C) Elements combine in different ways to create many more than 92 compounds.
Explanation:
The number of elements we have relates to the compound formation in that, elements combine in different ways to create many more than 92.
Elements are distinct substances that cannot be split up into simpler substances. Such substances are only made up of one kind of atom.
Compounds are substances that are made up of two or more kinds of atoms joined together in a definite grouping.
- Several millions of compounds are known because elements can combine in different ways.
- The number of elements do not increase because new elements are discovered, it is because elements have several ways by they combine.
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hello! it is velocity.
i say this because, Inertia is the tendency of an object to resist changes in its state of motion. ... The state of motion of an object is defined by its velocity - the speed with a direction.
Is it a magnifying glass?
<span>average speed
= [(10-3)/12 km] / [(49.5-32.0)/60 hour]
= 5*7 / 17.5
= 2 km/h .</span>
Answer:
The thickness of the foil is 0.017 mm.
Explanation:
Given that,
Weight = 7.5 oz = 212.6175 gm
Density = 2.70 g/cm³
Area of aluminium = 50 ft² = 46451.52 cm²
We need to calculate the thickness of the foil
Using formula of density
Where, A = area
t = thickness
m = mass
Put the value into the formula
Hence, The thickness of the foil is 0.017 mm.
