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marshall27 [118]
3 years ago
11

2.524 g (5.1 × 106 g) ÷ (6.85 × 103 g) = ? How many significant figures should the result have?

Chemistry
2 answers:
irina1246 [14]3 years ago
6 0
The correct answer is Three. Solving the given expression we get,

2.524 g (5.1 × 106 g) ÷ (6.85 × 103 g) = 1364.47÷ (6.85 × 103 g) = 1364.47÷ 705.55 = 1.93 
Here, the number of significant figures is three. Thus, the result should have three <span>significant figures.</span>
devlian [24]3 years ago
4 0

<u>Explanation:</u>

To solve the equation, we will first multiply the numerator and denominator separately and then divide it, to attain the final result.

The equation given is:

2.524g(5.1\times 106g)\div (6.85\times 103g)=1364.4744g^2\div 705.55g\\\\\Rightarrow 1.933\approx 1.9

Whenever multiplication and division are involved, the answer must not contain, more number of significant figures as there are in the least precise term.

Of all the given terms, the least precise number has 2 significant numbers. Therefore, the answer  would have 2 significant figures and the final answer will be 1.9

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5 0
3 years ago
A block of iron has a mass of 826 g. What is the volume of the block of iron whose density at 25°C is 7.9 ?
kolezko [41]

Answer:

104.56cm³

Explanation:

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Density =7.9g/cm³

Volume =Mass /Density

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2 years ago
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Which biogeochemical cycle is the only one that does not include the atmosphere?
In-s [12.5K]

Answer:

Phosphorus cycle

Explanation:

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Carbon cycle is the cycle in which photosynthesis and cellular respiration take place.

Water cycle involves transpiration.

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romanna [79]

There are 34 g of oxygen in the container.

We can use the<em> Ideal Gas Law</em> to solve this problem.

pV = nRT

But n = \frac{m}{M}, so

pV = \frac{m}{M}RT and

m = \frac{pVM}{RT}\\

STP is 0 °C and 1 bar, so

m = \frac{\text{1 bar} \times \text{24 L} \times 32.00 \text{ g}\cdot\text{mol}^{-1}}{\text{0.083 14 } \text{bar}\cdot\text{L}\cdot\text{K}^{-1}\text{mol}^{-1}\times\text{273.15 K} } = \textbf{34 g}\\

7 0
3 years ago
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