Someone help it’s due today

Answer:

3.98g

Explanation:

Given parameters:

Number of molecules = 1.2 x 10²⁴ molecules

Unknown:

Mass of H₂   = ?

Solution:

To find the mass of this molecule, we use the expression below:

    Mass  = number of moles x molar mass

Molar mass of H₂ = 2(1)  = 2g/mol

          6.02 x 10²³ molecules are contained in 1 mole of a substance

So;    1.2 x 10²⁴ molecules will  have [tex]\frac{1.2 x 10^{24} }{6.02 x 10^{23} }[/tex]    = 1.99 moles of H₂

Mass of H₂   = 1.99 x 2  = 3.98g

Answer:

salt will form bcz when acids reacts with base then it forms salts . and this reaction is called neutralization reaction

Answer:

Situation 7, also thats funny you were playing nurses office. I like that song. Hope this helped!

Answer:

Answer:

The mole ratio of C₄H₁₀ and CO₂ is 2 : 8, which  simplifies to 1 : 4.

Explanation:

The mole ratio is the relative proportion of the moles of products or reactants that participate in the reaction according to the chemical equation.

The chemical equation given is:

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

Once you check that the equation is balanced, you can set the mole ratios for all the reactants and products. The coefficients used in front of each reactant and product, in the balanced chemical equation, tells the mole ratios.

In this case, they are: 2 mol C₄H₁₀ :  13 mol O₂ : 8 mol CO₂ : 10 mol H₂O

Since you are asked about the mole ratio of C₄H₁₀ and CO₂ it is:

2 mol C₄H₁₀ : 8 mol CO₂ , which dividing by 2, simplifies to

1 mol C₄H₁₀ : 4 mol CO₂, or

1 : 2.

Explanation:

Answer:

the answer is three 3

......

Answer:

Average atomic mass of E = 103.57 amu

Explanation:

Given data:

Average atomic mass of E = ?

Abundance of E-102.658 = 56.67%

Abundance of E-104.770 = 43.33%

Solution:

Average atomic mass of E = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  / 100

Average atomic mass of E = (56.67×102.658)+(43.33×104.770) /100

Average atomic mass of E =  5817.63 + 4539.68 / 100

Average atomic mass of E = 10357.31 / 100

Average atomic mass of E = 103.57 amu.

Answer:

A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Explanation:

Answer:

D

Explanation: d

Answer:

547g

Hope i could help ;)

Answer:

the second stage of cell division. its between prophase and anaphase during the chromosomes become attached to spindle fibers.

Answer:

b. a meadow replacing a pond in it's flood plain

Explanation:

I'ts a secondary succession.

The number of moles = 0.5

Given

3.01 x 10²³ atoms Cu

Required

moles

Solution

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

Input the value :

n = N : No

n = 3.01 x 10²³ :  6.02.10²³

n = 0.5

Answer:

The answer I believe is B. Erosion

Explanation:

Just sounds better than all the other choices.

Answer:

erosion b

Explanation:

it breaks down the rocks i remembered this in 4th grade :)

Answer:

the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).

Answer:

abcdefghijklmnopqrstuvwxyz

Explanation:

I pooped the bed last night when I farted

95.21 g/mol

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Identify

MgCl₂

Step 2: Find Formula Weight

[PT] Molar Mass of Mg - 24.31 g/mol

[PT] Molar Mass of Cl - 35.45 g/mol

Molar Mass of MgCl₂ - 24.31 + 2(35.45) = 95.21 g/mol

Answer:

Explanation:

Answer:

27,21 g

Explanation:

molair mass of H2O2 = 34,0147 g/mol

0,8 mol x 34,0147 g/mol = 27,21 g

Answer:

Chromium is a chemical element with symbol Cr and atomic number 24. Classified as a transition metal, Chromium is a solid at room temperature

Explanation:

Hope it help

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THANKS

Answer:

drought

Explanation:

because it looses all of the water in the aria / desertification

Answer:

2h+02=h20

Explanation:

2 in front of h on left side

2 in front of h on right side

Answer:

Explanation:

1. __1___ Fe + __1___ S → __1___ FeS. 2. __1___ H2 + __1___ Cl2 → __2___ HCl. 3. __2___ Mg + __1___ O2 → __2___ MgO. 4. __1___ O2 + __2___ H2

2 covalent bonds

2 pairs or 4 electrons

Atoms are combining to form molecules

Answer:

1.39  × 10²³ molecules  of CaCl₂

Explanation:

Given data:

Number of moles of CaCl₂ = 0.23 mol

Number of molecules = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

0.23 mol × 6.022 × 10²³ molecules  / 1mol

1.39  × 10²³ molecules  

Answer: answer A

Explanation: because it gives more detail and a summarizations

Answer:

-6.51

Explanation:

Multiply 1.86 x 2 x 1.74 and then you get your answer.

Answer:

As the molality increases by 1 m, there is a corresponding decrease of 1.86°C in the solution’s freezing point.

Explanation:

Anser on EDge

Answer:

i wish i know

Explanation:

Answer:

Magnesium hydroxide has 3 unique elements.

Explanation:

Long story short, 2 is the balancing compound in structure to make up hydroxide, therefore 1 compound would be left to create Mg(2O)H.

(This is only an opinion of mathematical science to me, I don't have complete understanding of this subject either, good luck.)