Which could be the catalyst in a chemical reaction?

Chemistry

1 answer:

elena-s [515]3 years ago

7 0

enzyme if you use plato

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Which notation represents atoms that have the same number of protons but a different neutron?

ArbitrLikvidat [17]

Those are called isotopes,

the answer is 3.

each element has its own unique number of protons (atomic number) but a different number of neutrons can be shown in example number 3.

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3 years ago

Protons have a positive charge true or false

aksik [14]

Answer:

True

Explanation:

Protons have a positive electrical of +1

6 0

2 years ago

Convert 0.900 atm of pressure to its equivalent in millimeters of mercury. express the pressure numerically in millimeters of me

Angelina_Jolie [31]

1 atm = 760 mm Hg

Where 760 mm is the height of Mercury for 1 atm.

For 0.900 atm,

Height of mercury = 0.900*760 = 684 mm Hg

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3 years ago

What does it mean when someone calls you dense?

GenaCL600 [577]

Answer:

And if someone calls you dense, they think nothing can get into your thick skull. Dense comes from the Latin densus which means thick and cloudy. In general, the word means packed tight and gives the sense that something is difficult to get through.

Explanation: Look it up :)

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3 years ago

Read 2 more answers

Measurements show that the ph of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

fomenos

Answer: Hydrogen ion concentration of the lake is $10^{-4}M$

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration. Acids have pH ranging from 1 to 6.9 and bases have pH ranging from 7.1 to 14.

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$