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antoniya [11.8K]
3 years ago
14

PLEASE HELP ME STRAIGHT AWAY

Chemistry
1 answer:
san4es73 [151]3 years ago
4 0
Desert plants commonly have small wax coated leaves to prevent moisture and water from evaporating. It is an important feature in desert plants to adapt to the arid climate. The wax on the leaves also protect the leaves from the chilling temperature of the desert at night. 
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Where was Sodium first discovered? <br> Location:<br> No copy-pasting
Verizon [17]

Answer:

Sodium was first discovered in Britain in 1807, where a chemist named Sir Humphry Davy found it by electrolysis of caustic soda.

Explanation:

Hope this helped!

4 0
3 years ago
Read 2 more answers
Points
ExtremeBDS [4]
The answer is D. A compound
6 0
3 years ago
Plz, Help :/ you can choose any question you want or all of it if you pleased.
Mnenie [13.5K]

Answer:

29. Proteins support the body's structural framework, chemical reactions, and contractions (muscle movement).

30. Proteins have a primary structure (polypeptide chain of amino acids), secondary structure (made up of alpha helices and beta pleat sheets), tertiary structure (superimposed on secondary structure), and quaternary structure (2 or more polypeptide chains with its own tertiary structure).

31. Protein molecules can denature if conditions aren't right, such as the wrong temperature or pH level. When denatured, proteins typically lose their shape and their function for a short time because their active sites become deactivated (though if conditions are too extreme, they can permanently lose their function). This happens to globular proteins because they are not nearly as stable as fibrous proteins due to their functional 3D shape.

I just did the first 3 since I could easily access the proteins section in my textbook at the moment. :)

5 0
3 years ago
What is the density of a cube that has a mass of 25 grams and a volume of 125cm
Sedbober [7]
Density = mass/volume

Density = 25 grams/ 125 cm³ = 0.2 g/cm³
6 0
4 years ago
How much heat is required to decompose 25.5 grams of NaHCO3? 2NaHCO3(s) + 129 kJ 2Na2CO3(s) + H2O(
Vaselesa [24]
To determine the heat required in order to decompose a certain amount of a substance, we need information on the heat needed to decompose one mole of the substance. This value are readily available online and other sources. For this reaction, the heat needed is 129 kJ per 2 mol of NaHCO3. We calculate as follows:

129 KJ / 2 mol NaHCO3 (1 mol / 84.01 g ) (25.5 g NaHCO3 ) = 19.58 kJ of heat is needed.
4 0
3 years ago
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