What is the percent composition of aluminum in the ore bauxite (AI2O3)?

Answer:

Structural proteins

Explanation:

Glad I could Help Pls Brainliest

Answer:

Its located on North America

Answer:

2 L

Explanation:

Divide the mass by the concentration to find the volume.

(6 g)/(3g/L) = 2 L

According to the concept of solubility, in order to make solution of sugar the total volume of solution is 2 g/L.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

In order to calculate total volume of solution divide mass/ concentration that is 6/3=2 g/L.

Thus, the total volume of the solution is 2 g/L.

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Answer:

..... yep

Explanation:

tep no yep no hyshshshss

motion results in the kinetic energy of an object

Answer:

C6H12O6

Explanation:

I attached the method for solving above.

Answer:

glucose

Explanation:

plants use sunlight water and the gases in the air to make glucose which is aform of sugar

Answer:

Option A

Explanation:

The atomic number is the number of protons in the nucleus of an atom.

The amount of water needed to prepare a 0.50 molal solution using 0.50 moles of sodium chloride is 1L.

The volume of a solution can be calculated using the following formula:

Volume = no of moles ÷ molarity

According to this question, 0.50 molal solution is used to prepare 0.50 moles of sodium chloride. The volume of the solution is calculated as follows:

Volume = 0.50 moles ÷ 0.5M

Volume = 1L

Therefore, the amount of water needed to prepare a 0.50 molal solution using 0.50 moles of sodium chloride is 1L.

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Answer:

Change in heat (Q) = -1.7316 x 10⁴

Explanation:

Given:

Mass m = 38.68 g

Change in temperature Δt = (197-304) = -107°C

Specific heat C = 4.184 J/g°C

Find:

Change in heat (Q)

Computation:

Change in heat (Q) = (C)(m)(Δt)

Change in heat (Q) = (4.184)(38.68)(-107)

Change in heat (Q) = -1.7316 x 10⁴

Explanation:

The balanced equation of the reaction is given as;

Mg(OH)2 (s) + 2 HBr (aq) → MgBr2 (aq) + 2 H2O (l)

1. How many grams of MgBr2 will be produced from 18.3 grams of HBr?

From the reaction;

2 mol of HBr produces 1 mol of  MgBr2

Converting to masses using;

Mass = Number of moles * Molar mass

Molar mass of HBr = 80.91 g/mol

Molar mass of MgBr2 = 184.113 g/mol

This means;

(2 * 80.91 = 161.82g) of HBr produces (1 * 184.113 = 184.113g) MgBr2

18.3g would produce x

161.82 = 184.113

18.3 = x

x = (184.113 * 18.3 ) / 161.82 = 20.8 g

2. How many moles of H2O will be produced from 18.3 grams of HBr?

Converting the mass to mol;

Number of moles = Mass / Molar mass = 18.3 / 80.91 = 0.226 mol

From the reaction;

2 mol of HBr produces 2 mol of H2O

0.226 mol would produce x

2 =2

0.226 = x

x = 0.226 * 2 / 2 = 0.226 mol

3. How many grams of Mg(OH)2 are needed to completely react with 18.3 grams of HBr?

From the reaction;

2 mol of HBr reacts with 1 mol of Mg(OH)2

18.3g of HBr =  0.226 mol

2 = 1

0.226 = x

x = 0.226 * 1 /2

x = 0.113 mol

Answer:

i think b

Explanation:

Answer:

When cells become damaged or die the body makes new cells to replace them. This process is called cell division. One cell doubles by dividing into two. Two cells become four and so on.

Explanation:

Answer:

Scientific change is: "Any change in the scientific mosaic, i.e. a transition from one accepted theory to another or from one employed method to another. "

Explanation:

Answer:

A. Francium

Explanation:

I'm not for sure but I believe this is correct. Hope it helps:)

Answer:

molar mass of caco3 is

100.0869 g/ mol

Explanation:

Avogadro's number is a very important relationship to remember: 1 mole = 6.022×1023 6.022 × 10 23 atoms, molecules, protons, etc. To convert from moles to atoms, multiply the molar amount by Avogadro's number.

The periodic table brings order to information about the chemical elements. The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties.

Answer:

22.4 L

Explanation:

A gas at STP will possess the following;

Pressure (P) = 1 atm

Temperature (T) = 273K

General gas constant (R) = 0.0821 Latm/molK

Using the general gas law formula to calculate the volume a gas of 1 mol will contain;

PV = nRT

V = nRT/P

V = 1 × 0.0821 × 273 ÷ 1

V = 22.41/1

V = 22.4 litres

Answer:

The given reaction in your problem is the ionic equation for an acid (carbonic acid) reacting with a base (sodium hydroxide). All components of the reaction are then written in ionic form except for reactant weak electrolytes and the driving force product compound of the reaction (H2O). See following explanation.

Explanation:

Metathesis Rxn: molecular equation of rxn      

H₂CO₃(aq) + 2NaOH(aq) => Na₂CO₃(aq) + 2H₂O(l)

Ionic Equation: shows all components of the reaction

H₂CO₃(aq) + 2Na⁺(aq) + 2OH⁻(aq) => 2Na⁺(aq) + CO₃²⁻(aq) + 2H₂O(l)

H₂CO₃(aq)  wk. electrolyte and H₂O(l) driving force compound are not shown ionized in ionic equation. Only strong electrolytes that ionize 100%; i.e., salts and strong acids and bases.

Net Ionic Equation: shows only the reactive components without the spectator ions (nonreactive components), in this case, the Na⁺(aq) ions.

H₂CO₃(aq) + 2OH⁻(aq) =>  CO₃²⁻(aq)  + 2H₂O(l)

Answer:

when the pH increases suddenly in the flask

Explanation:

I think it's right. :)

When the pH increases suddenly in the flask at that point is a base no longer added during a titration.

Titration is a typical quantitative chemical analysis procedure used in laboratories to quantify the concentration of a specified analyte. The titrant or titrator is a reagent that is produced as a standard solution with a known concentration as well as volume.

The pH scale, which originally stood for "potential of hydrogen," is used to describe the acidity as well as basicity of aqueous solutions. The pH of acidic solutions is lower than that of basic as well as alkaline solutions.

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Answer:

37.5 L

Explanation:

Initial Volume, V1 = 15L

Initial Pressure P1 = 4.5 atm

Final Pressure, P2 = 1.8 atm

Final Volume V2 = ?

The relationship between these variables is given as;

P1V1 = P2V2

V2 = PIV1 / P1

Inserting the values;

V2 = 4.5 * 15 / 1.8

V2 = 37.5 L

Answer: The new volume is 37.5L

Explanation:

The question is solved using the principle and formula of a gas law known as the Boyle's law. Boyle's law states that provided the temperature remains constant, the volume of a given mass of gas is inversely proportional to its pressure. Expressing the statement mathematically:

P ∝ 1/V, (where p is equal to pressure and V is volume)

Therefore PV = a constant

If a gas at pressure P1 and Volume V1 changes at constant temperature to pressure P2 and volume V2 then:

P1V1 = P2V2.

Using the formula to solve the question:

P1 = 4.5atm

P2 = 1.8atm

V1= 15L

V2 = ?

V2 = P1V1/P2

V2= 4.5 × 15 /1.8

V2 = 67.5/1.8

V2 = 37.5 L

Therefore the new volume is 37.5L

Answer: W + BgCz2 arrow WCz + Bg

2 W + BgCz2 arrow  2 WCz + Bg

Explanation:

Cz has 2 so you balcne the other side of WCz.

Since you Balcanes the Cz you changed the W and you Balcanes the other W on the left side.