What is a good example of food waste that can be added to compost?
O oil
O chicken breast
O eggshells
Oyogurt

Answer:

Explanation:

the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.

the total number of protons and neutrons in a nucleus.

to write the symbol for an isotope, place the atomic number as a subscript and the mass number (protons plus neutrons) as a superscript to the left of the atomic symbol

Answer:

KOH is limiting reactant

Explanation:

To solve this question, we need to convert the mass of each reactant to moles. Then, using the balanced reaction, we can find the limiting reactant:

Moles S -Molar mass: 32g/mol-:

14g S * (1mol / 32g) = 0.44mol

Moles O₂ -Molar mass: 32g/mol-:

24g O₂ * (1mol / 32g) = 0.75mol

Moles KOH -Molar mass: 56g/mol-:

28g KOH * (1mol / 56g) = 0.5mol

For a complete reaction of the KOH are required:

0.5mol KOH * (2mol S / 4mol KOH) = 0.25mol S

0.5mol KOH * (3mol O₂ / 4mol KOH) = 0.38mol O₂

As there are 0.44 moles of S and 0.38moles of oxygen,

Answer:

3.16mL of glacial acetic acid must be added

Explanation:

The mixture of acetic acid with sodium acetate produce a buffer. The buffer follows the H-H equation:

pH = pKa + log [A⁻] / [HA]

Where pH is the pH of the buffer: 5.0

pKa is pKa of the buffer = 4.74

[A⁻] could be taken as moles of acetate ion = 0.500L * (0.20mol/L) = 0.100mol

And [HA] are moles of acetic acid.

Replacing:

5.0 = 4.74 + log [0.100mol] / [HA]

0.26 = log [0.100mol] / [HA]

1.8197 = [0.100mol] / [HA]

[HA] = 0.100mol / 1.8197

[HA] = 0.05495 moles of acetic acid

As the glacial acetic acid is 17.4M, the volume we must add to prepare the buffer is:

0.05495 mol * (1L / 17.4mol) = 3.16x10⁻³L =

Answer:

the normality of the given solution is 0.0755 N

Explanation:

The computation of the normality of the given solution is shown below:

Here we have to realize the two sodiums ions per carbonate ion i.e.

N = 0.321g Na_2CO_3 × (1mol ÷ 105.99g)×(2eq ÷ 1mol)

= 0.1886eq ÷ 0.2500L

= 0.0755 N

Hence, the normality of the given solution is 0.0755 N

Answer:

See explanation

Explanation:

Dehydration of an alcohol by E1 mechanism occurs in two steps. The first step is the is the protonation of the -OH group in the alcohol followed by the elimination of water, a good leaving group.

In the case of  2,3‑dimethylpentan‑3‑ol, the carbocation formed undergoes rearrangement followed by loss of a hydrogen atom. This now yields the product as shown in the image attached.

Note that, the Zaitsev's product is the most substituted product and is most stable hence it is the most favored product.

Answer:

the median is 14 the range is 15 the mode is 14 and the mean is 12.7

Explanation:

for the median you put all numbers is order but least to greatest and figure out the middle number for range you take the smallest and the biggest number and subtract them for mode you use the most repeated number and for the mean you add all the numbers and divide by the total of numbers I hope this helped

Answer:

d because ur heating the ice and causing friction

Answer:

Examples of permineralization

Most dinosaur bones are permineralized. Petrified wood: Permineralization is the first step in petrification.

Answer: you didn’t put any picture of any answers to pick but example of permineralization fossils would be dinosaur remains and wood

Answer: Goldfish. :p

Explanation:

Answer:

2928kg of ore are required.

2585kg of the 80% H₂SO₄ solution are required.

Explanation:

To solve this question we need first to find the moles of titanium in 1000kg of TiO₂. Keeping in mind the 89% of descomposition we can find the mass of the ore and the mass of the 80% sulfuric acid required:

Moles TiO₂ -Molar mass: 79.866g/mol-:

1x10⁶g * (1mol / 79.866g) = 12521 moles Titanium

In mass -Molar mass Ti: 47.867g/mol-:

12521 moles Titanium * (47.867g / mol) = 599341.4g of Ti.

As the ore contains 24.3% of Ti:

599341.4g of Ti = 599.34kg Ti * (100 / 24.3) = 2606kg ore

As the descomposition is just of 89%:

2606kg ore * (100 / 89) =

Mass 80% sulfuric acid:

12521 moles Titanium = 12521 moles H₂SO₄ * (100/89) = 14068.5 moles of H₂SO₄ are required.

In an excess of 50% =

14068.5 moles of H₂SO₄ are required * 1.5 = 21102.8 moles of H₂SO₄.

The mass is:

21102.8 moles of H₂SO₄ * (98g / mol) = 2068075g = 2068kg of sulfuric acid

That is in the 80%:

2068kg of sulfuric acid * (100/ 80) =

2771.53 kg of titanium ore and 2584.63 kg of 80% H₂SO₄ are required to produce 1000 kg of pure TiO2.

The moles of titanium in 1000 kg of TiO₂ is first determined:

mass of TiO₂ = 1000 kg = 1 * 10⁶g

moles of TiO₂ = 1 * 10⁶g/79.88 g/mol

moles of TiO₂ = 12518.77 moles

1 mole of TiO₂ produces 1 mole of titanium

12518.77 moles TiO₂ produces 12518.77 moles of titanium

mass of titanium = number of moles * molar mass

mass of titanium = 12518.77 moles * 47.88 g/mol

mass of titanium = 599398.70 g

Since the percentage mass of titanium in the ore is 24.3%

mass of ore  = 599399.18 g * 100/24.3

mass of ore = 2466661.31 g

mass of ore in kg = 2466.66 kg

Since only 89% of ore decomposed, mass of ore required = 2466.66 kg *100/89

mass of ore required = 2771.52

Mass 80% sulfuric acid required is calculated as follows:

Therefore, 12521 moles Titanium = 12521 moles H₂SO₄

Since only 89% of the ore decomposes;

moles of H₂SO₄ required = 12518.77 moles * 100/89

moles of H₂SO₄ required = 14066.03 moles

moles of H₂SO₄ supplied = 14066.03 moles * 150/100

moles of H₂SO₄ supplied = 21099. 04 moles

mass of H₂SO₄ supplied = 21099. 04 moles * 98 g/mol

mass of H₂SO₄ supplied = 2067702 g

mass of 80% H₂SO₄ required = 2067702 g * 100/80

mass of 80% H₂SO₄ required = 2584627.5 g

mass of 80% H₂SO₄ required in kg = 2584.63 kg

Therefore, 2771.53 kg of ore and 2584.63 kg of 80% H₂SO₄ are required to produce 1000 kg of pure TiO2.

Learn more about purification of ores and sulfuric acid at: https://brainly.com/question/947373

Answer:

2.25 moles of Cu(NO₃)₂.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Cu + 2HNO₃ —> Cu(NO₃)₂ + H₂

From the balanced equation above,

2 moles of HNO₃ reacted to produce 1 mole of Cu(NO₃)₂.

Finally, we shall determine the number of mole of Cu(NO₃)₂ produced by the reaction of 4.5 moles of HNO₃. This can be obtained as follow:

From the balanced equation above,

2 moles of HNO₃ reacted to produce 1 mole of Cu(NO₃)₂.

Therefore, 4.5 moles of HNO₃ will react to produce = 2.25 moles of Cu(NO₃)₂.

Thus, 2.25 moles of Cu(NO₃)₂ were obtained from the reaction.

Answer:

(Kc)^2

Explanation:

For this reaction 4 A⇌ 2B Kc is (Kc)∧².

The equilibrium constant is the value of the reaction quotient that is calculated from the expression for chemical equilibrium. A thermodynamic equilibrium constant, denoted by , is defined to be the value of the reaction quotient Qt when forward and reverse reactions occur at the same rate. At chemical equilibrium, the chemical composition of the mixture does not change with time and the Gibbs free energy change. Stability constants, formation constants, binding constants, association constants and dissociation constants are all types of equilibrium constants.

Learn more about equilibrium constant, refer:

https://brainly.com/question/28045045

#SPJ2

Answer:

B

Explanation:

The chemical formula will be Mg[tex]_3[/tex]P[tex]_2[/tex]. Therefore, the correct option is option B among all the given options.

Using atomic symbols with numerical subscripts, a chemical equation is indeed a notation used by chemists to indicate the total amount and kind of atoms contained in some kind of a molecule. A written chemical equation is a straightforward illustration of an actual, three-dimensional molecule.

The precise atoms that make up a material are described in its chemical formula. The chemical equation, the molecular formula, as well as the structural formula are the three fundamental types of chemical formulas. The chemical formula will be  Mg[tex]_3[/tex]P[tex]_2[/tex].

Therefore, the correct option is option B.

To know more about chemical formula, here:

https://brainly.com/question/29031056

#SPJ2

Answer:

e = Mc hammer.

Explanation:

Answer:

1. Yes, no, no

2. No, yes, no

3. Yes, Yes, No

Explanation:

Three states of matter exist – solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume.

Answer:

Explanation:

Ok so for the first row I believe is Yes, No, No

Second row  No, yes, No

last row i dont know

I hope this helped

(p.s I have't done this in a couple of months so it might be wrong and i am so sorry if it is.)

Answer:

OH⁻

Explanation:

Hydroxide is represented as OH⁻, since it is specifically the oxygen atomic that is specifically connected to a central metal ion of Fe, never hydrogen, which means that it could be represented as OH⁻.

OH⁻ is the chemical formula for hydroxide, since it is specifically the oxygen atomic that is specifically connected to a central metal ion of Fe, never hydrogen, which means that it could be represented as OH⁻.

A chemical formula is a way to describe the chemical ratios of the atoms that make up a specific chemical compound or molecule in chemistry. Chemical element numbers, symbols, and on occasion other symbols, including parentheses, dashes, brackets, commas, and plus (+) and minus () signs, are used to represent the chemical elements. Which may also include subscripts or superscripts. Since a chemical formula inherently wordless, it cannot be considered a chemical name. A chemical formula does not equal a complete chemical structural formula, despite the fact that it may suggest certain basic chemical structures. Hydroxide is represented as OH⁻.

To know more about chemical formula, here:

brainly.com/question/32018188

#SPJ6

Answer: a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]

acid : hydronium ion

base : methoxide ion

conjugate acid : methanol

conjugate base: water

b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]

acid : hydrogen chloride

base : ethoxide ion

conjugate acid : ethanol

conjugate base: chloride ion

c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]

acid : methanol

base : amide ion

conjugate acid : ammonia

conjugate base: methoxide ion

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

The species accepting a proton is considered as a base and after accepting a proton, it forms a conjugate acid.

The species losing a proton is considered as an acid and after loosing a proton, it forms a conjugate base

For the given chemical equation:

a) [tex]H_3O^++CH_3O^-\rightleftharpoons CH_3OH+H_2O[/tex]

acid : hydronium ion

base : methoxide ion

conjugate acid : methanol

conjugate base: water

b) [tex]CH_3CH_2O^-+HCl\rightleftharpoons CH_3CH_2OH+Cl^-[/tex]

acid : hydrogen chloride

base : ethoxide ion

conjugate acid : ethanol

conjugate base: chloride ion

c) [tex]NH_2^-+CH_3OH\rightleftharpoons NH_3+CH_3O^-[/tex]

acid : methanol

base : amide ion

conjugate acid : ammonia

conjugate base: methoxide ion

.

Answer:

0.966g of sodium benzoate are in the original sample

Explanation:

The sodium benzoate, B⁻, reacts with HCl as follows:

B⁻ + HCl → BH + Cl⁻

Where 1 mole of benzoate reacts per mole of HCl

The HCl is added in excess. We can find the HCl that reacts with sodium benzoate using the NaOH that reacts with HCl.

When 1 drop change the pH in 1,1 units, this point is the equivalence point. Thus, moles in excess of HCl = Moles of NaOH added are:

0.04650L * (0.393mol / L) = 0.0183 moles NaOH = Moles HCl in excess

Moles HCl added:

0.0500L * (0.500mol/L) = 0.0250 moles HCl added

Moles HCl that react = Moles Sodium benzoate:

0.0250 moles HCl - 0.0183 moles HCl = 0.0067 moles HCl = Moles Sodium benzoate

Mass Sodium benzoate -Molar mass: 144.11g/mol-:

0.0067 moles Sodium benzoate * (144.11g/mol) =

Answer:

2

Explanation:

1) the formula of the energy is:

E=cm*Δt, where E - the value of the energy (5480 J.), c - the specific heat capacity (4200 J/(kg*C)), Δt - the difference between initial temperature and the final one (it is unknown);

2) if to perform the substitution of the values 'E', 'm' and 'c' into the formula above, then

5480=4200*0.65*Δt;

3) to calculate Δt:

Δt=5480/4200/0.65≈2 (°C).

note: the initial temperature is higher than the final.

Answer:

Carbon monoxide is a very important industrial compound. In the form of producer gas or water gas.

hope ths help and if you want more information go to this website: science.jrank.org

Answer:what’s the question?

Explanation:

Answer:

0.0967kg

Explanation:

1 mol = 46.0684 g

2.1 mol = 46.0684 × 2.1 = 96.74364 g

1000 g = 1 kg

96.74364 g = 96.74364/1000 = 0.0967kg

Answer:

b

Explanation:

Answer:

A. Is a recipe for soing science

Explanation:

A scientific method is a procedure for conducting science experiments, its almost like a recipe for a science experiment.

Answer:

5.0 g

Explanation:

Step 1: Write the balanced equation

FeCl₂ + 2 Na⁺ = 2 NaCl + Fe²⁺

Step 2: Calculate the moles corresponding to 5.4 g of FeCl₂

The molar mass of FeCl₂ is 126.75 g/mol.

5.4 g × 1 mol/126.75 g = 0.043 mol

Step 3: Calculate the moles of NaCl produced from 0.043 moles of FeCl₂

The molar ratio of FeCl₂ to NaCl is 1:2. The moles of NaCl produced are 2/1 × 0.043 mol = 0.086 mol.

Step 4: Calculate the mass corresponding to 0.086 moles of NaCl

The molar mass of NaCl is 58.44 g/mol.

0.086 mol × 58.44 g/mol = 5.0 g

Answer:

See explanation below

Explanation:

First of all, we need to know the molecule that need to be synthesized. In the first picture attached, we have the molecule.

Now, according to that, the molecule can be formed in two ways. Both ways are rather different but we have one thing in common in both ways, and it's the fact that both ways requires the reaction with an alkyne. In one way, with the higher MW and the other with the lowest.

For the first way, when we need to use the higher MW, all we need to do is to put the triple bond in the highest molecule, in this case, a molecule that include the benzene ring, and the other reactant will be the alkyl bromide. You can see the picture of this product below, (Picture 2).

For the second way, the triple bond should be located in the lowest MW, in this case an ethyl group, instead of the benzene ring, and the molecule with the benzene ring would have the bromide. In both cases we will have the same product. See picture 2 for this.

Hope this helps

Answer:Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

Explanation:

Answer:

the answer is heterotrophs