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stira [4]
3 years ago
13

1.Which of the following would decrease the rate of a chemical reaction?

Chemistry
2 answers:
timama [110]3 years ago
7 0

Answer:

b

Explanation:

beacuse when u reduce the concentration

Contact [7]3 years ago
4 0

Answer:

d.) add a catalyst

Explanation:

ae per I know this is Ur , but I am not sure so u check it

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In an exothermic reaction, the average kinetic energy of the particles of matter ib the products _____
erastova [34]

Answer:

decreases

Explanation:

I'm hope it's correct

3 0
3 years ago
analytical chemists can detect very small amounts of amoin acids , down to 3x10^-21 mol. how many molecules of an amino acid (mr
sesenic [268]
The number of particles in one mole is given be Avagadro's number <span>6.022×10^23

Multiply by number of moles.

3 ×10^-21 mol * 6.022 ×10^23 molecules/mol = </span><span>1,807 molecules
(rounded to nearest whole number)
 </span>
6 0
3 years ago
A substance is melting, so it is transitioning from solid to liquid. What kind of change is this?
Nostrana [21]

Answer:

chemical or physical i dont know for sure i kniw i have learned this juat cant rember

8 0
4 years ago
Read 2 more answers
A train in Japan can travel 813.5 miles in 5 hours
Anastaziya [24]

Answer:

162.7miles/hr

Explanation:

Given parameters:

Distance covered by the train  = 813.5miles

Time taken  = 5hours

Unknown:

Speed of the train  = ?

Solution:

Speed is a physical quantity.

It is mathematically expressed as;

      Speed  = \frac{distance}{time}

So, input parameters and solve;

   Speed  = \frac{813.5}{5}  = 162.7miles/hr

8 0
3 years ago
The metal tantalum becomes superconducting at temperatures below 4.483 K. Calculate the temperature at which tantalum becomes su
masha68 [24]

Answer:

The correct answer is "-268.667°C".

Explanation:

Given:

Temperature,

= 4.483 K (below)

Now,

The formula of temperature conversion will be:

⇒ T(^{\circ} C)=T(K)-273.15

By putting the values, we get

⇒            =4.483-273.15

⇒            =-268.667^{\circ} C

Thus the above is the correct answer.

3 0
3 years ago
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