CHEMISTRY MIDDLE SCHOOL

Which formula is used to calculate acceleration? WORTH 30 POINTS A.time ÷ change in speed
B. time × change in speed
C. change in speed ÷ time
D. change in speed × time

Answers

Answer 1
Answer:

the formula used to calculate acceleration is C (i think)


Related Questions

HIGH SCHOOL

Which of the following statement(s) is/are TRUE? Intermolecular forces hold the atoms in molecules together. Vapor pressure increases with temperature. Dispersion forces are generally stronger than dipole-dipole forces. Hydrogen bonds are stronger than covalent bonds.

Answers

Explanation:

Vapor pressure is defined as the pressure exerted by vapors or gas on the surface of a liquid.  

Hence, more is the vapor pressure more will be the vapors formed. As a result, more will be the vapor pressure of the substance.

Covalent bonds are the bonds formed due to sharing of electrons. These are weak in nature as compared to hydrogen bonds. This is because hydrogen bonds have partial ionic character which makes it stronger than covalent bonds.

Intermolecular forces are the forces present within the molecules and not the interatomic force.

Therefore, we can conclude that true statement is vapor pressure increases with temperature.

MIDDLE SCHOOL

Can a liquid be measured in millimeters and kilometers

Answers

Milliliter and killoliter! So no u can't measure a liquid with meters
No. You can measure in milliliters though.
HIGH SCHOOL

which process describe water changing from a liquid state to a gas? condensation evaporation infiltration precipitation

Answers

evaporation  is the process that describe changing of water from liquid to gas

Answer: Option (b) is the correct answer.

Explanation:

When we heat a liquid substance then its molecules gain kinetic energy due to which more number of collisions occur between the particles. As a result, liquid state of substance will change into gaseous state.

This process of conversion of liquid into gaseous phase is known as evaporation.

Whereas when gaseous phase changes into liquid state then there occurs decrease in kinetic energy of molecules of a substance. Due to which they change into liquid state. This process is known as condensation.

When two aqueous solution react chemically with each other then an insoluble solid formation into the solution is known as precipitate. This type of reaction is known as precipitation.

When water present on the surface of earth enters into the soil then it is known as infiltration.

Therefore, we can conclude that evaporation process describe water changing from a liquid state to a gas.

COLLEGE

The following reaction is found to be at equilibrium at 25 celcius: 2SO3--->O2 + 2SO2 + 198kJ/mol. What is the expression for the equilibrium constant, Kc?
A.) [SO3]^2/[O2][SO2]^2
B.) 2[SO3]/[O2]2[SO2]
C.) [O2][SO2]^2/[SO3]^2
D.) [O2]2[SO2]/2[SO3]

Answers

Answer:

C.) [O₂][SO₂]²/[SO₃]²

Explanation:

Let's consider the following reaction.

2 SO₃(g) ⇄ O₂(g) + 2 SO₂(g)

The equilibrium constant (Kc) is the product of the concentration of the products raised to their stoichiometric coefficients divided by the product of the concentration of the reactants raised to their stoichiometric coefficients.

HIGH SCHOOL

What is the chemical formula for the binary compound nitrogen dioxide?

Answers

It is NO2 hope this helps

NO2

Explanation:

The compound, nitrogen(IV) oxide, is a radical species as written (it has 17 valence electrons), and participates in the following equilibrium:

2NO2(g)⇌N2O4(g)

The dimer is colourless, and contains a N−N bond presumed to derive from the coupling of the lone electrons on the 2 nitrogen centres; the radical species red brown.

Note that the attempt to represent the Lewis structures of these species invariably involves charge separation and FORMAL positive and negative charges on, respectively, nitrogen and oxygen. This is 1st year/2nd year inorganic chemistry rather than A level.

MIDDLE SCHOOL

Using the periodic table, choose the more reactive metal. Ca or Ra

Answers

Radium is more reactive than calcium so Ra.
Definitely ra ...........
MIDDLE SCHOOL

how many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

Answers

Answer:

Silver has to give up one electron.

Explanation:

Silver is a transition element and has a partially filled 4d- orbital having 9 electrons and a 5s orbital having 2 electrons in it. In order to achieve stability, silver must have completely filled d-orbital having a maximum number of 10 electrons in it.

Therefore, one electron from 5s orbital jumps to 4d orbital to make it stable. Now, 5s orbital has only one electron, and it will be easy for silver to lose this electron to attain a stable electronic configuration.

HIGH SCHOOL

In response to Boyle’s Law, the pressure of a gas increases as the volume decreases because A.the gas particles strike the walls of the container more often

B.the temperature of the gas increases

C.the gas particles get bigger

D.the gas particles strike the walls of the container with more force

Answers

Answer:

A.the gas particles strike the walls of the container more often

Explanation:

Boyle's law states that for a constant mass of an ideal gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume.

Mathematically:

where

p is the pressure of the gas

V is its volume

The reason of this relationship is that when the volume of the gas is decreased, the particles of the gas collide more frequently with the walls of the container, and therefore the average force exerted by the particles of the gas on the wall is greater; as a result, the pressure exerted by the particles of the gas on the wall is also greater.

Therefore, the correct option is

A.the gas particles strike the walls of the container more often

HIGH SCHOOL

The names of the compounds FeS, NaCl, NaOH, and Pb(CN)2 all end in the suffix A. -ite.
B. -ate.
C. -ic.
D. -ide.

Answers

Answer=D

They all end in -ide. These are ionic compounds. When naming them, you simply say the name of the metal element. Then name the nonmetal element, adding the suffix -ide to the end of the name.
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