6. What volume will 9.38g of the mineral quartz (silicon dioxide SiO2)occupy given that the density if 2.65g/cm?
Answers
Answer:
The answer is
3.54 mL
Explanation:
The volume of a substance when given the density and mass can be found by using the formula
From the question
mass = 9.38 g
density = 2.65 g/cm³
The volume of the quartz is
We have the final answer as
3.54 mL
Hope this helps you
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Lithium has two isotopes.Li-6 and Li-7. Li-6 mass = 6.015121amu Li-7 mass = 7.016003amu Lithium Mass = 6.94049amu What is percent abundance of Li-6? I know that there is an equation: 6.9409 = (% Abundance Li-6 * Weight of Li-6) + (% Abundance Li-7 * Weight of Li-7) I don't know how to use it.
a. CH4 and C2H4
b. PbCl2 and PbCl4
c. N2O5 and NO2
d. C2H6 and C4H12
Answers
Answer: The correct option is d.
Explanation: Empirical formula is a chemical formula which has the simplest ratio of elements present in a chemical compound.
From the given following pairs, the pair which shares the same empirical formula is
Empirical formula of is
(by dividing the coefficients of
by 3)
Empirical formula of is
(by dividing the coefficients of
by 3)
Both the chemical formulas have same empirical formula. Hence, the correct option is d.
Answers
Answer : The concentration of solution is, 0.45 M
Solution :
The given balanced reaction is,
The moles ratio of and
is, 1 : 1 that means 1 mole of HCl neutralizes by the 1 mole of ammonia.
According to the neutralization law,
where,
= molarity or concentration of
solution = ?
= volume of
solution = 25 ml
= molarity of concentration HCl solution = 0.25 M
= volume of HCl solution = 45 ml
Now put all the given values in the above law, we get the concentration of solution.
Therefore, the concentration of solution is, 0.45 M
no. of mol of hcl = vol. (L) x molarity = 0.045 × 0.25 = 0.01125mol
ratio of hcl:nh3 after balancing eqn = 1:1
no. of mol of nh3 that is completely neutralised by hcl = 0.01125 × 1 = 0.01125mol
therefore, concentration of nh3 = mol / total volume (L) = 0.01125mol / 0.025L= 0.45M
6.09
23.4
129
Answers
1 mol N2 -------> 28.02 g
4.60 mol ---------> x g
x = 4.60 * 28.02
x = 129 g of N2
hope this helps!.
Answer:
Option D: 129 grams
Explanation:
edge! hope this helps
Answers
My reason being is because the physical shape and structure of the object doesn't change.
The color , appearance , or look may change and if that happens than its a chemical change.
______________________________________________________
Example :
Since the aluminum is rusting it probably turned red or orange , but the shape and size is still the same.
I really hope that this helps you out a lot , have a nice day.
Answers
Answer:1 Liter (L) is equal to 1000 milliliters (mL). To convert liters to mL, multiply the liter value by 1000. For example, to convert 2 liters to mL, multiply 2 by 1000, that makes 2000 mL is 2 L.
Explanation: