A 16. 0g sample of iron was heated from 16oc to 35oc, it absorbed 246. 4j of energy as heat. What is the specific heat of this piece of iron?

The number of moles of potassium hydroxide that would react with 1 mole of hydrochloric acid will be 1.

From the balanced equation of the reaction as shown below:

[tex]KOH + HCl --- > KCl + H_2O[/tex]

One would see that the stoichiometric mole ratio of [tex]KOH[/tex] to that of [tex]HCl[/tex] is 1:1.

This means that 1 mole of KOH will require 1 mole of HCl for a complete reaction that obeys the law of conservation.

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Answer:

The Clean Water Act and the Endangered Species Act.

Explanation:

mining operations must follow these regulations or else they will not be able to use the land

The rate of formation of water and the decomposition of hydrogen peroxide is double as compared to rate of formation of oxygen.

The chemical reaction is given as the reaction of the reactants in the process to form the new compound.

The chemical reaction with the decomposition of hydrogen peroxide is:

[tex]\rm 2\;H_2O_2\;\rightarrow 2\;H_2O\;+\;O_2[/tex]

The rate of formation of water is given to be double the rate of formation of oxygen as 2 moles of water formed with 1 mole of oxygen.

The rate of disappearance of hydrogen peroxide is double with formation of oxygen as for decomposition of 2 moles of hydrogen peroxide, 1 mole of oxygen is formed.

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Answer:

D

Explanation:

While evaluating you will notice if it works or not

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

Here we go ~

1 mole of [tex] \sf{ COCl_2} [/tex] has 6.022 × 10²³ molecules of the given compound.

So, 0.78 mole of [tex] \sf{COCl_2} [/tex] will have ~

[tex]\qquad \sf  \dashrightarrow \: 0.78 \times 6.022 \times 10 {}^{23} [/tex]

[tex]\qquad \sf  \dashrightarrow \: \approx4.7 \times 10 {}^{23} \: \: \: molecules[/tex]

Answer:

There is no compund in the question...could you provide it please?

A factor which helped to first drive plants to live on land is: A. greater access to sunlight on land.

In Science, photosynthesis is a light-dependent process and it is typically represented by the following chemical reaction:

Carbon dioxide + water + light energy ⇒ sugar + oxygen

Based on the chemical reaction above, we can infer and logically deduce that light energy (sunlight) obtained from the Sun is a very important factor for photosynthesis.

Consequently, greater access to sunlight on land became a factor which helped to first drive plants to live on land.

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Answer:

it is A step by step

Explanation:

Answer:

It is convenient to consider the structures of the body in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms and biosphere

Explanation:

i hope it help you

Answer:

I think it's B

Explanation:

Brainlest po

Maybe i been learn this before

Vote Bbm and sara on election for the win.

With an Ag concentration of 0.020 M and a Pb2+ concentration of 0.0010 M, Only PbSO₄(s) will precipitate. The correct option is C.

Molarity is the measure of the concentration of any solute in per unit volume of the solution.

The equations are

[tex]\rm Ag_2SO_4--- > 2Ag++SO4^{-2}[/tex]

[tex]PbSO_4--- > Pb_2+ +SO4^{-2}[/tex]

Therefore:

[tex]Ag_2SO_4=[0.02^2[0.001]]\\Ag_2SO_4=4 \times 10^{-7}[/tex]

and

[tex]PbSO_4=[0.001^2[0.001]]\\PbSO_4=4*10^{-6}[/tex]

Since, [tex]PbSO_4 > > PAg_2SO_4[/tex], only  PbSO₄ will precipitate.

Thus, the correct option is (C) Only PbSO₄(s) will precipitate.

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Answer:

Below.

Explanation:

a) When limewater is heated it gives off carbon dioxide gas and leaves calcium oxide( CaO).

CaCO3 ----> CaO + CO2

b) When copper II carbonate is heated the equation is:

CuCO3 --->  CuO + CO2.

Answer(s):

::: (\_(\ Hope

*: (=' :') this

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Coefficient A: 2 must be added to the product to balance the equation.

 The mass of the reactant side is always equal to the mass of the reactant side.

To balance the chemical equation coefficient is added to make the number of atoms equal on both sides.

                La₂O₃+ 3H₂O => 2La(OH)₃

Left-hand side of atoms is equal to right-hand side La=2            

                                                                                     O=6

                                                                                     H =6

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Answer:

The moon's surface has been struck with other objects.

Explanation:

Answer 1 - Craters are not a sign of alien life as there is nothing directly showing the crater's are not natural phenomena.

Answer 2 - Craters are (normally) produced by the impact force of a foreign object that is moving quickly and collides with an object of larger size.

Answer 3 - Volcanos form mountains and magma tubes, not craters.

Answer 4 - The formation of mountains does not relate to craters in any meaningful way.

Answer: The moon’s surface has been struck with other objects.

Explanation: because those crates were caused by drifting objects such as asteroid's and meteorite's that caused craters in the moon.

the answer is D

Explanation:

Water is a liquid, it is same as the oceans water, but, swimming pool water contains Flourine (F) or Chlorine (CI) to clean it up, scinece there is no way that the water moves.

Answer:

H₂ + O₂ → H₂O

Now, check that oxygen has two atoms on the left and one on the right

so, you put 2 on the right side

H₂ + O₂ → 2H₂O

oxygen is balanced so, add 2 on H₂ to balance out hydrogen

THE FINAL BALANCED EQUATION:

Calcium nitrate is the limiting reagent and theoretical yield of calcium carbonate is 21.3 grams.

Relation between the mass and moles of any substance will be represented as:

Moles of Na₂CO₃ = 45g / 105.98g/mol = 0.424 mol

Moles of Ca(NO₃)₂ = 35g / 164g/mol = 0.213 mol

From the stoichiometry of the reaction it is clear that:

It means Ca(NO₃)₂ is the limiting reagents as less moles of this is present in the reaction, so the formation of product is depends on the amount of Ca(NO₃)₂.

Again from the stoichiometry of the reaction, it is clear that:

Theoretical mass of CaCO₃ = (0.213mol)(100g/mol) = 21.3g

Hence, required mass of calcium carbonate is 21.3g.

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[tex]\Huge{\green}\fcolorbox{blue}{cyan}{\bf{\underline{\red{\color{red}Answer}}}}[/tex]

2.96V

Explanation:

[tex] \sf Mg(s) + 2 {Ag}^{ + } (0.0001M) \longrightarrow {Mg}^{2 + } (0.130M) + 2Ag(s) \\ \\ \sf E{ \degree} = 3.17V[/tex]

As per the Nerest equation

[tex] \sf E_{cell} = E_{cell}{ \degree} - \frac{2.303RT}{nF} log \frac{ [M]}{ [{M}^{n + }] } \\ \\ \sf E_{cell} = E_{cell}{ \degree} - \frac{0.0592}{n} log \frac{[M]}{[ {M}^{n + } ]} [/tex]

Here n = 2

at the n depicts the number of electrons

M = Mg as it is neutral after the product

while M+ = Ag2+ as it is positively charge after the product

[tex] \implies \sf E =3.17 - \frac{0.0592}{2} log \frac{[Mg]}{ {[{Ag}^{ + }]}^{2} } \\ \\ \sf \implies E = 3.17 - 0.0292 log[ \frac{0.130}{ {10}^{ - 8} } ] \\ \\ \sf \implies E = 3.17 - 0.0292 log[130 \times {10}^{5} ] \\ \\ \sf \implies E = 3.17 - 0.0292 \times 7.11 \\ \\ \sf \implies E = 3.17 - 0.2076 \\ \\ \sf \boxed {\pink \implies \pink{E = 2.96V}}[/tex]

Answer: 0.065

Explanation:

The solution has high pH and low pOH when the HCl is present in that solution because of the acidic nature of HCl.

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Answer:

B. a low pH and a high pOH.

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

The symbol of the radioactive nuclide given the data is superscript 40 subscript 19 upper K (⁴⁰₁₉K)

An atom is composed of sub-particles which include

The symbol of an atom showing its atomic number and molar mass can be represented as follow

ⁿₓA

Where

ⁿₓA => ⁴⁰₁₉K

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Answer:

c

Explanation:

edge

CH₂O = C + 2.H + O

= 12.01 + 2 x 1.008 + 16

= 30.026 amu = 30.026 g/mol

The reaction of potassium iodide with silver nitrate results in the formation of silver iodide as a precipitate.

A precipitate is given as the solid deposition in the solution. It is formed as the product in the chemical reaction with the insolubility in the solution.

The reaction of KI with silver nitrate results in the formation of soluble potassium nitrate and insoluble silver iodide, which forms as the precipitate.

Thus, the reaction of potassium iodide with silver nitrate results in the formation of silver iodide as a precipitate.

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Ammonia yields nitric oxide and water in the presence of oxygen. The mass of nitric acid that will be produced from 6.40 gm of oxygen is 4.8 grams.

Mass is the product of the moles of the substance and its molar mass. it is given as,

[tex]\rm mass = moles \times molar\; mass[/tex]

The balanced chemical reaction is shown as:

[tex]\rm 4NH_{3} + 5O_{2} \rightarrow 4NO + 6H_{2}O[/tex]

Moles of oxygen are calculated by mass, 6.40 gm as,

[tex]\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass}\\\\&= \dfrac{6.40}{32}\\\\&= 0.2\;\rm moles \end{aligned}[/tex]

From the reaction, the molar ratio of nitric oxide to oxygen is 4: 5 and is used to calculate the moles of nitric oxide as,

[tex]0.2 \times \dfrac{4}{5} = 0.16[/tex]

0.16 moles and molar mass, 30 of nitric oxide is used to calculate the mass as,

[tex]0.16 \times 30 = 4.8 \;\rm gm[/tex]

Therefore, 4.8 grams of nitric oxide will be produced.

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1.3 x 10¹⁵ : 1.2 x 10⁹ = 1.083 x 10⁶

Answer:

1.3x 10 15 gallons of water / 1.2x 10 9 gallons/day=

1.1x 10 6 gallons/day

Explanation:

Answer:

Carbon dioxide and water

Explanation:

All hydrocarbons, when burned in excess of oxygen produces carbon dioxide and water [along with the unused oxygen].

The equation for the combustion of butane is:

C₄H₁₀ + 6.5O₂ → 4CO₂ + 5H₂O