All categories

3 years ago

Select all the correct answers.

Chemistry

2 answers:

balu736 [363]3 years ago

7 0

Answer:photosynthesis by plants

absorption of CO2 from the atmosphere by ocean water

Explanation:

Photosynthesis involves the combination of CO2 with water to form glucose and subsequently complex carbohydrates. Plants constitute a very important sink for carbon IV oxide in nature. Secondly, oceans absorb carbon IV oxide to maintain the concentration of bicarbonate in the water. These are two important natural methods that remove CO2 from the environment.

Archy [21]3 years ago

4 0

Answer:

The natural method of removal of CO2 is

Photosynthesis by plants

Absorption of CO2 from the atmosphere by ocean water

Melting of glacial ice

Explanation:

Respiration of living organism : In this process, Oxygen is consumed(removed) and Carbon dioxide(CO2 ) is formed.So it forms CO2 .

Photosynthesis by plants: Green plant containing. prepare their food in presence of sunlight by using CO2 , water ,Hence CO2 is removed from atmosphere.

Evaporation of ocean water : It increases the level of CO2 in atmosphere. The heating of oceans surface Degassed CO2 to atmosphere.

Absorption of CO2 from the atmosphere by ocean water : the plants under the oceans needs CO2 to carry out photosynthesis .Hence oceans absorbs CO2 from atmosphere .Here, CO2 is removed from atmosphere.

Melting of glacial ice : Glacial ice absorb carbon dioxide because it does not have organism respiration (organisms releasing CO2 ).They capture large amount of CO2 and called CO2 sinks.(Remove CO2)

You might be interested in

You've just solved a problem and the answer is the mass of an electron, me=9.11×10−31kilograms. How would you enter this number

mihalych1998 [28]

The mass of an electron can be expressed in the box as $\boxed{{m_e} = 9.1 \times {{10}^{ - 31}}{\text{ kg}}}$ .

Further explanation:

Atom is the smallest particle that can be present in any element. It is also known as the building unit of matter. Each atom has a central part that is known as the atomic nucleus. There are three subatomic particles that constitute the atom. These particles are protons, neutrons, and electrons. The atomic nucleus consists of protons and neutrons, both are collectively called nucleons. Electrons revolve around the nucleus of an atom in definite orbits.

Protons are positively charged subatomic particles, electrons are negatively charged and neutrons have no charge. Since electrons carry a unit negative charge, these create an electric field around them. These also participate in nuclear reactions. The mass of an electron $\left( {{m_e}} \right)$ is $9.1 \times {10^{ - 31}}{\text{ kg}}$ , that of protons is $1.6726219 \times {10^{ - 27}}{\text{ kg}}$ and that of neutrons is $1.674927471 \times {10^{ - 27}}{\text{ kg}}$ . The electrons are responsible for chemical properties of elements. The distribution and arrangement of electrons is used to predict whether the element will be inert or reactive.

Therefore the required answer is $\boxed{{m_e} = 9.1 \times {{10}^{ - 31}}{\text{ kg}}}$ .

Learn more:

Component of John Dalton’s atomic theory: brainly.com/question/2357175
Basis of investigation for the scientists: brainly.com/question/158048

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Atomic structure

Keywords: atom, matter, atomic nucleus, proton, electron, neutron, subatomic particle, nuclear reactions, electric field, reactive, inert.

4 0

4 years ago

What is the affected variable in an experiment. A:independent. B:dependent. C:control

Semmy [17]

In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.

IamSugarBee

6 0

3 years ago

Zinc metal reacts with hydrochloric acid to produce zinc(II) chloride and hydrogen gas. How many liters of hydrogen gas will be

AleksAgata [21]

Answer:

0.120 L of hydrogen gas will be produced

Explanation:

Step 1: Data given

Mass of zinc = 10.0 grams

Volume of hydrochloric acid = 23.8 mL

Molarity of hydrochloric acid = 0.45 M

Molar mass of zinc =65.38 g/mol

Step 2: The balanced equation

Zn + 2HCl → ZnCl2 + H2

Step 3: Calculate moles Zinc

Moles Zn = mass Zn / molar mass Zn

Moles Zn = 10.0 grams / 65.38 g/mol

Moles Zn = 0.153 moles

Step 4: Calculate moles HCl

Moles HCl = molarity * volume

Moles HCl = 0.45 M * 0.0238 L

Moles HCl = 0.01071 moles

Step 5: Calculate limiting reactant

For 1 mol Zn, we need 2 moles HCl to produce 1 mol ZnCl2 and 1 mol H2

HCl is the limiting reactant. It will completely be consumed (0.01071 moles)

Zn is in excess. There will react 0.01071/2 = 0.005355 moles

There will remain 0.153 - 0.005355 = 0.147645 moles

Step 6: Calculate moles H2

For 1 mol Zn, we need 2 moles HCl to produce 1 mol ZnCl2 and 1 mol H2

For 0.01071 moles HCl we'll have 0.005355 moles H2

Step 7: Calculate volume H2

1 mol at STP = 22.4 L

0.005355 moles = 22.4 * 0.005355 = 0.120 L = 120 mL

0.120 L of hydrogen gas will be produced

4 0

4 years ago

What are the 4 parts of cell theory???? List like <br> 1.<br> 2.<br> 3.<br> 4.

pishuonlain [190]

Answer:

1. Cells contain DNA that is passed cell to cell during cell divison.

2. Cells are similiar in chemical composition and reactions that maintin homeostasis.

3. All basic chemical and physiological functions are carried out inside the cell.

4. Cell activity depends on the oragnelles withen the cell.

Hope this helps!

5 0

4 years ago

1. What is the mass of 2.23 x 1023 atoms of sulfur?

sertanlavr [38]

Answer:

La masa de 2,23×10²³ átomos de azufre es 11,85 g

A partir de una comprensión detallada de la hipótesis de Avogadro, entendimos que 1 mol de cualquier sustancia contiene 6,02 × 10²³ átomos.

La afirmación anterior implica que:

6,02×10²³ átomos = 1 mol de azufre

Recordar :

1 mol de azufre = 32 g

Así, podemos decir que:

6,02×10²³ átomos = 32 g de azufre

Con la información anterior , podemos obtener la masa de 2,23×10²³ átomos de azufre. Esto se puede obtener de la siguiente manera:

6,02×10²³ átomos = 32 g de azufre

Por lo tanto,

2,23×10²³ átomos = *la imagen*

2,23×10²³ átomos = 11,85 g de azufre

Así, la masa de 2,23×10²³ átomos de azufre es 11,85 g

Explanation:

The mass of 2.23×10²³ sulfur atoms is 11.85 g

From a detailed understanding of Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02 × 10²³ atoms.

The above statement implies that:

6.02×10²³ atoms = 1 mole of sulfur

Remember :

1 mole of sulfur = 32 g

Thus, we can say that:

6.02×10²³ atoms = 32 g of sulfur

With the above information, we can obtain the mass of 2.23×10²³ sulfur atoms. This can be obtained as follows:

6.02×10²³ atoms = 32 g of sulfur

Therefore,

2.23×10²³ atoms =*the picture*

2.23×10²³ atoms = 11.85 g of sulfur

Thus, the mass of 2.23×10²³ sulfur atoms is 11.85 g

5 0

2 years ago