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nata0808 [166]
2 years ago
8

HELP ITS SCIENCE PLS

Chemistry
2 answers:
gulaghasi [49]2 years ago
8 0
15. 7


16. 30 (but not sure)


17.Conditions such as high light intensity result in an increased stomata index



19. They grow toward the sunlight to be able to generate energy by photosynthesis

20. If you plant a seed on its side, the shoot and root will emerge horizontally, but quickly change their direction in growth.

21. When the soil of a plant runs too low of available water, the water chains in the xylem become thinner and thinner due to less water...Occasionally, vascular fungal diseases will clog the xylem tissue and cause wilting.
anygoal [31]2 years ago
6 0
Don’t know lol um maybe
You might be interested in
4. DBearded waste of Co-60 must be stored until it is no longer radioactive. Cobalt-60
Bingel [31]

464 g radioisotope was present when the sample was put in storage

<h3>Further explanation</h3>

Given

Sample waste of Co-60 = 14.5 g

26.5 years in storage

Required

Initial sample

Solution

General formulas used in decay:  

\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}

t = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

Half-life of Co-60 = 5.3 years

Input the value :

\tt 14.5=No.\dfrac{1}{2}^{26.5/5.3}\\\\14.5=No.\dfrac{1}{2}^5\\\\No=\boxed{\bold{464~g}}

8 0
2 years ago
Write the molecular formula of nitrate using criss cross method <br><br><br><br>​
exis [7]

Answer:

NO3 that is the answer to the question

8 0
3 years ago
PLZ HELP
nika2105 [10]
Mjdksksksnsjdkjdjsksksjdndnd
8 0
3 years ago
Read 2 more answers
Nitrogen (N2) and hydrogen (H2) react to make NH3 according to the following
Schach [20]

The number of moles of NH3 that could be made would be 0.5 moles

<h3>Stoichiometric reactions</h3>

From the balanced equation of the reaction:

N2 (g) + 3 H2(g) ----> 2NH3 (g)

The mole ratio of N2 to H2 is 1:3

Thus, for 0.50 moles of N2, 1.5 moles of H2 should be present. But 0.75 moles of H2 was allowed to react. Meaning that H2 is limiting in this case.

Mole ratio of H2 and NH3 = 3:2

Thus for 0.75 moles H2, the mole of NH3 that would be produced will be:

                       2 x 0.75/3 = 0.5 moles

More on stoichiometric calculations can be found here: brainly.com/question/8062886

3 0
1 year ago
I'm not really sure on how to test if it is a chemical or physical change....
kolezko [41]
Chemical change because it cannot be reversed
4 0
3 years ago
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