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3 years ago

I NEED HELP WITH BOTH QUESTIONS PLZZ!!!!!!!!

Chemistry

2 answers:

Norma-Jean [14]3 years ago

6 0

Answer:

Volcanoes erupting

Sea levels rising, glaciers melting

Explanation:

Ion kno bout the second one but I kno the first one is right

Hatshy [7]3 years ago

4 0

2 ,3,and 4 for the second I’m believe

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Good day please help me thank you

NARA [144]

I think c I’m not positive about the question but I think c

6 0

2 years ago

Read 2 more answers

How many moles of oxygen are produced when 29.2 g of water is decomposed according to H20 H2 + O2

Katarina [22]

8.1moles

Explanation:

Given parameters:

Mass of water to be decomposed = 29.2g

Unknown:

Number of moles of oxygen.

Solution:

To solve this problem, we first write the balanced reaction equation :

2H₂O → 2H₂ + O₂

Now convert the given mass of the water to number of moles;

Number of moles of water = $\frac{mass}{molar mass}$

Molar mass of water = 2(1) + 16 = 18g/mol

Number of moles of water = $\frac{29.2}{18}$ = 16.2moles

From the balanced reaction equation:

2 moles of water produced 1 mole of oxygen gas;

16.2 mole of water will produce $\frac{16.2}{2}$ = 8.1moles of oxygen gas

learn more:

Number of moles brainly.com/question/1841136

#learnwithBrainly

5 0

3 years ago

Problem Page A chemist measures the amount of bromine liquid produced during an experiment. He finds that of bromine liquid is p

masha68 [24]

The question is incomplete, here is the complete question:

A chemist measures the amount of bromine liquid produced during an experiment. She finds that 766.g of bromine liquid is produced. Calculate the number of moles of bromine liquid produced. Round your answer to 3 significant digits.

Answer: The amount of liquid bromine produced is 4.79 moles.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

We are given:

Given mass of liquid bromine = 766. g

Molar mass of liquid bromine, $(Br_2)$ = 159.8 g/mol

Putting values in above equation, we get:

$\text{Moles of liquid bromine}=\frac{766.g}{159.8g/mol}=4.79mol$

Hence, the amount of liquid bromine produced is 4.79 moles.

6 0

3 years ago

What is the most corrosive element in the periodic table?

Fittoniya [83]

Answer:

Fluorine is the most corrosive element in the periodic table.

Explanation:

4 0

3 years ago

Read 2 more answers

In a certain electrolysis experiment, 1.24 g of Ag were deposited in one cell (containing an aqueous AgNO3 solution), while 0.65

eduard

Answer:

The correct answer is 169.56 g/mol.

Explanation:

Based on the given information, the mass of Ag deposited is 1.24 g, and the mass of unknown metal X deposited in another cell is 0.650 g. The number of moles of electrons can be determined as,

= 1.24 g Ag * 1mol Ag/107.87 g/mol Ag * 1 mol electron/1 mol Ag ( the molecular mass of Ag is 107.87 g/mol)

= 0.0115 mole of electron

The half cell reaction for the metal X is,

X^3+ (aq) + 3e- = X (s)

From the reaction, it came out that 3 faraday will reduce one mole of X^3+.

The molar mass of X will be,

= 0.650 g/0.0115 *3 mol electron/1 mol

= 56.52 * 3

= 169.56 g/mol

7 0

3 years ago