 von 54

1

Fülle die Lücken, um den Text zu vervollständigen.

Elements in Group 17 are called , whereas elements in Group 18 are called gases.

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Frage 13 von 54

1

Which of the following statements correctly describe the atomic number of an element? Select all that apply.

Wähle eine oder mehr der folgenden:

  • The atomic number of an element varies depending on the number of electrons present

  • The atomic number is equal to the number of protons in the nucleus

  • The atomic number equals the number of neutrons present in the atom

  • Each element has its own unique atomic number

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Frage 14 von 54

1

Fülle die Lücke, um den Text zu vervollständigen

Scientific notation expresses a quantity with a single digit before the decimal point and followed by raised to the appropriate power.

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Frage 15 von 54

1

Express the quantity 0.0000000000835 correctly in scientific notation.

Wähle eine der folgenden:

  • 8.35 x 10^11

  • 8.35 x 10^-11

  • 8.35 x 10^10

  • 8.35 x 10^-10

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Frage 16 von 54

1

Which of the following are allotropes of oxygen?

Wähle eine oder mehr der folgenden:

  • O2

  • O3

  • CaO

  • CO2

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Frage 17 von 54

1

Each element has a unique number of ___________, which is called the atomic number. For a neutral atom, this number is also equal to the number of ___________ present.

Wähle eine oder mehr der folgenden:

  • neutrons; protons

  • Electrons; protons

  • Protons; neutrons

  • Protons; electrons

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Frage 18 von 54

1

Most elements occur in nature as _____________.

Wähle eine der folgenden:

  • Single atoms

  • Diatomic molecules

  • Compounds

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Frage 19 von 54

1

Minerals are _____________________.

Wähle eine der folgenden:

  • Chemical compounds found in rocks and soil

  • Complex mixtures of metallic compounds

  • Diatomic molecules like N2

  • Elemental forms of metal found in the earth

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Frage 20 von 54

1

Different forms of the same element (such as O2 and O3) are called ___________. These forms differ in the way atoms are bonded together.

Wähle eine der folgenden:

  • Allotropes

  • Isotopes

  • Isotropes

  • Isomers

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Frage 21 von 54

1

Which of the following are common types of minerals found in rocks and soil? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Carbides

  • Nitrides

  • Oxides

  • Silicates

  • Aluminates

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Frage 22 von 54

1

Which of the following options correctly describes the form(s) in which elements exist in nature? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Nonmetals such as oxygen and nitrogen may occur either in elemental form in the form of compounds

  • Most metals can be mined from the earth in their pure, elemental states

  • Many metals exist as compounds of oxygen, or oxides.

  • Most elements exist as diatomic molecules such as O2

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Frage 23 von 54

1

The composition of a mixture may be expressed as a percentage. Percent means parts per

Wähle eine der folgenden:

  • Hundred

  • BIllion

  • Thousand

  • Million

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Frage 24 von 54

1

Solid compounds of metals found in rocks and soil are called ________.

Wähle eine der folgenden:

  • Allotropes

  • Mineral

  • Ores

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Frage 25 von 54

1

Which of the following are examples of chemical change? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Rusting of iron

  • Boiling water

  • Cutting aluminum foil

  • Burning a candle

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Frage 26 von 54

1

Fülle die Lücken, um den Text zu vervollständigen.

Many metals occur as minerals in rocks and soil. A mineral in which a metal is bonded to oxygen is called an . whereas a mineral containing oxygen and silicon together is called an .

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Frage 27 von 54

1

Silicon is a key component of electronic devices. This element is an ___________, a type of element also called an ____________.

Wähle eine der folgenden:

  • Metalloid; nonconductor

  • Metal; semiconductor

  • Nonmetal; nonconductor

  • Metalloid; semiconductor

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Frage 28 von 54

1

If a mixture of quartz and bauxite contains 78% quartz, this means that ________. (Select all that apply).

Wähle eine oder mehr der folgenden:

  • 200 g of this mixture contains 22g of bauxite

  • There are 78g of quartz for every 100g of bauxite

  • There are 78g of quartz for every 22g of bauxite

  • 150g of this mixture contain 117g of quartz

  • There are 78g of quartz in 100g of the mixture

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Frage 29 von 54

1

Which of the following are physical changes? (Select all that apply.)

Wähle eine oder mehr der folgenden:

  • Tarnishing of silver

  • Melting ice

  • Breaking a bottle

  • Burning gasoline

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Frage 30 von 54

1

Which metalloid is a key component of electronic devices?

Wähle eine der folgenden:

  • Chromium

  • Iron

  • Sodium

  • Silver

  • Silicon

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Frage 31 von 54

1

Silica is a naturally occurring oxide of silicon, SiO2, which is transparent. Pure crystalized SiO2 is known as ___________.

Wähle eine der folgenden:

  • Sapphire

  • Diamond

  • Glass

  • Quartz

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Frage 32 von 54

1

Crystal is a solid that is ________________________________________________.

Wähle eine der folgenden:

  • Disordered/random arrangement of constituent particles

  • Highly ordered arrangement of constituent particles

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Frage 33 von 54

1

Amorphous solids are _________________________________.

Wähle eine der folgenden:

  • Highly ordered arrangement of constituent particles

  • Disordered/random arrangement of constituent particles

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Frage 34 von 54

1

1 ppm is _____ times smaller than 1%

Wähle eine der folgenden:

  • 1000

  • 100,000

  • 10,000

  • 1,000,000

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Frage 35 von 54

1

Silica glass is made by ________________.

Wähle eine der folgenden:

  • Heating sand with acid to break the highly ordered structure so that it can harden and form glass when cooled

  • Heating sand to a temperature high enough to melt it and then cooling the liquid until it hardens

  • Heating graphite (carbon) at high temperature under high pressure

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Frage 36 von 54

1

Which of the following options correctly describe silica? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Quartz is a form of silica

  • Silica is naturally occurring substance

  • Pure silica is a highly colored substance

  • Silica is a form of pure, elemental silicon

  • Silica has a well-ordered structure composed of repeating linkages between Si and O

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Frage 37 von 54

1

A solid that has a highly ordered structure at the atomic level is referred to an an ___________, whereas solids with a relatively disordered structure are described as ________________.

Wähle eine der folgenden:

  • Glass; entropic

  • Glass; amorphous

  • Crystal; entropic

  • Crystal; amorphous

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Frage 38 von 54

1

Fülle die Lücke, um den Text zu vervollständigen

glass is strengthened glass that has been heated to high temperatures and cooled, which results in internal stresses.

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Frage 39 von 54

1

Which of the following elements are commonly added to sand when making glass, to improve thermal properties? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Potassium

  • Chromium

  • Aluminum

  • Baron

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Frage 40 von 54

1

An approach to analyzing the life cycle of an item, beginning with the raw materials from which it is made to its ultimate disposal, is called the ___________ approach.

Wähle eine der folgenden:

  • Cradle-to-grave

  • Production/disposal

  • Recycling

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Frage 41 von 54

1

Fülle die Lücke, um den Text zu vervollständigen

The process of quickly cooling molten glass has the effect of the material.

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Frage 42 von 54

1

An approach to consumer goods that aims at recycling, so that the end of the life cycle of one item loads naturally into the beginning of the life cycle of another, is the __________ approach.

Wähle eine der folgenden:

  • Cradle-to-grave

  • Recycling

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Frage 43 von 54

1

The conversion of sand into high-purity silicon for computer chip fabrication would fall under which life cycle analysis for a laptop computer?

Wähle eine der folgenden:

  • Material extraction and processing

  • Laptop fabrication

  • Use by consumers

  • Recycling and/or disposal

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Frage 44 von 54

1

What are the environmental challenges to extracting metals from recycled electronic devices? Select all that apply.

Wähle eine oder mehr der folgenden:

  • The solvents used to remove the plastics are not generally environmentally friendly

  • Contaminated groundwater could contribute to an increase of cancers in surrounding communities

  • The process is very costly in energy, more so than mining the metals from the ground

  • Groundwater could be contaminated with heavy metals

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Frage 45 von 54

1

Which if the following form the focus of the cradle to grave approach to consumer goods? Select all that apply.

Wähle eine oder mehr der folgenden:

  • The waste products created when the goods are made

  • Products that can be made from the goods

  • The raw materials from which the goods are made

  • The energy consumed to produce the goods

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Frage 46 von 54

1

A "cradle-to-grave" approach to analysis of the life cycle of an item includes that ideas that ________________.

Wähle eine der folgenden:

  • The end of the life cycle of one item leads naturally into the beginning of the life cycle of another

  • The end of the life cycle of an item can be defined precisely

  • The life cycle of an item should be described in detail from its manufacture to its disposal

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Frage 47 von 54

1

Which of the following are essential parts of life cycle analysis? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Marketing expenses

  • Use by consumers

  • Research and development

  • Recycling and disposal

  • Fabrication

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Frage 48 von 54

1

When an electronic device is recycled, the metals are recovered by ____________.

Wähle eine der folgenden:

  • Boiling in solvents

  • Treatment with strong acid

  • Crushing the circuit boards and then filtering out the metals

  • Physically picking them out with forceps

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Frage 49 von 54

1

Which of the following are elements? Select all that apply.

Wähle eine oder mehr der folgenden:

  • CaCo3

  • O2

  • NaCl

  • Cu

  • Na

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Frage 50 von 54

1

Which of the following are examples of mixtures? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Nitrogen gas

  • Argon

  • Carbon dioxide

  • Tap water

  • Soil

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Frage 51 von 54

1

Chemistry is the study of _______________. Select all the options that correctly complete the sentence.

Wähle eine oder mehr der folgenden:

  • The properties of substances

  • The interaction of living systems

  • The changes of matter

  • Matter and its composition

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Frage 52 von 54

1

Which of the following are pure substances? Select all that apply.

Wähle eine oder mehr der folgenden:

  • H2O

  • N2

  • Salt water

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Frage 53 von 54

1

A molecule is an independent structure composed of two or more _____________ chemically bonded together.

Wähle eine der folgenden:

  • Atoms

  • Compounds

  • Elements

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Frage 54 von 54

1

Which of the following elements commonly occur as diatomic molecules? Select all that apply.

Wähle eine oder mehr der folgenden:

  • Fluorine

  • Hydrogen

  • Nitrogen

  • Oxygen

  • Neon

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