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Paul [167]
3 years ago
9

In general, as activation energy increases, reaction rate ________. goes down if the reaction is exothermic goes down if the rea

ction is endothermic stays the same regardless of whether the reaction is exothermic or endothermic goes down regardless of whether the reaction is exothermic or endothermic none of the above
Chemistry
1 answer:
vova2212 [387]3 years ago
6 0

Answer:

goes down regardless of whether the reaction is exothermic or endothermic

Explanation:

The activation energy is the minimum energy the reactants in a chemical reaction will have to reach in order to be transformed into products.

Hence, the higher the activation energy of a reaction, the lower the reaction rate and the lower the activation energy of a reaction, the higher the reaction rate.

Activation energy is independent of whether a reaction is exothermic or endothermic.

<em>Therefore, as activation energy increases, reaction rate goes down irrespective of whether is is exothermic or otherwise.</em>

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A car at rest ends accelerates for 12 seconds. After this time the car is going 36 m/s. What was its acceleration?
Zigmanuir [339]

Acceleration is defined as velocity per unit time.

Acceleration=\frac{Velocity}{time}

a=\frac{dv}{dt}

Here, a=acceleartion,

v=velocity=36 m/s

t=time=12 s

a=\frac{dv}{dt}

a=\frac{36}{12}

a=3 ms⁻²

A car at rest ends accelerates for 12 seconds. After this time the car is going 36 m/s. So acceleration that is a=3 ms⁻².


4 0
3 years ago
Read 2 more answers
You drop a rock weighing 23.2 g into a graduated cylinder that contains 55 mL. The level of the water rises to 62 mL. What is th
ra1l [238]

The density of the rock is 3.314g/mL

CALCULATE DENSITY:

  • According to this question, a rock weighs 23.2g. After dropping the rock into a graduated cylinder containing 55mL of water, the level changes to 62mL.

  • This means that the volume of the rock can be calculated as follows:

Volume of rock = 62mL - 55mL

Volume of rock = 7mL

Density can be calculated using the formula as follows:

Density = mass ÷ volume

Density = 23.2 ÷ 7

Density = 3.314g/mL

Therefore, the density of the rock is 3.314g/mL

Learn more: brainly.com/question/6034174?referrer=searchResults

4 0
3 years ago
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen fluoride hf
pychu [463]
The  standard  state formation reaction  is  a  chemical  reaction  in  which one  moles  of  substance  in  its  standard state  is formed from  its constituent  element in  their  standard  state.All  the  substance must  be  in  their  most stable  state  at  100kpa  and  25  degrees  celsius.
therefore  for  HF is
1/2H2 +1/2F2 =HF
6 0
3 years ago
Read 2 more answers
I need help
Liono4ka [1.6K]

Answer:

d and e - Sodium and antimony

Explanation:

The atomic numbers remain the same, while the mass numbers change (because neutrons are being added or taken away).

sodium has an atomic number of 19 and a mass number of 39 - in d, it has an atomic number of 19 but a mass number of 40. therefore, it is an isotope

antimony has an atomic number of 51 and a mass number of 121.60 - in e, it has an atomic number of 51, but a mass number of 123. therefore, it is an isotope

6 0
3 years ago
6. Which of the following is an electrical hazard?
Lorico [155]
I believe the answer is C because the first two are mechanical hazards and C mentions plug which is electrical.
3 0
2 years ago
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