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luda_lava [24]
3 years ago
10

Hi please please help...marking brainlest & i have to turn this in in like 10 mins so i need it quick...(50 points)

Chemistry
1 answer:
Katen [24]3 years ago
4 0

Answer:

reactants             products

carbon- 8            carbon- 8

hydrogen- 20     oxygen- 26

Explanation:

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How would you determine which isotope pair to use for a particular material?
VLD [36.1K]

Answer:

Different types of isotopes are used for different materials or objects. For radiometric dating, uranium-235 is considered best for it while carbon-14 is used for dating of rocks. It is also used for dating of wood samples.

Explanation:

Carbon-14 and uranium-235 are used for different materials or objects for measuring the age of these materials. These two isotopes are radioactive in nature which means they emit gamma radiations which allow us to find the age of different objects. Carbon-14 has a low half life so it can be used for those objects which are present before thousands of years while uranium-235 is used for materials which are millions of years old due to high half life.

7 0
3 years ago
Describe the molecular structure of water
Jlenok [28]

Answer:

See attached

Explanation:

3 0
3 years ago
How many molecules are in 21.5G of water
NemiM [27]

Answer:

There are 6.022×1023 molecules in a mole. There are 18.01528 grams of water per mole of water. in 1g water

Explanation:

please Mark my answer in brainlist

6 0
3 years ago
If the pressure of a gas is 1.50 atm, its volume is 2.50 L, and its temperature is 22, what is the volume if the pressure is inc
aksik [14]

Answer:

The answer to your question is V2 = 1.3 l

Explanation:

Data

Pressure 1 = P1 = 1.5 atm

Volume 1 = V1 = 2.50 l

Temperature 1 = T1 = 22°C

Pressure 2 = P2 = 3 atm

Volume 2 = V2 = ?

Temperature 2 = T2 = 35°C

Process

1.- Convert temperature to °K

T1 = 22 + 273 = 295°K

T2 = 35 + 273 = 308°K

2.- Use the combine gas law to solve this problem

                P1V1/T1 = P2V2/T2

-Solve for V2

                V2 = P1V1T2 / T1P2

3.- Substitution

                V2 = (1.5 x 2.5 x 308) / (295 x 3)

4.- Simplification

                V2 = 1155 / 885

5.- Result

                 V2 = 1.3 l

3 0
4 years ago
Would aluminum be as useful as food wrapping if it had a much lower melting point? Explain your answer.
Salsk061 [2.6K]

The correct answers are as follows:

1. Aluminium will not be useful as food wrapping if it has a much lower melting point.

Aluminum is a metallic element that is malleable and soft, thus, it is easy to beat it into thin sheet, which are used to package food. The thin sheet is called aluminium foil. Aluminum is useful as a food wrapping because it has high temperature and thus, it does not react with food (the hotness of the packaged food is not capable of melting the metal). If the melting point of aluminium is lower, this implies that little temperature, such as the one from hot food will be able to melt aluminum foil, thus allowing the food to be contaminated with the metal.

2. When bleach react with fabric dye chemical change occur in the fabric.

The major element in bleach is chlorine. When laundry bleach is added to a fabric, the chlorine component of the bleach will react with the fabric dye and cause a colour change in the fabric. This type of change is called chemical change, because the original colour of the fabric can not be recovered.

3. Every substance has specific properties, which can be used to identify it. Two of such specific properties are melting point and boiling point. Melting point refers to a specific temperature at which a solid substance will melt while boiling point refers to a specific temperature at which a liquid substance will boil and turn to steam.

Water for instance has a boiling point of 100 degree Celsius. To find out if an unknown substance is water, one can determine the boiling point of such liquid. A boiling point of 100 degree Celsius will strongly signify that the substance is probably water. The same thing applies to melting point. If the specific boiling and melting point of substances are known, then they can be used to identify them.


4 0
3 years ago
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