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user100 [1]
3 years ago
14

Alexander is measuring the width of objects. The smallest measurement his ruler displays is centimeters. Rather than

Chemistry
1 answer:
Bogdan [553]3 years ago
8 0

Answer:

There can be error in millimetres.

Explanation:

The rounding off can create errors in exact measurement. There can be errors in the measured value and actual measurement of the object. Alexander has rounded his calculation to nearest centimetre then it is possible he can make errors in millimetre calculations. The measured width of the object will not be the actual measurement and it might differ slightly.

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Explain the role of gravity in the waterfall.
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Explanation:

A water fall falls and hits the base with force depending on the distance from which it fell.This force is caused by gravity pulling the water molecule as well as some other particles like eroded soil rapidly downwards.

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3 years ago
Granitic igneous rocks are all of the following EXCEPT ____.
baherus [9]

Answer:

D, high in iron content

Explanation:

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LOSPICNOMEWTROS SON INSTRUMENTOS EMPLEADOS PARA CALCULAR DENSIDADES DE SUSTANCIAS LIQUIDAS. SE REALIZO UN EXPERIMENTO PARA DETER
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Answer:

0.66g/mL

Explanation:

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En este problema, podemos hallar la densidad sabiendo que la diferencia de masas del pic vacío y el pic lleno es la masa de la solución y que el volumen que ocupa es de 25mL:

<em>Masa solución:</em>

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Así, la densidad será:

16.5g / 25mL =

<h3>0.66g/mL</h3>
3 0
3 years ago
Which cells contain this <br> organelle: plant cells, animal cells, or both?<br> ​blank
ser-zykov [4K]

Answer:

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1 year ago
phosporus can be prepared from calcium phosphate by the following reaction: 2Ca3(PO4)2+6SiO2+10C → 6CaSiO3+P4+10CO Phosphorite i
morpeh [17]

Answer:

285 g of P₄

Explanation:

Let's consider the following balanced equation.

2 Ca₃(PO₄)₂ + 6 SiO₂ + 10 C → 6 CaSiO₃ + P₄ + 10 CO

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Then, for 1.9 kg of phosphorite:

1900g(phosphorite).\frac{75gCa_{3}(PO_{4})_{2}}{100g(phosphorite)} .\frac{1molCa_{3}(PO_{4})_{2}}{310gCa_{3}(PO_{4})_{2}} .\frac{1molP_{4}}{2molCa_{3}(PO_{4})_{2}} .\frac{124gP_{4}}{1molP_{4}} =285gP_{4}

6 0
3 years ago
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