When steel wool is burned it is oxidized.
A) True
B) False

Explanation:

100 grams of magnesium:

1 mole of Mg atom = 6.022×10

23

atoms

This means 24g of Mg has 6.022×10

23

atoms

Then 100 g contains:

Number of Mg atoms=

Molar mass

Given mass

×6.022×10

23

Number of atoms=

24

100

×6.022×10

23

Number of Mg atoms = 2.5×10

24

atoms

100 grams of aluminium:

1 mole of atom= 6.022×10

23

atoms

This means 27g of Al has 6.022×10

23

Then 100 g contains:

Number of Al atoms=

Molar mass

Given mass

×6.022×10

23

Number of Al atoms=

27

100

×6.022×10

23

Number of Al atoms= 2.2×10

24

atoms

Thus, 100g of magnesium has more atoms.

Answer:

Deduce the balanced chemical equation:

CaCO3(s) + 2HCl(aq) > CaCl2 + H2O(l) + CO2(g)

2. Write as ionic species:

Ca2+(aq) + CO3 2- (aq) + 2H+ + 2Cl- > Ca2+(aq)+ 2Cl-(aq) + H2O(l) + CO2(g)

3. Identify ions on the right that also appear on the left, and eliminate them. (As Robert Cruikshank says, these are known as ’spectator ions’ and take no overall part in the reaction):

CO3 2- (aq) + 2H+(aq) > H2O(l) + CO2(g)

This is the balanced ionic equation.

Answer:

[tex]n_{F_2}=8.5molF_2[/tex]

Explanation:

Hello there!

In this case, since the reaction is not given and may find thousands of options for obtaining potassium chloride, we may assume that the undergoing reaction is the formation of potassium fluoride from elemental potassium and fluorine:

[tex]2K+F_2\rightarrow 2KF[/tex]

Whereas we can find a 1:2 mole ratio of fluorine to potassium fluoride; in such a way, given 17 moles of the latter, we can find the moles of the former as shown below:

[tex]n_{F_2}=17molKF*\frac{1molF_2}{2molKF} \\\\n_{F_2}=8.5molF_2[/tex]

Regards!

Answer:

The density of igneous rocks is related to its color. Darker colored rocks have a higher density because of its greater mineral and iron content. Its characteristics is opposite compared to lighter colored rocks that have less density because of lower mineral and iron content

Answer:

Yeah

Explanation:

Propylene glycol can be dehydrated to propionaldehyde which can in turn be reductively aminated to propylamine.

Propionaldehyde can be converted to n-propyl amine in two steps.

Conversion of propionaldehyde to oxime

Propionaldehyde is treated with hydroxyl amine in weakly acidic medium to form imine product known as propionaldoxime.

CH₃CH₂CHO+NH₂OH->CH₃CH₂CH=N-OH+H₂O

Reduction of imine to form amine

In this step,propionaldoxime is reduced by proper reducing agent like Na in ethanol to form n-propyl amine.

CH₃CH₂CH=NO-Na-C₂H5OH-> CH₃CH₂CH₂NH₂

Answer: The pressure is 8451.2 torr.

Explanation:

Given: Mass of He = 7.55 g

Volume = 5520 mL

Convert mL into L as follows.

[tex]1 mL = 0.001 L\\5520 mL = 5520 mL \times \frac{0.001 L}{1 mL}\\= 5.520 L[/tex]

Temperature = [tex]123^{o}C = (123 + 273) K = 396 K[/tex]

Now, moles of He (molar mass = 4.00 g/mol) are as follows.

[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{7.55 g}{4 g/mol}\\= 1.8875 mol[/tex]

Formula used to calculate pressure is as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

[tex]PV = nRT\\P \times 5.520 L = 1.8875 mol \times 0.0821 L atm/mol K \times 396 K\\P = 11.12 atm[/tex]

Convert atm into torr as follows.

1 atm = 760 torr

[tex]11.12 atm = 11.12 atm \times \frac{760 torr}{1 atm}\\= 8451.2 torr[/tex]

Thus, we can conclude that the pressure is 8451.2 torr.

Explanation:

molecules of Hydrogen gas to produce 1 molecule of ... 1 mol CO. 1 mol CO. 1 mol CH3OH. 2 mol H2. 1 mol CO. 1 mol CO. 1 mol CH3OH ... How many moles of hydrogen.

is there anything wrong with it

Answer:

the answers to your question is b.22

Answer:

See Explanation

Explanation:

A biosphere is a zone of life found on earth. Since the artificial biosphere has all the elements that support and sustain human life, then there must also be soil in the artificial biosphere.

If that is the case, then we can engage in massive tree planting. Trees take in carbon dioxide and release oxygen. Hence if a large number of trees are planted all over the artificial biosphere, the trees will eventually produce large enough oxygen to support human life overtime.

Answer:

2.5 moles of ions

Explanation:

In order to solve this problem, first we need to determine how many moles of ions are there in one mol of aluminum sulfate:

With the above information in mind we can proceed to calculate how many moles of ions would there be in 0.5 moles of Al₂(SO₄)₃:

Cooled in ice to help the water vapour condense. Tube 2 – contains lime water, goes cloudy to show the presence of carbon dioxide. Word equation: (hydrocarbon + oxygen → carbon dioxide + water) Methane + oxygen → carbon dioxide + water.

Answer:

A, Animal-like protists are called protozoa. ... Like animals, they can move, and they are heterotrophs. That means they eat things outside of themselves instead of producing their own food

Explanation:

Answer:

Filtration and evaporation

Explanation:

A mixture of sand, pink sugar and water can be separated by filtration and evaporation.

The pink sugar is already dissolved in the water but the sand remains undissolved in the water hence it can be filtered off. The filtrate now contains the sugar.

The sugar is obtained from the filtrate by evaporation of the solution to yield the solid pink sugar and steam which can be condensed again to give liquid water.

Answer:

Water

Explanation:

Hydropower plants capture the energy of falling water to generate electricity. A turbine converts the kinetic energy of falling water into mechanical energy. Then a generator converts the mechanical energy from the turbine into electrical energy.

Answer:

Water

Explanation:

Answer:

symbol?

Explanation:

Answer:

yes smoke is chemically combined because smoke is a collection of airborne solid and liquid particles and gases released when a material burn.

hope it is helpful to you

Answer:

[tex]412.8 \frac{gCaCl_2}{kg\ agua} \\\\29 \frac{gNaCl}{kg\ agua}[/tex]

Explanation:

¡Hola!

En este caso, dado que se nos dieron las moles de cada sal por cada kilogramo de agua, es necesario para nosotros calcular los gramos por medio de la masa molar de estas, que son 110.98 g/mol y 58.44 g/mol respectivamente.

De este modo, realizamos las conversiones de moles a masa como se muestra a continuacion:

[tex]3.72\frac{molCaCl_2}{kg\ agua} *\frac{110.98gCaCl_2}{1molCaCl_2}=412.8 \frac{gCaCl_2}{kg\ agua} \\\\0.5\frac{molNaCl}{kg\ agua} *\frac{58.44gNaCl}{1molNaCl}=29 \frac{gNaCl}{kg\ agua}[/tex]

¡Saludos!

Answer:

Constant

Explanation:

Here's the definition of the noun:

"A situation that does not change"

In this case the situation is the speed of the object.

If you'd like to go into further detail, let's move away from English and jump into Physics. The question asked for "object's force" - keyword: 'force'. What's the formula for force? F = m * a.

F = Force, m = mass, a = acceleration.

Okay well, the question said only the speed changes and doesn't mention the mass changing so if the mass changes the force won't be constant. However, if the mass doesn't change (constant), we can continue to acceleration.

The formula for acceleration is (I think) m/s^2, that's metres over time, squared. As we know from English class; the speed is constant and thus the square of that speed is also constant - therefore the acceleration is constant.

Now, putting them together, assuming the mass is constant, we know the acceleration is constant so the force has to be constant. Case closed.

*mic drops, this was a waste of time*

Answer:

A chemical reaction is the change in chemical form rather than physical due to an outside force. This can come from something as simple as a change in temerature to as large as a specific element or compound.

Answer:

0.5%m/V y 0.0352M.

Explanation:

El %m/V se define como la masa de soluto (Na2SO4 en este caso) en 100mL de solución.

La molaridad de esta solución son las moles de Na2SO4 por litro de solución

La solución original se diluye de 50.0mL a 0.800L = 800mL. Esto es una dilución de:

800mL / 50.0mL = 16 veces

Como la concentración original es de 8.0%m/V, la de la dilución será:

8.0%m/V / 16 = 0.5%m/V

Esto significa que en 100mL = 0.1L hay 0.5g. Para hallar la molaridad debemos convertir estos 0.5g a moles con la masa molar del Na2SO4 = 142.04g/mol:

0.5g * (1mol / 142.04g) = 0.00352 moles Na2SO4 en 0.1L:

0.00352 moles / 0.1L =

0.0352M

The question is incomplete, the complete question is shown in the image attached to this answer.

Answer:

139.13

Explanation:

The average atomic mass of the element Likhitium is the sum of the relative abundance of all the isotopes of Likhitium.

We obtain the relative atomic mass of Likhitium as follows;

(44.7/100 * 138) + (52.3/100 * 139) + (0.5/100 * 140) + (2.5/100 * 141)

61.7 + 73.2 + 0.7 + 3.53 = 139.13

Hence the relative abundance of Likhitium is 139.13

Answer:

Zn + H2SO4  ZnSO4 + H2

Explanation:

Start by balancing the equation. This one is already balanced.

(1 zinc, 2 hydrogen, 1 sulfur and, 4 oxygen on each side of the equation).

The mole ratio just refers to the coefficient (the number before each molecule or atom). Since there are no numbers in this equation all coefficients are 1.

Mole ratio = 1:1

Answer:

1 1

Explanation:

Hill

1

Answer:

407.7c

Explanation:

200.0C = 0.325 atm

400.0C = 0.650 atm

407.7C = 0.675 atm

A sample of neon gas at 200.0C has a pressure of 0.325 atm.  The temperature is 407.7 C is by the pressure reaches 0.675 atm.

There are three basis gas laws which relates the pressure, temperature, and volume of the gas.

The temperature and pressure increase is given this.

200.0C = 0.325 atm

400.0C = 0.650 atm

407.7C = 0.675 atm

Thus, the correct option is 407.7C = 0.675 atm.

Learn more about gas laws

https://brainly.com/question/12669509

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Answer:

i think kinetic energy sorry if I'm wrong.

Answer:

The varying frequencies of solar energy are explained by the electromagnetic spectrum, which organizes the frequency types based on wavelength, which are measured in nanometers. The longer the wavelength the less energy the wave carries, the shorter the wavelength the higher the energy. The electromagnetic spectrum is displayed in the chart below.

Hope this helps. :)

Answer:

The line with spikes and semicircles is a stationary front, it brings days of steady rain.

Explanation:

L means Low pressure, it brings stormy weather with strong winds.

H means High pressure, it brings fair weather and light winds.

The line with spikes is a cold weather front, it brings thunderstorms and colder

temperatures.

The line with spikes and semicircles is a stationary front, it brings days of steady rain.

Answer:

See Explanation

Explanation:

Elements in group fourteen are mostly known to form compounds in which there are four electron domains leading to a tetrahedral electron domain geometry.

However, the presence of lone pairs affects the shape of the molecule. SnCl3− has four electron domains, three of them are bond pairs while one is a lone pair. The shape of the molecule is based on a tetrahedron, however the observed geometry is trigonal pyramidal due to the presence of the lone pair. Its bond angle is now less than the predicted 109 degrees.

Answer:

7.5 g of AlCl3

Explanation:

The given equation is;

NaOH + AlCl3 --> Al(OH)3 + NaCI.

By inspection, it is not balanced because OH and Clare not equal on both sides of the equation.

Thus, let's make them equal by balancing the equation.

Cl has 3 on the left, so we will make it to have 3 on the right. Same thing with OH on the right and we will make it to have 3 on the left. Thus:

3NaOH + AlCl3 --> Al(OH)3 + 3NaCI

We can see that;

NaOH has 3 moles

While AlCl3 has 1 mole

Thus, to find how many grams of AlCl3 will be required to completely react with 2.25g of NaOH ;

2.25g of NaOH × (3 moles NaOH/39.997 g/mol of NaOH) × (1 mole of AlCl3/3 moles of NaOH) × (133.34 g/mol of AlCl3/1 mol AlCl3) = 7.5 g of AlCl3