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Step2247 [10]
3 years ago
8

PLEASE HELP ME

Chemistry
1 answer:
Mariulka [41]3 years ago
3 0

Answer:

Water is also a product of photosynthesis. This water is produced from the oxygen atoms in the carbon dioxide molecules. The oxygen molecules released into the atmosphere come exclusively from the original water molecules, not from the carbon dioxide molecules...

Hope this helps answer your question!

B r a i n l e i s t ?

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What is a chemical property of carbon?
MA_775_DIABLO [31]
I'll give you three just in case a couple are ones you aren't quite looking for.

-Carbon has several allotropes, or different forms in which it can exist. A couple of allotropes included are graphite and diamond, which both have very different properties.

-Despite carbon's ability to make 4 bonds and its presence in many compounds, it is highly nonreactive under normal conditions.

-Carbon exists in three main isotopes: ¹²C, ¹³C, and ¹⁴C in which ¹⁴C is radioactive and used in dating carbon-containing samples (known as radiometric dating)

Hope this helps!!
7 0
4 years ago
How many protons and neutrons are in an atom of ^249 Bk?
umka21 [38]
Bk has an atomic number of 97 meaning that there are 97 protons and 152 neutrons.
7 0
3 years ago
Charcoal is primarily carbon. what mass of co2 is produced if you burn enough carbon (in the form of charcoal) to produce 4.80 k
Reika [66]
When carbon is burned in air carbon iv oxide gas is formed.
C (s) + O2 (g) = CO2(g)  ΔH = - 393.5 kj/mol
The enthalpy change of the  reaction is -393.5 j/mol which means that when one mole of carbon is completely burnt in air then 393.5 j of energy is evolved.
Thus, 1 mole = -393.5 j , then for 480 kj 
            = 480 × 1/393.5
             = 1.2198 moles
          1 mole of carbon iv oxide is equal to 44 g 
thus, 1.2198 moles will be 1.2198 × 44 = 53.6712 g of CO2
6 0
4 years ago
Please help me! I'm having trouble!
otez555 [7]
I think the answer would be d
4 0
3 years ago
Read 2 more answers
3 C2H2(g) → C6H6(g) What is the standard enthalphy change ΔHo, for the reaction represented above? (ΔHof of C2H2(g) is 230 kJ mo
masha68 [24]

Answer: The standard enthalpy change  is -607kJ

Explanation:

The given balanced chemical reaction is,

3C_2H_2(g)\rightarrow C_6H_6(g)

First we have to calculate the enthalpy of reaction (\Delta H^o).

\Delta H^o=H_f_{product}-H_f_{reactant}

\Delta H^o=[n_{C_6H_6}\times \Delta H_f^0_{(C_6H_6)}]-[n_{C_2H_2\times \Delta H_f^0_{(C_2H_2)}]

where,

We are given:

\Delta H^o_f_{(C_2H_2)}=230kJ/mol\\\Delta H^o_f_{(C_6H_6)}=83kJ/mol

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times 83)]-[(3\times 230)]=-607kJ

The standard enthalpy change  is -607kJ

7 0
4 years ago
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