Mass of Product (y) vs Time (x) graph and Concentration of Reactant (y) vs Time (x) graph are two graphs which could be used to work out the rate of reaction from the gradient.
<h3>What is Rate of reaction ?</h3>
It is reffered as the speed at which a chemical reaction proceeds.
It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
The rates of two or more reactions can be compared using a graph of mass or volume of product formed against time.
concentration of reactant against time of reaction is used to find the instantaneous rate of reaction at a given time.
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Answer:
4.81×10¹⁰ atoms.
Explanation:
We'll begin by converting 3.2 pg to Ca to grams (g). This can be obtained as follow:
1 pg = 1×10¯¹² g
Therefore,
3.2 pg = 3.2 pg × 1×10¯¹² g / 1 pg
3.2 pg = 3.2×10¯¹² g
Therefore, 3.2 pg is equivalent to 3.2×10¯¹² g
Next, we shall determine the number of mole in 3.2×10¯¹² g of Ca. This can be obtained as follow:
Mass of Ca = 3.2×10¯¹² g
Molar mass of Ca = 40.08 g/mol
Mole of ca=.?
Mole = mass /molar mass
Mole of Ca = 3.2×10¯¹² / 40.08
Mole of Ca = 7.98×10¯¹⁴ mole.
Finally, we shall determine the number of atoms present in 7.98×10¯¹⁴ mole of Ca. This can be obtained as illustrated below:
From Avogadro's hypothesis,
1 mole of Ca contains 6.02×10²³ atoms.
Therefore, 7.98×10¯¹⁴ mole of Ca will contain = 7.98×10¯¹⁴ × 6.02×10²³ = 4.81×10¹⁰ atoms.
Therefore, 3.2 pg of Ca contains 4.81×10¹⁰ atoms.
Answer: B. Energy produced from the splitting of atoms.
Explanation: Nuclear energy is energy released by the nucleus of an atom as the result of nuclear fission, fusion, or radioactive decay
Answer: condensate.
Explanation.
1) You need a table with the boiling and freezing point of nitrogen to check the states at each given temperature.
2) Since the boling point of nitrogen is - 195.8, you know that at - 170°C it is a gas.
3) Since the freezing point of nitrogen is - 210°C, you know that at - 200°C it is liquid.
4) Then, nitrogen passed from gas to lquid, which is descripted by the condensation process, so it is said that it condensated (the gas became liquid).
<span>The substance that works as a reactant in an enzyme catalyzed reaction is called the substrate</span>