Answer:obtain and use resources, grow, reproduce, and maintain stable internal conditions while living in a constantly changing external environment.
Explanation:
All successful organisms must be able to do the three things including obtain energy, produce offspring, maintain their structure. The correct option is B.
What is an organism?In biology, an organism is any natural, living system that functions as a separate entity. Cells make up all organisms.
Taxonomy divides organisms into groups such as multicellular animals, plants, and fungi, or unicellular microorganisms such as protists, bacteria, and archaea.
The current classification system is based on the Linnean system and has eight levels of taxa: domain, kingdom, phylum, class, order, family, genus, and species.
All successful organisms must be able to do three things: obtain energy, generate progeny, and maintain their respective structure.
Thus, the correct option is B.
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What are the products of the acid-base reaction of sodium carbonate with acetic acid?
Answer:
The mixture quickly foams up with carbon dioxide gas. If enough vinegar is used, all of the baking soda can be made to react and disappear into the vinegar solution. The reaction is: Sodium bicarbonate and acetic acid reacts to carbon dioxide, water and sodium acetate.
Explanation:
hope this helps
Why does solid water (ice) float when placed in liquid water? *
Ice does not float in liquid water.
Ice is less dense than liquid water.
Ice is more dense than liquid water.
The densities of liquid water and ice are the same .
Answer:
Ice is less dense than water.
Which element easily gains one electron to form a negative ion?
Flourine
Magnesium
Nitrogen
Lithium
Answer: Fluorine
Explanation: Fluorine has an oxidation state of -1, meaning it gains 1 electron in chemical bonds, forming a negative ion. Magnesium has an oxidation state of +2, nitrogen has -3, and lithium has an oxidation state of +1.
Answer:
Fluorine.
Explanation:
I took this test not to long ago. I got this question correct. Also, the reason is because every other element is balanced.
What is the mass number for an atom of zinc containing 30 protons and 34 neutrons?
Answer:
64
Explanation:
mass number =proton + neutron
=30+34=64
Which describes a difference between cephalopods and gastropods?
Cephalopods have a water vascular system, and gastropods have an open circulatory system.
Cephalopods live only in ocean environments, and gastropods live in a variety of environments.
Cephalopods have a simple nervous system, and gastropods have a complex nervous system.
Cephalopods are the largest group of mollusks, and gastropods are the smallest group of mollusks. CAN SOMEONE PLZZZZ ANWER THIS I WILL GIVE U 15 PIONTS
Answer:
B
Explanation:
I took the test
Answer:
The correct answer is B
Explanation:
When NH3(aq) is added to Cu2 (aq), a precipitate initially forms. Its formula is:
a. Cu(NH)3
b. Cu(NO3)2
c. Cu(OH)2
d. Cu(NH3)22
e. CuO
When NH₃(aq) is added to Cu₂(aq), a precipitate initially forms. Its formula is Cu(NH₃)². The correct option is d.
What is a chemical formula?A chemical formula is a representation of chemical elements and chemical compounds. The chemical letters are used to write the chemical formula. The charges if present is written by charges symbols like plus, minus.
The chemical reaction is
NH₃(aq) + Cu₂(aq) = Cu(NH₃)²
This is called a chemical reaction, which contains reactant on the left side and products on the right side. The precipitate that is formed is copper ammonia whole twice.
Precipitation is the solid crystals' substance that is come out at the surface of the liquid. It is collected in solid form, and it is called a precipitate.
Thus, the correct option is d. Cu(NH₃)².
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What is the source of thermal energy for Earth's mantle?
A Earth's core
B. global warming
C. mantle downwelling
D. radiation from the sun
Answer:
D. Radiation from the sun
Explanation:
The main source of thermal energy for the earth is Sun. The sun is major source which provide heat energy and light energy to the earth. The sun converts almost 4 million tons of energy into electromagnetic radiations which is a source of thermal energy for Earth's Mantle.
Which is an example of a solution?
Answer: Examples:: Rubbing Alcohol, Dissolved Sugar in Water
Explanation:
A solution is a homogeneous mixture made up of two or more substances.
Question 3 (1 point)
Consider the following unbalanced chemical equation representing the combustion of methane, yielding carbon dioxide and water.
CH4 + O2 --> CO2 + H20
If you had burned 800 g of methane, how many moles of Carbon dioxide would be produced?
A)122.22
B)8
C)2200
D)100
E)670
F)750
G)50
Answer:
Im pretty sure its B
Explanation:
Answer:
G) 50 mol
Explanation:
Given data:
Mass of methane = 800 g
Number of moles of CO₂ produced = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of methane:
Number of moles = mass/molar mass
Number of moles = 800 g/ 16 g/mol
Number of moles = 50 mol
Now we will compare the moles of methane and carbon dioxide.
CH₄ : CO₂
1 : 1
50 : 50
A chemist adds of a M calcium sulfate solution to a reaction flask. Calculate the mass in grams of calcium sulfate the chemist has added to the flask
Answer:
1.23 g
Explanation:
A chemist adds 1.55 L of a 0.00582 M calcium sulfate solution to a reaction flask. Calculate the mass in grams of calcium sulfate the chemist has added to the flask.
Step 1: Given data
Volume of the solution (V): 1.55 LMolar concentration of the solution (C): 0.00582 M (0.00582 mol/L)Step 2: Calculate the moles (n) of calcium sulfate added
We will use the following expression.
n = C × V
n = 0.00582 mol/L × 1.55 L
n = 0.00902 mol
Step 3: Calculate the mass corresponding to 0.00902 moles of calcium sulfate
The molar mass of calcium sulfate is 136.14 g/mol.
0.00902 mol × 136.14 g/mol = 1.23 g
A chemist dissolves of pure potassium hydroxide in enough water to make up of solution. Calculate the pH of the solution. (The temperature of the solution is .) Be sure your answer has the correct number of significant digits.
Answer:
12.99
Explanation:
A chemist dissolves 716. mg of pure potassium hydroxide in enough water to make up 130. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Be sure your answer has the correct number of significant digits.
Step 1: Given data
Mass of KOH: 716. mg (0.716 g)Volume of the solution: 130. mL (0.130 L)Step 2: Calculate the moles corresponding to 0.716 g of KOH
The molar mass of KOH is 56.11 g/mol.
0.716 g × 1 mol/56.11 g = 0.0128 mol
Step 3: Calculate the molar concentration of KOH
[KOH] = 0.0128 mol/0.130 L = 0.0985 M
Step 4: Write the ionization reaction of KOH
KOH(aq) ⇒ K⁺(aq) + OH⁻(aq)
The molar ratio of KOH to OH⁻is 1:1. Then, [OH⁻] = 0.0985 M
Step 5: Calculate the pOH
We will use the following expression.
pOH = -log [OH⁻] = -log 0.0985 = 1.01
Step 6: Calculate the pH
We will use the following expression.
pH + pOH = 14
pH = 14 - pOH = 14 -1.01 = 12.99
What are 4 ways you can improve your skeletal system health?
Answer:
1. get vitamin c
2. get your bone mineral density tested
3. don't smoke or drink excessively
4. start weight-bearing exercise
Explanation:
helps improve skeletal system
Can you click the picture
Answer:
B.
Explanation:
Answer:
no but it might just be my computer acting up again
Explanation:
What would happen if a plant was unable to receive pollen? A.the plant would continue to produce fruits and seeds. B.the plant would be unable to produce fruits and seeds.
C.Instead of the pistil producing pollen, the ovule would produce it.
D.Instead of the stamen producing pollen, the stigma would produce it.
Answer:
I think its B only because nothing else makes sense
Explanation:
but you should take your best guess
To solve this we must be knowing each and every concept related to plant. Therefore, if a plant was unable to receive pollen then the plant would be unable to produce fruits and seeds. The correct option is option B.
What is plant?Plants are mostly photosynthetic eukaryotes in the Plantae kingdom. Traditionally, the plant kingdom comprised all non-animal living creatures, including algae and fungi; but, all current definitions include Plantae exclude fungi and certain algae, as well as prokaryotes.
According to one definition, plants belong to the group Viridiplantae (Latin for "green plants"), which is sister to the Glaucophyta and includes green algae as well as Embryophyta (land plants). If a plant was unable to receive pollen then the plant would be unable to produce fruits and seeds.
Therefore, if a plant was unable to receive pollen then the plant would be unable to produce fruits and seeds. The correct option is option B.
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A mixture of 620 lbmol/h of 36 mol% benzene and the remainder toluene is separated continuously into two products. One product is 98 mol% benzene and the other is 95 mol% toluene. Calculate the flow rates of both products in kmol/h.
Answer:
[tex]P_1=206.7lbmol/h\\\\P_2=413.3lbmol/h[/tex]
Explanation:
Hello!
In this case, for the separation of the benzene-toluene mixture, we can use the following mole balances including the given mole fraction at each stream per species:
[tex]B:0.36*620=0.98P_1+0.05P_2\\\\T:0.64*620=0.02P_1+0.95P_2[/tex]
That can be solved by using a solver for P1 (benzene-rich flow) and P2 (toluene-rich flow):
[tex]P_1=206.7lbmol/h\\\\P_2=413.3lbmol/h[/tex]
Best regards!
How are hail and snow different? (Check the picture for answer options)
Answer:
A, Hail is large spheres of ice and snow is small flakes of ice.
A scientist observes several different fossils in a
rock layer. Based on this observation, which is
the best conclusion?
A. The fossils are composed of lava that cooled
around several organisms.
B. The fossils formed about the same time as the
rock layer in which they were found.
C. The fossils formed after heat and pressure
changed the type of rock in the rock layer.
D. The fossils are composed of the same material
as the organisms from which they formed.
A scientist observes several different fossils in a
rock layer. Based on this observation, which is
the best conclusion?
Answer:A. The fossils are composed of lava that cooled
A. The fossils are composed of lava that cooledaround several organisms.
B. The fossils formed about the same time as the rock layer in which they were found.
Explanation:That's the right answer but you can choose one.
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