In the scientific method, why is it important to keep track of data?

Chemistry

2 answers:

LuckyWell [14K]3 years ago

5 0

So you can compare them with the results at the end

zvonat [6]3 years ago

4 0

Everything compares at the end

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(Direct answer=Upvote cause I aint smart xD)

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Classify the following as a heterogeneous, homogeneous, or a pure substance:

Hunter-Best [27]

Answer:

pretty sure it's heterogeneous

Explanation:

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What is the mass of a sample of water that takes 2000 kJ of energy to boil into steam at 373 K. The latent heat of vaporization

zzz [600]

Answer:

$\boxed{\text{889 g}}$

Explanation:

The formula relating the mass m of a sample and the heat q to vaporize it is

q = mL, where L is the latent heat of vaporization.

$\begin{array}{rcl}2000 \times 10^{3} \text{ J} & = & m \times \dfrac{2.25 \times 10^{6} \text{ J}}{\text{1 kg}}\\\\m & = & \dfrac{2000 \times \times 10^{3}\text{ kg}}{2.25 \times 10^{6}}\\ & = & \text{0.889 kg}\\\\ & = & \text{889 g}\\\end{array}\\\text{The mass of water is $\boxed{\textbf{889 g}}$}$

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3 years ago

PLEASE HELP

Olenka [21]

There is no reaction because of the common ion effect(which in this case is K)if there were a reaction the products would be the same as the reactants so no reaction happens

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3 years ago