Answer:
1 . 26
2. 55.854
Explanation:
because atomic number is the number of proton in other words smaller number and the mass number is the number of neutrons and electrons in other words bigger number .
hope this make sense :)
Answer:
CaCl₂
Step-by-step explanation:
The <em>empirical formula</em> is the simplest whole-number ratio of atoms in a compound.
The ratio of atoms is the same as the ratio of moles.
So, our job is to calculate the molar ratio of Ca to Cl.
Data:
Mass of Ca = 3.611 g
Mass of Cl = 6.389 g
Calculations
Step 1. <em>Calculate the moles of each element
</em>
Moles of Ca = 3.611 g Ca × (1 mol Ca/(40.08 g Ca)= 0.090 10 mol Ca
Moles of Cl = 6.389 g Cl
Step 2. <em>Calculate the molar ratio of the elements
</em>
Divide each number by the smallest number of moles
Ca:Cl = 0.090 10:0.1802 = 1:2.000
Step 3. Round the molar ratios to the nearest integer
Ca:Cl = 1:2.000 ≈ 1:2
Step 4: <em>Write the empirical formula
</em>
EF = CaCl₂
Answer:
c = 0.9 j/g. °C
Explanation:
Given data:
Mass of aluminium = 100 g
Initial temperature = 90 °C
Final temperature = 20°C
Heat transfer = 6300 J
Specific heat of aluminium = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
The Q will negative because metal release the heat.
c = Q / m. ΔT
ΔT = t2 - t1
ΔT = 20°C - 90 °C
ΔT = -70 °C
c = -6300 j/ 100 g.-70°C
c = -6300 j/ -7000 g.°C
c = 0.9 j/g. °C
Answer:
red litmus paper stays red in acidic and neutral solution.
red litmus paper turns blue in basic and alkaline solutions
the two basic will turn it blue
the acid will turn it red
Answer
not too sure, but perhaps, 24
Explanation:
1 mole = 12 apples
2 moles = 24 apples
