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jasenka [17]
3 years ago
12

Which of the following describes a perpetual-motion machine?

Chemistry
2 answers:
makkiz [27]3 years ago
5 0

Answer:

a motor that requires no energy input once it is running

Mashutka [201]3 years ago
4 0

Answer:

c

Explanation:

a p e x :)

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Scientific models are based on a set of observations. true or false
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Question 3 (2 points)
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4 0
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5. How would you calculate the pH (NOT POH) of a base when given<br><br> the concentration of [OHJ?
PIT_PIT [208]

Answer:

pOH = -log₁₀ [OH-]

pH = 14 - pOH

Explanation:

First of all, calculate the value of pOH from  the hydroxide concentration do this using the equation below;

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3 0
3 years ago
Fill in the coefficients that will balance the following reaction: a0Na + a1H2O → a2NaOH + a3H2
Alexandra [31]
Hey there !  :

<span>2 Na + 2 H2O = 2 NaOH + 1 H<span>2

</span></span>Sodium<span> + </span>Dihydrogen Monoxide<span> = </span><span>Natriumhydroxid</span><span> + </span>Hydrogen

Coefficients:

Reagents  :  Na = 2
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Products :  NaOH = 2
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4 0
4 years ago
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