How much energy is required to heat the solid iron from 1535 ∘C to 2000 ∘C?

Answers

Answer 1

Answer:

"206.46 J/g" energy required to heat the solid iron.

Energy due to change in temperature:

The movements or the activity of microscopic particles known as atoms, molecules, or ions in solids, solvents, as well as gases.

Thermal energy may go from one item towards the another one.

Given:

Temperature, $T_1 = 1535$ °C

$T_2 = 2000$ °C

Change, $\Delta T = T_2-T_1$

We know the relation,

→ $Q = mC_p \Delta T$

By putting the values,

$= 0.444(2000-1535)$

$= 206.46$ J/g

Thus the answer above is right.

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Answer 2

Answer:

Answer:

$Q=206.46(J)/(g)$

Explanation:

Hello,

In this case, since the energy due to the change of temperature is computed via:

$Q=mCp\Delta T$

Thus, since the specific heat of iron is 0.444 J/(g°C), the heat per unit of mass turns out:

$Q=0.444(J)/(g\°C)(2000-1535)\°C\n \nQ=206.46(J)/(g)$

Best regards.

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Calcium and bromine have formed a bond. Leading up to this, calcium gave up electrons. It was a(n)

Answers

Leading up to this, calcium gave up 2 valence electrons and thus was denoted as a cation. These 2 electrons were transferred to bromine, which received an overall negative charge because of the addition of 2 valence electrons in its valence shell, and thus formed a negatively charged ion, an anion.

Both formed an ionic bond, due to the electrostatic charge of attraction between the 2 oppositely charged ions. If many ions of Ca and Br are present and numerous ionic bonds have formed it will undergo an arrangement which is that of an ionic lattice, type of structure.

In the reaction 5 space B r to the power of minus space (a q )space plus space B r O subscript 3 to the power of minus space (a q )space plus space 6 space H to the power of plus space (a q )space rightwards arrow space 3 space B r subscript 2 space (a q )space plus space 3 space H subscript 2 O space (l )the rate of disappearance of Br- at some moment in time was determined to be 3.5 x 10-4 M/s. What is the rate of appearance of Br2 at that same moment

Answers

Answer:

$r_(Br_2)=2.1x10^(-4)M/s$

Explanation:

Hello,

In this case, for the reaction:

$5Br^-(aq)+BrO_3^-(aq)+6H^+(aq)\rightarrow 3Br_2(aq)+3H_2O(l)$

Thus, via the rate proportions between Br⁻ and Br₂ for which the stoichiometric coefficients are 5 and 3 respectively, we can write:

$(r_(Br^-))/(-5) =(r_(Br_2))/(3)$

Hence, the rate of appearance of Br₂ turns out:

$r_(Br_2)=(3r_(Br^-))/(-5)=(3*-3.5x10^(-4)M/s)/(-5)\n \nr_(Br_2)=2.1x10^(-4)M/s$

Take into account that the rate of disappearance is negative for reactants.

Best regards.

Write the name and formula of the compound made of magnesium and fluorine

Answers

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the name and formula of the compound made of magnesium and fluorine is Magnesium fluoride and MgF₂ respectively.

What is chemical Compound?

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The name and formula of the compound made of magnesium and fluorine is Magnesium fluoride and MgF₂ respectively. Magnesium fluoride is an ionic compound.

Therefore, the name and formula of the compound made of magnesium and fluorine is Magnesium fluoride and MgF₂ respectively.

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Answer:Magnesium fluorine

MgF2

Explanation:

God knows

What effect does salt have on most metals?

Answers

the combination of moisture, oxygen and salt ,especially sodium chloride, damages metal worse than rust does. This combination corrodes, or eats away at, the metal, weakening it and causing it to fall apart.

Boyd takes additional measurements of the mass of product formed in a reaction. He uses a balance that has smaller graduations than the first balance he used. What is Boyd most likely trying to change?
He is trying to increase his accuracy but not his precision.
He is trying to increase his precision but not his accuracy.
He is trying to decrease his precision and increase his accuracy.
He is trying to increase his precision and decrease his accuracy.

apparently not He is trying to increase his accuracy but not his precision.

Answers

Boyd is most likely trying to increase his accuracy but not his precision. Therefore, option A is correct.

What are accuracy and precision?

Accuracy and precision can be described as two measures of observational error. Accuracy can be defined as how close a given set of measurements, are to their true value, while precision can be defined as how close the measurements are with respect to each other.

In other words, precision can be considered a description of random errors, as well as a measure of statistical variability. Accuracy is a description of systematic errors while low accuracy can bring a difference between a result and a true value.

Accuracy as describing a combination of both kinds of observational error, so high accuracy needs both high precision and high trueness.

In simpler terms, given a set of data points from repeated measurements of the same amount, the sample can be said to be accurate if its average is close to the true value being measured.

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Answer:

The answer is D) He is trying to increase his accuracy and precision.

Explanation:

edg2020

hope this helped :)

What is the wavelength of the green light radiation that has a frequency of 6.26 x 10^14 Hz?

Answers

The wavelength of the green light radiation that has a frequency of 6.26 x 10¹⁴ Hz is 4.8 x 10⁻⁷.

What is wavelength?

Wavelength is defined as the distance between identical points or adjacent crests in the adjacent cycles of a waveform signal propagated in the space or wires.

Frequency is defined as the number of waves that passes a fixed place in a given amount of time.

It is also defined as how often something repeats.

As, c = ∧ v

So, ∧ = c / v

∧ = 3.00 x 10⁸ / 6.26 x 10¹⁴

∧ = 4.8 x 10⁻⁷

Thus, the wavelength of the green light radiation that has a frequency of 6.26 x 10¹⁴ Hz is 4.8 x 10⁻⁷.

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To find out wavelength, divide speed of light with frequency: λ = c/ν

So,
λ=(3.00 x 10^8)/(6.26 x 10^14)

Answer= 0.48 x 10^-7

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