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Dima020 [189]
3 years ago
15

Thanks in advance ❤❤❤❤❤❤​

Chemistry
2 answers:
yaroslaw [1]3 years ago
8 0

Answer:

m<_=9

Explanation:

it is because when 18 is ÷by 2 it give 9

lesantik [10]3 years ago
4 0

Answer:

A

Divide both sides by 2

m ≤9

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Find the density.... Mass is 138g and Volume is 100 mL​
solniwko [45]

Answer:

1380 kilogram/cubic meter

p=\frac{m}{v}

=\frac{138g}{100mL}

=1.38

=1380

4 0
3 years ago
The following thermochemical equation is for the reaction of Fe 3 O 4 (s) with hydrogen (g) to form iron and water vapor Fe 3 O
Mila [183]

Answer:

41.3kJ of heat is absorbed

Explanation:

Based in the reaction:

Fe₃O₄(s) + 4H₂(g) → 3Fe(s) + 4H₂O(g) ΔH = 151kJ

<em>1 mole of Fe3O4 reacts with 4 moles of H₂, 151kJ are absorbed.</em>

63.4g of Fe₃O₄ (Molar mass: 231.533g/mol) are:

63.4g Fe₃O₄ × (1mol / 231.533g) = <em>0.274moles of Fe₃O₄</em>

These are the moles of Fe₃O₄ that react. As 1 mole of Fe₃O₄ in reaction absorb 151kJ, 0.274moles absorb:

0.274moles of Fe₃O₄ × (151kJ / 1 mole Fe₃O₄) =

<h3>41.3kJ of heat is absorbed</h3>

<em />

6 0
3 years ago
Calcula la densidad de un cuerpo que tiene la masa de 12g y un volumen de 3cm^3 dar el resultado en unidades del SI
kvv77 [185]

The density is 4 g/cm³ or 4000 kg/m³.

Density = mass/volume = 12 g/3 cm³ = 4 g/cm³

The measurement of 4 g/cm³ is already in <em>SI units</em>.  

In SI <em>bas</em>e units,  

Density = (4 g/1 cm³) × (1 kg/1000 g) × (100 cm/1 m)³ = 4000 kg/m³


3 0
3 years ago
Order the following from smallest to largest. Place the smallest value at the top of your list.
BlackZzzverrR [31]

Answer:

  1. 100g
  2. 1.000.000mg
  3. 10 kg

Explanation:

1.000.000mg = 1,000 g =1kg

100g =.01kg

10 kg

5 0
3 years ago
Read 2 more answers
Explain how a water strider can float on the surface of water without sinking.
Rainbow [258]

Answer:

low weight and great area

Explanation:

8 0
3 years ago
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