How much heat is required to heat 1.8 kg of water from 8.4oC to 17.3oC? The heat capacity of water is 4.1813 J/g*oC

Answer:

B

Explanation:

Answer:

hope it's correct.

Explanation:

element is nickel.

Answer:

c. ethylene glycol (HOCH2CH2OH)

Explanation:

Ethylene glycol is polar in nature. The -OH groups in it are able to form hydrogen bond with ethanol molecule, which makes it soluble in ethanol.

A chemical compound is a combination of different elements that are held together by chemical bonds.

Ethanol is an organic chemical compound that is known as simple alcohol.

It is naturally produced when sugar is fermented by yeast.

The compound that will be most soluble in ethanol is ethylene glycol (HOCH2CH2OH). This is because this compound is polar in nature and has the ability to form hydrogen bond and makes it soluble in ethanol.

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Answer:

Mercury Chloride

Explanation:

Trust me, this answer is correct.

Answer:

5.62 kJ

Explanation:

Let's consider the thermochemical equation for the dissolution of ammonium nitrate.

NH₄NO₃(s) ⇒ NH₄⁺(aq) + NO₃⁻(aq)   ΔH° = 25.7 kJ

25.7 kJ are absorbed per 1.00 mole of NH₄NO₃. The enthalpy change when 17.5 g of NH₄NO₃ (M: 80.04 g/mol) are dissolved is:

17.5 g × 1 mol/80.04 g × 25.7 kJ/mol = 5.62 kJ

Considering the rule of three,  if 17.5 grams of NH₄NO₃ are dissolved, the enthalpy change is 5.62 kJ.

In first place, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

That is, what is intended with it is to find the fourth term of a proportion knowing the other three.  

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.

To solve a direct rule of three, the following formula must be followed, being a, b and c known data and x the variable to be calculated:

a ⇒ b

c ⇒ x

So:  [tex]x=\frac{cxb}{a}[/tex]

Being 80 g/mole the molar mass of NH₄NO₃, that is, the amount of mass that a substance contains in one mole, the number of moles that 17.5 g of the compound contain is calculated as:

[tex]17.5 gramsx\frac{1 mole}{80 grams} =[/tex] 0.21875 moles

Then it is possible to apply the following rule of three: if when 1.00 mol of NH₄NO₃ dissolves in water the enthalpy change is ΔH =+25.7 kJ, when 0.21875 moles of the compound dissolves in water, the enthalpy change will have what value?

[tex]enthalpy change=\frac{0.21875 molesx25.7 kJ}{1 mole}[/tex]

enthalpy change= 5.62 kJ

Finally, if 17.5 grams of NH₄NO₃ are dissolved, the enthalpy change is 5.62 kJ.

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Answer:

:)

Explanation:

Petroleum gas is mainly C3 and C4 based (propane and butane), whilst natural gas is predominantly C1 and C2 (methane and ethane). Petroleum gas is generally produced via the cracking of naphtha, which is one of the components separated during crude oil refining.

Petroleum is C3 or C4 (propane and butane) while Natural Gas is C1 and C2. (methane and ethane)

Petroleum is also produced differently then Natural Gas.

"Petroleum gas is generally produced via the cracking of naphtha, which is one of the components separated during crude oil refining." - socratic.org

Answer:

In balanced equation:

reactants of Zn = 1

reactants of Cl = 2

products of Zn = 1

products of Cl = 21

The question is incomplete, the complete question is;

In the Energy and Specific Heat lab, you measure the temperature change of water to study the specific heat of a metal. What statement explains the relationship between the water and the metal you are studying? Select one: O The heat lost by the metal plus the heat gained by the water equals 100. O The temperature change of the metal is equal to the temperature change of the water. O The heat lost by the metal is equal to the heat gained by the water. The initial temperature of the metal equals the initial temperature of the water

Answer:

The heat lost by the metal is equal to the heat gained by the water.

Explanation:

When the piece of metal is put into water, heat is lost by the metal and gained by the water.

Recall that energy is conserved hence heat lost by metal must be equal to heat gained by water.

Thus, the relationship between the metal under study and the water is that the metal looses heat to the water and heat lost by metal is equal to heat gained by water.

The statement that explains the relationship that lies between the water and the metal you are studying is that  the heat lost by the metal is equal to the heat gained by the water.

The following information should be considered:

Therefore we can conclude that the statement that explains the relationship that lies between the water and the metal you are studying is that  the heat lost by the metal is equal to the heat gained by the water.

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Answer:

34672.96 s

Explanation:

m = Mass of copper = 6.32 g

M = Molar mass of copper = 63.5 g/mol

F = Faraday constant = 96500 C/mol

The electrode equation would be

[tex]Cu^{2+}(aq)+2e^{-}=Cu(s)[/tex]

Number of electrons = 2 = e

I = Current = 0.554 A

t = Time taken

Charge would be

[tex]Q=\dfrac{m}{M}eF\\\RightarrowQ=\dfrac{6.32}{63.5}\times 2\times 96500\\\Rightarrow Q=19208.82\ \text{C}[/tex]

Charge is given by

[tex]Q=It\\\Rightarrow t=\dfrac{Q}{I}\\\Rightarrow t=\dfrac{19208.82}{0.554}\\\Rightarrow t=34672.96\ \text{s}[/tex]

Time taken to deposit the copper is 34672.96 s.

Answer:

b. cannot exist in optically active form

Explanation:

Stereochemistry is a branch of chemistry that involves the spatial arrangement of the atoms of molecules and studies how this affects the physical and chemical properties of such species.

The correct structure for (2R,3S)‑2,3‑dibromobutane can be seen in the image attached below. Since the compound is a meso compound due to the plane of symmetry. Thus, the compound is achiral. i.e. Compounds that are superimposable on its mirror image. The plane of symmetry is vertical inclined at 90°(i.e. perpendicular) to the page thus goes via the middle of the molecule.

Answer:

geruow0irghvn3p0unhie0ghik

Explanation:

Answer:

[tex]3.55\times 10^{-4}\ kL[/tex]

Explanation:

Given that,

A typical coffee mug holds about 355,000 microliters of liquid.

[tex]1\ \mu L=10^{-6}\ L[/tex]

Also, 1 L = 0.001 kL

[tex]10^{-6}\ L=0.001\times 10^{-6}\ kL\\\\=10^{-9}\ kL[/tex]

So, a typical coffee mug holds about [tex]355000 \times 10^{-9}\ kL[/tex] or [tex]0.000355\ kL[/tex] of liquid.

We need to convert it into Scientific notation.

We will shift 4 zeros to right. As a result,

[tex]V=3.55\times 10^{-4}\ kL[/tex]

So, the mug will hold [tex]3.55\times 10^{-4}\ kL[/tex] of liquid.

Answer:

True (see detailed explanation).

Explanation:

Hello!

In this case, since insecticides are substances that keep crops from insects that can eat or damage them, it has been acknowledged they are important for the agricultural industry and therefore the citizens sustainability.  

However, since insecticides have really complex chemical structures, they are unlikely or sluggishly decomposed by the humans and other animals' cells, which can lead to irreversible genetic damage, cancer and other serious diseases; therefore, when they are used incorrectly, say higher amounts than necessary, spread on crops that are not significantly affected by insects or by any other reason, they are very likely to be damaging for us, animals and in general the environment.

Best regards!

Answer:

c

Explanation:

A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B

Answer:

I THINK it's D, I could be incorrect, however.

Explanation:

C3H8O, as it is flammable, and thus I wouldn't imagine it being a product of combustion. I could be incorrect, so take my answer with a grain of salt.

Answer:

Because elements cannot decompose

Explanation:

Elements are distinct substances that cannot be split-up into simpler substances. Such substances are only made up of one atom.

Answer:

the amount of concentration is about 23.9 grams of concentration you might want to add some hydrochloric acid to get the acidity to about 7 or seven depending on what you are doing

Answer:

i don't understand the question

Explanation:

Answer:

b. K⁺.

f. CH3COO⁻.

Explanation:

Hello!

In this case, since the reaction:

[tex]2KF(aq) + Mg(CH_3COO)_2(aq)\rightarrow 2KCH_3COO(aq) + MgF_2(s)[/tex]

Has a precipitation product which is magnesium fluoride, it is not ionized so the ionic equation is:

[tex]2K^+(aq)+F^-(aq) + Mg^{2+}(aq)+2CH_3COO^-(aq)\rightarrow 2K^++2CH_3COO^-(aq)(aq) + MgF_2(s)[/tex]

Thus, since potassium and acetate ions are at both reactants and product sides, we infer they are the spectator ions; therefore the answer is b. K⁺ and f. CH3COO⁻.

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The spectator ions are CH3COO– and K^+.

We must remember that spectator ions are the ions that do not undergo any change from left to right in the reaction equation.

The molecular reaction equation is;

2KF(aq) + Mg(CH3​COO)2(aq)----------​ >2KCH3​COO(aq) + MgF2​ (s)

Complete ionic reaction equation is;

2K^+(aq) + 2F^-(aq) + Mg^2+(aq) + 2CH3​COO^-(aq) ----> 2K^+(aq) +  2CH3​COO^-(aq) + MgF2​ (s)

Eliminating the spectator ions, we have the net ionic reaction equation;

Mg^2+(aq) + 2F^-(aq) ------> MgF2​ (s)

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Answer:

goes deep into the ground and pollutes the groundwater.

Answer:

It provides hydrogen ions to favor the formation of ester.

Explanation:

Hello!

In this case, since the reaction between and alcohol and a carboxylic acid yields an ester and water as an organic acid-base neutralization reaction, represented via:

[tex]R_1-OH+R_2COOH\rightleftharpoons H_2O+R_2COO-R_1[/tex]

As you can see, this reaction is at equilibrium because the ester is able to come back to the initial reactants, it means that the addition of hydrogen ions favor the reaction towards the formation of more ester, effect that is attained via the addition of sulfuric acid, which acts as a catalyst in this reaction because it provides the hydrogen ions, this reaction needs.

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Answer:

Half-life = 3 minutes

Explanation:

Using the radioactive decay equation we can solve for reaction constant, k. And by using:

K = ln2 / Half-life

We can find half-life of polonium-218

Radioactive decay:

Ln[A] = -kt + ln [A]₀

Where:

[A] could be taken as mass of polonium after t time: 1.0mg

k is Reaction constant, our incognite

t are 12 min

[A]₀ initial amount of polonium-218: 16mg

Ln[A] = -kt + ln [A]₀

Ln[1.0mg] = -k*12min + ln [16mg]

-2.7726 = - k*12min

k = 0.231min⁻¹

Half-life = ln 2 / 0.231min⁻¹

Answer:

involve the transfer of energy

Explanation:

in endothermic requires the input of energy whereas in exothermic it release energy upon completion.

Answer:

Explanation:

The sketch of the curve for two Br atoms can be seen in the image attached below. From the image below, we can deduce the following:

On the periodic table, the Bromine (Br) atom is the fourth member in the halogen family group. The atomic size increases from top to bottom down the group, thus Br atom posses a larger atomic size than Cl atom. As a result of that, the bond length formation between the two Br atoms will be larger compared to that of the two Cl atoms.

Answer:

Sodium hydroxide reacts with iron(III) chloride to produce iron(III) hydroxide and sodium chloride.

Hope this helps plz hit the crown :D