4.13 moles of chromium (III) nitride weighs how much?

Answer:

By adding water stirring

Explanation:

Answer:

C₆H₆

Explanation:

From the question given above, the following data were obtained:

Empirical formula = CH

Molar mass of compound = 78 g/mol

Molecular formula =?

The formula of the compound can be obtained as follow:

Molecular formula = n × Empirical formula

Molecular formula = ₙ[CH]

n[CH] = 78

n[12 + 2] = 78

14n = 78

Divide both side by side 14

n = 78/14

n = 6

Molecular formula = ₙ[CH]

Molecular formula = ₆[CH]

Molecular formula = C₆H₆

Thus, the molecular formula of the compound is C₆H₆

Answer:

Thermal energy refers to several distinct physical concepts, such as the internal energy of a system; heat or sensible heat, which are defined as types of energy transfer; or for the characteristic energy of a degree of freedom in a thermal system, where is temperature and is the Boltzmann constant

Explanation:

Its empirical formula : C₅H₁₂O₆

The empirical formula is the smallest comparison of atoms of compound forming elements.  

(empirical formula) n = molecular formula  

The principle of determining empirical formula and molecular formula  

Ar C = 12 g/mol

Ar H = 1 g/mol

Ar O = 16 g/mol

mol ratio of C : H : O =

[tex]\tt \dfrac{36.36}{12}\div \dfrac{7.13}{1}\div \dfrac{56.51}{16}\\\\3.03\div 7.13\div 3.53\rightarrow divided~by~smallest(3.03)\\\\1\div 2.4\div 1.2(\times 10)\rightarrow 5\div 12\div 6[/tex]

Answer:

Explanation:

It is 1.

Answer:

2Al + 5 Br2-----> 2AlBr3 + 2Br2

Explanation:

Answer:

The answer is c, i just got it right on my test

Explanation:

stay safe!

Traditionally they include boron from group 3A, silicon and germanium in group 4A, aresnic and antimony in group 5A and tellurium from group 6A, although sometimes selenium, astatine, polonium and even bismuth have also been considered as metalloids. Typically metalloids are brittle and show a semi-metallic luster.

The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. Five elements are less frequently so classified: carbon, aluminium, selenium, polonium, and astatine.

Answer:

The heart is pumping more blood throughout your body

Explanation:

Answer:

Mendeleev

Explanation:

Answer:

lose protons and form ions

Explanation:

I thjink hope this helps

PLease mark brainliest

Answer:

The correct option is C

Explanation:

The structural model of C₃H₈ is that of option C.

In Structural model which can also be known as structural formula, the atoms of a molecule or compound are identified by the location of chemical bonds that exists between them. A structural formula is seen to consist of symbols. In this case, the atoms are connected by short lines. These short lines actually represent their chemical bonds. Where one, two, or three lines that  connect each element that make up the compound stands for single, double, or triple bonds, respectively.

Answer:

C

Explanation:

Answer:

0.206 mol H₂O₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

7.00 moles H₂O₂

Step 2: Identify Conversions

Molar Mass of H - 1.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H₂O₂ - 2(1.01) + 2(16.00) = 34.02 g/mol

Step 3: Convert

[tex]7.00 \ g \ H_2O_2(\frac{1 \ mol \ H_2O_2}{34.02 \ g \ H_2O_2} )[/tex] = 0.205761 mol H₂O₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

0.205761 mol H₂O₂ ≈ 0.206 mol H₂O₂

Answer:

238.14

Explanation:

2 H + 2O

2(1.01) + 2(16.00) = 34.02

34.02*7 = 238.14

238.14

Answer:

Last one

Explanation:

Answer:

39.9g is the maximum mass of copper sulfate which could be produced

Explanation:

1 mole of Copper oxide, CuO contains 1 mole of Cu

In the same way, 1 mole of sulfuric acid, H₂SO₄, contains 1 mole of sulfate ion, SO₄²⁻.

Thus we can understand that there are 0.250moles of Cu and 0.500 moles of SO₄²⁻ to produce CuSO₄.

The maximum moles that could be produced are 0.250 moles (Copper is limiting reactant).

To convert these moles to mass we use the relative formula mass:

0.250 moles CuSO₄ * (159.5g/mol) =

Answer: It's easier for sodium to lose an electron because it has one valence electron whereas aluminum three valence electrons. It's easier for sodium in the other two examples as well because of the valance electrons and because it is very reactive with most elements because it really wants to get rid of the extra electron n the valance shell.

Covalent bond is a type of chemical bond which is due to the sharing an electron from each and every atom that is participating in the bond.

Ionic bond is a type of bond which is formed due to the complete donation of an electron from one atom to another.

Ionic bond is formed between metals and non-metals. The group which provide the Metal are IA and IIA i.e. S block elements. The group which mostly provide non-metal is VII A i.e. halogens. The Metals give up their ONLY Valance shell electron which is accepted by the Non-metal. This results in formation of ions, The Metals gets the positive charge thus called cation and The non-metal gets a negative charge thus called anion. These Positive and Negative ion attract each other resulting in the formation of IONIC BOND.

The Ionic bond is formed between The metal and non metal because, the metals have low ionization energy due to which the valence shell is ejected out easily, and The Non-Metals have high electron affinity which means that  they attract an electron with greater force because they need one electron to complete their octet. As the non metal has high electron affinity and metal have low electron affinity thus the electronegativity difference between the non metal and metal is more than 2 thus they make ionic bond.

Electronegativity is the tendency of an atom to attract shared pair of electron. If there is electronegativity difference between the two atom more than 2 then it makes IONIC BOND. If the electronegativity difference is less than 2, it makes COVALENT BOND.

The question says, the KCl has ionic bond but HCl has covalent bond, why?

Answer is that KCl has electronegativity difference between K and Cl atom more than 2 thus it forms ionic bond. H and Cl has electronegativity difference of less than 2 thus it makes Covalent Bond. K donates its valence electron completely to the Chlorine atom because chlorine has much more electronegativity than potassium(K). H shares an electron with chlorine, it is not completely donated. H has pair of electron for sometime and chlorine has pair of electron for sometime, It is because the Chlorine and Hydrogen has less difference of electronegativity so they attract with almost same electronegativity.

Answer:

B

P

K

Explanation:

K: 203pm

B: 84pm

P: 107pm

There isn't an E on the Periodic Table?!

Answer:

10.6

Explanation:

10,604 in other words not in a decimal

There are 10.6 moles of calcium in 425 g of calcium.

Given to us is the mass of calcium which is 425 g, we also know the molar mass of the calcium which is 40.08 g/mol

To calculate the number of moles in a given mass of a substance, you need to divide the mass by the molar mass of the substance.

Using this information, we can calculate the number of moles of calcium in 425 grams:

Number of moles = Mass (g) / Molar mass (g/mol)

Number of moles = 425 g / 40.08 g/mol

Number of moles ≈ 10.61 mol

Therefore, there are approximately 10.61 moles of calcium in 425 grams.

Learn more about the mole concept here:

https://brainly.com/question/22540912

#SPJ 2

Answer:

D

Explanation:

Because when you combine chemical substances they create a new substance unlike physical substances .

Answer:

D- A new substance forms with different properties​

Explanation:

When a chemical change occurs, it causes the matter to form into a completely new substance. Because of this, the new substance will have different properties than the original substance. Options B and C are true for some chemical changes, but not all changes. Option A is incorrect because the substance has different properties than the original substance. Thus, Option D is correct.

- I took the quiz and got 100%

Hope this helps!

Answer:

H+ and NO3- ions

Explanation:

The Pb²+ ions react with the SO4²‐ ions to form a solid precipitate, i.e. they bond together and undergo a phase change;

On the contrary, the H+ and NO3- ions are aqueous ions before the reaction and the same after the reaction, i.e. they don't change;

Hence, the H+ and NO3- ions are spectator ions

The way to do this type of question is to consider what changes and what doesn't, look at phase changes and oxidation state changes

Answer:

It goes the crust mantle outer core and inner core. The crust is what we are standing on it has dirt, rock, stone, the mantle it has lots of silicate rocks and magnesium. The outer core has liquid nickel and iron and the inner core has solid metals

Mantle and core layers are present underneath Earth's surface.

The land underneath Earth's surface has mantle, outer core and inner core. The surface of the earth is the crust which is solid and hard. This surface of earth becomes hard due to cooling of the surface with the help of environmental conditions.

Mantle layer of earth has high temperature than crust whereas the inner and outer core is more hotter than mantle where all the materials are present in liquid state so we can say that inside the earth mantle and core layers are present.

Learn more: https://brainly.com/question/19750748

Answer:

No

Explanation:

If Teresa has a $100 Gift Card and her lunch is $8.50 everyday, $8.50 x 10 = 10 Lunchs for a total of $85 then add one more which = 11 Lunchs for a total of 93.50, this means she can not buy another lunch, Colin has a $75 gift card and his lunch is $6 everyday, so $6 x 10 = $60 for a total of 10 lunchs plus add 2 which is 12 lunchs for a total of $72 which means No Teresa's Gift Card Will Not Be Greater In Lunchs.

Answer:

last choice

Explanation:

oxidation and reduction can be defined in terms of adding or removing oxygen to a compound

oxidation is gaining oxygen

reduction is to loss oxygen

Answer:

is what a model answer key

I am going to go with yes. Imao

Answer:

31 protons

37 Neutrons

^68 Ga

Explanation:

I don’t know the second part, but I’m guessing 37 because 37+31=68

Answer:

The molar mass of Fe2O3 is 159.7 g/mol.