What are substances that are extended structures made up of billions of tightly packed atoms and molecules?

What are substances that are extended structures made up of billions of tightly packed atoms and molecules?
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(1) they contain free electrons Explanation: Metals typically consist of closepacked atoms, meaning that the atoms are arranged like closely packed spheres. Two packing motifs are common, one being bodycentered cubic wherein each metal atom is surrounded by eight equivalent atoms. The other main motif is face-centered cubic where the metal atoms are surrounded by six neighboring atoms. Several metals adopt both structures, depending on the temperature.

Description : (1) they contain free electrons Explanation: Metals typically consist of closepacked atoms, meaning that the atoms are arranged like closely packed spheres. Two packing motifs are common, one ... surrounded by six neighboring atoms. Several metals adopt both structures, depending on the temperature.

Last Answer : Helium gas is filled in ballons because (1) its atomic number is 2 (2) it is lighter than air (3) it is one of the constitutents of water (4) it is a noble gas

Which is safer on the freeway: Merging into a cluster of tightly packed cars at the cluster's speed of 60 MPH? Or going around the entire cluster at 80 MPH and then pulling into a clear spot?

Description : Which is safer on the freeway: Merging into a cluster of tightly packed cars at the cluster's speed of 60 MPH? Or going around the entire cluster at 80 MPH and then pulling into a clear spot?

Last Answer : answer:What is the speed limit? What kind of roadway? What are the driving conditions? These all play a factor.

In which state matter are particles packed very tightly together?

Description : In which state matter are particles packed very tightly together?

Last Answer : Solid !

A liquid substance _______. A. has particles packed tightly together B. has definite volume C. has definite shape D. has particles arranged in a regular pattern?

Description : A liquid substance _______. A. has particles packed tightly together B. has definite volume C. has definite shape D. has particles arranged in a regular pattern?

Last Answer : has definite volume

Using X-ray crystallography, this woman scientist determined the structures of large biochemical molecules, including penicillin in 1949 and vitamin B12 in 1956. In 1969 she determined the three dimensional structure of insulin. In 1964 she was awarded the Nobel Prize in chemistry "for her determination by X-ray techniques of the structures of important biochemical substances." Name this woman scientist.

Description : Using X-ray crystallography, this woman scientist determined the structures of large biochemical molecules, including penicillin in 1949 and vitamin B12 in 1956. In 1969 she determined the three ... X-ray techniques of the structures of important biochemical substances." Name this woman scientist.

Last Answer : ANSWER: (DOROTHY) CROWFOOT HODGKIN

What types of proteins are involved in the packaging and condensing of DNA into tightly wound nucleosome structures of a chromosome?

Description : What types of proteins are involved in the packaging and condensing of DNA into tightly wound nucleosome structures of a chromosome?

Last Answer : Histone

There are a multitude of various dressings available. Which of the following statement(s) is/are true concerning options for surgical dressings? a. Hydrocolloids, such as karaya compounds, offer the primary advantage of increased absorptive ability b. Films, such as Op-site, provide a water impermeable environment to achieve a dry wound c. Impregnates are fine gauze impregnated with a variety of substances such as antibiotics or moisturizing agents that adhere tightly to the wound and do not require a secondary dressing d. Absorptive powders and paste are highly useful in debriding necrotic and fibrous material from wounds and absorbing wound serum

Description : There are a multitude of various dressings available. Which of the following statement(s) is/are true concerning options for surgical dressings? a. Hydrocolloids, such as karaya compounds, offer ... are highly useful in debriding necrotic and fibrous material from wounds and absorbing wound serum

Last Answer : Answer: a, d Although the simplest dressing of gauze and tape combined with the use of antibacterial ointment can achieve moist wound healing in most patients. A multitude of other ... agents have high absorbency for tissue wound fluid and debride necrotic and fibrous material from the wound

Those substances which have so far not been resolved by any means into other substances of simpler form are called  A. elements  B. compounds  C. atoms  D. molecules

Description : Those substances which have so far not been resolved by any means into other substances of simpler form are called  A. elements  B. compounds  C. atoms  D. molecules

Last Answer : Answer: A

In which material, valence electrons are tightly bounded to their parent atoms ?

Description : In which material, valence electrons are tightly bounded to their parent atoms ? (a) Conductor (b) Semiconductor (c) Insulator (d) Magnetic 

Last Answer : insulator(b)

Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above

Description : Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above

Last Answer : Ans:(b)

Metals are good conductors of electricity because - (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Description : Metals are good conductors of electricity because - (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Last Answer : (1) they contain free electrons Explanation: Copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points.

Metals are good conductors of electricity because – (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Description : Metals are good conductors of electricity because – (1) they contain free electrons (2) the atoms are lightly packed (3) they have high melting point (4) All of the above

Last Answer : (1) they contain free electrons Explanation: Copper is used for electrical wiring because it is a good conductor of electricity. Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points.

Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure. (A) Hexagonal close, packed (hcp) (B) Face centred cubic (fcc) (C) Body centred cubic (bcc) (D) Simple cubic

Description : Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure. (A) Hexagonal close, packed (hcp) (B) Face centred cubic (fcc) (C) Body centred cubic (bcc) (D) Simple cubic

Last Answer : (D) Simple cubic

How many neighboring atoms are in contact with each a in a hexagonal close-packed structure?

Description : How many neighboring atoms are in contact with each a in a hexagonal close-packed structure?

Last Answer : ANSWER: 12

A coalescer in a mixer-settler liquid-liquid extraction column (A) Comprises of thin bed of substances of extended surface having high porosity (B) Helps in increasing the bubble size entering the settler (C) Helps in increasing the settling rate of the bubbles (D) All 'a', 'b', & 'c'

Description :  A coalescer in a mixer-settler liquid-liquid extraction column (A) Comprises of thin bed of substances of extended surface having high porosity (B) Helps in increasing the bubble size entering the settler ... increasing the settling rate of the bubbles (D) All 'a', 'b', & 'c'

Last Answer : (D) All 'a', 'b', & 'c'

Elements are made of -----? A. Atoms (Answer) B. Molecules C. H2O D. Compounds

Description : Elements are made of -----? A. Atoms (Answer) B. Molecules C. H2O D. Compounds

Last Answer : A. Atoms (Answer)

Schwann's cell theory basically states that: a) cells are the building blocks of living things. b) cells require oxygen. c) cells are made of atoms and molecules. d) cells require nutrients.

Description : Schwann's cell theory basically states that: a) cells are the building blocks of living things. b) cells require oxygen. c) cells are made of atoms and molecules. d) cells require nutrients.

Last Answer : ANSWER: A -- CELLS ARE THE BUILDING BLOCKS OF LIVING THINGS. 

BP oil is spending billions to clean up the oil spill. How long will it take for them to start charging us for their efforts?

Description : BP oil is spending billions to clean up the oil spill. How long will it take for them to start charging us for their efforts?

Last Answer : answer:The began charging us about a decade ago !! I don't think they can raise gas prices much more as it is back to $3 a gallon in most of the country which it's pretty much the limit of what ... strung up ! * I believe they will have to build a expansion wing in Hell to house BP executives !!

Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand

Description : Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand

Last Answer : structures in DNA caused by inverted repeats

Which of the following is not characteristic of resonance? (a) The canonical structures have the constituent atoms in the same relative positions (b) They have nearly the same energy (c) They have the same number of unpaired electrons (d) The actual structure can be represented on paper using the conventional symbols

Description : Which of the following is not characteristic of resonance? (a) The canonical structures have the constituent atoms in the same relative positions (b) They have nearly the same energy (c) ... of unpaired electrons (d) The actual structure can be represented on paper using the conventional symbols

Last Answer : Ans:(d)

Diamond is harder than graphite because of – (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these

Description : Diamond is harder than graphite because of – (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these

Last Answer : (1) difference in layers of atoms Explanation: Diamond is harder than graphite because diamond has a more complex structure. Diamond's structure is like many pentagons connected together, each pentagon ... together in some way. Graphite's structure is very loose, with its bonds forming layers.

Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and Structures of alloys.

Description : Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and Structures of alloys.

Last Answer : Alloys are produced by melting or sintering two ore more metals, or metals and a non-metal, together. Alloys possess typical properties inherent in the metallic state. The chemical elements ... an alloy are its individual portions, each having a single structure with its characteristic features.

Which statement about the carbonyl group is NOT true? (a) The carbonyl carbon is sp2 hybridized. (b) The bond angles among the three atoms attached to the carbonyl carbon are 120°. (c) The three atoms attached to the carbonyl carbon form a nonplanar geometry. (d) The carbonyl group forms resonance structures.

Description : Which statement about the carbonyl group is NOT true? (a) The carbonyl carbon is sp2 hybridized. (b) The bond angles among the three atoms attached to the carbonyl carbon are 120°. (c) ... attached to the carbonyl carbon form a nonplanar geometry. (d) The carbonyl group forms resonance structures.

Last Answer : The three atoms attached to the carbonyl carbon form a nonplanar geometry

Resonance structures of a molecule have (a) same arrangement of atoms (b) different arrangement of atoms (c) same number of paired electrons (d) different number of paired electrons

Description : Resonance structures of a molecule have (a) same arrangement of atoms (b) different arrangement of atoms (c) same number of paired electrons (d) different number of paired electrons

Last Answer : same arrangement of atoms same number of paired electrons

Diamond is harder than graphite because of : (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these

Description : Diamond is harder than graphite because of : (1) difference in layers of atoms (2) tetrahedral structure of diamond (3) difference of crystalline structures (4) None of these

Last Answer :  difference in layers of atoms

Could you go to the beach and enter the water safely billions of years ago here on earth? In the sense that there used to be different species of marine animals and fish that could be dangerous to humans.

Description : Could you go to the beach and enter the water safely billions of years ago here on earth? In the sense that there used to be different species of marine animals and fish that could be dangerous to humans.

Last Answer : Just going back 1 billion yeas will put you in the Protozoic Era. It would be pretty safe for humans. There were harmless sponges and single cell animals at that time. No fish, reptiles or marine mammals.

What do you think the tooth-fairy does with the billions of teeth she collects?

Description : What do you think the tooth-fairy does with the billions of teeth she collects?

Last Answer : Eats them. Good calcium source.

It’s the future, you are a Commander, you died after your space ship was shot down, and you were revived after 2 years by a human terrorist organization after they spent Billions of Dollars for your revival. What do you do?

Description : It’s the future, you are a Commander, you died after your space ship was shot down, and you were revived after 2 years by a human terrorist organization after they spent Billions of Dollars for your revival. What do you do?

Last Answer : [deleted]

How many billions do you think Trump’s businesses are going to get from the Saudis as investment after he leaves office?

Description : How many billions do you think Trump’s businesses are going to get from the Saudis as investment after he leaves office?

Last Answer : What makes you think he isn’t getting money from Saudis and Russians and coal companies and steel companies? He in it for the money.

What do cities with billions of liters of raw sewage do with it instead of dumping it in the river?

Description : What do cities with billions of liters of raw sewage do with it instead of dumping it in the river?

Last Answer : Fertilizer on crops. We can export it to Asian farmers and turn a negative into a positive. Edit if every city did dumping then the water would become undrinkable and be contaminated.

Be honest. If you were worth millions, billions of dollars, would you have cosmetic surgery?

Description : Be honest. If you were worth millions, billions of dollars, would you have cosmetic surgery?

Last Answer : No. I’ve had necessary surgery. I cannot fathom why people opt for elective, cosmetic surgery. The end does not justify the means to me.

How does Santa Claus procure all the presents for the billions of children?

Description : How does Santa Claus procure all the presents for the billions of children?

Last Answer : Santa Claus is actually the CEO of Amazon.

Does the fact that there are billions of lives happening all at once here amaze you?

Description : Does the fact that there are billions of lives happening all at once here amaze you?

Last Answer : answer:It is safe to assume the LSD you bought was real. :-) Here is the fun part. You can start putting yourself in the other peoples shoes. Life is a bit better once you develop some empathy. We are all in this together and we have a duty to help others when we can. I am not religious

Which was money better spent, trillions on an unneeded war, or billions for electric cars?

Description : Which was money better spent, trillions on an unneeded war, or billions for electric cars?

Last Answer : Hm well, the thing is, from what I understand is a compilation of businessmen in the oil industry all came together and came out with a number of how much crude oil is obtainable from the Earth still ... , money was better spent on neither, because they balance themselves out. But I'm not for war.

To win the war in Afghanistan will take how many more 100s of billions of dollars?

Description : To win the war in Afghanistan will take how many more 100s of billions of dollars?

Last Answer : Eleventy one more dollars.

Why does Israel, who America gives billions of dollars a year to, not have a mutual extradition law with us and allow criminals from the U.S. to flee to Israel to escape prosecution here?

Description : Why does Israel, who America gives billions of dollars a year to, not have a mutual extradition law with us and allow criminals from the U.S. to flee to Israel to escape prosecution here?

Last Answer : I'm under the impression (and it could be wrong but this is just what I've heard) that we give them millions, not billions. Granted it's hundreds of millions, but yah. Back up the numbers you ... law as it might force us to extradite some people that we don't think should be, think Palestinians).

How can we tell the Universe is billions of years old?

Description : How can we tell the Universe is billions of years old?

Last Answer : Count the rings. Sorry. I had to do it.

I have billions of eyes, yet I live in darkness. I have millions of ears, yet only four lobes. I have no muscle, yet I rule two hemispheres. What am I? -Riddles

Description : I have billions of eyes, yet I live in darkness. I have millions of ears, yet only four lobes. I have no muscle, yet I rule two hemispheres. What am I? -Riddles

Last Answer : The human brain.

Food and beverage companies spend billions of dollars a year on advertising in the U.S?

Description : Food and beverage companies spend billions of dollars a year on advertising in the U.S?

Last Answer : YES. Food, beverage and restaurant companies spend almost $14 billion per year on advertising in the United States (Rudd Center 2017 analysis of Nielsen data). More than 80% of this advertising promotes fast food, sugary drinks, candy, and unhealthy snacks.

one Billions Equal How much ?

Last Answer : one Billions Equal 100 Crores.

Read the following statements (A-D) `:-` A. RBCs are the most abundant of all the cells in blood B. A healthy adult man has on an average 5 Billions t

Description : Read the following statements (A-D) `:-` A. RBCs are the most abundant of all the cells in blood B. A healthy adult man has on an average 5 Billions t

Last Answer : Read the following statements (A-D) `:-` A. RBCs are the most abundant of all the cells in blood B. A healthy ... `:-`` A. Four B. Three C. Two D. One

What is a group of billions of stars that form a system?

Description : What is a group of billions of stars that form a system?

Last Answer : a galixy

Starting billions of years ago in what way did algae change the atmosphere of earth?

Description : Starting billions of years ago in what way did algae change the atmosphere of earth?

Last Answer : Carbon dioxide was converted to oxygen.

Which of these is a grouping of billions of stars, gas, and dust held together by gravity?

Description : Which of these is a grouping of billions of stars, gas, and dust held together by gravity?

Last Answer : galaxy

Life of bearing is expressed in a.. A. Billions of revolution B. Lacks of revolution C. Hundreds of revolution D. None of these

Description : Life of bearing is expressed in a.. A. Billions of revolution B. Lacks of revolution C. Hundreds of revolution D. None of these

Last Answer : A. Billions of revolution

Technology ___________ has the power to help the billions of poor people all over the earth. a. Not guided by ethics. b. Guided by ethics. c. Guided by Scientists.d. None of the above.

Description : Technology ___________ has the power to help the billions of poor people all over the earth. a. Not guided by ethics. b. Guided by ethics. c. Guided by Scientists.d. None of the above.

Last Answer : b. Guided by ethics.

Technology ___________ has the power to help the billions of poor people all over the earth. a. Not guided by ethics. b. Guided by ethics. c. Guided by Scientists. d. None of the above.

Description : Technology ___________ has the power to help the billions of poor people all over the earth. a. Not guided by ethics. b. Guided by ethics. c. Guided by Scientists. d. None of the above.

Last Answer : b. Guided by ethics.

What Molecules of what substances are stored in synaptic terminals?

Description : What Molecules of what substances are stored in synaptic terminals?

Last Answer : Need answer

The substances which are capable of ab- sorbing combined water or elements of water from molecules of compounds are called?

Description : The substances which are capable of ab- sorbing combined water or elements of water from molecules of compounds are called?

Last Answer : Dehydrating agent

Cell membranes a. consist almost entirely of protein molecules b. are impermeable to fat-soluble substances c. in some tissues permit the transport of glucose at a greater rate in the presence of insulin d. are freely permeable to electrolytes but not to proteins e. have a stable composition throughout the life of the cell

Description : Cell membranes a. consist almost entirely of protein molecules b. are impermeable to fat-soluble substances c. in some tissues permit the transport of glucose at a greater rate in the presence of ... to electrolytes but not to proteins e. have a stable composition throughout the life of the cell

Last Answer : in some tissues permit the transport of glucose at a greater rate in the presence of insulin