What is the common name for calcium silicate?

Answers

Answer 1

Answer: halliburton is the common name for it

Answer 2

Answer: halliburton is the common name for it

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How much heat energy is needed to raise the temperature of 59.7g of cadmium from 25°C to 100°C? The specific heat of cadmium is 0.231 J/g °C.

"Each value below represents a different aqueous solution at 25 °C. Classify each solution as acidic, basic, or?Are the following acidic, basic or nuetral? pOH=3.37 pOH=11.40 [h+]=3.8x10^-4 [h+]=5.8x10^-8 [OH-]=3.5x10^-12 [OH-]=6.6x10^-3 [h+]=1.0x10^-7 pOh=7 pH=5.11 pH=12.94"

Answers

Final answer:

The solutions having pOH=3.37, [h+]=3.8x10^-4 and pH=5.11 are acidic. Solutions with pOH=11.40, [OH-]=6.6x10^-3 and pH=12.94 are basic. The solution with [h+]=1.0x10^-7 is neutral. The solutions with [h+]=5.8x10^-8 and [OH-]=3.5x10^-12 are mildly acidic and basic respectively.

Explanation:

In an aqueous solution at 25 °C, the pH and pOH scales are defined so that water, which is neutral, has a pH of 7.00 and a pOH of 7.00. If the pH is less than 7, the solution is acidic. If the pH is greater than 7, the solution is basic. Hence, solutions with pOH=3.37 and [h+]=3.8x10^-4 are acidic, as they would have a pH lower than 7. The solutions with pOH=11.40, [OH-]=6.6x10^-3 and pH=12.94 are basic, as they would have a pH higher than 7. The solution with [h+]=1.0x10^-7 is neutral as it has a pH of 7. The solutions with [h+]=5.8x10^-8 and [OH-]=3.5x10^-12 are slightly acidic and basic respectively due to being close to the pH of 7. The solution with pH=5.11 is acidic as it's less than 7.

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Final answer:

The given solutions can be classified based on pH, pOH, [H+] and [OH-]. Based on these values, they are categorised as acidic, basic, or neutral.

Explanation:

The values provided are measures of the concentration of Hydronium ions [H+], hydroxide ions [OH-], pH, and pOH, which help determine whether a solution is acidic, basic, or neutral. At 25 degrees Celsius, a neutral solution has pH = 7, pOH=7, [H+] = 1.0x10^-7, and [OH-] = 1.0x10^-7. If the pH or [H+] is less than 7, or pOH or [OH-] is greater than 7, the solution is acidic. If the pH or [H+] is greater than 7, or pOH or [OH-] is less than 7, the solution is basic.

Applying this for each solution: pOH=3.37, acidic; pOH=11.40, basic; [H+]=3.8x10^-4, acidic; [H+]=5.8x10^-8, acidic; [OH-]=3.5x10^-12, acidic; [OH-]=6.6x10^-3, basic; [H+]=1.0x10^-7, neutral; pOH=7, neutral; pH=5, acidic; pH=12.94, basic.

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The two objects shown are made of the same element. What else is true ofboth objects?
A. They have the same shape.
B. They are made of only one kind of atom.
c. They have the same number of atoms.
D. They have the same mass.

Answers

Answer:

Explanation:

If they were to be made of the same element they would only be made of the same kind of atom.

At 25 Â°c, only 0.0640 mol of the generic salt ab is soluble in 1.00 l of water. what is the ksp of the salt at 25 Â°c? ab(s)â½âââa+(aq)+bâ(aq)

Answers

Answer: $4.09* 10^(-3)$

Explanation:

Solubility product is defined as the equilibrium constant in which a solid ionic compound is dissolved to produce its ions in solution. It is represented as

The equation for the ionization of the is given as:

$AB\rightarrow A^++B^-$

Molar concentration = $(moles)/(Volume)=(0.0640)/(1.00L)=0.0640M$

By stoichiometry of the reaction:

1 mole of $AB$ gives 1 mole of $A^+$ and 1 mole of $B^-$

When the solubility of $AB$ is S moles/liter, then the solubility of $A^+$ will be S moles\liter and solubility of $B^-$ will be S moles/liter.

$K_(sp)=[A^(+)][B^(-)]$

$K_(sp)=[0.0640][0.0640]=4.09* 10^(-3)$

Thus $K_(sp)$ of the salt at $25^0C$ is $4.09* 10^(-3)$

Calculate the pH of an aqueous solution of 16 mL of 0.00046 M HClO4(aq) after dilution to 42 mL.

Answers

1000 $cm^(3)$ of HClO_{4} [/tex] contain 0.00046mol
16 $cm^(3)$ of HClO_{4} [/tex] contain x
x = $(16cm ^(3) * 0.00046mol)/(1000cm x^(3) )$
x = 0.00000736mol

$M_(1) V_(1) = M_(2) V_(2)$
(0.00000736mol)(16 $cm^(3)$ )= $(x) (42cm^(2))$
$x= ((0.00000736mol) * (16cm^(3)) )/(42cm^(3) )$
= 0.000002803mol

pH= -log [ $H^(+)$ ]
= -log (0.000002803cm $^(3)$
= 5.55

Which best describes a compound such as magnesium oxide?

Answers

magnesium oxide is a compound that is composed of one atom of magnesium and two atoms of oxygen. The compound is a combination of Mg2+ ion and O2-. The ions translate into atoms which reflects on the subscripst of the elements already. magnesium oxide is a basic oxide with the pH level greater than 7.

Final answer:

Magnesium oxide (MgO) is an ionic compound formed by the transfer of electrons from magnesium to oxygen, resulting both atoms being electronically stable. Its properties include having high melting and boiling points, being a good electrical insulator but a thermal conductor.

Explanation:

Magnesium oxide, often referred to as 'MgO,' is a compound comprised of two different elements: magnesium and oxygen. It is a type of ionic compound because it is formed by a metal, magnesium, and a non-metal, oxygen. This creation occurs through a process called ionic bonding, where the magnesium atom effectively donates two electrons to the oxygen atom. Consequently, both atoms achieve a stable electronconfiguration.

In its solid state, MgO takes a form of a white, crystal-like substance. It's generally known for its high melting and boiling points, reflecting the strong ionic bonds in oxide structure. Furthermore, the compound stands out for being a good electrical insulator, but a thermal conductor.

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Click on the diagram to choose which atom is more reactive.

Answers

Answer:

Second graph is more reactive.

Explanation:

I just did the lesson myself, chose the first graph, and obviously got it wrong.

Therefore I can tell you with 100% certainty that the correct answer is graph #2 in this case. Hope this helps.

The first diagram is the atom that is more reactive

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