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adell [148]
3 years ago
9

Refer to the erg to find the potential hazards to health for un1825

Biology
1 answer:
Nat2105 [25]3 years ago
8 0
<span>UN1825 refers to Sodium monoxide.It is a white granular material. It reacts with water to give sodium hydroxide with the evolution of heat. It is corrosive to metals and tissue. The oxides of sodium and potassium react with water vigorously and with enough evolution of heat to cause boiling and spattering of hot caustic solution.Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.</span>
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Staphylococcus aureus is grown in heart-infusion broth at 37°C. If you start exponential phase with 100 cells, and after 90 minu
Nikolay [14]

Answer:

30 minutes

Explanation:

Bacteria reproduce by binary fission, a process by which one parent cell divides to form 2 progeny cells. Because one cell produces 2 progeny cells, bacteria are said to undergo exponential ( logarithmic) growth.

As in the case of staphylococcus aureus, we start with 100 cells ,  and after 90 minutes number becomes 800 that means  , firstly the cells doubled (100 x 2 = 200 ) after 30 minutes. Again after 30 minutes they doubled ( 200 x 2 =400 ) and again after 30 minutes they doubled (400 x 2 = 800). So in 90 minutes 100 cells became 800 cells.

Hence the generation time for S.aureus is 30 minutes.

8 0
2 years ago
Describe the two main stages of photosynthesis in general terms
zhenek [66]
There are 2 stages in photosynthesis
light stage and dark stage
light stage takes placein the grana because there's presence of chlorophyll. 2 reactions take place here.
1. photolysis of water where water molecules are split into hydrogen ions and oxygen gas in presence of chlorophyll and oxygen gas. the oxygen gas is released into the atmosphere but hydrogen ions are used in dark stage.
2. formation of adenosine triphosphate which is formed by combination of adenosine diphosphate and an inorganic phosphate in presence of light. this adenosine triphosphate is also used in dark stage
dark stage is a light independent stage which takes place in the stroma. energy is provided by adenosine triphosphate formed in the light stage. this stage involves tge combination of carbon(iv)oxide and hydrogen ions to form a simple carbohydrate and a water molecule. this process is known as carbon(iv)oxide fixation which is the reduction of carbon(iv)oxideby hydrogen ions using adenosine triphosphate energy to form a simple carbohydrate.
This simple carbohydrate is changed to glucose for use in the plant or to starch for storage
6 0
3 years ago
Why a plant which is left in the dark for a long period of time will test negative for starch?
Zanzabum
When a plant is left in dark for several hours, it does not get sunlight. Isn't it?
When a plant does not get sunlight, it cannot prepare food for itself , i.e, photosynthesis does not take place. When it does not prepare food in the form of starch, it will test negative for it.

hope it helps!
3 0
3 years ago
After you have rested an injured body part, the next step should be _____.
kirill115 [55]
I believe the answer should be B) rehabilitation exercises so,
After you have rested an injured body part, the next step should be rehabilitation exercises.
3 0
3 years ago
Read 2 more answers
How do you categorize rocks? ​
Olenka [21]

it is categorized by three types

1. igneous rock

2. sedimentary rock

3. metamorphic rock

6 0
3 years ago
Read 2 more answers
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