Burning 1.0 kg of anthracite coal releases 30,500 kJ of heat. Calculate the mass of coal required to heat 4.0 kg of water from 20ºC to its boiling point of 100ºC. (Specific heat capacity of water = 4.184 J/g°C)

A. 26.4 g
B. 112 g
C. 43.9 g
D. 37.1 g
E. 72.7 g
F. 16.2 g

Each sentence about the bioavailability of minerals in foods should be completed with either increases or decreases as follows:

Nutrients can be defined as the chemical compounds (substances) or minerals that are present in food, and they are needed by the body of a living organism for healthy growth, reproduction, development, proper functioning, and reproduction.

In Science, there are five (5) main classes of nutrients and these include the following:

In conclusion, phytic acid, oxalic acid, and refinement of grains are factors that decrease the bioavailability of minerals in foods while Vitamin C and Vitamin D increases the bioavailability of minerals in foods.

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it is already balanced

REACTANTS

Barium sulfide (BaS) + platinum (Ii) fluoride

PRODUCT

Barium fluoride (BaF2) + Cooperite (PtS)

Hope this answer helps you dear! take care

Answer:

= 9.6125M

Explanation:

data:

volume = 800ml

              800/ 1000 = 0.8dm^3

molar mass of NaCl = 23 + 35.5

                                  = 58.5g

mass of NaCl = 450 g

moles= ?

molarity = ?

solution:

no. of moles = \(\frac{given mass}{molar mass}\)

                      = 450 / 58.5

                     = 7.69 moles

now, molarity = \(\frac{moles}{volume in dm^3}\)

                       = 7.69 / 0.8

         molarity= 9.6125 M

Answer:

C. aquifer

Explanation:

I just did a lesson on this

:)

Answer:

its 4

Explanation:

Answer:

4 is the answer

Explanation:

2 fingers plus 2 fingers is 4 fingers, Not 1,250

Answer:

C. Gas

Explanation:

Answer:

22.6 percent

Explanation:

Nitrate is one part nitrogen plus three parts oxygen so nitrogen only makes up about 22.6 percent on the nitrate ion.

Answer: 22.6%

Explanation: sorry if im wrong

Answer: B) 2 (as indicated by electron distribution shown), but taking into account the real properties of this element, 4,7,8 also occur (see below).

Explanation:

This is the electron complement/atomic number of ruthenium, which actually has the structure [Kr] 5s1 4d7

Nevertheless, Ru does not form Ru(I) compounds and few Ru(II) compounds (RuCl2, RuBr2, RuI2). It also forms Ru(III)Cl3 and a larger number of Ru(IV) compounds, e.g. RuO2, RuS2. It also forms RuO4

The limiting and excess reactant can be obtained as follow:

2Mg + O₂ -> 2MgO

From the balanced equation above,

48 g of Mg reacted with 32 g of O₂

Therefore,

62.1 g of Mg will react with = (62.1 × 32) / 48 = 41.4 g of O₂

We can see from the above that only 41.4 g of O₂ is required to react completely with 62.1 g of Mg.

Thus, the limiting reactant is magnesium, Mg and the excess reactant is oxygen, O₂

The mass of the excess reactant remaining can be obtained as shown below:

Mass of excess reactant remaining = Mass given - mass reacted

Mass of excess reactant remaining = 100 - 41.4

Mass of excess reactant remaining = 58.6 g

The mass of H₂SO₄ produced can be obtained as illustrated below:

Mg + O₂ -> 2MgO

From the balanced equation above,

48 g of Mg reacted to produce 80 g of MgO

Therefore,

62.1 g of Mg will react to produce = (62.1 × 80) / 48 = 103.5 g of MgO

Thus, the mass of product, MgO produced is 103.5 g

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Complete question:

If 62.1 grams of magnesium react with 100.0 grams of oxygen, how many grams of product are produced?

Which is the Limiting reactant?

Which is the Excess reactant?

How many grams of excess reactant remain?

Gas has a molecular volume of 22.4 litres at 273 K and 1 atm. The answer to the given question is 1 atm, 1 mol, and 273°C, or 546K.

STP is frequently used when calculating gas properties, like gas density. The standard pressure is 1 atm, and the standard temperature is 273 K (0° Celsius or 32° Fahrenheit). At atp equal at sea level, this is the freezing point of pure water.

Charles' law is defined as follows, and this is how we might express the equation for Charles' law: The initial volume and temperature, V1 and T1, are equal to V2 and T2, respectively.

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Answer:

1. 2,3-dimethyl butane

2. 3-ethyl,4-methyl pent-1-yne

3. 2,4- dimethyl hexane

4. 3,4- diethyl 5methyl hex-2-ene

5. 3-ethyl, 2-methyl but-2-ene

6. 4methyl pent-2-yne

Answer:

yes

Explanation:

So the balanced equation is 2 Mg + O 2 2 MgO.. ... Example: 2Mg + O2 -> 2MgO Magnesium and oxygen combine to form the compound magnesium oxide.

Thus, to balance the O2 we put a 2 in front of the MgO. However, now there are 2 Mg's in the products and only one Mg in the reactants. To balance the Mg we then put a 2 in front of the Mg in the reactant. All atoms are now balanced in the reaction

Answer:

Yes.

Explanation:

Oxygen has 2 atoms, and so does Magnesium.

Hope this helped! Have a good night!

According to the stimulation, if the bulk of the plants is the same, there will be no change.

Planets have varying masses because they are formed of diverse materials, and their mass dictates their thickness and thinness.

The weight of an item is determined by its mass and the strength with which gravity pulls on it. The strength of gravity is proportional to the distance between two objects. As a result, the same thing weights differently on various planets.

The mass indicates the influence of gravity as well as the density of the atmosphere. If the masses are the same, all planets will be the same size, and many will be incapable of supporting life.

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Answer:

C. Response to environment

Answer:

Boyle's Law, Charles' Law, and Gay-Lussac's Law

Explanation:

Answer:

Boyle's Law, Charles's Law, and Gay-Lussac's Law

Explanation:

The net ionic equation of the reaction is as follows:

4 Al3+(aq) + 12 NO3-(aq) + 3 Ag(s) = 4 Al(s) + 12 Ag+(aq) + 12 NO3-(aq)

Ions which remain in their ground state and do not take part in the reaction are called spectator ions. The net ionic equation cancels out these ions, which are present on both the reactant and product sides of the equation.

Spectator ions, which can be found on both the reactant and product sides, but are not included in the finished reaction from the net ionic equation. The \(NO^3^-\) ions are spectator ions in this example, thus taking them out of the equation. The net ionic equation makes up the rest of the species.

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Answer:

X2Y4–6Z8O20 (OH, F)4

Explanation:

The chemical formula for micas is X2Y4–6Z8O20 (OH, F)4, where X is K, Na, or Ca or less commonly Ba, Rb, or Cs; Y is Al, Mg, or Fe or less commonly Mn, Cr, Ti, Li, etc.; Z is chiefly Si or Al, but also may include Fe3+ or Ti1. Structurally, micas can be classed as dioctahedral (Y = 4) and trioctahedral (Y = 6)1.

The chemical formula for micas varies, but they typically have the general formula:

(K,Na,Ba,Rb,Ca)(Al,Mg,Fe)2(Si3Al)O10(OH,F)2

Where:

So in summary, micas have a layered aluminosilicate structure with interlayer cations that can vary, but they are generally characterized by an approximate 3:1 ratio of silicon to aluminum within the silica tetrahedral sheets. The chemical formula given is the generalized structural formula for micas, but the actual compositions can vary based on the specific mica.

, we need to use the chemical formula of ammonium acetate, which is NH4C2H3O2. First, we need to calculate the molar mass of ammonium acetate: Molar mass of NH4C2H3O2 = (1 x 14.01 g/mol) + (4 x 1.01 g/mol) + (2 x 12.01 g/mol) + (3 x 16.00 g/mol) = 77.08 g/mol Next, we can use the molar mass to convert 63.3 g of ammonium acetate to moles: 63.3 g NH4C2H3O2 x (1 mol NH4C2H3O2 / 77.08 g NH4C2H3O2) = 0.820 mol NH

The solubility of\(LaF_3\) in water is 3.04 x 10^-6 mol/L.

The solubility of \(LaF_3\) in water can be determined using the Ksp expression:

\(Ksp = [La^{3+}][F^-]^3\)

Where \([La^{3+}]\)and \([F^-]\) are the molar concentrations of the \(La^{3+}\) and \(F^-\) ions in the solution.

Since each \(LaF_3\) formula unit dissociates into one \(La^{3+}\) ion and three \(F^-\) ions, the molar solubility of \(LaF_3\) can be represented as x. Thus, the molar concentrations of \(La^{3+}\) and \(F^-\) ions in the solution can be written as x and 3x, respectively.

Substituting these values into the Ksp expression gives:

Ksp = x*(3x)^3 = 27x^4

Now, we can solve for x:

x = (Ksp/27)^(1/4)

= (2 x 10^-19 / 27)^(1/4)

= 3.04 x 10^-6 mol/L

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Answer: If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapor as it gets warmer.

The water particles in a pot of boiling water are behaving very differently from the water particles in the steam above the pot.

The water particles in the pot are tightly packed together. They are constantly moving, but they are not free to move around as much as the water particles in the steam.

The water particles in the steam are much farther apart. They are also moving much faster than the water particles in the pot. This is because the steam has been heated to the boiling point, which means that the water molecules have enough energy to escape from the liquid state and become a gas.

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we dont know that were waiting in too

Answer:

• The Na atom is formed when the Na+ ion gains an electron.

• A Na+ ion has 10 electrons and a Na atom has 11 electrons.

• A sodium atom has one more electron shell than a sodium ion.

• A Na+ ion is formed when a Na atom loses an electron

Answer: the answer is A.

Explanation:

Bailee explained that when traveling to the moon  mass of the objects is which changes when the gravitational pull changes. Bailee is incorrect. Both the mass and weight will change. Option C is correct.

Mass is the physical quantity of any substance or object and weight is the measurement of amount of force acting on a particulate body of the mass.

At the moon both the  mass and weight is divided by 6 means the  mass and weight is six times lighter then the expected  mass and weight on earth.

Therefore, Bailee is incorrect. Both the mass and weight will change. Option C is correct. which changes when the gravitational pull changes

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Answer:

Nuclear power has a slower rate because the nuclear waste produced is not radioactive and thus cannot be used further as a fuel. Geothermal has a slower rate because the average temperature of the core of Earth is gradually lowering, Geothermal energy has a faster rate because there is a continuous flux of heat from Earth's core.

Explanation:

C

Answer:

Cementation

Explanation:

Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at the Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place :)

Answer:

Coal

Explanation:

Coal is formed from plants trapped in dust and dirt for a long time, so coal would fit plant material, and it also takes a long time to make coal, that's why it will run out at some point

The largest effect on the population of trout in Wisconsin was caused by the introduction of non-native species into the ecosystem.

The introduction of non-native species into an ecosystem can cause a disruption in the food chain, leading to a decrease in the population of native species. In Wisconsin, the introduction of non-native species such as the brown trout and rainbow trout has had a significant impact on the population of native brook trout.

The non-native species compete with the native brook trout for food and habitat, which has led to a decrease in the brook trout population. This highlights the importance of preserving the natural balance of ecosystems and avoiding the introduction of non-native species.

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(a) The number of moles of Ag⁺ that reacted is 0.05 mmoles and moles of Cl- that reacted is 0.05 mmoles.

(b) The number of moles of AgCl(s) formed is 0.05 moles

(c) The molarity of Ag⁺ after the reaction = 0.0 M

(d) The molarity of NO₃⁻ after the reaction is 0.25 M

The number of moles of Ag and Cl- that reacted is calculated as follows from the equation of the reaction:

AgNO₃ (aq) + NaCl (aq) ---> AgCl (s) + NaNO₃ (aq)

(a) The number of moles of Ag and Cl- that reacted:

Moles of Ag⁺ = 0.5 * 0.1

Moles of Ag⁺ = 0.05 mmoles

Moles of Ag⁺ that reacted = 0.05 mmoles

Moles of Cl⁻ = 0.5 * 0.1

Moles of Cl⁻ = 0.05 mmoles

Moles of Cl⁻ that reacted = 0.05 mmoles

(b) The number of moles of AgCl(s) formed.

Moles of AgCl that formed = 0.05 moles

(c) Since there are no more Ag⁺ ions in the mixture, the molarity of Ag⁺ after the reaction = 0 moles

(d) The molarity of NO₃⁻ after the reaction.

Moles of NO₃⁻ = 0.5 * 0.1

Moles of NO₃⁻ = 0.05 moles

Volume of mixture = 0.2 mL

The molarity of NO₃⁻ after the reaction = 0.05/0.2

The molarity of NO₃⁻ after the reaction = 0.25 M

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Answer:

it is a soft and very cold molocules but at the touch of a hand it will melt because of how compact the molocules are

Explanation:

gallium can only stay a solid under 85.59°F so is someone had is in there had is would end up like ice cream

Option D - They are negatively charged and located outside the nucleus is the correct alternative.

We have electrons.

We have to determine which of the given statements are true about electrons.

An electron is a negatively charged subatomic particle that can be either bound to an atom or free (not bound).

According to the question -

The role of electrons inside the atom is as follows -

Hence, Option D is the correct alternative.

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Answer:

101 g

Explanation:

M(O2) = 2g*16.0 = 32.0 g/ mol

M(MgO) = 24.3 + 16.0 = 40.3 g/mol

                                   2 Mg          + O2            →      2MgO

from reaction                               1 mol                  2 mol

from reaction                    1 mol*32.0 g/mol            2 mol*40.3 g/mol

given                                          40 g                        x g

1 mol*32.0 g/mol     ---       2 mol*40.3 g/mol

            40 g          ---              x g

x = (40*2*40.3)/(1*32.0) = 100.75 g ≈ 101 g

Answer:

see the pic for more detail