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3 years ago

Explain the concept: Law of Multiple Proportions. Short and simple please

2 answers:

6 0

When 2 elements combine to form more than one compound. The weight of one element combines with a different weight of the other element then are in a ratio of small whole numbers

cricket20 [7]3 years ago

4 0

In chemistry the law of multiple proportions states that if two elements from more than one compound between them then the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers .

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What is the mass of a sample of water that takes 2000 kJ of energy to boil into steam at 373 K. The latent heat of vaporization

zzz [600]

Answer:

$\boxed{\text{889 g}}$

Explanation:

The formula relating the mass m of a sample and the heat q to vaporize it is

q = mL, where L is the latent heat of vaporization.

$\begin{array}{rcl}2000 \times 10^{3} \text{ J} & = & m \times \dfrac{2.25 \times 10^{6} \text{ J}}{\text{1 kg}}\\\\m & = & \dfrac{2000 \times \times 10^{3}\text{ kg}}{2.25 \times 10^{6}}\\ & = & \text{0.889 kg}\\\\ & = & \text{889 g}\\\end{array}\\\text{The mass of water is $\boxed{\textbf{889 g}}$}$

5 0

2 years ago

What Group is Zn (zinc) in?<br> O A. 4<br> O B. 2A<br> O C. 12<br> O D. 30

Oxana [17]

I believe it’s (C.12)

3 0

3 years ago

Calculate the mass of butane needed to produce 97.4 g of carbon dioxide. Express your answer to three significant figures and in

Vsevolod [243]

Answer:

32.1 g

Explanation:

Step 1: Write the balanced combustion reaction

C₄H₁₀ + 6.5 O₂ ⇒ 4 CO₂ + 5 H₂O

Step 2: Calculate the moles corresponding to 97.4 g of CO₂

The molar mass of CO₂ is 44.01 g/mol.

97.4 g × 1 mol/44.01 g = 2.21 mol

Step 3: Calculate the moles of butane that produced 2.21 moles of carbon dioxide

The molar ratio of C₄H₁₀ to CO₂ is 1:4. The moles of C₄H₁₀ required are 1/4 × 2.21 mol = 0.553 mol

Step 4: Calculate the mass corresponding to 0.553 moles of C₄H₁₀

The molar mass of C₄H₁₀ is 58.12 g/mol.

0.553 mol × 58.12 g/mol = 32.1 g

4 0

2 years ago

Which property do metalloids share with nonmetals

Strike441 [17]

Answer:

Metalloids are brittle like nonmetals.

Explanation:

I'm sorry if i'm wrong but this question is a week old so i figured i'd answer it.

8 0

2 years ago

In a hydrogen-oxygen fuel cell, A) no transfer of electrons occurs.B) both oxygen and hydrogen atoms lose electrons.C) both oxyg

avanturin [10]

Answer:

oxygen atoms gain electrons and hydrogen atoms lose electron

Explanation:

Hydrogen oxygen fuel cell involves redox reactions.

It is an electrochemical cell, which is used for many applications like rocket propellant.

The actual reaction is

$H_{2}+\frac{1}{2}O_{2}--->H_{2}O$

Here hydrogen undergoes oxidation as it loses electrons

Oxygen undergoes reduction as it gains electrons.

The redox reactions are

At anode:

$H_{2}--->2H^{+}+2e$ [loss of electrons by hydrogen]

At cathode:

$O_{2}+4H^{+}+4e--->2H_{2}O$ [gain of electrons by oxygen]

6 0

3 years ago