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fredd [130]
2 years ago
6

What is true of enzymes? They only speed up reactions. They speed up or slow down any reaction in a living thing. They act as ca

talysts, each for one specific reaction. They only slow down reactions
Chemistry
2 answers:
muminat2 years ago
7 0
They act as catalysts
Afina-wow [57]2 years ago
7 0

There are 2 correct options for this problem.

1) They only speed up the chemical reactions. : True

Enzymes are biological catalysts. A catalyst lowers the activation energy of the reaction. When a reaction needs less energy to start, it occurs at a faster rate.

Many biological reactions that occur in our body are occurring at body temperature. The reactions would become very slow at this temperature . Therefore enzymes act a catalyst to speed up these reactions.

2) They act as catalysts, each for one specific reaction. : True

This option is true because as discussed above, enzymes are catalyst and their job is to speed up a chemical reaction. Enzymes have active sites where a particular substrate can bind during the reaction. Therefore a given enzyme acts a catalyst for a specific reaction only.

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PLEASE HELPPP. I'LL AWARD BRAINLIEST !!!!!
dsp73

Answer:

the properties of catalyst are

it remains unchanged after chemical reactions

it accelerate or deaccelerate the reaction without taking part in it

Explanation:

they are used to convert raw materials into useful one

catalyst are integral in making plastics

5 0
3 years ago
how many molecule of carbon dioxide are needed to react with excess iron oxide to produce 11.6 g of iron
lesya692 [45]

Answer:

0.16 moles of Carbon

Explanation:

The balanced reaction equation:

2Fe_{2}O_{3} + 3C → 4Fe + 3CO_{2}↑

The mole ratio of Carbon to Iron is 3 : 4 (since Fe2O3 is in excess)

i.e 3 moles of C produces 4 moles of Fe.

If 1 mole of Fe - 55.8g of Fe

? moles - 11.6g of Fe

= \frac{11.6}{55.8} = 0.208 moles

But 3 moles of C - 4 moles of Fe

? moles of C - 0.208 moles of Fe

= \frac{3 *0.208}{4} = 0.16 moles of carbon.

I hope this explanation was clear and useful.

5 0
3 years ago
¿Qué elemento tiene el mismo número de órbitas que el Hidrógeno? ¿Por qué? ¿Tienen propiedades similares, por qué?
Aliun [14]

What element has the same number of orbits as Hydrogen? Why? Do they have similar properties, why?

Answer:

Helium

Explanation:

Helium has the same number of orbitals as hydrogen because they belong to the same period on the periodic table.

Periods are the horizontal arrangement of elements. Elements in the same period are known to have the same number of electronic shell or orbitals.

In period 1 where we have just Hydrogen and Helium, the number of orbitals is 1.

 

For properties of a specie, elements in the same group which are the vertical arrangement of elements have the same properties. Since both Hydrogen and helium are in different groups, their properties differ.

7 0
2 years ago
what concentration in parts per million in a solution that contains .008 grams of o2 dissolved in 1000 grams of water
julia-pushkina [17]
Ppm = mass of solute mg / mass of solvent kg

0.008 * 1000 =  8.0 mg ( solute )

1000 / 1000 = 1.0 kg (solvent )

ppm = 8 / 1

= 8.0 ppm

hope this helps!
7 0
3 years ago
I need help pleaseeeeeeee
posledela
Dorsal Side: B
Ventral Side: D
Anterior End: A
Posterior End: C
6 0
2 years ago
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