<span>The standard unit for measuring volume is the B. liter.
Standard units for measuring anything are the most basic units, without any prefixes - so liter, meter, etc. So it's not different here - milliliter and deciliter are incorrect, and cubic centimeter is commonly used for volume, but it is not the standard unit.
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Therefore, moving left to right across a period the nucleus has a greater pull on the outer electrons and the atomic radii decreases. Moving down a group in the periodic table, the number of filled electron shells increases
Answer : The concentration of 
ion is 
Explanation :
First we have to calculate the moles of 
.
The balanced chemical reaction will be:
From the reaction we conclude that,
1 mole of dissociate to give 3 moles of ion and 1 mole of 
ion
So,
0.03 mole of dissociate to give 
moles of ion and 0.03 mole of ion
Now we have to calculate the concentration of ion.
Therefore, the concentration of ion is
Answer:
Explanation:
Given that,
A car accelerates negatively from 35m/s to 8m/s in 8s.
We need to find the car's acceleration.
Initial speed, u = 35 m/s
Final speed, v = 8 m/s
Time, t = 8 s
The acceleration of an object is equal to the rate of change of velocity. So,
Put all the values,
So, the acceleration of the car is equal to 
.
Answer:
A. C₃H₄N
Explanation:
- Firstly, we need to calculate the no. of moles of C, H, and N using the relation:
<em>no. of moles = mass/molar mass.</em>
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∴ no. of moles of C = mass/molar mass = (90.0 g)/(12.0 g/mol) = 7.5 mol.
∴ no. of moles of H = mass/molar mass = (11.0 g)/(1.0 g/mol) = 11.0 mol.
∴ no. of moles of N = mass/molar mass = (35.0 g)/(14.0 g/mol) = 2.5 mol.
- We should get the mole ratio of each atom by dividing by the lowest no. of moles (2.5 mol of N).
∴ the mole ratio of C: H: N = (7.5 mol/2.5 mol): (11.0 mol/2.5 mol): (2.5 mol/2.5 mol) = (3: 4.4: 1) ≅ (3: 4: 1).
- So, the empirical formula is: A. C₃H₄N.
