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lesya [120]
4 years ago
9

who arranged the elements according to atomic mass and used the arrangement to predict the properties of missing elements?

Chemistry
2 answers:
pogonyaev4 years ago
7 0
Dmitri Mendeleev arranged the elements
sesenic [268]4 years ago
3 0

Answer:

Dmitri Mendeleev

Explanation:

google :D

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Meanders are characteristics of a young river. True False
Rainbow [258]
True would be the answer
7 0
3 years ago
) Calculating Heat from Thermochemical Equations
SIZIF [17.4K]

A combustion reaction is a reaction that reacts in the presence of oxygen molecules. Methane will release -3115 kJ/mol of heat.

<h3>What is a combustion reaction?</h3>

A combustion reaction includes the reaction between the chemical reactant and oxygen molecule to produce the product. The combustion reaction between methane and oxygen is given as:

CH₄(g) + 2O₂ (g) → CO₂(g) + 2H₂O (l), ΔH = -890 kJ/mol

The stoichiometry coefficient from the reaction gives 1 mole of methane releases -890 kJ/mol enthalpy.

So, 3.5 moles methane will release = 3.5 × -890 = -3115 kJ/mol

Therefore, -3115 kJ/mol of heat is released.

Learn more about combustion reaction here:

brainly.com/question/27823881

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4 0
2 years ago
___________ reactions form predominately or exclusively one enantiomer. ____________ is the addition of a single oxygen atom to
ArbitrLikvidat [17]

1) <u>Stereo-selective (or enantioselective)</u> reactions form predominately or exclusively one enantiomer.

2) Epoxidation is the addition of a single oxygen atom to an alkene to form an epoxide.

3) <u>Hydrogenation (or reduction)</u> of an alkene forms an alkane by addition of H₂.

4) <u>Dihydroxylation</u> is the addition of two hydroxy groups to a double forming, a 1,2-diol or glycol.

5) <u>oxidative</u> cleavage of an alkene breaks both the σ and π bonds of the double bond to form two carbonyl groups.

6)  <u>Regioselective</u> reactions form predominately or exclusively one constitutional isomer.

7)  <u>Syn</u> dihydroxylation results when an alkene is treated KMnO4 or OsO4, where each reagent adds two oxygen atoms to the same side of the double bond.

7 0
3 years ago
Which mineral group dose copper belong ​
RideAnS [48]

Answer:

Native Elements; Metallic Elements

Explanation:

7 0
3 years ago
How many moles of chlorine gas and 120°C and 33.3 ATM would occupy a vessel of 12 L?
Mashutka [201]
<h3>Answer:</h3>

12.387 moles

<h3>Explanation:</h3>

We are given;

Temperature of chlorine, T = 120°C

But, K = °C + 273.15

Therefore, T = 393.15 K

Pressure, P = 33.3 Atm

Volume, V = 12 L

We are required to calculate the number of moles of chlorine gas,

To find the number of moles we are going to use the ideal gas equation;

PV = nRT

R is the ideal gas constant, 0.082057 L.atm/mol.K

Therefore, rearranging the formula;

n = PV÷RT

Hence;

n = (33.3 atm × 12 L) ÷ (0.082057 × 393.15 K)

  = 12.387 moles

Therefore, the number of moles of chlorine are 12.387 moles

8 0
4 years ago
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