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laila [671]
3 years ago
13

Name two elements that have the same properties as calcium (Ca). (4 points)

Chemistry
1 answer:
enyata [817]3 years ago
7 0
 beryllium, magnesium, strontium,barium<span>, and </span><span>radium. </span>
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An unknown compound contains 75.69% carbon, 8.80% hydrogen, and 15.51% oxygen by mass. A mass spectrometry analysis reveals that
tiny-mole [99]

Answer:

Molecular formula is C₂₆H₃₆O₄

Explanation:

The compound is 75.69 % C, 8.80 % H and 15.51 % O. This data means, that in 100 g of compound we have 75.69 g, 15.51 g and 8.80 g of, C, O and H, respectively. We know the molar mass of the compound, so we can work to solve the moles of each element.

In 100 g of compound we have 75.69 g C, 15.51 g O and 8.80 g H

In 412 g of compound we would have:

(412 . 75.69) / 100 = 311.8 of C

(412 . 15.51) / 100 = 63.9 g of O

(412 . 8.80) / 100 = 36.2 g of H

Now, we can determine the moles of each, that are contained in 1 mol of compound.

312 g / 12 g/mol 26 C

64 g / 16 g/mol = 4 O

36 g / 1 g/mol = 36 H

Molecular formula is C₂₆H₃₆O₄

4 0
3 years ago
Convert 122 moles of Methane to liters?
ANTONII [103]
122 moles of Methane to liters is 2734.5
5 0
3 years ago
Is density a direct or inverse function of the volume of an object?
marissa [1.9K]

The actual formula for volume for a cube is the length multiplied by the width and then multiplied by the height. Since all three measurements are the same, the formula results in the measurement of one side cubed. For the example, 5^3 is 125 cm^3. Multiply the volume by the known density, which is the mass per volume.

7 0
2 years ago
If Chris throws the baseball 60 meters in 4 seconds, what is the average speed of the football?
stealth61 [152]
60/4=15
so 15meters per second
4 0
3 years ago
Read 2 more answers
A solution of a salt of a weak acid HY is added to a solution of another weak acid HX. Based on the information given above, whi
Sloan [31]

Answer: the strongest base will be A) HX(aq)

Explanation:

The cationic part of the base is formed from the cation in the weak acidic salt solution, (say Na2CO3= HY, and H= Na) i.e H+, whereas the anionic part of the base comes from the the weak base ( say NH4OH= HX, and X= OH-)

Then the strong base formed will be HX

8 0
3 years ago
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