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V125BC [204]
3 years ago
15

I NEED THIS ASAP Someone please help me

Chemistry
2 answers:
IceJOKER [234]3 years ago
8 0

Answer:

B. Four moles of water were produced from this reaction.

Explanation:

I took the test and got it correct

marysya [2.9K]3 years ago
6 0

Answer:

the answer is B

Explanation:

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Cracking the periodic table code why aren't the elements listed in alphabetical order answer key
finlep [7]

The elements in the periodice table are not listed in alphabetical order, because the arragement in rows (periods) and columns (groups or familes), in increasing order of atomic number (number of protons of the atoms) permits to explain similarities among the elements, trend in some properties, and even predict properties of unknown elements.


For example, the elements of the first group (family), called alkaline metals, all have 1 valence electron, have similar physical properties (ductibility, malleability, luster, thermal and electricity conductivity), react in similar way with water, show a trend in the atomic radii and in the ionization energy.


You can tell similar stories for other groups like, alkalyne earth metals, halogens and noble gases.


You can also tell trends in electroneativities, and atomic radii, for a row of elements, as per the order they are in the row.


So, the current array resulted very helpul for chemists to explain and predict the behavior and properties of the elements.

4 0
3 years ago
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Norma-Jean [14]

Answer:

C.4

Explanation:

6 0
3 years ago
What substance is added during hydrolysis in order to break down food macromolecules?
TEA [102]
Hey there! :D

Look at the word hydrolysis. Hydro= water Lysis = split. (Root words) 

So, water (in terms of the word) is added to help split and breakdown macromolecules. 

I hope this helps!
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3 0
3 years ago
Read 2 more answers
If 50 g of lead (of specific heat 0.11 kcal/kg ∙ C°) at 100°C is put into 75 g of water (of specific heat 1.0 kcal/kg ∙ C°) at 0
Contact [7]

Answer: The final temperature is 279.8K

Explanation:

heat_{absorbed}=heat_{released}

As we know that,  

Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})

m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]         .................(1)

where,

q = heat absorbed or released

m_1 = mass of lead = 50 g

m_2 = mass of water = 75 g

T_{final} = final temperature = ?

T_1 = temperature of lead = 100^oC=373K

T_2 = temperature of water = 0^oC=273K

c_1 = specific heat of lead = 0.11kcal/kg^0C

c_2 = specific heat of water= 1.0kcal/kg^0C

Now put all the given values in equation (1), we get

50\times 0.11\times (T_{final}-373)=-[75\times 1.0\times (T_{final}-273)]

T_{final}=279.8K

Therefore, the final temperature of the mixture will be 279.8 K.

3 0
3 years ago
Which of the following is true about neutralization reactions? Question 6 options: They involve strong acids and strong bases. T
EastWind [94]
The correct option is: ALL OF THE ABOVE.
A neutralization reaction is one in which acid and base react together in order to produce salt and water. The water formed is as a result of hydrogen ion and the hydroxyl ion which combine together to produce water. When a solution is neutralized, it implies that the salt is formed from equal weights of acid and base.

7 0
3 years ago
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