How do you know how many sig figs A number has?

How do you know how many sig figs A number has? To determine the number of significant figures in a number use the following 3 rules: Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant. Are sig figs […]

What is a disadvantage of hydrogen fuel cells?

What is a disadvantage of hydrogen fuel cells? There are disadvantages to using hydrogen-oxygen fuel cells in cars. These include: hydrogen is in the gas state at room temperature and pressure, so it is difficult to store in the car. fuel cells and electric motors are less durable than petrol engines and diesel engines, so […]

What time of day are shadows the longest?

What time of day are shadows the longest? Shadows are longest in the early morning and late afternoon/early evening when the sun appears low in the sky. As the Earth rotates on its axis, the sun hits each location in the morning at an angle. This becomes more vertical as the sun appears to pass […]

What is a piece of cosmic debris on Earth called?

What is a piece of cosmic debris on Earth called? It also contains countless asteroids and comets – the debris of the cosmic construction site that created the planets and their moons. The majority of Solar System asteroids populate the main asteroid belt, lying between the orbit of Mars and Jupiter. How much space debris […]

How development is both qualitative and quantitative?

How development is both qualitative and quantitative? Development is the combination of qualitative and quantitative process of growing or causing something to grow or become larger or more advanced. The term ‘growth’ and ‘development’ are not new but refer to changes over a period of time. Is Child Development continuous or discontinuous? Continuous development sees […]

What is the ratio of molecules in 1 mole?

What is the ratio of molecules in 1 mole? 1 mole of any compound is the Avogadro’s number, 6.023×1023 . And, 1 mole of HNO3 = 6.023×1023 molecules. Now, both compounds have the same number of molecules. The ratio of molecules between both the compounds is 1:1 . Which is the correct formula to calculate […]

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