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snow_lady [41]
3 years ago
13

3. Convert 0.45 g of sodium hydroxide, NaOH to moles.

Chemistry
2 answers:
natima [27]3 years ago
8 0

Answer:

*

Explanation:

Irina-Kira [14]3 years ago
3 0

Answer:

0.01125

Explanation:

given mass / molar mass

0.45/40

0.01125

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The atomic number of an atom is always equal to the total number of
kobusy [5.1K]
Protons in the nucleus
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3 years ago
What is the maximum mass of ethyl alcohol you could boil with 1000 j of heat, starting from 20°c?
allochka39001 [22]

The amount of maximum mass of ethyl alcohol that could we boil with 1000 J of heat, starting from 20°C is 7.08 grams.

<h3>How do we calculate the mass?</h3>

Mass of the ethyl alcohol will be calculated by using the below equation as:

Q = mcΔT, where

  • Q = absorbed heat = 1000 J
  • m = mass of ethyl alcohol = ?
  • c = specific heat of ethyl alcohol = 2.42 J/g.°C
  • ΔT = change in temperature = (78.37°C - 20°C) = 58.37°C

On putting all these values, we get

m = 1000 / (2.42)(58.37) = 7.079 = 7.08g

Hence required mass of ethyl alcohol is 7.08grams.

To know more about absorbed heat, visit the below link:
brainly.com/question/16559442

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6 0
3 years ago
2. Classify each of the following reactions as a
fgiga [73]

Answer:

a. Synthesis reaction

b. Single - Displacement

c. Decomposition reaction

d. Combustion Reaction

Explanation:

N_{2} + 3H_{2}\rightarrow 2NH_{3}

Synthesis reaction: Reaction in which two or more substance combine to give a single compound.

Li + H_{2}O\rightarrow LiOH +H_{2}

Single - Displacement : Reaction in which the more reactive element displaces the less reactive element.Here Li replace OH from water.

NaNO_{3}\rightarrow NaNO_{2}+ O_{2}

Decomposition reaction: Reaction in which a single reactant decompose to give two or more products.

CH_{4} + O_{2}\rightarrow CO_{2}+H_{2}O

Combustion Reaction : IT is a redox reaction in which a substance is burned in the presence of oxygen to give carbon dioxide and water.

3 0
3 years ago
If 298 g of water is contained in a 292 g aluminum vessel at 9◦c and an additional 138 g of water at 82◦c is poured into the con
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Co2 is correct buddy
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3 years ago
What units express specific heat capacity
Arisa [49]
It is denotares as c or sometimes C, depending on how the substance is measured. The SI units for specific heat are J/(kg.K)
8 0
4 years ago
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