Answer:
D. the amount of oxygen collected over a period of 12 hours
Explanation:
Photosynthesis is a metabolic reaction performed by the cells of plant. In this reaction, light is used as an energy source to combine carbon dioxide (CO2) and water (H2O) to produce glucose and oxygen gas (O2) as products. In every chemical reaction including photosynthesis, an increase in concentration of reactants will increase the rate of the reaction, which is evident in the amount of products formed.
According to this question where a student is performing an investigation to determine the relationship between a higher than normal concentration of carbon dioxide gas and the rate of photosynthesis. After increasing the concentration of carbon dioxide in water, the student illuminated the plant with a light and collected the bubbles of oxygen gas that were given off from the cut end of the submerged plant.
Based on the above explanation, the best indicator of the rate of photosynthesis in this investigation will be THE AMOUNT OF OXYGEN COLLECTED OVER A PERIOD OF 12 HOURS.
The pic is the question! Please help
Part 1
Observe the image of sodium. List the properties you see.
Part 2
Observe the image of hydrogen chloride. List the properties you see.
Answer:
Observable properties of sodium from the image:
1. It's slivery-white solid
2. It's shiny and bright
3. Looks soft
4. Looks waxy
Observable properties of hydrogen chloride from the image:
1. It is a colorless liquid
2. It is transparent
Explanation:
Sodium is known to be a metal that is silvery-white and waxy in appearance. The metal is bright and shiny especially when it is cut. It can be cut with a knife due to it soft nature. It is reactive and has low melting point. It actually reacts with water to form sodium hydroxide.
Hydrogen chloride (known to be hydrochloric acid) is a transparent and colorless substance. It is used in manufacturing plastics, textile, fertilizers, etc. The concentrated hydrogen chloride is very corrosive.
The above are what I can see from the image.
I need done within 2 hours. Thanks alot.
Answer:
Independent Variable:The size of the ice cube Dependent:The temperatureof the water controlled:the amount of water
Place a thermometer in the water, put the ice cube in then when it melts =see the ending temperature
Explanation:
An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2.0 mL. The height of the water rose to 7.0 mL. If the mass of the stone was 25 g, what was its density?
Answer:
Density = 5 g/mL
Explanation:
Given data:
Volume of water = 2.0 mL
Volume of water + stone = 7.0 mL
Mass of stone = 25 g
Density of stone = ?
Solution:
Volume of stone = (volume of water + stone) - volume of water
Volume of stone = 7.0 mL - 2.0 mL
Volume of stone = 5.0 mL
Density of stone = mass/ volume
Density = 25 g/ 5.0 mL
Density = 5 g/mL
A potted plant is placed under a grow lamp, which provides 4,200 J of energy to the plant and the soil over the course of an hour. The specific heat capacity of the soil is about 0.84 J/g° C and there are about 2,400 g of soil. How much does the temperature of the soil increase?
Answer:
Temperature increase = ΔT = 2.08 °C
Explanation:
Given data:
Energy absorbed by plant = 4200 J
Specific heat capacity of soil = 0.84 J/g°C
Mass of soil = 2400 g
How much temperature increase = ?
Solution:
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
by putting values,
4200 J = 2400 g ×0.84 J/g°C × ΔT
4200 J = 2016 J/°C × ΔT
ΔT = 4200 J / 2016 J/°C
ΔT = 2.08 °C
What does the GOES acronym stand for?
A. Geological Open Engineering System
B. Geostationary Opertational Environmental Satellite
C. Grandma Only Eats Spagetti
Answer:
B. Geostationary Operational Environmental Satellite
Explanation:
Hope this helps!
Answer:
B
Explanation:
I’m studying it for you!
Mg(s) + HCl(aq) −→ MgCl2(aq) + H2(g).
What mass of HCl is consumed by the reaction of 2.28 mol of magnesium?
Answer in units of g
166 g HCl
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightChemistry
Stoichiometry
Reading a Periodic TableBalancing EquationsUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN - Unbalanced] Mg (s) + HCl (aq) → MgCl₂ (aq) + H₂ (g)
[RxN - Balanced] Mg (s) + 2HCl (aq) → MgCl₂ (aq) + H₂ (g)
[Given] 2.28 mol Mg (s)
Step 2: Identify Conversions
[RxN] 1 mol Mg = 2 mol HCl
Molar Mass of H - 1.01 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of HCl - 1.01 + 35.45 = 36.46 g/mol
Step 3: Stoichiometry
Set up: [tex]\displaystyle 2.28 \ mol \ Mg(\frac{2 \ mol \ HCl}{1 \ mol \ Mg})(\frac{36.46 \ g \ HCl}{1 \ mol \ HCl})[/tex]Multiply: [tex]\displaystyle 166.258 \ g \ HCl[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
166.258 g HCl ≈ 166 g HCl
What element of the compound caused the colors of the flames
Answer:
Flame colors are produced from the movement of the electrons in the metal ions present in the compounds. For example, a sodium ion in an unexcited state has the electron configuration [tex]1s^{2} 2s^{2} 2p^{6}[/tex].
Explanation:
Explain, in your own words, what volumic mass is
plss helpp
Answer:
I think that volumic mass is like weight of an object, or like the space it takes up??
Explanation:
Have A Wonderful Day !!
help me please with my science test questions 5 and 6
Answer:
5. Element J has the highest atomic number
6. Elements G and L have the same number of electrons in their outermost shell.
Explanation:
The periodic table of elements is a table which shows the arrangement of the elements in the order of increasing atomic number. Starting from the topmost left-hand side of the table where the element with the least atomic number is placed, and going across the table from left to right and down to the lowest point to the right of the table, where the element with the highest atomic number is located, the atomic number of elements progressively increases.
Looking at the table, it can be seen that the element J is found at the lowest point to the right of the table. Therefore, element J has the highest atomic atomic number.
6. In the periodic table, elements are arranged into groups and periods. The groups are the columns while the periods are the rows. Elements in the same column or group have the same number of electrons in their outermost shell. Therefore, element G and L have the same number of electrons in their outermost shell.
A ________ contains paired statements that can be used to identify organisms. Domains _________ and ________ are made up of Prokaryotes
Answer:
b thats just what i do
Explanation:
Explanation:
A. taxonomic/dichotomous key
B.Domains Bacteria and Archaea are made up of prokaryotic cells.
To be effective, a certain drug must not drop below 15 mg in the body. A 120
mgs of that drug was administered to a patient. How much time will it take for
that drug to reach the 15 mg minimum level. The drug's half-life is 30 minutes.
4.
Think and discuss: Why is there an attraction between the two ions in this chemical bond?
Answer:
These ions are attracted to each other due to its opposite charges. This force of attraction is called an ionic bond because it is formed by the attraction of two atoms with opposite charges.
Explanation:
LOL im answering this question for a gizmo assingment rn
There is an attraction between two ions in a bond because they are composed of opposite charges.
In science, we know that opposite charges attract while like charges repel according to the first law of electrostatics. Ionic bonds are composed of metal and non metal ions. The metal ions are positively charged while the nonmetal ions are negatively charged.
These oppositely charged ion pair constitute the ionic bond therefore, there an attraction between the two ions in this chemical bond because they are unlike charges.
Learn more: https://brainly.com/question/2673886
What happened when we made the predator(snake) population larger?
Sentence starter: The rabbit (prey) population...
Answer:
The rabbit prey population will decrease.
Explanation:
More predators are there to eat the prey
Help me (number 5).
Answer:
a. HF
Explanation:
Which element probably reacts most like bromine, Br?
A) Oxygen, O
B) Selenium, Se
C) Krypton, Kr
D) Chlorine, Cl
Answer:
D) Chlorine, Cl
Did Adam Jackson win by
Answer:
by a number
Explanation:
Answer:
Hm may you edit the question and put in the full question all it says is "Did Adam Jackson win by"
Explanation:
.
What is the product(s) of the reaction below?
2Al(s) + Fe2O3(s) ---> Al2O3(s) + 2Fe(s)
A. Solid aluminum oxide and solid iron
B. Solid aluminum
C. Saturated aluminum oxide and saturated iron
D. Iron(III) oxide and aluminum oxide
Answer:
A. Solid aluminum oxide and solid iron
Explanation:
The reaction equation is given as:
2Al + Fe₂O₃ → Al₂O₃ + 2Fe
The species on the left hand side are the reactants
Those on the right hand side of the expression are the products.
The products are:
Al₂O₃ and Fe
These are solid aluminum oxide and solid iron
A student claims that a large percentage of water on Earth is immediately available to drink. Is he correct? Why or why not?
Answer:
No, the student is not correct. The earth may have a lot of water... but not every part of water is drinkable. Most water is filled with bacteria and or viruses making it not suitable to drink! :)
Explanation:
HOPE THIS HELPS! BRAINLIEST? :)
1. 55 grams of salt are added to 100 L of water to make a saline solution.
What is the g/L concentration of the aqueous solution?
Show your work!
Answer:
0.55g/L
Explanation:
Given parameters;
Mass of salt = 55g
Volume of water = 100L
Unknown:
g/L concentration = ?
Solution:
To solve this problem, we must understand that concentration is the amount of solute per solution
g/L concentration = [tex]\frac{55}{100}[/tex] = 0.55g/L
Which of the above electron dot structures is wrong?
Be
B
Al
H
Ne
Answer:
Al
Explanation:
Aluminum (Al) is in the same group as Boron (B) so it should have three electrons or dots around it.
Hope that helps.
Answer:
Structre of Al is wrong
Means Al is right answer of the above question
Explanation:
Because valence shell of aluminum contains three electron not 5 elctrons
Correct structure of Al is given
The force applied to a pulley is called
Answer:
the effort
Explanation:
:)
NEED NOW!!
How does this picture represent the levels of
organization inside of plants and animals? Write atleast 2-3 sentences.
Answer:
⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣀⣀⣾⣿⣿⣿⣿
⣿⣿⣿⣿⣿⡏⠉⠛⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⣿
⣿⣿⣿⣿⣿⣿⠀⠀⠀⠈⠛⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠛⠉⠁⠀⣿
⣿⣿⣿⣿⣿⣿⣧⡀⠀⠀⠀⠀⠙⠿⠿⠿⠻⠿⠿⠟⠿⠛⠉⠀⠀⠀⠀⠀⣸⣿
⣿⣿⣿⣿⣿⣿⣿⣷⣄⠀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣴⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⣿⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⣴⣿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⡟⠀⠀⢰⣹⡆⠀⠀⠀⠀⠀⠀⣭⣷⠀⠀⠀⠸⣿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⠃⠀⠀⠈⠉⠀⠀⠤⠄⠀⠀⠀⠉⠁⠀⠀⠀⠀⢿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⢾⣿⣷⠀⠀⠀⠀⡠⠤⢄⠀⠀⠀⠠⣿⣿⣷⠀⢸⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⡀⠉⠀⠀⠀⠀⠀⢄⠀⢀⠀⠀⠀⠀⠉⠉⠁⠀⠀⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⠀⠀⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿
Explanation:
How many atoms of each element in the compound 2(PO4)
Answer:
8 & 13
Explanation:
Please help
If you know Spanish I’ll mark mark you as brainlister
section 5:
1. D
2.E
3.F
4.A
5. C
6. B
Answer:
5 Match each picture with a correct word or expression
1. el premio d.
2. la vuelta a Francia e.
3. los juegos Olímpicos f.
4. soy musculoso a.
5. hacemos ejercicio c.
6. metimos un gol b.
6 Translate the following sentences into spanish:
1. I like watching the olympic games
Me gusta ver los juegos Olímpicos
2. the pan American games are a very important competition
Los juegos Panamericanos son una competición muy importante
3. to stay fit it is good to follow a well balanced diet
Para mantenerse en forma es bueno seguir una dieta sana y equilibrada
4. to score a goal it is necessary to play on a team
Para marcar un gol es necesario jugar en equipo
5. The tour de France is the most famous cycling competition in the world
El Tour de Francia es la competición de ciclismo más famosa del mundo.
6. the world cup is the most popular sporting event in the world
La copa del mundo es el evento deportivo más popular del mundo
I highly recommend to read this carefully.
After what part of the cell cyle does the cell begin interphase?
A.anaphase
B.prophase
C.cytokinesis
Explanation:
The prefix inter- means between, reflecting that interphase takes place between one mitotic (M) phase and the next. Image of the cell cycle. Interphase is composed of the G1 phase (cell growth), followed by the S phase (DNA synthesis), followed by the G2 phase (cell growth).
how to calculate the mass of fraction of all elements in calcium carbonate
(CaCO3)
Answer:
I have made it in above figure hope it helps
What is Johann Dobereiner's contribution to the development of the periodic table?
I was too afraid we wouldn't be let in if l corrected the man's pronunciation, but I said our name to myself, opening my mouth wide for the organ blast of the a, trilling my tongue for the drumroll of the r, All-vah-rrr-es! How could anyone get Elbures out of that orchestra of sound?
Which influence does Alvarez write about in this passage?
her family
her neighbors
her family’s heritage
her personal experience
Answer:
D. Her Personal experience.
Can compounds be broken down into the elements they are made of?
Answer:
yes, some can
Explanation:
because like salt an other compounds by being decomposed