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3 years ago

HELP ASAPP PLZZZ I WILL GIVE YOU 50 POINTS

Chemistry

2 answers:

Sedaia [141]3 years ago

8 0

Answer:

Explanation:

I would not classify it as acid rain because an acidic pH is anything lower than 7. The question says the pH is 7.2 which is close to a neutral pH and also typical acid rain has a pH value of 4.0 so your sample probably isn't acid rain.

As far as environment, acid rain removes minerals and nutrients from the soil that trees need to grow, therefore dying plants or trees are common in areas where acid rain is frequent.

As far as human health, things that make acid rain such as sulfur dioxides and nitrogen oxides tend to have an enormous effect on our respiratory and cardiovascular health. These particles that make acid rain can cause heart attacks resulting in death for people with increased heart disease risk, and effects on lung function, such as breathing difficulties for people with asthma.

Karolina [17]3 years ago

7 0

Explanation:

nahh.. the rain is not an acid rain.. acidic rain/water etc Ph level is below 7.. 7.2 is still considered normal.. as for the effect for the human health, it do not cause direct effect as it is not acidic enough. as for the environment, it may cause harm to the ecosystem. for example, the declination of a species of fish etc

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cyclohexanol is burned as a fuel, according to the following equation, how many moles of oxygen are needed to produce 13.7 mol o

lidiya [134]

The moles of oxygen that are needed to produce 13.7 moles of carbon dioxide is 21.17 moles of Oxygen

calculation

2 C₆H₁₂O + 17 O₂ → 12 CO₂ +12 H₂O

The moles of O₂ is determined using the mole ratio

that is for given equation above O₂ : Co₂ is 17 :12

therefore the moles of O ₂= 13.7 moles x 17/12 =21.17 moles

3 0

3 years ago

PLEASE ANSWER FAST

worty [1.4K]

C is the answer.
The temperature T in degrees Celsius (°C) is equal to the temperature T in Kelvin (K) minus 273°.

6 0

3 years ago

Read 2 more answers

What are the reactants and products when butane combusts with excess oxygen?

larisa86 [58]

C3H8 + O2 --> CO2(g) + H2O(g) + energy(heat)

butane + oxygen --> carbon dioxide + water + heat

7 0

3 years ago

With reference to He-4 (or the diagram), explain the term isotopes.

boyakko [2]

Answer:

Isotopes are basically atoms of an element that have an unequal number of neutrons and protons. Of course the proton number remains the same, but the neutron number either decreases or increases, which leads to an overall change in mass. However, no chemical properties of the atom/element are changed as the electrons are the same number and do not react. In regards to Helium 4, the original number of neutrons in Helium is 2, and protons 2 as well. We see an equal number of neutrons and protons, hence an unchanged mass, and the element is not an isotope.

6 0

3 years ago

T/F___ At the eutectic composition, an alloy can solidify at a constant temperature.___ For effective dispersion strengthening,

azamat

Answer:

TRUE
FALSE
TRUE
FALSE
FALSE
TRUE

Explanation:

At the eutectic composition, an alloy can solidify at a constant temperature : TRUE . this is because at eutectic composition the type of reaction that takes place there is invariant reaction in its thermal equilibrium
For effective dispersion strengthening, the dispersed phase should be needle-like, as opposed to round : FALSE. because the rounded shape will not cause a crack.
Intermetallic compounds are usually hard and brittle : TRUE. because Intermetallic compounds prevents dislocation movements and this makes them brittle and hard
For the effective dispersion and strengthening, the dispersed phase should be continuous : FALSE. this is because the dispersed precipitate must be small and not continuous
Stoichiometric intermetallic compounds exist over a range of compositions : FALSE
Faster solidification results in smaller interlamellar spacing : TRUE

4 0

3 years ago