Chemistry, 02.04.2020 02:43 vegeta8375

While modelling a volcano using two substances, Dereck observes bubbling and fizzing. Which of the following best names and explains the change that causes bubbling and fizzing?

A. Chemical change, because bubbling and fizzing indicate transfer of heat within substances

B. Physical change, because bubbling and fizzing indicate transfer of heat within substances

C. Chemical change, because bubbling and fizzing indicate production of a gas, which is a new substance

D. Physical change, because bubbling and fizzing indicate production of a gas, which is a new substance

Answers: 3

Show answers

Answers

Answer from: Quest

A. it generates energy from carbohydrates.b. it requires activation by oxygen.c. it is used by cells to dispose of excess electrons

Answer from: Quest

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions c.sending the first human into space4. which of these space missions involved the deployment of lunar roversa. voyager 15. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar systemb.safir7.which technology limit the future of space explorationb. scientist must first develop certain technologies before missions can be completed.

Answer from: Quest

the term hydride is commonly named after binary compounds that hydrogen forms with other elements of the periodic table. hydride compounds in general form with almost any element, except a few noble gases. the trends and properties vary according to the type of intermolecular force that bonds the elements together, the temperature, its molecular masses, and other components. hydrides are classified into three major groups, depending on what elements the hydrogen bonds to. the three major groups are covalent, ionic, and metallic hydrides. formally, hydride is known as the negative ion of a hydrogen, h-, also called a hydride ion. because of this negative charge, hydrides have reducing, or basic properties. its special characteristics will be further discussed.

explanation:

Answer from: Quest

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.

Another question on Chemistry

Chemistry, 22.06.2019 10:50

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.

Answers: 3

Answer

Chemistry, 22.06.2019 11:50

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

Answers: 2

Answer

Chemistry, 22.06.2019 18:10

Areader can tell that the meaning of “obnoxious” will include “having the quality of something” because of the .a) prefix b)pronunciation c)suffix d) word root

Answers: 3

Answer

Chemistry, 22.06.2019 20:30

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

Answers: 1

Answer

You know the right answer?

While modelling a volcano using two substances, Dereck observes bubbling and fizzing. Which of the f...

Questions