If you have a density of 3g/ml and volume of 10mL.what is the mass?

Answer:

                     Mass of Sodium  =  574.75 g

                     Mass of Chlorine  =  886.25 g

Explanation:

                   The  balance chemical equation for the synthesis of NaCl is,

                                        2 Na + Cl₂ → 2 NaCl

Step 1: Find out moles of each reactant required,

According to balance chemical equation,

                 2 moles of NaCl is produced by  =  2 moles of Na

So,

         25 moles of NaCl will be produced by  =  X moles of Na

Solving for X,

                     X  =  25 mol × 2 mol /  2 mol

                     X  =  25 moles of Na

Similarly for Cl₂,

According to balance chemical equation,

                 2 moles of NaCl is produced by  =  1 mole of Cl₂

So,

         25 moles of NaCl will be produced by  =  X moles of Cl₂

Solving for X,

                     X  =  25 mol × 1 mol /  2 mol

                     X  =  12.5 moles of Cl₂

Step 2:Convert each moles to mass as;

Mass  =  Moles × Atomic Mass

For Na,

Mass  =  25 mol × 22.99 g/mol

Mass  =  574.75 g

For Cl₂,

Mass  =  12.5 mol × 70.90 g/mol

Mass  =  886.25 g

Mass of Sodium =  574.75 g and Mass of Chlorine =  886.25 g

The  balanced chemical equation for the synthesis of NaCl:

The number of moles can be calculated by dividing given mass over molar mass.

2 Na + Cl₂ → 2 NaCl

Calculation for moles:

2 moles of NaCl is produced by  =  2 moles of Na

So,

25 moles of NaCl will be produced by  =  x moles of Na

Solving for x,

x  =  25 mol × 2 mol /  2 mol

x =  25 moles of Na

Similarly for Cl₂,

2 moles of NaCl is produced by  =  1 mole of Cl₂

So,

25 moles of NaCl will be produced by  =  x moles of Cl₂

Solving for x,

x  =  25 mol × 1 mol /  2 mol

x =  12.5 moles of Cl₂

Conversion of moles from mass:

Mass  =  Moles × Atomic Mass

For Na,

Mass  =  25 mol × 22.99 g/mol

Mass  =  574.75 g

For Cl₂,

Mass  =  12.5 mol × 70.90 g/mol

Mass  =  886.25 g

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Answer:

B. scientific theory

Explanation:

The scientific theory explains the phenomenon observed in the natural world. It is based upon the scientific method. To arrive at the scientific theory a hypothesis is formed, experiments are designed and conducted, resulted evaluated, analyzed and conclusions are reached. scientific theory are based upon experiments that are tested under controlled conditions.

scientific theory

hope this helps :)

The correct answer is option D, that is, protons and neutrons.  

The center of an atom is known as the nucleus, it comprises nucleons, that is, neutrons and protons, and is enveloped by the cloud of electrons. The nucleus exhibits the majority of the mass of the atom in spite of being a very small constituent of the atom. Approximately all the atom's mass is formed of the neutrons and protons in the nucleus with a very small donation from the orbiting electrons.  

So,

There are two basic types of changes in chemistry: physical changes and chemical changes.

Physical changes do not change the chemical identity of the substance; instead physical changes operate between molecules/atoms/ions/etc.  Changes of phase and separation of different substances in a mixture are examples of physical changes.  For example, when you change the phase of liquid water to gas, you are operating between the water molecules by breaking the intermolecular attractions.  Yet you still have water, H2O.  When you separate iron filings from a mixture of sand and iron filings with a magnet, you are, in a way, operating between the atoms of iron.  Yet you still have iron and sand.

Chemical changes change the chemical identity of the substance.  When you throw salt into water, the salt dissolves and is no longer salt.  You get salt water, which is chemically different from water and salt.  You have operated inside the salt compound.

Thus, changing matter from one form to another without a change in chemical properties would be a physical change.

Answer: STP

CaCO3 = 5 g

Convert gram to mol

100 g of CaCO3   = 1 mol

5 g of  CaCO3 (n)  = 5 g *(1 mol/100 g) = 0.05 mol

Gas law  

PV =nRT

V = nRT/P  

V = (0.05 mol * (0.08206 L atm /K mol) *273 K)/1 atm

V = 1.124 L

Explanation:

Final answer:

When 5.0 g of CaCO3 are treated with excess hydrochloric acid, it forms 1.118 L of CO2 gas at STP.

Explanation:

When 5.0 g of CaCO3 is treated with excess hydrochloric acid, it undergoes a chemical reaction and forms CO2 gas. To find the number of liters of CO2 formed at STP (standard temperature and pressure), we need to use the ideal gas law. The molar mass of CaCO3 is 100.09 g/mol, and 1 mol of CaCO3 produces 1 mol of CO2 gas. The volume of 1 mol of any gas at STP is 22.4 L. Therefore, we can calculate the number of moles of CaCO3, then convert it to moles of CO2 and finally to the volume of CO2 gas in liters.

Using the given information, we have:
Mass of CaCO3 = 5.0 g
Molar mass of CaCO3 = 100.09 g/mol
Moles of CaCO3 = Mass of CaCO3 / Molar mass of CaCO3
Moles of CO2 = Moles of CaCO3
Volume of CO2 at STP = Moles of CO2 * 22.4 L/mol

Plugging in the values, we get:
Moles of CaCO3 = 5.0 g / 100.09 g/mol = 0.04997 mol
Moles of CO2 = 0.04997 mol
Volume of CO2 at STP = 0.04997 mol * 22.4 L/mol = 1.118 L

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