Bread is made with which fungus? A. morel B. yeast C. mold D. chytrid

Outline the two main observations that led Wegener to propose the theory of continental drift. (in ur own words)

Reil [10]

Answer:

Due to the known fact that certain animal ect lived on certain country/continents due to climate water type ect when fossils of various animal where found in unusual parts of the earth the theory came that all the continent where joined together due to fossil and rock types being found on continents in which would be impossible to reach if not joined together in the beginning

Explanation:

I

3 0

3 years ago

A 1.25-g sample contains some of the very reactive compound al(c6h5)3. on treating the compound with aqueous hcl, 0.951 g of c6h

velikii [3]

83.9% is the weight percent of Al(C6H5)3 in the original 1.25 g sample. First, look up the atomic weights of all elements involved. Atomic weight of Aluminum = 26.981539 Atomic weight of Carbon = 12.0107 Atomic weight of Chlorine = 35.453 Atomic weight of Hydrogen = 1.00794 Now calculate the molar mass of Al(C6H5)3, and C6H6 Molar mass Al(C6H5)3 = 26.981539 + 18 * 12.0107 + 15 * 15.999 = 258.293239 g/mol Molar mass of C6H6 = 6 * 12.0107 + 6 * 1.00794 = 78.11184 g/mol Determine how many moles of C6H6 was produced 0.951 g / 78.11184 g/mol = 0.012174851 mol Since the balanced formula indicates that 3 moles of C6H6 is produced for each mole of Al(C6H5)3 used, divide by 3 to get the number of moles of Al(C6H5)3 that was present. 0.012174851 mol / 3 = 0.004058284 mol Now multiply by the molar mass of Al(C6H5)3 to get the mass of Al(C6H5)3 originally present. 0.004058284 mol * 258.293239 g/mol = 1.048227218 g Finally, divide the mass of Al(C6H5)3 by the total mass of the original sample to get the weight percentage. 1.048227218 g / 1.25 g = 0.838582 Since all our measurements had 3 significant figures, round the result to 3 significant figures, giving 0.839 = 83.9%

4 0

4 years ago

What does an energy flow diagram tell

mestny [16]

Energy can be created but it can’t be destroyed

6 0

3 years ago

What mass of copper could be electroplated on the cathode in an experiment where an average of 200 ma was passed through the cel

Softa [21]

There are 0.138 gram copper could be electroplated on the cathode in an experiment where an average of 200 ma was passed through the cell for 35 minutes .

Calculation ,

Given ; Current passed through copper ( I ) = 200 mA = 200× $10^{-3}$ A

time in second = 35 minutes×60 = 2100 sec

Current ( I )= Q/t

Q =It = 200× $10^{-3}$ A × 2100 sec = 420 C

96500 C of charge = 1 mole

420 C of charge = 1 mole ×420 C/ 96500 C = 0.00435 mol

In , the valancy of Cu is +2 .

2 moles of electron are required for the decomposition of 1 mole of Cu on the cathode .

0.00435 mol of electron are required for the decomposition of Cu = 1mol × 0.00435 mol/2 = 0.002175 mol of Cu

Number of moles of Cu = given mass / molar mass

Mass of Cu = Number of moles of Cu × molar mass = 0.002175 ×63.546

Mass of Cu = 0.138 gram

Therefore , mass of copper is 0.138 gram

To learn more about copper

brainly.com/question/13677872

#SPJ4

5 0

2 years ago

if you push the head of a nail against your skin and then push the point of the same nail against your skin with the same force

ratelena [41]

Answer:

Sure I'll help you!

Explanation:

The head of the nail is flat and isn't sharp enough to cut anything, If you stab someone with a sword then hit them with a shield would it have the same effect? Of course not.

6 0

3 years ago