CHEMISTRY HIGH SCHOOL

Please help ASAP ty :)
please help ASAP ty :) - 1

Answers

Answer 1
Answer:

Answer:

c or d it measures smallest to biggest and biggest to smallest
Answer 2
Answer:

Answer:

your answer is a

Explanation:

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2NaCl + H2SO4 --> 2HCl + Na2SO4How many grams of HCl can be prepared from 2.00 mol H2SO4 and 2.56 mol NaCl?a. 7.30 gb. 93.3 gc. 146 gd. 150 ge. 196 g
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Need help ASAP . Anybody ? - 20 points
All isomers of octane have the same(1) molecular formula (3) physical properties (2) structural formula (4) IUPAC name

Why is large scale nuclear fission a rare phenomenon on earth ?

Answers

Answer:

The correct answer is option C.

Explanation:

The radioisotopes in the Earth's interior are not in pure form and exhibit various entrenched impurities and are interspersed. Thus, when a neutron is discharged by a decaying atom, its occurrences of hitting another atom of radioisotope in order to continue the chain reaction becomes lower in comparison to the man-made nuclear reactor. In this manner, the radioactive chain reaction in the interior of the Earth is not well-sustained.

Answer: C

Explanation:

Atoms that undergo fission aren’t concentrated enough to sustain a chain reaction.

How many shells will transition metals use to bond with other elements? (site 2)

Answers

Transition metals can use the 2 outermost shells to bond with other elements.

Ice (H2O) melting at 273 K and 1 atm has = 6.01 kJ/mol and = 6.01 kJ/mol while water vaporizing under the same conditions has = 37.6 kJ/mol and = 40.7 kJ/mol. Why is there such a large difference between and , but not for and ?

Answers

Answer:

Degree of intermolecular hydrogen bonding

Explanation:

The energy required to melt a solid substance and the temperature at which the solid melts depends on the structure of the solid crystal as also on the magnitude of the intermolecular forces present in the solid.

Ice is less dense than liquid water, there are spaces in the crystal structure of ice. Secondly, the magnitude of hydrogen bonding in ice is lower due to lower intermolecular interaction between the water molecules. Given the lower intermolecular interaction in ice, the heat of fusion is much lower since the intermolecular interactions are easier to break.

In liquid water, hydrogen bonding is much stronger and there is greater intermolecular interaction between the water molecules. It takes more energy to break down these intermolecular interactions, hence the high enthalpy of vaporization of liquid water.

How could using ethanol as a fuel affect the carbon dioxide level in the atmosphere is this good or bad for the environment PLEASE HELP ME, IT'S FOR MY NATIONAL 5 ASSIGNMENT

Answers

hey there you see ethonol i beliive is a corn based fuel and scientists are saying that it is more healthy for are invirment  but not 100% green.however this fuel is not a renewable resource it is still widely abundent because we have corn felids. but i think it is not the smartest investment because if we have a big storm or cropos wont grow anymor than we would not have cars therfore limiting transportationn  which setting a huge deppresion. gkad you asked i hads something simmilar to this on my ssvec  assignment

Count the total number of atoms in sio2:

Answers

Atoms are the basic units of matter and the defining structure of elements. We count the number of atoms by the total number of elements present in the compound. In this case, we have 1 atom of Si and 2 atoms of oxygen which would have 3 total number of atoms.

For clouds to form, water vapor in the air must condense and change from a gas to a liquid. What must water molecules do as part of this process?A.
come close together and stick to each other
B.
escape into the surrounding air
C.
connect to each other in a rigid structure
D.
stop moving relative to each other

Answers

Answer:

come close together and stick to each other

Explanation:

The difference between three phases of a matter is the intermolecular interactions and thermal energy.

In case of gas, the intermolecular interactions are weak and thermal energy is high. So molecule move randomly, far from each other.

However in case of liquids the force of interactions are relatively stronger and the molecules are held together more effectively than gas.

Thus in order to condense a gas, we have to make the molecule come closer to each other so that they can be converted to liquid.

A.  

come close together and stick to each other
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Which of the following pairs of items will be attracted by one another?A. A positively charged pith ball and a negatively charged glass rod B. Two positively charged pith balls C. A negatively charged pith ball and a negatively charged glass rod D. Two negatively charged pith balls
a sample of copper wire with a mass of 1.659 g is heated with excess powdered sulfur until the copper has combined with the sulfur, and all the extra sulfur has been burned off. The final product (a sulfide of copper ) has a mass of 2.080 g. Calculate the empirical formula of the product, and name it.