Which of these are part of the
Earth's lithosphere?

O clouds
O glaciers
O mountains
O water vapor

3.21 grams of Aluminum Sulfate are got when 4 g of Aluminum Nitrate reacts chemcially with 3 g of Sodium Sulfate.

The equation given is not balanced. Thus,  when balanced the equation becomes:

2 Al(NO₃)₃ + 3 Na₂SO₄ → Al₂(SO₄)₃ + 6 NaNO₃

The molar mass of Al(NO₃)₃ is:

Al(NO₃)₃ = 1(Al) + 3(N) + 9(O) = 213 g/mol

The molar mass of Na₂SO₄ is:

Na₂SO₄ = 2(Na) + 1(S) + 4(O) = 142 g/mol

From the balanced equation, we can see that 2 moles of Al(NO₃)₃ react with 3 moles of Na2SO4 to produce 1 mole of Al₂(SO₄)₃. Therefore, we can calculate the number of moles of Al(NO₃)₃ and Na₂SO₄ that react:

Number of moles of Al(NO₃)₃ = 4 g / 213 g/mol = 0.0188 mol

Number of moles of Na₂SO₄ = 3 g / 142 g/mol = 0.0211 mol

From the balanced equation, we can see that 2 moles of Al(NO₃)₃ produce 1 mole of Al₂(SO₄)₃. Therefore, the number of moles of Al₂(SO₄)₃ produced is:

Number of moles of Al₂(SO₄)₃ = 0.0188 mol / 2 * 1 = 0.0094 mol

The molar mass of Aluminum Sulfate (Al₂(SO₄)₃) is:

Al₂(SO₄)₃ = 2(Al) + 3(S) + 12(O) = 342 g/mol

Therefore, the mass of Aluminum Sulfate produced is:

Mass of Al₂(SO₄)₃ = Number of moles of Al₂(SO₄)₃ * Molar mass of Al₂(SO₄)₃

= 0.0094 mol * 342 g/mol

= 3.21 g

Hence, 3.21 grams of Aluminum Sulfate are liberated when 4 g of Aluminum Nitrate change state with 3 g of Sodium Sulfate.

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Answer:

FeCl₃ . 6H₂O, BRAINLIST PLZ

Explanation:

1) The chemical formula of iron(III) chloride is FeCl₃ (the oxidation number of Fe is 3+, and the oxidation number of Cl is 1-).

2) The formula that you are lookin for the hydrate is of the type FeCl₃ . n H₂O, where n is the number of water molecules per each unit formula of Fe₂O₃.

3) Find the mass of anhydrous FeCl₃ by difference:

mass of FeCl₃ = mass of the sample - mass of the water in the sample

mass of FeCl₃ = 5.49g - 2.20 g = 3.29 g

4) Convert the mass of FeCl₃ in number of moles

number of moles = mass in grams / molar mass

molar mass of FeCl₃ = 55.845 g/mol + 3×35.453 g/mol = 162.204 g/mol

number of moles = 3.29 g / 162.204 g/mol = 0.0203 mol FeCl₃

5) Convert the mass of water in number of moles:

molar mass of water = 18.015 g/mol

number of moles of water = mass in grams / molar mass = 2.20 g / 18.015 g/mol = 0.122 moles H₂O

6) Find the mole ratio of water to iron chloride:

0.122 mol water / 0.0203 mol iron chloride = 6.01 ≈ 6

Therefore, the complete formula of the hydrate is FeCl₃ . 6H₂O,

Answer:

Compound

Explanation:

SiO2 is silicon dioxide which is a compound.

Answer:

b) Adding 0.075 moles of HCl

Explanation:

A buffer is defined as the aqueous mixture of a weak acid and its conjugate base or vice versa (Weak base with its conjugate acid).

The buffer of the problem is the acetic acid / lithium acetate.

The addition of any moles of the acid and the conjugate base will not destroy the buffer, just would change the pH of the buffer. Thus, a and c will not destroy the buffer.

The addition of an acid (HCl) or a base (NaOH), produce the following reactions:

HCl + LiC₂H₃O₂ → HC₂H₃O₂ + LiCl

The acid reacts with the conjugate base to produce the weak acid.

And:

NaOH + HC₂H₃O₂  →NaC₂H₃O₂ + H₂O

The base reacts with the weak acid to produce conjugate base.

As the buffer is 1.0L, the moles of the species of the buffer are:

HC₂H₃O₂ = 0.300 moles

LiC₂H₃O₂ = 0.045 moles

The reaction of HCl with LiC₂H₃O₂ consume all LiC₂H₃O₂ -because there are an excess of moles of HCl that react with all LiC₂H₃O₂-

As you will have just HC₂H₃O₂ after the reaction, the addition of b destroy the buffer.

In the other way, 0.0500 moles of NaOH react with the HC₂H₃O₂ but not consuming all HC₂H₃O₂, thus d doesn't destroy the buffer.

Answer:

9.93712g

Explanation:

You have 10mL of water at 33 degrees, so you want to look at the density of water at 33 degrees. Then you multiply that density (.993712) by 10 and the mL cancel out and you are left with 9.93712g.

Hope this helps!

Answer:

$474.30

Explanation:

23.25 × 102 = 2371.5 (total amount of money produced from pallets)

2371.5/5 = 474.3 (payout per worker)

Answer:

5H2 + 4NO = 2N2 +4H2O + H2

Explanation:

Reactants:

Five molecules that contains two hydrogen = 5H2

Four molecules that contains one nitrogen and one oxygen = 4NO

Products:

Two molecules that contains two nitrogen = 2N2

Four molecules that contains one oxygen and two hydrogen = H2O

One molecules that contains two hydrogen = 1H2 or H2

The balanced chemical equation for the reaction will be: 5 H₂ + 4 NO → 2 N₂ + 4 H₂O + H₂, and there is no limiting reactant in this reaction.

To write the balanced chemical equation for the reaction, let's first identify the reactants and products based on the information provided:

Reactants:

5 molecules contain 2 white spheres (Hydrogen): 5 H₂

4 molecules contain 1 red (Oxygen) and 1 blue (Nitrogen) sphere: 4 NO

Products:

2 molecules contain 2 blue spheres (Nitrogen): 2 N₂

4 molecules contain 1 red (Oxygen) and 2 white (Hydrogen) spheres: 4 H₂O

1 molecule contains 2 white spheres (Hydrogen): 1 H₂

Now, let's write the balanced chemical equation by ensuring that the number of atoms of each element is the same on both sides of the equation:

Reactants: 5 H₂ + 4 NO

Products: 2 N₂ + 4 H₂O + 1 H₂

The balanced chemical equation for the reaction is:

5 H₂ + 4 NO → 2 N₂ + 4 H₂O + H₂

Now, let's determine the limiting reactant:

From the balanced equation, we can see that the stoichiometric ratio between H₂ and NO is 5:4. This means that for every 5 molecules of H₂, we need 4 molecules of NO for the reaction to proceed completely.

Since we have 5 molecules of H₂ and 4 molecules of NO, both reactants are present in the exact stoichiometric ratio required for the reaction. Therefore, neither H₂ nor NO is in excess, and both will be fully consumed during the reaction. As a result, there is no limiting reactant in this reaction.

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--The given question is incomplete, the complete question is

"Oxygen is represented by a red sphere. Nitrogen is represented by a blue sphere. Hydrogen is represented by a white sphere. In the reactants there are five molecules that contain two white spheres and four molecules that contains one red and one blue sphere. In the products there are two molecules that contain two blue spheres, four molecules that contain one red and two white spheres, and one molecule that contains two white spheres. What is the chemical formula for the limiting reactant in the reaction shown? chemical formula: Write the balanced chemical equation for the reaction, using lowest whole-number coefficients."--

Answer:

D) It is a solid

Explanation:

Answer:

correct option is (a)

The solution would be using this: C6H5COOH = H+ + C6H5COO Ka = 6.5 x 10^-5 = (H+)(C6H5COO-) over

(C6H5COOH)

Let X = moles per liter (H+) and also = moles per liter (C6H5COO-)

Ka = 6.5 x 10^-5 = (X)(X) over .350 molar = acid solution 6.5 x 10^-5 = X^2 over .350

X^2 = 6.5 x 10^-5 times .350 which = 2.275 x 10^-5

x = V2.275 x 10^-5

X = 1.5083 x 10^-5 moles per liter H+

pH = -log(H+) = -log 1.5083 x 10^-5 which

= 4.6215

The pH of a 0.350 M aqueous benzoic acid solution is 4.64. The correct option is a).

In chemistry, the pH scale is used to define the acidity or basicity of an aqueous solution. Historically, pH stood for "potential of hydrogen."

The solution would be using this: C₆H₅COOH = H+ + C₆H₅COO Ka = 6.5 x 10⁻⁵ = (H+)(C₆H₅COO-) over

(C₆H₅COOH)

Let X = moles per liter (H+) and also = moles per liter (C6H5COO-)

Ka = 6.5 x 10⁻⁵ = (X)(X) over .350 molar = acid solution 6.5 x 10⁻⁵= X² over .350

X² = 6.5 x 10⁻⁵ times .350 which = 2.275 x 10⁻⁵

x = V2.275 x 10⁻⁵

X = 1.5083 x 10⁻⁵ moles per liter H+

pH = -log(H+) = -log 1.5083 x 10⁻⁵  = 4.6215

Therefore, the pH is 4.6215. The correct option is a). round to 4.64.

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Answer: As the fertilizers enter the water systems, they cause an explosion of growth by algae and aquatic plants. When the organisms die they are decomposed by microbes that quickly deplete the oxygen in water, killing animals such as fish and shellfish.

Explanation: Excess fertilizers lead to "eutrophication".

Urinary tract infection is the most common nosocomial infection in patients admitted to the hospital. Surgical site wound infections, bacteremia, and gastrointestinal and skin infections are among the most common nosocomial infections.

A hospital-acquired infection, also known as a nosocomial infection, occurs in a hospital or other healthcare setting. It is sometimes referred to as a healthcare-associated infection to emphasize both hospital and nonhospital settings.

Nosocomial infections, also known as healthcare-associated infections (HAI), are infections acquired while receiving healthcare that was not present at the time of admission.

Healthcare-Acquired Infections (HAIs), also known as Healthcare-Associated Infections, are infections contracted while receiving treatment at a healthcare facility, such as a hospital, or from a healthcare professional, such as a doctor or nurse.

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Answer:

1.A lantern has a candle or fuel cell which heats the air and this hot air fills the sky lantern. The consequence of this is that the lantern rises in the air. This happens because the hot air inside the lantern is lighter than the cool air surrounding it. ... This fuel cell is lit before the lantern is launche

2.Whenever something becomes warmer, the kinetic energy of its atoms or molecules has increased. When matter gets warmer, the atoms or molecules in the matter move faster. It's easy to increase the kinetic energy in matter.

Answer:

2 NH₃(g) + 2 O₂(g) ⇒ N₂O(g) + 3 H₂O(l)   ΔH° = -684 kJ

Explanation:

Let's consider the unbalanced equation that occurs when NH₃(g) reacts with O₂(g) to form N₂O(g) and H₂O(l).

NH₃(g) + O₂(g) ⇒ N₂O(g) + H₂O(l)

We will begin balancing N atoms by multiplying NH₃(g) by 2.

2 NH₃(g) + O₂(g) ⇒ N₂O(g) + H₂O(l)

Then, we will balance H atoms by multiplying H₂O(l) by 3.

2 NH₃(g) + O₂(g) ⇒ N₂O(g) + 3 H₂O(l)

Finally, we will get the balanced equation by multiplying O₂(g) by 2.

2 NH₃(g) + 2 O₂(g) ⇒ N₂O(g) + 3 H₂O(l)

Since 342 kJ of energy are evolved for each mole of NH₃(g), and there are 2 moles of NH₃(g) in the balanced equation, the heat evolved will be2 × 342 kJ = 684 kJ. By convention, when heat is evolved, it takes a negative sign. The balanced thermochemical equation is:

2 NH₃(g) + 2 O₂(g) ⇒ N₂O(g) + 3 H₂O(l)   ΔH° = -684 kJ

The balanced equation for the redox reaction between zinc and hydrochloric acid (HCl) that forms zinc(II) ions and hydrogen gas is as follows:

Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g)

A redox reaction is a type of chemical reaction in which some of the atoms have their oxidation number changed.

According to this question, the redox reaction between zinc and hydrochloric acid (HCl) forms zinc(II) ions and hydrogen gas. The balanced equation is as follows:

Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g)

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Answer:

B, (logic) D (knowledge)

Explanation:

Problem solving refers to the ability to figure out an answer to a question. The question can be general, such as how to design an experiment, or it can be more specific, such as how to calculate speed (its distance divided by time). Reasoning is closely related to problem solving. When scientists reason, they use logic and knowledge to make conclusions and decisions. The processes of reasoning and problem solving are usually more educational than the answer. Figuring something out is a wonderful workout for your brain.

(got this from the source)

Hope this helps!!!

The amount, in mL, of the suspension that should be given to an infant weighing 17 lb will be 1.16 mL

0.8 mL of the liquid contains 80.0 mg of the drug.

The recommended dose is 15 mg per kg of body weight

The infant to be given the drug weighs 17 lb.

First, let's convert the weight of the infant to kg.

1 lb = 453.59 g

17 lb =       453.59 x 17/1

                   = 7711.03 g

1000 g = 1 kg

7711.03 g = 7711.03 x 1/1000

               = 7.711 kg

So, the baby's weight is 7.711 kg.

The drug dose for the baby can thus be calculated as:

15 mg x 7.711 = 115.67 mg

But 0.8 mL of the drug contains only 80.0 mg. How many mL will contain 115.67 mg?

                   0.8 x 115.67/ 80.0 = 1.16 mL

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1) He was born on February 8, 1834

2) He was born in Tobolsk, Russia

3) Mendeleev arranged the elements in order of increasing relative atomic mass.

4) Gallium, germanium, and scandium

5) He died on February 2, 1907

6) Protons (positive charge) and neutrons (neutral charge)

Answer:

Explanation:

I did the lab

The amount of 0.110 M sulfuric acid are required to neutralize exactly 25.0 mL of 0.0840 M NH3 solution is 9.55mL.

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products. H+ ions and OH- ions combine to generate water during a neutralisation process.

2 NH3(aq) + H₂SO4 (aq) → (NH4)2SO4(aq)

moles of NH3 = (25ml x 1L/1000mL) x 0.084M

=> 2.1x 10^(-3) moles

The mole ratio of NH3 to H₂SO4 in the given reaction

=> moles of H₂SO4 = 2.1 x 10^(-3) moles of NH3 x 1 molesH₂SO4/2 moles

                                                                                                                  NH3

=> 1.05 x 10^(-3) moles

Volume = moles/molarity

=> 1.05  10^(-3) moles/0.110M

=> 9.55 x 10^(-3) L = 9.55mL

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Answer:

Explanation:

Combined Gas Law

T2= T1P2V2/ (P1V1) = 348.15 X .5 X 3.4/(2 X 7.5) =39.46 K or -233.69C

Answer:

\(Y=48.6\%\)

Explanation:

Hello,

In this case, we can consider the following chemical reaction for the oxidation of copper which only occurs at high temperatures:

\(2Cu+O_2\rightarrow 2CuO\)

In such a way, for 0.032 grams of copper, the following grams of copper (II) oxide (black product) are yielded:

\(m_{CuO}=0.032gCu*\frac{1molCu}{63.546gCu} *\frac{2molCuO}{2molCu}*\frac{79.546gCuO}{1molCuO} =0.078gCuO\)

Therefore, the percent yield is:

\(Y=\frac{0.038g}{0.078g}*100\%\\ \\Y=48.6\%\)

Best regards.

Answer: Industrial processes including mining and manufacturing historically have been leading causes of soil pollution. Industrial areas typically have much higher levels of trace elements and organic contaminants. This is due to intentional and unintentional releases from industrial processes directly into the environment, including to the soil, adjacent water bodies, and the atmosphere.

Explanation:

Answer: As they develop theories, chemists use models to attempt to explain their findings. Chemists assess the model they are using as new evidence becomes available and, if required, continue to refine it by making modifications.

Explanation:

Answer:

a. 80 g ⟶ 40 g ⟶ 20 g ⟶ 10 g ⟶ 5 g …

b. 0 da ⟶ 8 da ⟶ 16 da ⟶ 24 da ⟶ 32 da …

c. 8 da

Explanation:

Assume that the decay curve looks like the first one below.

a. Mass of I

The mass of iodine decreases by half after each half-life.

Thus, the masses decrease in the sequence

80 g ⟶ 40 g ⟶ 20 g ⟶ 10 g ⟶ 5 g …

b. Time

The horizontal axis has repeating units every 8 da.

Thus, the time increases in the sequence

0 da ⟶ 8 da ⟶ 16 da ⟶ 24 da ⟶ 32 da …

The completed graph is the second one below.

c. Half-life

It takes 8 da for 80 g of iodine to decrease to 40 g.

The half-life of iodine is 8 da.

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

Answer:

When iron wool combusts, it reacts with oxygen from the air to form iron oxide. Iron oxide is a solid, so the oxygen atoms from the air add to the mass on the balance. The balance tips as the iron wool reacts with the oxygen to form solid iron oxide. from.

Explanation:

Answer:

you tell me

Explanation:

Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

THANKS

IF THE ANSWER IS CORRECT , THEN MARK ME AS BRAINLIST

Solar atomic refers to an atomic watch that is a type of radio-controlled wristwatch that tells time by monitoring the resonance frequency.

An atomic watch is consistently serialized by receiving radio signals from atomic clocks. As a result, They exhibit the time correctly and do not need battery change to operate flawlessly. These special watches come in various styles, and sizes, and plan for men and women, making them appealing to everyone.

Because solar watches are always recharging their batteries, they reliably tell time with unparalleled correctness with many solar watches vastly exceeding their atomic timekeeping, quartz, mechanical, and automatic complement.

So we can conclude that atomic watches are the most error-free watches there are on the market.

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