B.Use the words inside the box to complete the chart below​

Answer: 7.98 grams of [tex]Fe_2O_3[/tex] are produced if 10.7 grams of [tex]Fe(OH)_3[/tex] are reacted.

Explanation:

To calculate the number of moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]      .....(1)  

Putting values in equation 1, we get:

[tex]\text{Moles of} Fe(OH)_3=\frac{10.7g}{106.87g/mol}=0.100mol[/tex]  

The chemical equation for the reaction is

[tex]2Fe(OH)_3\rightarrow Fe_2O_3+3H_2O[/tex]

By Stoichiometry of the reaction:

2 moles of [tex]Fe(OH)_3[/tex] produce = 1 mole of [tex]Fe_2O_3[/tex]

So, 0.100 moles of [tex]Fe(OH)_3[/tex] produce= [tex]\frac{1}{2}\times 0.100=0.05mol[/tex] of [tex]Fe_2O_3[/tex]  

Mass of [tex]Fe_2O_3[/tex] =[tex]moles\times {\text{Molar Mass}}=0.05mol\times 159.69g/mol=7.98g[/tex]  

Hence 7.98 grams of [tex]Fe_2O_3[/tex] are produced if 10.7 grams of [tex]Fe(OH)_3[/tex] are reacted.

Answer:

A: 9.033 × 10^(23) kg

Explanation:

According to avogadro's number, we know that;

1 mole = 6.022 × 10^(23) kg

Thus;

1½(1.5) mole of O2 will produce;

(1.5 × 6.022 × 10^(23))/1 = 9.033 × 10^(23) kg

Looking at the options, the correct one is Option A.

Answer:

[tex]C_{tin}=0.560\frac{J}{g\°C}[/tex]

Explanation:

Hello there!

In this case, for this calorimetry problem, we can notice that the heat evolved by the hot tin is gained by the cold water as the calorimeter is perfectly isolated, so we can write:

[tex]-Q_{tin}=Q_{water}[/tex]

Thus, by defining the heats in terms of mass, specific heat and temperatures, we get:

[tex]-m_{tin}C_{tin}(T_F-T_{tin})=m_{water}C_{water}(T_F-T_{water})[/tex]

Now, since we are asked for the specific heat of tin, we solve for it as shown below:

[tex]C_{tin}=\frac{m_{water}C_{water}(T_F-T_{water})}{-m_{tin}(T_F-T_{tin})}[/tex]

Thus, when we plug in, we obtain:

[tex]C_{tin}=\frac{75.4g*4.184\frac{J}{g\°C} (27.2\°C-21\°C)}{-55.1g(27.2\°C-90.6\°C)}\\\\C_{tin}=0.560\frac{J}{g\°C}[/tex]

Regards!

Answer:

Calcium hydroxide has more atoms.

Explanation:

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rules of three:

[tex]amount of moles of calcium carbonate=\frac{2.5 moles*6.023*10^{23} atoms}{1 mole}[/tex]

amount of moles of calcium carbonate= 1.50575*10²⁴

[tex]amount of moles of calcium hydroxide=\frac{3.5 moles*6.023*10^{23} atoms}{1 mole}[/tex]

amount of moles of calcium hydroxide= 2.10805*10²⁴

2.10805*10²⁴ is greater is 1.50575*10²⁴, so calcium hydroxide has more atoms.

Answer:

Explanation:

If only one parameter can be changed in the simulation, it would be the global temperature. Human activities cause global warming and the temperature rise has caused the polar ice cap to melt. With more fresh water going into the oceans due to melting ice cap, there is a big impact on the pH.

Answer:

Explanation:

increase CO2 in atmosphere - human activity like driving cars n burning fossil fuel releases air polluntants. CO2, NOx n SO2 are all soluble in water n form acids. of the 3, CO2 is the most common pollutant n has the most effect on the pH in oceans.

Answer:

The particles in a solid are tightly packed and locked in place. Although we cannot see it or feel it, the particles are moving or vibrating in place. 

Answer:

molecules in a solid are tightly packed together and vibrate about their fixed positions.

Explanation:

there is very little movement between molecules in a solid since there is not much space between the molecules, hence the slight vibrations.

i hope this helps! :D

Answer:

                      Energy

potential energy        kinetic energy

chemical energy         thermal energy

                                                                   joules

Explanation:

chemical energy is a type of potential energy or stored energy. Heat is a kinetic energy and energy is measured in joules.

The first box is energy. It can be divided into kinetic energy in one side and potential energy in the other side. Here, kinetic energy can be converted to the thermal energy and potential energy can be converted to chemical energy. They are measure in Joules.

Potential energy and kinetic energy are two forms of energy that are commonly encountered in physics.

Potential energy is energy that an object possesses due to its position, shape, or state. An object can store potential energy when it is moved away from its equilibrium position, such as when a spring is stretched or a book is lifted to a certain height above the ground.

The amount of potential energy an object has is proportional to its mass, height, and the strength of the force that is acting on it. The average kinetic energy of an object is called its thermal energy.

Therefore,  first box is energy. It can be divided into kinetic energy in one side and potential energy in the other side. Here, kinetic energy can be converted to the thermal energy and potential energy can be converted to chemical energy. They are measure in Joules.

Find more on potential energy:

https://brainly.com/question/11749818

#SPJ2

Answer:

because not enough of the parent isotope remains to measure accurately. because not enough of the daughter product has formed to be detectable.

Explanation:

Hope it helps

Answer:

2.67g of NH4Cl are required

Explanation:

Molarity is an unit of concentration in chemistry defined as the moles of solute (In this case, NH4Cl), per liter of solution.

To prepare 100mL of a 0.50M are required:

100mL = 0.100L * (0.50 moles / L) = 0.0500 moles NH4Cl

As molar mass of NH4Cl is 53.491g/mol:

0.0500 moles * (53.491g / mol) =

Answer:

Explanation:

The liver

Answer:

Kidney

Explanation:

Answer:

Metals are found to the left of the zigzag line on the periodic table. B. Nonmetals Nonmetals are found to the right of the zigzag line on the periodic table.

Explanation:

Answer:

ok this might not be right but i think its 1,575??

Explanation:

(125)(28)(0.450)

i think you just multiply the grams, change in temp, then the cp by each other not completely sure tho

Answer:

It's because of the presence of protons.

Explanation:

A nucleus of an atom has protons and neutrons. We know that a proton has a charge of

+

1

, while a neutron has no charge, or

0

. Therefore, the nucleus of an atom will always have a positive charge.

Answer:

I dont care I want pionts

Answer:

Darmstadtium! Happy to help! :)

Answer:

decrease!

Explanation:

The fact that loudness of the sound input increases, its starts to move. Each movement pushes the membrane down. Therefore, it decreases. Your welcome !

Answer:

59.92 × 10²³ atoms are in 9.95 moles of iron

1.8 ×10²² molecules are in 0.03 moles of Carbon dioxide

1.19 moles are found in 7.20 x 10^23 atoms of platinum

Answer:

500,050000 years

Explanation:

Given that :

Rate of Accumulation = 3cm/ 1000 years

Height of seamounts = 1.5km

Representing height of seamounts in cm;

(1.5 *1000 * 100) = 1500150 cm

Time taken = height / rate

Time taken = (1500150 cm / 3cm) * 1000

Time taken = 500,050000 years

Answer:

autotrophs

Explanation:

Answer:

each compound or molecule is indicated in subscript next to the compound by an abbreviation in parentheses. For example, a compound in the gas state would be indicated by (g), solid (s), liquid (l), and aqueous (aq).

Explanation:

Answer:

2H+(aq) + CaCO3(s) → Ca2+(aq) + H2O(l) +. CO2(g). [ 2]. Award [1] for correct reactants and products. Award [1] if the ... Exercises. 1 Reaction gives off a gas: change in volume could be measured.

Answer:

Element X is Cs or cesium

Answer:

These are Magnesium bromide is MgBr2. “ionic compounds.” When atoms join together, they form either molecules or ionic compounds, depending on whether they are joined by covalent bonds or ionic bonds. ... When atoms join together by ionic bonds, they form “ionic compounds”.

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

Answer:

the cells start to deteriorate

Explanation:

the lack of oxygen to your body and cells will cause them to break down.

Answer:

Protons: 23

Neutrons: 28

Electrons: 23

I THINK

Explanation:

Answer:

The reaction between the salt and water is endothermic.

Explanation:

The reaction is endothermic because the reaction absorbs heat and causes the surroundings to become cooler.

The balance equation for the reaction is

The coefficients are 4, 5, 4, 6

Option D. 4, 5, 4, 6​ gives the correct answer to the question.

From the question given above, we obtained:

NH₃ + O₂ —> NO + H₂O

The above equation can be balance as illustrated below:

NH₃ + O₂ —> NO + H₂O

There are 2 atoms of H on the right side and 3 atoms on the left side. It can be balance by writing 4 before NH₃ and 6 before H₂O as shown below:

4NH₃ + O₂ —> NO + 6H₂O

There are 4 atoms of N on the left side and 1 atom on the right side. It can be balance by writing 4 before NO as shown below:

4NH₃ + O₂ —> 4NO + 6H₂O

There are 2 atoms of O on the left side and a total of 10 atoms on the right side. It can be balance by writing 5 before O₂ as shown below:

4NH₃(g) + 5O₂(g) —> 4NO(g) + 6H₂O(g)

Now, the equation is balanced.

The coefficients are 4, 5, 4, 6

Thus, Option D. 4, 5, 4, 6​ gives the correct answer to the question.

Learn more: https://brainly.com/question/24898561