Ana silverman
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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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Ana silverman
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Chemistry Chapter 1 Connect Homework

Questão 1 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 2 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 3 de 54

1

What group are Nobel gases apart of?

Selecione uma ou mais das seguintes:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

Explicação

Questão 4 de 54

1

What group are halogens apart of?

Selecione uma ou mais das seguintes:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

Explicação

Questão 5 de 54

1

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

Selecione uma ou mais das seguintes:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

Explicação

Questão 6 de 54

1

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

Selecione uma ou mais das seguintes:

  • Group 1

  • Group 2

  • Group 17

  • Group 18

Explicação

Questão 7 de 54

1

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

Selecione uma das seguintes:

  • Exponent

  • Scientific

  • Factor of 10

  • Condensed

Explicação

Questão 8 de 54

1

Which of the following options correctly describes elements and compounds?

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 9 de 54

1

Express 2.6 x 10^4 in decimal notation

Selecione uma das seguintes:

  • 260,000

  • 260

  • 26,000

  • 26

Explicação

Questão 10 de 54

1

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

Selecione uma das seguintes:

  • Physical; groups

  • Physical; periods

  • Chemical; groups

  • Chemical; periods

Explicação

Questão 11 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 12 de 54

1

Preencha os espaços em branco para completar o texto.

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

Explicação

Questão 13 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 14 de 54

1

Preencha o espaço em branco para completar o texto.

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

Explicação

Questão 15 de 54

1

Express the quantity 0.0000000000835 correctly in scientific notation.

Selecione uma das seguintes:

  • 8.35 x 10^11

  • 8.35 x 10^-11

  • 8.35 x 10^10

  • 8.35 x 10^-10

Explicação

Questão 16 de 54

1

Which of the following are allotropes of oxygen?

Selecione uma ou mais das seguintes:

  • O2

  • O3

  • CaO

  • CO2

Explicação

Questão 17 de 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.

Selecione uma ou mais das seguintes:

  • neutrons; protons

  • Electrons; protons

  • Protons; neutrons

  • Protons; electrons

Explicação

Questão 18 de 54

1

Most elements occur in nature as _____________.

Selecione uma das seguintes:

  • Single atoms

  • Diatomic molecules

  • Compounds

Explicação

Questão 19 de 54

1

Minerals are _____________________.

Selecione uma das seguintes:

  • Chemical compounds found in rocks and soil

  • Complex mixtures of metallic compounds

  • Diatomic molecules like N2

  • Elemental forms of metal found in the earth

Explicação

Questão 20 de 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.

Selecione uma das seguintes:

  • Allotropes

  • Isotopes

  • Isotropes

  • Isomers

Explicação

Questão 21 de 54

1

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

Selecione uma ou mais das seguintes:

  • Carbides

  • Nitrides

  • Oxides

  • Silicates

  • Aluminates

Explicação

Questão 22 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 23 de 54

1

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

Selecione uma das seguintes:

  • Hundred

  • BIllion

  • Thousand

  • Million

Explicação

Questão 24 de 54

1

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

Selecione uma das seguintes:

  • Allotropes

  • Mineral

  • Ores

Explicação

Questão 25 de 54

1

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

Selecione uma ou mais das seguintes:

  • Rusting of iron

  • Boiling water

  • Cutting aluminum foil

  • Burning a candle

Explicação

Questão 26 de 54

1

Preencha os espaços em branco para completar o texto.

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 .

Explicação

Questão 27 de 54

1

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

Selecione uma das seguintes:

  • Metalloid; nonconductor

  • Metal; semiconductor

  • Nonmetal; nonconductor

  • Metalloid; semiconductor

Explicação

Questão 28 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 29 de 54

1

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

Selecione uma ou mais das seguintes:

  • Tarnishing of silver

  • Melting ice

  • Breaking a bottle

  • Burning gasoline

Explicação

Questão 30 de 54

1

Which metalloid is a key component of electronic devices?

Selecione uma das seguintes:

  • Chromium

  • Iron

  • Sodium

  • Silver

  • Silicon

Explicação

Questão 31 de 54

1

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

Selecione uma das seguintes:

  • Sapphire

  • Diamond

  • Glass

  • Quartz

Explicação

Questão 32 de 54

1

Crystal is a solid that is ________________________________________________.

Selecione uma das seguintes:

  • Disordered/random arrangement of constituent particles

  • Highly ordered arrangement of constituent particles

Explicação

Questão 33 de 54

1

Amorphous solids are _________________________________.

Selecione uma das seguintes:

  • Highly ordered arrangement of constituent particles

  • Disordered/random arrangement of constituent particles

Explicação

Questão 34 de 54

1

1 ppm is _____ times smaller than 1%

Selecione uma das seguintes:

  • 1000

  • 100,000

  • 10,000

  • 1,000,000

Explicação

Questão 35 de 54

1

Silica glass is made by ________________.

Selecione uma das seguintes:

  • 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

Explicação

Questão 36 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 37 de 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 ________________.

Selecione uma das seguintes:

  • Glass; entropic

  • Glass; amorphous

  • Crystal; entropic

  • Crystal; amorphous

Explicação

Questão 38 de 54

1

Preencha o espaço em branco para completar o texto.

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

Explicação

Questão 39 de 54

1

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

Selecione uma ou mais das seguintes:

  • Potassium

  • Chromium

  • Aluminum

  • Baron

Explicação

Questão 40 de 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.

Selecione uma das seguintes:

  • Cradle-to-grave

  • Production/disposal

  • Recycling

Explicação

Questão 41 de 54

1

Preencha o espaço em branco para completar o texto.

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

Explicação

Questão 42 de 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.

Selecione uma das seguintes:

  • Cradle-to-grave

  • Recycling

Explicação

Questão 43 de 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?

Selecione uma das seguintes:

  • Material extraction and processing

  • Laptop fabrication

  • Use by consumers

  • Recycling and/or disposal

Explicação

Questão 44 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 45 de 54

1

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

Selecione uma ou mais das seguintes:

  • 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

Explicação

Questão 46 de 54

1

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

Selecione uma das seguintes:

  • 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

Explicação

Questão 47 de 54

1

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

Selecione uma ou mais das seguintes:

  • Marketing expenses

  • Use by consumers

  • Research and development

  • Recycling and disposal

  • Fabrication

Explicação

Questão 48 de 54

1

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

Selecione uma das seguintes:

  • Boiling in solvents

  • Treatment with strong acid

  • Crushing the circuit boards and then filtering out the metals

  • Physically picking them out with forceps

Explicação

Questão 49 de 54

1

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

Selecione uma ou mais das seguintes:

  • CaCo3

  • O2

  • NaCl

  • Cu

  • Na

Explicação

Questão 50 de 54

1

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

Selecione uma ou mais das seguintes:

  • Nitrogen gas

  • Argon

  • Carbon dioxide

  • Tap water

  • Soil

Explicação

Questão 51 de 54

1

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

Selecione uma ou mais das seguintes:

  • The properties of substances

  • The interaction of living systems

  • The changes of matter

  • Matter and its composition

Explicação

Questão 52 de 54

1

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

Selecione uma ou mais das seguintes:

  • H2O

  • N2

  • Salt water

Explicação

Questão 53 de 54

1

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

Selecione uma das seguintes:

  • Atoms

  • Compounds

  • Elements

Explicação

Questão 54 de 54

1

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

Selecione uma ou mais das seguintes:

  • Fluorine

  • Hydrogen

  • Nitrogen

  • Oxygen

  • Neon

Explicação