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brilliants [131]
2 years ago
8

Assessment timer and count

Chemistry
2 answers:
beks73 [17]2 years ago
4 0
Water
sunlight
and carbon dioxide
Maslowich2 years ago
3 0
A plant needs Sunlight, water, and carbon dioxide to produce ATP from photosynthesis.
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Calculate the change in ph when 3.00 ml of 0.100 m hcl(aq) is added to 100.0 ml of a buffer solution that is 0.100 m in nh3(aq)
nikklg [1K]

The change in pH is calculated by:

pOH = Protein kinase B + log [NH4+]/ [NH3] 

Protein kinase B of ammonia = 4.74 

initial potential of oxygen hydroxide= 4.74 + log 0.100/0.100 = 4.74 
pH = 14 - 4.74=9.26 

moles NH4+ = moles NH3 = 0.100 L x 0.100 M = 0.0100 
moles H+ added = 3.00 x 10^-3 L x 0.100 M=0.000300 

NH3 + H+ = NH4+ 
moles NH3 = 0.0100 - 0.000300=0.00970 
moles NH4+ = 0.0100 + 0.000300=0.0103 

pOH = 4.74 + log 0.0103/ 0.00970= 4.77 
oH = 14 - 4.77 = 9.23 

the change is  = 9.26 - 9.23 =0.03 

7 0
3 years ago
A(n) ____________ is a substance in which all the exact combinations of elements are always the same.
sveta [45]
B. compound
source is Glencoe Science book grade 7.
Also I just happening to be learning about this at school
3 0
3 years ago
What’s the answer????
ivolga24 [154]

Answer:

DNA

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6 0
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Calculate the mass of water produced when 2.06 g of butane reacts with excess oxygen.
dem82 [27]
2C4H10 + 13O2 = 8CO2 + 10H2O

1. (2.06g C4H10)/(58.12 g/mol C4H10) = 0.035mol C4H10

2. (0.035molC4H10)(10 mol H2O/2mol C4H10) = 0.177mol H2O

3. (0.177mol H2O)(18.01g/mol H2O) = 3.19g H2O
8 0
3 years ago
in your notebook,write the appropriate tempo for the following actions.Then demostrate the actions then,demostrate the action in
pogonyaev

Answer:

cell :—

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6 0
3 years ago
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