Answer:
Mass of water produced= 1.8 g
Explanation:
Given data:
Mass of water produced = ?
Mass of butane = 1.36 g
Mass of oxygen = excess
Solution:
Chemical equation:
2C₄H₁₀ +13 O₂ → 8CO₂ + 10H₂O
Number of moles of butane:
Number of moles = mass/molar mass
Number of moles = 1.36 g/ 58.12 g/mol
Number of moles = 0.02 mol
Now we will compare the moles of butane with water.
C₄H₁₀ : H₂O
2 : 10
0.02 : 10/2×0.02 = 0.1 mol
Mass of water produced:
Mass = molar mass × molar mass
Mass = 0.1 mol × 18 g/mol
Mass = 1.8 g
Answer:
B. salt dissolved in water
Explanation:
a mixture is multiple substances mixed together
The overall order of a reaction is directly
related to the reaction mechanism of the reaction. The reaction mechanism is
defined by the reaction rate equation. In this case, we are given by the
equation, Rate=k. The order of this reaction is zero since the rate is
not dependent on the concentration of reactants or products.
Answer: The chemical formula of this precipitate is 
.
Explanation:
An equation which depicts the chemical reaction of substances in the form of chemical formulas is called a chemical equation.
For example, chemical equation for an aqueous solution of sodium phosphate 
and an aqueous solution of magnesium sulfate 
are mixed, a precipitate forms is as follows.
Here, trimagnesium phosphate is the precipitate. The chemical formula of this precipitate is .
Thus, we can conclude that the chemical formula of this precipitate is .
Answer:
Alloy
Explanation:
Alloy: An alloy is a substance prepared by adding one or more element to a base or parent metal to obtain desirable products. The added element are usually metals or carbon. An alloy can be considered as a uniform mixture.
Examples of Alloy:
⇒ Brass is an alloy that contains 60 - 80% of copper and 20- 40% of zinc.
⇒Bronze is an alloy that contains 90% of copper and 10% of tin.
⇒ Steel is an alloy that contains 99.8% of iron and 0.2% of carbon.
Uses of Alloys:
⇒ They are used for making coins and medals
⇒ They are used in the construction of aircraft, ships and cars.
⇒They are used for making electromagnet.
