Although incineration can break down harmful chemicals, the byproduct is hazardous.a. True
b. False

Answers

Answer 1

Answer:

Answer: The given statement is true.

Explanation:

Incineration: It is a technique in which organic substance present in waste material is burned down to break them into its components.

For: Example : Burning of powder of wooden chips gives carbon dioxide gas ,nitrogen-dioxide in small amounts and heat energy.

Although incineration can break down harmful chemicals but the by-product formed are hazardous because:

Oxides of nitrogen and sulfurs are also released which pollutes the air and becomes the main cause for acid rains.
Green house gases are produced which disturbs the balance of atmosphere and climate.
Increases air pollution by which it becomes unfit to breathe in.
Also pollutes soil.

Hence, the given statement is true.

Answer 2

Answer: A, true is the answer and cluke u help me please

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A 10.0-milliliter sample of NaOH(aq) is neutralized by 40.0 milliliters of 0.50 M HCl. What is the molarity of the NaOH(aq)?(1) 1.0 M (3) 0.25 M(2) 2.0 M (4) 0.50 M

What is the valency & molecular formula of sulphate?

Answers

Explanation:

Let's consider sulphate radical, the chemical formula is given by SO42−. Here we can see there is a -2 charge on SO4, which means it has -2 valency. Now look at the option (a), phosphate can be written as PO43−. There is -3 charge on PO4, that means it has -3 valency.

Explanation:

molecular formula of sulphate ion is SO₄²⁻

and

the valency of sulphate ion is 2.

All of the following are part of the digestive system except the __________.Select one of the options below as your answer:a. stomach
b. esophagus
c. intestines
d. heart

Answers

D. HeartThe esophagus pushes the food from your mouth to your stomach which digests your food and sends it into the small intestine for even further digestion. The heart has nothing to do with this process of digestion. It pumps blood through your body in the circulatory system

d. heart is the correct answer because heart is a part of circulatory system~

11. The respiration rate of a goldfish ismeasured. The goldfish is then placed in
cold water and the respiration rate is
measured again.

Answers

Answer:

the respiration rate is the independent varaible ,measured is the indpendent variable i think

Explanation:

The nucleus of a radium-226 atom is unstable, which causes the nucleus to spontaneously(1) absorb electrons (3) decay
(2) absorb protons (4) oxidize

Answers

Answer: The nucleus of radium-226 is unstable and hence undergoes decay.

Explanation: Radium has many isotopes. One of them is $_(88)^(226)\textrm{Ra}$ which has 88 protons and 138 neutrons. It is a radioactive isotope and undergoes decay process.

This isotope undergoes alpha - decay and produces Radon-222 isotope.

Equation for alpha - decay follows:

$_(88)^(226)\textrm{Ra}\rightarrow _(86)^(222)\textrm{Rn}+_2^4\alpha$

Hence, the nucleus of radium-226 undergoes decay process.

The answer is (3) decay. An atom whose nucleus is unstable is said to be "radioactive," and its nucleus undergoes nuclear decay.

What is the mass (in grams) of 1.95 moles of water

Answers

Answer:

35.10 g is the mass of 1.95 moles of water.

Explanation:

Moles of water = 1.95 mol

Mass of 1 mol of water = 18 g

Then the mass of 1.95 moles of water:

Mass of 1.95 mol = $1.95* 18 g = 35.10 g$

35.10 g is the mass of 1.95 moles of water.

Given:
1.95 moles of H20

Required:
mass in grams

Solution:
The molar mass of water is 18.02 grams per mole

1.95 moles of water (18.02 grams / mole of water) = 35.1 grams of water

A serious risk factor associated with the operation of a nuclear power plant is the production of(1) acid rain
(2) helium gas
(3) greenhouse gases, such as CO2
(4) radioisotopes with long half-lives

Answers

Answer: Option (4) is the correct answer.

Explanation:

In a nuclear power plant, nuclear fission and fusion reactions occur.

During these reaction a large amount of heat is releases along with the release of radioisotopes. These radioisotopes have long half-lives as a result these emit harmful radiations which can either cause burns or blindness to the people around the nuclear power plant etc.

For example, isotope of Uranium-238 have longer half life.

Thus, we can conclude that a serious risk factor associated with the operation of a nuclear power plant is the production of radioisotopes with long half-lives.

Final answer:

The major risk associated with the operation of nuclear power plants is the generation of radioisotopes with long half-lives, such as cesium-137 and strontium-90. These remain harmful for thousands of years.

Explanation:

A serious risk factor associated with the operation of a nuclear power plant is the production of radioisotopes with long half-lives. Apart from the immediate dangers posed by nuclear accidents, these radioisotopes, such as cesium-137 and strontium-90, remain radioactively harmful for a long period of time, often thousands of years. Safe containment and disposal of these substances is a significant challenge associated with nuclear energy production.

In contrast, acid rain is generally caused by burning fossil fuels, not nuclear power. Nuclear power plants do not produce significant amounts of greenhouse gases such as CO2. Helium gas is one of the byproducts of nuclear fusion, not fission, which is used in nuclear power plants, and is not dangerous.