B. the digestive system
C. the urinary system
D. the circulatory system
Answer:
The answer is D, the circulatory system.
Explanation:
I got a a on the test
(2) C3H8(g) + 5 O2(g)--> 3 CO2(g) + 4 H2O(l)
(3) Zn(s) + 2 HCl(aq)--> ZnCl2(aq) + H2(g)
(4) BaCl2(aq) + Na2SO4(aq) --> BaSO4(s) + 2 NaCl(aq)
Answer : The correct option is, (1)
Explanation :
According to the Arrhenius acid-base concept,
Arrhenius acid is a species that produces ion in an aqueous solution and Arrhenius base is a species that produces
ion in an aqueous solution.
From the given options, option 1 chemical equation represents the reaction of an Arrhenius acid and an Arrhenius base. In this reaction, produces
ion in an aqueous solution and act as an Arrhenius acid,
produces
ion in an aqueous solution and act as an Arrhenius base.
While the other options does not represents the reaction of an Arrhenius acid and an Arrhenius base.
Reaction 2 is an example of combustion reaction.
Reaction 3 is an example of single-displacement reaction.
Reaction 4 is an example of double-displacement reaction.
Hence, the correct option is, (1)
- 20 points
B) Water would be able to dissolve all ionic compounds.
C) Water would not expand when it freezes.
D) Water would not exist on Earth.
The hydrogen bond is a secondary bond formed between a hydrogen (attached to an highly electronegative element ,: F, O or N) and another atom of an highly electronegative element ,: F, O or N.
In case of water hydrogen bond helps water
a) to dissolve certain substances which can make hydrogen bond
b) it makes it liquid and room temperature unlike H2S which is a gas at room temperature due to absence of hydrogen bond
c) higher volume and low density of ice as compared to liquid water. Due to hydrogen bond ice forms open cage like structure which increases its volume and decreases its density. Thus water expands on freezing
So in absence of hydrogen bond Water would not expand when it freezes.
The answer is 3/2 the original pressure. The concept behind this is the ideal gas law wherein it states that Pressure (P) times volume(V) is equal to number of moles (n) times ideal gas constant (R ) times temperature (T). Since you’re trying to calculate for the pressure you use P=nRT/V. Input 3 to Temperature and 2 to volume. You’ll get a pressure of 3/2 which is 3/2 times the original pressure.
Explanation:
There are many examples of chemistry in daily life showing how important chemistry is. For example digestion is based on chemical reaction. In our morning routine we brush our teeth by paste that is a chemical, the soap or shampoo we use is also a chemical. The process of making food is also chemistry that involve chemical reaction.