Anyone know this question?

Answer: Acids have a sour taste. Lemons, vinegar, and sour candies all contain acids. Acids change the color of certain acid-base indicators. Two common indicators are litmus and phenolphthalein. This are som Characteristics of acid.

Answer:

Explanation:

these are the characteristics of an acid.

hope this helps!

Answer:

Taking the animal kingdom as an example, we can see that it is split into two clear groups: Invertebrates - animals without a backbone. Vertebrates - animals with a backbone.

Explanation:

Answer:

See Explanation

Explanation:

1) According to the question, the reactivity of a metal is measured by the temperature of the solution after reaction. The higher the temperature of the solution, the greater the reactivity of the metal. Based on this criterion, the metals can be arranged in an order of reactivity as follows;

Mg> Zn > Fe.

2) The equation of the reaction is;

Mg(s) + 2H^+(aq) ------>Mg^2+(aq) + H2(g)

If we consider the changes in oxidation number from left to right;

The oxidation number of Mg changed from zero to +2

The oxidation number of H changed from +1 to zero

Recall that a redox reaction is a reaction in which the oxidation number of species changes from left to right in the reaction. Hence this reaction is a redox reaction.

The reducing agent experiences an increase in oxidation number. In this case, Mg is the reducing agent.

The oxidation half equation is;

Mg(s) ------> Mg^2+(aq) + 2e

The reduction half equation is;

2H^+(aq) + 2e ------> H2(g)

Answer:

D. 108 grams of KNO3(Potassium nitrate)

Answer:

90

Explanation:

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Answer:

The formula of acceleration is final velocity-initial velocity÷time taken

Explanation:

v-u/t

Answer:

acceleration = (vFinal − vInitial)/ (tFinal − tInitial) Where v stands for velocity and t stands for time.

Answer:

[tex]\boxed {\boxed {\sf D. 0.440 \ mol \ NaOH}}[/tex]

Explanation:

To convert from moles to grams, the molar mass is used (mass of 1 mole). The values are the same as the atomic masses on the Periodic Table, but the units are grams per mole (g/mol) instead of atomic mass units.

We are given the compound sodium hydroxide (NaOH) and we need to look up the molar masses of the individual elements.

The formula for the compound has no subscripts, so there is 1 mole of each element in 1 mole of the substance. We can simply add the molar masses.

This means there are 39.9967693 grams of sodium hydroxide in 1 mole.

Use the molar mass we found as a ratio.

[tex]\frac {39.9967693 \ g \ NaOH}{ 1 \ mol \ NaOH}[/tex]

Since we are converting 17.6 grams of NaOH to moles, we multiply by this value.

[tex]17.6 \ g\ NaOH *\frac {39.9967693 \ g \ NaOH}{ 1 \ mol \ NaOH}[/tex]

Flip the ratio so the units of grams of NaOH cancel.

[tex]17.6 \ g\ NaOH *\frac {1 \ mol \ NaOH}{ 39.9967693 \ g \ NaOH}[/tex]

[tex]17.6 *\frac {1 \ mol \ NaOH}{ 39.9967693}[/tex]

[tex]\frac{17.6 }{ 39.9967693} \ mol \ NaOH[/tex]

[tex]0.4400355406 \ mol \ NaOH[/tex]

The original measurement of grams has 3 significant figures, so our answer must have the same. For the number we calculated, that is the thousandth place.

The 0 in the ten thousandths place (in bold above) tells us to leave the 0 in the thousandth place.

[tex]0.440 \ mol \ NaOH[/tex]

17.6 grams of sodium hydroxide are equal to 0.440 moles of sodium hydroxide.

Answer:

K = [HI]² / [H₂] [I₂]

Explanation:

To write the expression of equilibrium constant, K, it is important that we know how to obtain the equilibrium constant.

The equilibrium constant, K for a given reaction is simply defined as the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient. Thus, the equilibrium constant is written as follow:

K = [Product] / [Reactant]

Now, we shall determine the equilibrium constant for the reaction given in the question above. This can be obtained as illustrated below:

H₂(g) + I₂(g) —> 2HI (g)

K = [HI]² / [H₂] [I₂]

Answer:

2

Explanation:

Answer:

8.7

Explanation:

A weak acid and a strong base will form a more basic salt.

2.0 is more acidic, you'll usually see this from a reaction between a strong acid and a weak base.

6.8 and 7.0 are neutral (or close to neutral) and are formed from reactions between weak acids and weak bases, or strong acids and strong bases.

Answer:

Its pressure will be 0.54 atm at 100 K.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

Gay-Lussac's law can be expressed mathematically as the quotient between pressure and temperature equal to a constant:

[tex]\frac{P}{T} =k[/tex]

Studying two different states, an initial state 1 and a final state 2, it is satisfied:

[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{1.75 atm}{323 K} =\frac{P2}{100 K}[/tex]

Solving:

[tex]P2= 100 k*\frac{1.75 atm}{323 K}[/tex]

P2= 0.54 atm

Its pressure will be 0.54 atm at 100 K.

Answer:

E)All areas of the Earth will have twelve hours of light followed by twelve hours of dark.

Explanation:

Sana maka tulong

Answer:

E

Explanation:

guy above said so

Answer:

Explanation:

Determine the balanced chemical equation for the chemical reaction.

Convert all given information into moles (most likely, through the use of molar mass as a conversion factor).

Calculate the mole ratio from the given information.

Answer:

CaC2 + 2H20 ⇋Ca(OH)2 + C2H2

Explanation:

CaC2 + A H20 ---> Ca(OH)2 + A C2H2

This is calcium carbide reacting with water to produce calcium hydroxide and ethyne commonly called acetylene.

Let's now balance the equation.

CaC2 + 2H20 ⇋Ca(OH)2 + C2H2

Answer:

a.

[tex][H _{3}O {}^{ + } ] = 4.23 \times {10}^{ - 3} M[/tex]

b.

[tex][OH {}^{ - } ] = \frac{kw}{[H {}^{ + } ]} \\ [OH {}^{ - } ] = \frac{1 \times {10}^{ - 14} }{4.23 \times {10}^{ - 3} } \\ [OH {}^{ - } ] = 2.36 \times {10}^{ - 12} M[/tex]

c.

[tex]pH = - log[H {}^{ + } ] \\ pH = - log(4.23 \times {10}^{ - 3} ) \\ pH = 2.37[/tex]

d.

[tex]pOH = - log[OH {}^{ - } ] \\ = - log(2.36 \times {10}^{ - 12} ) \\ = 11.63[/tex]

Answer:

wheresthepicture.-

Explanation:

Answer:

don't see a picture

Explanation:

First the burning wood inside the wood stove gives off radiation heat and transfers it into the air inside the wood stove. This hot air then heats up the metal that the wood stove is made of; the metal is heated through conduction heat transfer.

The heat of the burning wood spread in the small room via radiation and convection.

Convection can be described as the transfer of heat from one place to another due to the movement of fluid. Convective heat transfer involves the combined processes of conduction and advection.

Gases and liquids are not good conductors of heat under normal temperature and pressure conditions, but they can easily transfer heat.

The convection takes place other through diffusion or advection but does not take place in solids, because there is no movement of its constituent particles happens. The diffusion of heat that occurs in solids is known as thermal conduction.

Heat transfer that takes place between a surface and a liquid that is in contact with the surface is known as convection heat transfer.  Therefore, the heat of the wood-burning stove spread in the entire room through radiation and convection.

Learn more about convection, here:

https://brainly.com/question/4138428

#SPJ2

Answer:

23.20% Na, 4.26% H, 18.41% C, and 54.13% O.

Explanation:

Hope this helped Mark BRAINLIEST!!!!

Answer:

Sodium Na 27.367%

Hydrogen H 1.200%

Carbon C 14.297%

Oxygen O 57.136%

This compound is also known as Baking Soda or Sodium Bicarbonate.

Answer:

Distance = 18 meters

Explanation:

Given the following data;

Force = 50 N

Speed = 1.5 m/s

Time = 12 seconds

To find the distance travelled;

Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.

Mathematically, speed is given by the equation;

[tex]Speed = \frac{distance}{time}[/tex]

Making distance the subject of formula, we have;

Distance = speed * time

Substituting into the formula, we have;

Distance = 1.5 * 12

Distance = 18 meters

Additionally, to find the workdone;

Workdone = force * distance

Workdone = 50 * 18

Workdone = 900 Joules

Answer: 90 degrees.

Explanation:

Answer:

well to me it is called natural energy

Explanation:

when Magnesium is reacted with Aluminum oxide, Aluminum being a less reactive metal than magnesium, is replaced by magnesium

Al2O3 + 3Mg - 3MgO + 2Al

hence reaction takes place

Answer:Base A is the weakest conductor electricity

Explanation:

Dissociation is a factor that affects electrical conductivity. The greater the percentage of dissociation for bases the stronger the conductivity of electricity.

Given that

Base A dissociates 25% in water

Base B dissociates 50%.

Base C dissociates 75%

We can conclude that  Base A is the weakest conductor oelectricity since it has the lowest percentage of dissociation.

Answer:

pH = -log 2.6 x 10-6 M

pH = 5.585

pOH= 14 - 5.585 = 8.415

8.4 as 2 sig figs

Answer:

melting point and conductivity

Explanation:

as long as both samples are copper, it will melt at the same time, aswell as conduct electricity the same.

Answer: The molarity of final solution is 0.244 M.

Explanation:

Given: [tex]M_{1}[/tex] = 1.00 M,       [tex]V_{1}[/tex] = 0.305 L

[tex]M_{2}[/tex] = ?,                [tex]V_{2}[/tex] = 1.25 L

Formula used to calculate the molarity f resulting solution is as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]

Substitute the values into above formula as follows.

[tex]M_{1}V_{1} = M_{2}V_{2}\\1.00 M \times 0.305 L = M_{2} \times 1.25 L\\M_{2} = \frac{1.00 M \times 0.305 L}{1.25 L}\\= 0.244 M[/tex]

Thus, we can conclude that the molarity of final solution is 0.244 M.