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Liono4ka [1.6K]
3 years ago
14

Which is not true for a catalyst?

Chemistry
1 answer:
maria [59]3 years ago
3 0

Answer: (A) It appears as a reactant in the net chemical reaction

Explanation:

A catalyst is  A substance that speed up the chemical reaction without its self being consumed in the reactants or the products.It does this by lowering the activation energy of the reaction by speeding up the rate of reaction.

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What is a factor that can influence the rate of a nuclear decay reaction?
Viktor [21]

the stability of the radioactive element

Explanation:

The stability of a radioactive element can influence the rate of nuclear decay reaction. Pressure, temperature and concentration only affects chemical changes. These factors would not have any effect on radioactive decay of an element.

  • Every atomic nucleus have a specific neutron/proton ratio which ensures the stability of the nucleus.
  • Any nucleus that deviates from the stability ratio will continue to split until it achieves stability.
  • The more unstable a nucleus is, the faster it decays.
  • This is the basis of radioactive decay of elements.

Learn more:

radioactivity brainly.com/question/10125168

radioactive brainly.com/question/4207569

#learnwithBrainly

7 0
3 years ago
How many kilometers can the car travel on the amount of gasoline that would fit in a soda can? The volume of a soda can is 355 m
g100num [7]
I'll assume that the car is a Honda Insight with <span>EPA gas mileage rating of 57mi/gal in the city.

First, we will convert all units into Km and mL:
1 mile = </span><span>1.609344 Km
</span><span>1gal = 3785.411 mL
</span>
Then, we will calculate the distance the car can move by multiplying the mileage rating and the the volume available as follows (note that I will be converting units in the same step):
distance = <span>(57mi/gal) x (1.609344 km/1mi) x (1gal/3785.411mL) x 355mL 
               = 8.6027 Km</span>
4 0
4 years ago
Read 2 more answers
A balloon containing N2 has 1.70 moles and occupies 3.80L. What will the volume be if the number of moles is increased to 2.60mo
leonid [27]

Answer:

5.81L

Explanation:

N1 = 1.70 moles

V1 = 3.80L

V2 = ?

N2 = 2.60 moles

Mole - volume relationship,

N1 / V1 = N2 / V2

V2 = (N2 × V1) / N1

V2 = (2.60 × 3.80) / 1.70

V2 = 9.88 / 1.70

V2 = 5.81 L

The volume of the gas is 5.81L

8 0
3 years ago
The following Lewis diagram represents the valence electron configuration of a main-group element. This element is in group 2A A
Paraphin [41]

<u>Answer:</u> The symbol of the ion formed is Ca^{2+}

<u>Explanation:</u>

An ion is formed when a neutral atom looses or gains electrons.

  • When an atom looses electrons, it results in the formation of positive ion known as cation.
  • When an atom gains electrons, it results in the formation of negative ion known as anion.

Electronic configuration is defined as the representation of electrons around the nucleus of an atom.

Number of electrons in an atom is determined by the atomic number of that atom.

The element present in Group 2-A and in period 4 is Calcium (Ca)

Electronic configuration of Ca atom:  1s^22s^22p^63s^23p^64s^2

This atom will loose 2 electrons to attain stable electronic configuration similar to Argon element (noble gas)

The electronic configration of Ca^{2+}\text{ ion}=1s^22s^22p^63s^23p^6

Hence, the symbol of the ion formed is Ca^{2+}

4 0
4 years ago
What type of substance would be best for use in a cooling system?
Sonbull [250]

Answer:

B

Explanation:

<h3><em>Liquid with a low specific heat </em></h3>

3 0
3 years ago
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