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3 years ago

What is chemical weathering?

Chemistry

1 answer:

tamaranim1 [39]3 years ago

5 0

Answer:

What is chemical weathering? Your answer would be B. Abrasion

What are the three ways chemical weathering occurs? 1. Physical weathering

2. Chemical weathering , 3. Biological weathering

What is oxidation and what does it produce? Cobalt-Oxide produces the colour blue. Hence the name "Cobalt Blue".

What is carbonation and what does it create? The answers are A: It will not make enough food, and C: It will not convert enough CO2 into Glucose.

What is hydration and what does it do? However, lipids are good for storage. Lipids are made up of triglyceride molecules, which are phosphate molecules with 3 long alkyl chains bound to it. Carbohydrate is a biological molecule consisting of carbon (C), hydrogen (H) and oxygen (O).Both Carbohydrates and lipids (fats) are important sources of energy.

In what type of environment is chemical weathering most likely to occur? Chemical weathering happens the most in Tropical climates.

Explanation:

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Calculate the percent yield if 52.9 g of ethanol reacts to produce 26.7 g of ether.

blagie [28]

Answer:

The % yield is 62.7 %

Explanation:

Step 1: the balanced equation

2CH3CH2OH(l) → CH3CH2OCH2CH3(l) + H2O(l)

Step 2: Data given

mass of ethanol = 52.9 grams

molar mass of ethanol = 46.07 g/mol

mass of ether = 26.7 grams

Molar mass of ether = 74.12 g/mol

Step 3: Calculate moles of ethanol

Number of moles = Mass / molar mass

Moles of ethanol = 52.9 grams / 46.07 g/mol

Moles of ethanol = 1.15 moles

Step 4: Calculate moles of ether

For 2 moles of ethanol consumed, we have 1 mole of ether produced

For 1.15 moles of ethanol consumed, we have 1.15/2 = 0.575 moles of ether produced

Step 5: Calculate mass of ether

Mass = moles * Molar mass

Mass ether = 0.575 moles * 74.12 g/mol = 42.62 grams = theoretical yield

Step 6: Calculate % yield

% yield = (26.7 / 42.62) * 100 = 62.7%

The % yield is 62.7 %

6 0

4 years ago

Calculate the number of carbon atoms in 25.0 grams of isopropyl alcohol (c3h8o)

allochka39001 [22]

First, let's determine the number of moles of carbon atoms by using molar mass. Then, using Avogadro's number, we can find the number of C atoms:
*1 mole of C3H8O= (12.0x3)+(1.0x8)+(16.0x1) = 60.0g/mol

25.0 grams C3H8O x (1 mole C3H8O/60.0 grams) = 0.417 mol

0.417mol C3H8O has (3 x 0.417 moles) C atoms = 1.251 moles C atoms

1.251 moles C atoms x(6.022x10^23 atoms/mol) = 9.42x10^23 C atoms.

The answer is in 3 significant figures, as that's what we have in the given, and we matched it with our rounding of the atomic masses from the periodic table.
You can do this all in one equation written left to right, just exclude the intermediate answers. Just easier to show it this way on the computer screen.

7 0

4 years ago

Read 2 more answers

Antimony has 2 stable isotopes 121-sb mass 120.9038 and 123-sb mass 122.9042 amu. calculate the percent abundances of these isot

iragen [17]

The atomic mass of an element is a result of the weighted average of the masses of its corresponding isotopes.

We are given: 
Sb-121: mass of 120.9038 amu, x abundance 
Sb-123: mass of 122.9042 amu, 1-x abundance 

To be able to calculate the atomic mass of antimony, we multiply the percent abundances of the isotopes by their respective atomic masses. Then, we add,

Atomic mass = (Atomic Mass of Sb-121) (% Abundance) + (Atomic Mass of Sb-123) (% Abundance )

121.760 amu = (120.9038 amu)(x) + (122.9042 amu)(1 -x)

Solving for x,
120.9038x + 122.9042 -122.9042x = 121.760
x = 0.57096 or 57.096% 
1-x = 1-0.57096 = 0.42904 or 42.90%

6 0

4 years ago

Which of the following is not a major source of freshwater pollution?

morpeh [17]

Answer:

treated sewage is not a major source of freshwater pollution.

3 0

3 years ago

What is the mass percent of carbon in propanoic acid (C2H5COOH)? (The molar mass of C = 12.01, H = 1.0079, and O = 16.00.)

Yuri [45]

Mass percent is calculated by the ratio of the mass of the substance in a sample over the total mass of the sample multiplied by 100. Assuming 1 mol of the acid, we will have 74.09 g. We do as follows:

% by mass C = 3 ( 12.01) / 74.09 x 100 = 48.63% C

5 0

3 years ago

Read 2 more answers