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schepotkina [342]
3 years ago
5

All the food chains in an ecosystem that are connected together form a ?

Chemistry
2 answers:
joja [24]3 years ago
5 0

All food chain in an ecosystem that are connected to each other forms a food web....

Therefore the answer is food web

bija089 [108]3 years ago
3 0

Answer: Food web

All of the interconnected and overlapping food chains in an ecosystem make up a food web.

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What is NOT a property of a metal?
Phantasy [73]

Answer:

Lustrous is NOT a property of metal

6 0
3 years ago
what is the balanced equation for the reaction of solid magnesium metal with oxygen gas to produce solid magnesium oxide
GaryK [48]

Answer:

2Mg + O₂ ⟶ 2MgO

Explanation:

Step 1. Start with the most complicated-looking formula (O₂?).

Put a 1 in front of it.

Mg + 1O₂ ⟶ MgO

Step 2. Balance O.

We have fixed 2 O on the left. We need 2O on the right. Put a 2 in front of MgO.

Mg + 1O₂ ⟶ 2MgO

Step 3. Balance Mg.

We have fixed 2 Mg on the right-hand side. We need 2 Mg atoms on the left. Put a 2 in front of Mg.

2Mg + 1O₂ ⟶ 2MgO

Every formula now has a coefficient. The equation should be balanced. Let’s check.

<u>Atom</u>  <u>On the left</u>  <u>On the righ</u>t

  Mg             2                  2

  O                2                  2

All atoms are balanced.

The balanced equation is

2Mg + O₂ ⟶ 2MgO

4 0
3 years ago
How many moles of co2 are produced when 5.70 mol of ethane are burned in an excess of oxygen
sweet-ann [11.9K]
I believe the answer is 6
4 0
3 years ago
What is the difference between an orbit in the Bohr model of the hydrogen atom and an orbital in the quantum mechanical model
adelina 88 [10]

Answer:

See explanation

Explanation:

In Bohr's theory, electrons are found in specific regions in space called orbits. These orbits are also called energy levels. An electron may move from one energy level to another by absorbing or emitting energy.

In the wave mechanical model, electrons are not found in a particular region in space according to Heisenberg's uncertainty principle.

We rather define a certain region in space where there is a high probability of locating the electron. This region in space where there is a high probability of locating the electron is called an orbital.

Hence, in the Bohr's model of the atom,electrons can surely be found in orbits while in the wave mechanical model, the orbital is a probability function that describes a region in space where an electron may be found.

4 0
3 years ago
Glycine, C2H5O2N, is important for biological energy. The combustion reaction of glycine is described by the following thermoche
vredina [299]

Answer:

-537.25 kJ/mol is the standard enthalpy of formation of solid glycine.

Explanation:

4C_2H_5O_2N(s) + 9O_2(g)\rightarrow 8CO_2(g) + 10H_2O(l) + 2N_2(g) ,\Delta H^{rxn} =-3896 kJ/mol

Standard enthalpy of formation of oxygen gas= \Delta H_{f,O_2}=0

Standard enthalpy of formation of carbon dioxide= \Delta H_{f,CO_2}=-393.5 kJ/mol

Standard enthalpy of formation of water = \Delta H_{f,H_2O}=-285.8 kJ/mol

Standard enthalpy of formation of nitrogen gas= \Delta H_{f,N_2}=0

Standard enthalpy of formation of glycine = \Delta H_{f,gly}=?

Enthalpy of the reaction = H_{rxn}=-3896 kJ/mol

H_{rxn} =

=8\times \Delta H_{f,CO_2} +10\times \Delta H_{f,H_2O}+2\times \Delta H_{f,N_2} - (4\times \Delta H_{f,gly}+9\times \Delta H_{f,O_2})

-3896 kJ/mol=8\times (-393.5 kJ/mol)+ 10\times (-285.8 kJ/mol)+0 - (4\times \Delta H_{f,gly} +0)

On rearranging :

4\times \Delta H_{f,gly}=8\times (-393.5 kJ/mol)+ 10\times (-285.8 kJ/mol)+ 3896 kJ/mol

\Delta H_{f,gly}=\frac{-2149 kJ/mol}{4}=-537.25 kJ/mol

-537.25 kJ/mol is the standard enthalpy of formation of solid glycine.

6 0
2 years ago
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