2. Find the molar mass for:
FeCl2 • 5H20

Answer:

No of moles = mass in gram / molar mass

Mass in gram = no of moles× molar mass

Mass in gram = 0.6330× 163.94

103.77 gram

Explanation:

Answer:

[tex]\boxed {\boxed {\sf About \ 2.96 \ moles \ of \ Argon}}[/tex]

Explanation:

To convert from grams to moles we must use the molar mass, which is found on the Periodic Table.

Use the molar mass as a ratio.

[tex]\frac{39.9 \ g \ Ar}{1 \ mol \ Ar}[/tex]

Multiply by the given number of grams: 118

[tex]118 \ g \ Ar *\frac{39.9 \ g \ Ar}{1 \ mol \ Ar}[/tex]

Flip the fraction so the grams of argon will cancel each other out.

[tex]118 \ g\ Ar * \frac{1 \ mol \ Ar}{39.9 \ g \ Ar}[/tex]

[tex]118 * \frac{ 1 \ mol \ Ar}{39.9 \ g \ Ar}[/tex]

[tex]\frac {118 \ mol \ Ar }{ 39.9 }[/tex]

[tex]2.95739348 \ mol \ Ar[/tex]

The original measurement of grams had 3 significant figures, so our answer must have 3 sig figs.

For the number we calculated, that is the hundredth place. The 7 in the thousandth place tells us to round the 5 to a 6.

[tex]2.96 \ mol \ Ar[/tex]

There are about 2.96 moles of Argon in 118 grams.

Explanation:

Single displacement (replacement) is kind of reaction in which 1 atom of reactants only change in product.

answer: bits of rock rusting when exposed to oxygen and water

Explanation: i think because when it rains the water is left and freezes and night making the rock expand or start to Rust

Answer: 6H2+P4–>4PH3

Explanation:

Answer:

Bromine fluoride

Answer:

Bacteria can evolve quickly because they reproduce at a fast rate.

Explanation:

Bacteria can evolve quickly because they reproduce at a fast rate. Mutations in the DNA of bacteria can produce new characteristics. A random mutation might cause some bacteria to become resistant to certain antibiotics, such as penicillin.

Answer:

Since hydrogen is the first element, its electron configuration is 1s1.

Explanation:

It has only one electron in its valence shell.

Valence electrons are the outermost electrons or electrons in the largest energy level. Hydrogen has only one electron, so that electron is a valence electron.

Answer:

One valence electron !!

Explanation:

Answer:

solute and solvent

Explanation:

Because solutes dissolves in solvent to form a solution

Answer:

c

Explanation:

Answer:

C. electrons. They also have a charge of -1

gram of NO=5

2NO = 2N+O2

2×2.50=x

x=5

The mass of nitrogen monoxide  produced from 2.5 grams of oxygen is 1.875 grams

4NH₃ + 50₂ → 4NO + 6H₂0

The limiting reagent is 0₂ because the least moles of this are used in the reaction.

Therefore, it will determine the amount of product formed.

From the chemical reaction above

10(16) g of 0₂ gives (4×14 + 4×16) g of NO

2.50 g of 0₂ will give ? of NO

cross multiply

mass of NO formed = 2.50 × 120 / 160

mass of NO formed = 300 / 160

mass of NO formed = 1.875 grams

learn more on mass here: https://brainly.com/question/14269180

Explanation:

20g of Na and 10g of Cl2 which is in excess?

The equation of the reaction is given as;

2 Na + Cl2  --> 2 NaCl

From the equation;

2 mol of Na reacts with 1 mol of Cl2

Converting the masses of reactants given to mol

Number of moles = Mass / Molar mass

Na;

Number of moles = 20 / 23 = 0.8696 mol

Cl2;

Number of moles = 10 / 71 = 0.1408 mol

In the chemical equation, the ratio was 2: 1 however with the masses, we can tell that Na is in by far excess.

0.8696 mol of Na would require 0.4348 of Cl2 (Present = 0.1408 mol)

This means;

Na - Excess Reactant

Cl2 - Limiting Reactant

Second part; How much NaCl would be produced?

The limiting reactant determines how much of the product is formed.

From the equation of the reactant;

1 mol of Cl2 produces 2 mol of NaCl

0.1408 mol of Cl2 would require x mol of NaCl

1  = 2

0.1408 = x

x = 0.2816 mol of NaCl

Converting to mass;

Mass = Molar Mass * Number of moles

Mass = 58.44 g/mol * 0.2816 mol

Mass = 16.46 g

Answer:

Q = 5805 Joules.

Explanation:

Given the following data;

Mass = 2250g

Specific heat capacity of silver = 0.129 J/g·°C

Initial temperature, T1 = 0.0°C

Final temperature, T2 = 200.0°C

To find the quantity of heat needed;

Heat capacity is given by the formula;

[tex] Q = mcdt[/tex]

Where;

dt = T2 - T1

dt = 200 - 0

dt = 200°C

Substituting the values into the equation, we have;

[tex] Q = 225*0.129*200[/tex]

Q = 5805 Joules.

Therefore, the amount of heat needed is 5805 Joules.

Given values:

                                                      [tex]= 200-0[/tex]

                                                      [tex]= 200^{\circ} C[/tex]

As we know the formula,

→ Heat capacity, [tex]Q = mcdt[/tex]

By substituting the values, we get

                                [tex]= 225\times 0.129\times 200[/tex]

                                [tex]= 5805 \ Joule s[/tex]

Thus the above answer is right.

Learn more about heat here:

https://brainly.com/question/20846683

Answer:

Land plants are also known as Embryophytes. Embryophytes are complex multicellular eukaryotes with specialized reproductive organs. The name derives from their innovative characteristic of nurturing the young embryo sporophyte during the early stages of its multicellular development within the tissues of the parent gametophyte.

Explanation:

Answer:

there used for mountains , wait I'm just trynna get points ya feel me

Explanation:

Answer: equal to

Explanation:

Question :

Answer:

False, because:

Thermal conduction is defined as the transport of energy due to random molecular motion across a temperature gradient. It is distinguished from energy transport by convection and molecular work in that it does not involve macroscopic flows or work-performing internal stresses.

Or in other words, Conduction is the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.

If this helped, you're welcome! If you would, please make me brainliest.

- niaxfandoms (ig and yt)

You are looking for an element in the fourth period and a transition metal. As most have about 3 valence electrons. Gallium and Scandium work perfectly.

Answer:

Gallium is the Answer.

Explanation:

Answer:

these are all types of rocks

sedimentary are formed through the accumalation of different material from earths surface. Like the grand Canyon!

Metamorphic rocks are formed from heat, preasure, or a combination. Found mostly near tectonic plates meet.

Igneous are molten rock.

Explanation:

Sedimentary- a rock that has formed from sediment deposited by water or air

Metamorphic- a rock that has transformed by heat,pressure,or other natural causes

Igneous- a rock that has been solidified by lava or magma

Answer:

The type of galaxy that is described as revolving around a single point and has spinning arms of stars which extend from the center is;

Spiral

Explanation:

A spiral galaxy which is the most common type of galaxy is a class of Hubble sequence of galaxies which was described in the 1936 work The Realm of the Nebulae by Edwin Hubble

Spiral galaxies are therefore have a flat disk shape such that the stars, the dusts, and the gas that make up the galaxy cluster in several radially spreading spiral arms that come together in the galaxy center

Answer:

Spiral

Explanation:

Answer:

c. F

Explanation:

As you go top to bottom down a column of the periodic table, atomic radius increases.

As you go left to right across a period of the periodic table, atomic radius decreases.

Knowing this trend, that means that the smallest atomic radius would be located in the top right of the periodic table. The closest element to that point is fluorine, or answer C.

Answer:

8.0 moles

Explanation:

Answer:

nucleus and electrons

Explanation:

nucleus contains protons and neutrons

your answer would be sound energy

Explanation:

my brain

Answer:

Two Electrons.

Explanation:

Strontium is the atom with atomic number 38, and electron configuration is [Kr] 5S^2 which mean just two electrons more than Krypton which one of the Noble gases.