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nikitadnepr [17]
3 years ago
12

PLEAEEEE HELPPP

Chemistry
1 answer:
alexgriva [62]3 years ago
8 0
Speed is a scalar quantity( quantity having only magnitude). So it doesn't specifies direction. Hence option C.) 5Km/hr north is incorrect.
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The electron and proton numbers.

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Photosynthesis happens in the _____
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The shorter an elecrtomagnetic waves wavelength, the ___
grandymaker [24]
<h3>Answer:</h3>

The higher is its frequency.

<h3>Explanation:</h3>
  • Electromagnetic waves are types of waves that do not require a material medium for transmission.
  • They include radio waves, microwaves, infra-red and gamma rays among others.
  • Frequency refers to the number of complete oscillations in one second while wavelength is the distance between two successive crests or trough in a transverse wave.
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7 0
3 years ago
What mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 of water
Luba_88 [7]

The mass, in grams, of hydrogen that would be produced from the reaction will be 0.102 grams

<h3>Stoichiometric calculations</h3>

From the balanced equation of the reaction:

Mg + 2H_2O -- > Mg(OH)_2 + H_2

The mole ration of magnesium to water is 1:2.

Mole of 4.73 grams Mg = 4.73/24.3 = 0.195 moles

Mole of 1.83 grams water = 1.83/18 = 0.102 moles

Hence, water is limiting.

Mole ratio of water to the hydrogen produced = 2:1

Equivalent mole of hydrogen gas produced = 0.102/2 = 0.05 moles

Mass of 0.05 moles hydrogen gas = 0.05 x 2 = 0.102 grams

More on stoichiometric calculations can be found here: brainly.com/question/27287858

#SPJ1

4 0
2 years ago
If a car jack's output force is 1000 N and the mechanical advantage is 6.8, what is the input force?
Travka [436]
Answer
147.06N
Explanation:
MA=Load/Effort
6.8=1000/x
Finding x you make x the subject and divide 1000 by 6.8 which is 147.06N
4 0
2 years ago
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