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4 years ago

Determine the density in g/cm3 of a mineral that has a volume of 3.8 cm3 and a mass of 22.4 g.

Mathematics

1 answer:

kherson [118]4 years ago

4 0

Answer:

5.89 g/cm³

Step-by-step explanation:

givens,

Mass = 22.4 g

volume = 3.8 cm³

Density = mass / volume

= 22.4 / 3.8

= 5.89 g/cm³

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One thousand tonnes (1000 t, one t equals 10 cubed kg) of sand contains about a trillion (10 super 12) grains of sand. How many

Phantasy [73]

Answer with Step-by-step explanation:

Since 1 mole of sand will contain Avagadro's Number of sand particles (by definition of 1 mole)

Thus we have

1 mole of sand = $6.022\times 10^{23}$ sand particles

Thus in number of trillion sand particles we have no of trillion sand particles in 12 mole is

$\frac{6.022\times 10^{23}}{10^{12}}=6.022\times 10^{11}$

Now since it is given that mass of 1 trillion sand particles is 1000 tonnes Thus the mass of $6.022\times 10^{11}$ trillion sand particles is

$Mass=1000\times 6.022\times 10^{11}=6.022\times 10^{14}tonnes$

Part 2)

Since it is given that volume of 1 sand particle is $1.0mm^{3}$ thus the volume of 1 mole of sand is volume of $6.022\times 10^{23}$ sand particles

Thus volume of 1 mole is $V=1.00\times 10^{-18}km^{3}\times 6.022\times 10^{23}=6.022\times 10^{5}km^{3}$

Now since the Area of united states is $A=3.6\times 10^{6}mile^{2}=5.8\times 10^{6}km^{2}$

Thus the depth of the sand pile is

$Depth=\frac{Volume}{Area}=\frac{6.022\times 10^5}{5.8\times 10^6}=0.10387km=103.8meters$

4 0

3 years ago

Cos6x + cos2x + 2cos4x

Troyanec [42]

Step-by-step explanation:

everything can be found in the picture

6 0

3 years ago

Identify the mixed number for the picture shown. A. 2 1⁄4 B. 11⁄2 C. 2 1⁄2 D. 3

snow_lady [41]

Answer:

A and C are mixed numbers

Step-by-step explanation:

A mixed number is a whole number with a fraction.
Correct Example: three and three-fourths is a mixed number.
Incorrect Example: Three is not a mixed number.

4 0

3 years ago

Read 2 more answers

F(x)=2x^2+4x+5<br> Find : f(a)=

VladimirAG [237]

Answer:

f(a) = 2a^2 + 4a + 5

Step-by-step explanation:

You just need to replace the "x" with the "a".

7 0

4 years ago

Carly opened 20 gifts on her birthday. Of these gifts, 4 were clothes, 13 were toys and 3 were books. According to these results

Elanso [62]

Answer:

65%

Step-by-step explanation:

Times 13 by 5 65 Number of toys

Times 4 by 5 20 Number of clothing

Times 3 by 5 15 Number of books

7 0

3 years ago