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MAVERICK [17]
3 years ago
7

Completing sentences.

Chemistry
1 answer:
Wittaler [7]3 years ago
8 0

1.atoms

2.two

3. Elements are combined to make compounds

4.fewer

5. Larger  

6. Starch is made up of three Elements.

I’m not sure about the other two but I hope this helped!!


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A student dissolves powdered tea in water. How can the student separate the parts of the mixture?
mars1129 [50]

Answer:

The student can evaporate the liquid water.

Explanation:

The student only mixed water with the powdered tea. Therefore, if the water is evaporated from the mixture, the student will be left with the tea mixture only.

7 0
2 years ago
Does the lava that forms shield volcanoes probably have a lot of silica or water in it? Explain your answer.
RSB [31]
Sheild volcanoes contain more water in it. It is a type of volcano that is built entirely of fluid lavas. 
5 0
3 years ago
Read 2 more answers
How do we determine the number of Protons an element has?
Ilia_Sergeevich [38]

Answer:

The no. of protons = atomic number

please rate 5 stars

7 0
3 years ago
A mass of 2.20 g carbon monoxide is reacted with 4.86 g hydrogen to form methanol.CO(g) + 2 H2(g) → CH3OH(g)The reaction is perf
iogann1982 [59]

Answer:

The partial pressure in mm Hg for each of the species are:

PCO = 0

PH2 = 3874

PCH3OH = 347

The total pressure is 4221

Explanation:

We have to use Ideal gas equation PV = nRT and Partial pressure rule Total Pressure= ∑ Partial pressures.

We have following data:

T= 357K (85+272); nCO=0.078 (2.2/28); nH2 = 2.43 (4.86/2); R=62.36

With equation CO(g) + 2 H2(g) → CH3OH(g) we can calculate the amount of moles the reaction has finished. The limit reagent is CO because is consumed completely and moles CO in flask are 0. According to equation, every CO mol produces one CH3OH mol. That means 0.078 CO moles produces 0.078 CH3OH moles. From Ideal gas equation we have P=nRT/V.

Applying:

PH2=0.87*62.36*357/5=3874

PCH3OH =0.078*62.36*357/5=347

Total P = 3874+347=4221

I hope my answer helps you

7 0
3 years ago
(e) A 0.050 mol sample of a hydrocarbon was burned in excess oxygen.
LenKa [72]

The correct answer is 0.15.

We are aware that there is 0.05 mol of an unidentified hydrocarbon we will refer to as "X" and that its burning produces 6.6 g of carbon dioxide and 3.6 g of water.

These quantities might be converted to moles by applying the following formula:

amount= mass/ relative atomic mass

Thus, the following equation may be written for H2O: moles = 3.6 / 18 = 0.2 and for CO2: moles = 6.6 / 44 = 0.15.

0.05X + x'O2 = 0.15CO2 + 0.2H2O

This may be made simpler by dividing through by 0.05 (this step is likely to be the most helpful to you), resulting in:

1 x + x O2 = 3 co2 + 4 H2O

The hydrocarbon must have been the source of all the carbon in the carbon dioxide and all the hydrogen in the water.

Accordingly, 4 x 2 = 8 moles of H and 3 x 1 = 3 moles of C.

There are 3/1 = 3 Cs and 8/1 = 8 Hs in one X molecule.

This clearly identifies C3H8 or propane as the hydrocarbon X (dividing by 1 seems unnecessary, but it illustrates the process to use if there were more than one mol of X in the first equation).

To learn more about number of moles of carbon dioxide refer the link:

brainly.com/question/12723070

#SPJ9

6 0
2 years ago
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