All categories

4 years ago

How many 1-cm cubes would it take to construct a cube that is 4 cm on edge? Express your answer using two significant figures.

Chemistry

1 answer:

Firlakuza [10]4 years ago

7 0

Answer:

It would take 64 1-cm cubes to construct a 4-cm cube.

Explanation:

The volume of a cube is equal to the edge raised to the power of 3.

A 1-cm edge cube has a volume of V₁ = (1 cm)³= 1 cm³

A 4-cm edge cube has a volume of V₄ = (4 cm)³= 64 cm³

The number of small cubes required to fill the same volume than the big cube is:

$\frac{V_{4}}{V_{1}} =\frac{64 cm^{3} }{1cm^{3} } =64$

You might be interested in

you are given an unknown gaseous binary compound. when 10.0g of the compound isburned in excess oxygen, 16.3g of water is produc

Flauer [41]

Since the compound has 1.38 time that of oxygen gas at the same conditions of temperature and pressure, we have the relationship:
MW/MWoxygen = 1.38
MW = 44.16

Since there is water formed during the reaction, the formula of the compound must be:
XaHb
where a and b are the coefficients of each element.

If the compound reactions with oxygen forming water and an oxide of the element X, the combustion reaction must be:
XaHb + ((2a + (b/2))/2) O2 = a (XO2) + (b/2)(H2O)
Using dimensional analysis:
10 (1/44.16) (b/2 / 1) (18) = 16.3
Solving for b:
b = 8

The compound now is XaH8. Most probably, the compound is C3H8 since it has a molecular formula of 44 and it reacts with O2 to form water and CO2.

5 0

4 years ago

How many stars are in the constellation Andromeda? hellllp i give brainlyst!

soldi70 [24.7K]

Answer:

51 stars it said i needed 20 characters because my answer was too short

so yeah.

3 0

3 years ago

Read 2 more answers

Which of the following is NOT and example of a mixture?* air salt and pepper water

Lelechka [254]

Answer:

water because the other two were formed through a chemical process

5 0

3 years ago

4. The heat of

Reika [66]

It is 2 KJ

It is because the formula is :

q=m∆Hf

where m is the mass and ∆Hf is the heat fusion.

So, we get:

q=80×25

q=2000J or 2 KJ

8 0

3 years ago

Using what you know about the periodic table, list some patterns that organize the elements in terms of atomic number, atomic ma

Sindrei [870]

Answer:

yes

Explanation:

yes they're very common.

5 0

3 years ago