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marusya05 [52]
3 years ago
10

1) Which term describes the conversion of substances into different substances?(1 point)

Chemistry
1 answer:
lara [203]3 years ago
8 0

A chemical reaction occurs when substances change. Photosynthesis is the process by which plants produce food.

1) A chemical reaction is a process by which substances can be changed into other substances. Hence, in a chemical reaction, new substances are formed.

2) Photosynthesis is the process by which plants produce food using carbon dioxide and water in the process of sunlight and chlorophyll. Glucose is produced during photosynthesis and the energy produced and stored as starch.

3) Valence electrons show the kind of bond that an atom can form. Reaction between two atoms that have many valence electrons is most likely covalent. An ionic bond is formed between an atom that has few valence electrons and an atom that has many valence electrons.

4) A carbohydrate is a compound that comprises of hydrogen and oxygen in a ratio of 2:1. The compound that is a carbohydrate is C3H6O3.

5) Rocks contain iron. Iron oxides form when cyanobacteria produce oxygen via photosynthesis.

Learn more: brainly.com/question/1527403

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You arrive at science class in 45.0 seconds after running 90 m from math what is your speed
Yuliya22 [10]

Answer:

1/2 a second per meter

Explanation:

Hope this helps!

5 0
3 years ago
If you have an atom with 8 protons, 9 neutrons and 10 electrons, what is its mass number?
djverab [1.8K]
17 is the atomic mass
6 0
4 years ago
How does this equation help you to understand acids and bases: H+(aq) + OH-(aq)
KATRIN_1 [288]

Answer:

C. It shows you that the formation of water is a reversible reaction, which contains hydrogen and hydroxide ions.

Explanation:

The equation is

H₂O(ℓ) ⇌ H⁺(aq) + OH⁻(aq)

It also shows that water can behave as either an acid or a base, because it can produce both H⁺ and OH⁻ ions.

A and B are both wrong. Although the statements are correct, they don't say anything about acids and bases.

8 0
4 years ago
Match the following items. Match the items in the left column to the items in the right column. 1. general or nonspecific observ
ivann1987 [24]
when column B is like the attached pic: (missing in your question)

so the matches will be like that:

1- Qualitative :

as Qualitative is a general or nonspecific observation, they also don't require

measurements and even can't be measured, that is because of the reality is

being approximated only. It  describes qualities and uses opinion

2- Hypothesis : 

as a hypothesis is an educated guess quantitative, and it is a prediction stated

in " If and then " form. a hypothesis to be valid need a research such as:

-Encyclopedia & state and local research facilities & scientific journals.

3- Direct relationship:

as a Direct relationship is when two variable change in the same direction,

and one remaining larger than the other by the same factory.  

- this is a type of a relationship in which there is a change with one variable, and corresponding with the change in the other. and because this corresponding change with the other variable in the same direction so it refers to a positive relationship. 

4- Quantitative:

as Quantitative is a measured observation, It's an information or data based

on quantities obtained. And using numbers, equipment and standard units.

5- Control :

as control is standard, reference data or experiment qualitatively. this is what

you compare your experimental results to. This is for comparing results, it

used as a standard for comparison and use baseline measurements to use in

the comparing.

6- Theory :

 as Theory is a presently accepted explanation of how something happened.

 Scientifically acceptable general principles to explain phenomena. It the

general or abstract principles of the science. for example the  wave theory of

light.

7- Law :

as a law is a statement that explains what something does under the same

conditions. when we take about law in science, it is a general rule to explain

the observations in the form of a mathematical statement. Scientific law may 

be stated in words or expressed as a mathematical equations.

8- Best fit curve:

as best fit curve is a curve drawn to average the data's deviations direct

relationship. It is a process of constructing a curve that has best fit to a

series of data points. 

7 0
4 years ago
A galvanic (voltaic) cell consists of an electrode composed of titanium in a 1.0 M titanium(II) ion solution and a second electr
Readme [11.4K]

Answer: The standard potential for this cell is +1.49 V at 25C.

Explanation:

E^0_{[Sn^{2+}/Sn]}=-0.14V

E^0_{[Ti^{2+}/Ti]}=-1.63V

As titanium has lower reduction potential, it will act as anode and tin will acts as cathode.

Ti+Sn^{2+}\rightarrow Ti^{2+}+Sn

Using Nernst equation :

E_{cell}=E^o_{cell}-\frac{2.303RT}{nF}\log \frac{[Ti^{2+}]}{[Sn^{2+}]}

where,

F = Faraday constant = 96500 C

R = gas constant = 8.314 J/mol.K

T = room temperature = 25^oC=273+25=298K

n = number of electrons in oxidation-reduction reaction = 2

E^0=E^0_{cathode}- E^0_{anode}=-0.14-(-1.63)=1.49V

Where both E^0 are standard reduction potentials.

E^o_{cell} = standard electrode potential of the cell = 1.49 V

E_{cell} = emf of the cell = ?

Now put all the given values in the above equation, we get:

E_{cell}=1.49-\frac{2.303\times (8.314)\times (298)}{1\times 96500}\log \frac{1}{1}

E_{cell}=1.49V

6 0
4 years ago
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