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2 years ago

All atoms of uranium have the same

2 answers:

8 0

Although Uranium (U) comes in many isotopes, Uranium has the same atomic number which is 92. The three naturally occurring isotopes of Uranium includes: U-233, U-236-, U-232. Other isotopes of Uranium are U-235 and U-238. All isotopes of Uranium comes in different atomic masses, yet, all atoms of Uranium will always be 92.

Schach [20]2 years ago

6 0

All the atoms of Uranium have the same atomic number. The atimic number is given by the sum of the number of neutrons(N) and the number of protons (P). There exists many isotopes of Uranium, but in all the atomic number remains the same. In some isotopes,the number of protons are different and in some the number of protons are different.

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Li ming think that chlorophyll is a reactant of photosynthsis, but her classmate Julian disagrees

yan [13]

In photosynthesis, chlorophyll is a reactant. Li ming is right.

Many plants and algae have a green tint because of chlorophyll. Chlorophyll is contained within organisms in structures known as chloroplasts, which are pictured here and arranged inside plant cells under a microscope.

A component that is present at the outset of a chemical reaction is known as a reactant.

In order to convert light energy into chemical energy that can be released through cellular respiration to power the organism's activities, plants and other living organisms use a process called photosynthesis.

The final component of photosynthesis is light energy. Through its chlorophyll-containing green pigments, the plant absorbs this energy. Li Ming is therefore right.

Learn more about photosynthesis here:

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4 0

9 months ago

Which of the following could be classified as producing a physical change?

SIZIF [17.4K]

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

3 0

2 years ago

Read 2 more answers

Charlie is frying an egg in a pan located over a gas burner. He develops a model to determine the energy produced by the flame i

frosja888 [35]

Answer: B.)

Explanation: Heat flows from pan to sounroundings

8 0

2 years ago

Which describes the volume of 1 mol of gas at standard temperature and pressure?

Alika [10]

Answer:

The volume is the same for any gas.

Explanation:

Which describes the volume of 1 mol of gas at standard temperature and pressure?

The volume is greater for a larger mass of gas. FALSE. The volume depends on the amount of matter (moles) and not on the mass.

The volume is the same for any gas. TRUE. The volume of any gas at standard temperature and pressure is 22.4 L.

The volume depends on the size of the container. FALSE. The volume is constant at fixed moles, pressure and temperature.

The volume varies with the pressure. FALSE. The standard pressure is 1 atm and it is constant.

7 0

2 years ago

1. Predict the precipitate that forms when aqueous solutions of silver nitrate and potassium chloride react to form products in

AfilCa [17]

Its quite alot of work, but here it is....
1. Silver Nitrate: AgNO3 (aq)
Potassium Chloride: KCl 
To do a double replacement reaction, switch the two metals around, in this case Silver and Potassium so you are left with: 
Potassium Nitrate: KNO3 
Silver Chloride: AgCl 
The chemical equation should be something like this: 
AgNO3 (aq) + KCl => KNO3 + AgCl

2The chemical reaction is as follows:Al2(SO4)3 + 3Ca(OH)2 → 3CaSO4 + 2Al(OH)3 Explanation:1mol of Al2(SO4)3 will react with 3mol Ca(OH)2 to produce 3mol CaSO4 and 2 mol Al(OH)3.First we have to find the number of moles of Al2(SO4)3 :Number of moles = Mass/ Molar massMass of Al2(SO4)3 = 500gMolar mass of Al2(SO4)3 = 342.15 g/molNumber of moles = 500/342.15Number of moles = 1.461 mol Al2(SO4)3Multiplying the coeffecient of Ca(OH)2 with 1.461:= 3*1.461 = 4.383 mol Ca(OH)2 Now we have to find the number of moles of Ca(OH)2:Mass of Ca(OH)2 = 450gMolar mass of Ca(OH)2 = 74.09 g/mol Number of moles = 450/74.09Number of moles = 6.074 mol Ca(OH)2We need 4.383mol to react completely with the Al2(SO4)3, so the Ca(OH)2 is in excess, and the Al2(SO4)3 is the limiting reactant. Excess unreacted: 6.074-4.383 = 1.69mol Ca(OH)2 unreacted

4 0

2 years ago

Read 2 more answers