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

Elements are made of -----?

A. Atoms (Answer)

B. Molecules

C. H2O

D. Compounds
by

1 Answer

Answer :

A. Atoms (Answer)
by

Related questions

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

Which type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules

Description : Which type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules

Last Answer : Ans. (a) Dipole-Dipole interactions. (b)H-Bond. (c)Dispersion forces. (d)Dispersion forces. (e)Dispersion forces. (f)Induced dipole-dipole interactions.

Hydrogen bonds are formed when a hydrogen atom is shared between two ____. a. molecules c. elements b. atoms d. neutrons

Description : Hydrogen bonds are formed when a hydrogen atom is shared between two ____. a. molecules c. elements b. atoms d. neutrons

Last Answer : a. molecules

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

How many molecules of water does a 50g sample of H2O have?

Description : How many molecules of water does a 50g sample of H2O have?

Last Answer : The number of water molecules is 16,728.10e23.

What is the number of molecules in 5 H2O?

Description : What is the number of molecules in 5 H2O?

Last Answer : The number of molecules in 5 H2O is five.

How many molecules are contained in 3 moles of water molecules H2O?

Description : How many molecules are contained in 3 moles of water molecules H2O?

Last Answer : By definition 3 moles of water molecules.Or about 3 * 6.022140E23 water molecules = 1.806642E24 watermolecules

How many molecules of water does a 50g sample of H2O have?

Description : How many molecules of water does a 50g sample of H2O have?

Last Answer : The number of water molecules is 16,728.10e23.

What is the number of molecules in 5 H2O?

Description : What is the number of molecules in 5 H2O?

Last Answer : The number of molecules in 5 H2O is five.

How many molecules of water are produced if 2.0g of sodium sulfate are produced in the above reactionH2SO4+2NaOH=H2O+Na2SO4?

Description : How many molecules of water are produced if 2.0g of sodium sulfate are produced in the above reactionH2SO4+2NaOH=H2O+Na2SO4?

Last Answer : The reaction requires 2 moles of hydrogen gas and 1 mole of oxygen gas to produce 2 moles of water.

How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal? (a) 1 (b) 2 (c) 30 (d) 57

Description : How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal? (a) 1 (b) 2 (c) 30 (d) 57

Last Answer : d) 57

Which of the following molecules has a permanent electric dipole moment? w) H2O x) Cl2 y) CH4 z) N2

Description : Which of the following molecules has a permanent electric dipole moment? w) H2O x) Cl2 y) CH4 z) N2

Last Answer : ANSWER: W -- H2O

Which of these molecules is bound by ionic bonds? w) H2O x) CH4 y) NaCl z) C6H12O6

Description : Which of these molecules is bound by ionic bonds? w) H2O x) CH4 y) NaCl z) C6H12O6

Last Answer : ANSWER: Y -- NaCl

How many hydrogen atoms are in a molecule of water (H2O)?

Description : How many hydrogen atoms are in a molecule of water (H2O)?

Last Answer : 2The molecular formula of water is H2O. It contains 2 atoms of hydrogen.H2O =2 atoms of hydrogen.

How many hydrogen atoms are in CH3COONa plus H2O plus CO2?

Description : How many hydrogen atoms are in CH3COONa plus H2O plus CO2?

Last Answer : CH3COONa plus H2O plus CO2 has 5 Hydrogen, 3 carbon, 5 oxygen,and 1 Sodium

Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry

Description : Name the following coordination compounds according to IUPAC system of nomenclature :(i) [Co(NH3)4 (H2O)Cl]Cl2 (ii) [CrCl2(en)2]Cl, (en = ethane – 1, 2 – diamine) -Chemistry

Last Answer : (i) [CO(NH3)4 (H2O)Cl]Cl2 Tetraammine aquachlorido cobalt (III) chloride (ii) [CrCl2(en)2]Cl Dichlorobis (ethane-1, 2-diamine) chromium (III) chloride

Consider three compounds : H2S, H2Se and H2O. Identify which has the highest boiling point. Justify.

Description : Consider three compounds : H2S, H2Se and H2O. Identify which has the highest boiling point. Justify.

Last Answer : Consider three compounds : H2S, H2Se and H2O. Identify which has the highest boiling point. Justify.

During each cycle of on going fatty acid oxidation, all the following compounds are generated except (A) H2O (B) Acetyl CoA (C) Fatty acyl CoA (D) NADH FATS AND FATTY ACID METABOLISM 103

Description : During each cycle of on going fatty acid oxidation, all the following compounds are generated except (A) H2O (B) Acetyl CoA (C) Fatty acyl CoA (D) NADH FATS AND FATTY ACID METABOLISM 103

Last Answer : Answer : A

During each cycle of β-oxidation of fatty acid, all the following compounds are generated except (A) NADH (B) H2O (C) FAD (D) Acyl CoA

Description : During each cycle of β-oxidation of fatty acid, all the following compounds are generated except (A) NADH (B) H2O (C) FAD (D) Acyl CoA

Last Answer : Answer : B

Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Description : Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.

Last Answer : Ans: i) Hydrogen bond is found in H2O but not in H2S.  ii) Hydrogen bond is found in NH3 but not in PH3.  iii) Because they have low ionization energy.

Which of the following pairs of compounds will not form hydrogen bonds with each other? (a) CH3OH and CH3CH2OH (b) CH3SH and CH3CH2SH (c) CH3OCH3 and CH3CH2OCH2CH3 (d) CH3COOH and H2O

Description : Which of the following pairs of compounds will not form hydrogen bonds with each other? (a) CH3OH and CH3CH2OH (b) CH3SH and CH3CH2SH (c) CH3OCH3 and CH3CH2OCH2CH3 (d) CH3COOH and H2O

Last Answer : CH3OCH3 and CH3CH2OCH2CH3

Which is the correct order of decreasing acidity in the following compounds? A. H2O B. CH3CH3 C. NH3 D. CH2=CH2 E. HC≡CH (a) A > E > C > D > B (b) A > E > D > B > C (c) E > A > C > B > D (d) A > C > E > D > B

Description : Which is the correct order of decreasing acidity in the following compounds? A. H2O B. CH3CH3 C. NH3 D. CH2=CH2 E. HC≡CH (a) A > E > C > D > B (b) A > E > D > B > C (c) E > A > C > B > D (d) A > C > E > D > B

Last Answer : A > E > C > D > B

Which one of the following pairs of compounds illustrates the law of multiple proportion? [EAMCET 1989] (A) H2O, Na2O (B) MgO, Na2O (C) Na2O, BaO (D) SnCl2, SnCl4

Description : Which one of the following pairs of compounds illustrates the law of multiple proportion? [EAMCET 1989] (A) H2O, Na2O (B) MgO, Na2O (C) Na2O, BaO (D) SnCl2, SnCl4

Last Answer : (D) SnCl2, SnCl4

Which of the following compounds is the strongest base? w) NH3 x) PH3 y) H2O z) H2S

Description : Which of the following compounds is the strongest base? w) NH3 x) PH3 y) H2O z) H2S

Last Answer : ANSWER: W -- NH3

Which of the following compounds is the strongest acid? w) NH3 x) PH3 y) H2O z) H2S

Description : Which of the following compounds is the strongest acid? w) NH3 x) PH3 y) H2O z) H2S

Last Answer : ANSWER: Z -- H2S

Answer: Molecules and compounds.

Description : Answer: Molecules and compounds.

Last Answer : Which Austrian physicist developed the philosophy that all knowledge is simply sensation?

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

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

Last Answer : What is the 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. 

Nuclear radiation is emitted by those elements whose: A. molecules are stable B. molecules are unstable C. nuclei are stable D. nuclei are unstable (Answer)

Description : Nuclear radiation is emitted by those elements whose: A. molecules are stable B. molecules are unstable C. nuclei are stable D. nuclei are unstable (Answer)

Last Answer : D. nuclei are unstable (Answer)

What is the chemical formula of Ozone? A. H2O B. C12 C. O3 (Answer) D. CH4

Description : What is the chemical formula of Ozone? A. H2O B. C12 C. O3 (Answer) D. CH4

Last Answer : C. O3 (Answer)

Class 9th CBSE Chemistry CBQ'S (Case Base Study) Atoms and Molecules -Science

Description : Class 9th CBSE Chemistry CBQ'S (Case Base Study) Atoms and Molecules -Science

Last Answer : 1. A liquid compound X of molecular mass 18 u can be obtained from a number of natural sources. All the animals and plants need liquid X for their survival. When an electric current is passed through 200 grams of pure liquid X ... ------------------------------ More questions to be added shortly...

The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in?

Description : The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in?

Last Answer : 12 moles of KMn0O4

The energy associated with the random motion of molecules or atoms within a substance is?

Description : The energy associated with the random motion of molecules or atoms within a substance is?

Last Answer : Thermal energy

after atoms and molecules of gases and liquids are heated they move away from the heat . what takes their place?

Description : after atoms and molecules of gases and liquids are heated they move away from the heat . what takes their place?

Last Answer : ions

In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`

Description : In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`

Last Answer : In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`

In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`

Description : In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`

Last Answer : In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`

Ozone reacts with dry iodine to form an oxide having ____oxygen atoms in its molecules.

Description : Ozone reacts with dry iodine to form an oxide having ____oxygen atoms in its molecules.

Last Answer : Ozone reacts with dry iodine to form an oxide having ____oxygen atoms in its molecules.

In which of the following conversions all the three oxygen atoms of `O_(3)` molecules are utilised for oxidation: I. Ferrous oxide to ferric oxide II.

Description : In which of the following conversions all the three oxygen atoms of `O_(3)` molecules are utilised for oxidation: I. Ferrous oxide to ferric oxide II.

Last Answer : In which of the following conversions all the three oxygen atoms of `O_(3)` molecules are utilised for ... and IV only D. II, III and IV only

How many atoms of aluminum sulfur and oxygen are in 3 molecules of aluminum sulfate?

Description : How many atoms of aluminum sulfur and oxygen are in 3 molecules of aluminum sulfate?

Last Answer : 1 formula unit of aluminum sulfate has the formula Al2(SO4)3. Sothere are 2 atoms of aluminum, 3 atoms of sulfur and 12 atoms ofoxygen in 1 formula unit of aluminum sulfate. There are nomolecules of aluminum sulfate. They are called formula units.

What is the name of one element in the table above which is a gas at room temperature and in which the atoms are joined together in molecules.?

Description : What is the name of one element in the table above which is a gas at room temperature and in which the atoms are joined together in molecules.?

Last Answer : Oxygen would be such an element (as would hydrogen, nitrogen,fluorine, chlorine).

What is A repeating pattern of atoms ions or molecules in a mineral called?

Description : What is A repeating pattern of atoms ions or molecules in a mineral called?

Last Answer : crystalline structure

What is true of saturated fatty acids They have the maximum number of hydrogen atoms. They are liquids at room temperature. They have longer molecules with a bent shape. They make up most vegetable fa?

Description : What is true of saturated fatty acids They have the maximum number of hydrogen atoms. They are liquids at room temperature. They have longer molecules with a bent shape. They make up most vegetable fa?

Last Answer : What is the answer ?

What holds combinations of atoms togather in molecules?

Description : What holds combinations of atoms togather in molecules?

Last Answer : Need answer

How many atoms of chlorine are present in 1.70×10^23 molecules Cl2?

Description : How many atoms of chlorine are present in 1.70×10^23 molecules Cl2?

Last Answer : The reason for this is that one molecule of Cl2 will have 2 atoms of Cl, joined together by a bond. This means that since 1 mole is 6.022 e23 times 2 atoms/molecule =1.204 e24 Cl atoms.

How many atoms of chlorine are present in 1.70×1023 molecules Cl2?

Description : How many atoms of chlorine are present in 1.70×1023 molecules Cl2?

Last Answer : Chemistry

What is the logical order in which the concepts of atoms, molecules, cells... up to biosphere are associated?

Description : What is the logical order in which the concepts of atoms, molecules, cells... up to biosphere are associated?

Last Answer : Atoms form molecules that form cells that form tissues that form organs that form systems. Systems, in their turn, constitute individuals that form populations that compound (biological) communities that form the biotic components of ecosystems. All ecosystems of earth form the biosphere.

Which of the following contributes to the broadening of laser emission bandwidth? a. Doppler shift of moving atoms and molecules b. Amplification within the laser medium c. Coherence of the laser light d. Optical pumping of the laser transition

Description : Which of the following contributes to the broadening of laser emission bandwidth? a. Doppler shift of moving atoms and molecules b. Amplification within the laser medium c. Coherence of the laser light d. Optical pumping of the laser transition

Last Answer : a. Doppler shift of moving atoms and molecules

With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products (A) Decreases (B) Increases (C) Remain same (D) Unpredictable from the data

Description : With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products (A) Decreases (B) Increases (C) Remain same (D) Unpredictable from the data

Last Answer : (B) Increases

What would happen if dipole develops momentarily in atoms and non polar molecules which are electrically symmetrical?

Description : What would happen if dipole develops momentarily in atoms and non polar molecules which are electrically symmetrical?

Last Answer : Ans. London forces or dispersion forces are developed.

Which option is correct about the levels of organization: D A. Molecules - atoms -cellstissues -organs-body-organismpopulation - community - ecosystem B. Atoms -molecules -tissues -cells-organs-body-organismcommunity -population -ecosystem C. Molecules-Atoms-cells-organs-tissues-body-organismD. Atoms-molecules-cells-tissues-organs-body-organism

Description : Which option is correct about the levels of organization: D A. Molecules - atoms -cellstissues -organs-body-organismpopulation - community - ecosystem B. Atoms -molecules ... C. Molecules-Atoms-cells-organs-tissues-body-organismD. Atoms-molecules-cells-tissues-organs-body-organism

Last Answer : Atoms-molecules-cells-tissues-organs-body-organism