What are 3 characteristics of all invertebrates
Answer:
None have backbones
No cell walls
Multicellular
Includes radial or bilateral body symmetry.
Explanation:
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Consider this graph showing temperature over time. What would happen in the situation? The temperature decreases from 25° to 15°C, the material ____ heat and its kinetic energy ____ as the material, freezes to become a solid.
Answer:
One of the major effects of heat transfer is temperature change: heating increases the temperature while cooling decreases it. We assume that there is no phase change and that no work is done on or by the system. Experiments show that the transferred heat depends on three factors—the change in temperature, the mass of the system, and the substance and phase of the substance.
100 grams of calcium were dropped into 100 grams of water. How many grams of calcium hydroxide would be produced?
Answer:
100
Explanation:
Which metal will lose electrons more easily, Ca or Mg?
write an equation illustrating the condensation of p-diaminobenzene with the acid chloride of oxalic acid (cocl)2
Answer:
Explanation:
p-diaminobenzene is popularly known as p-phenylenediamine. It undergoes a condensation reaction with metal halides. As a white solid (p-diaminobenzene), it can be darkened by air oxidation. The reaction showing the condensation of p-phenylenediamine with (CoCl)₂ can be seen in the image attached below.
A chemist prepares a solution of barium acetate BaCH3CO22 by weighing out 52.9g of barium acetate into a 100.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /gL of the chemist's barium acetate solution. Round your answer to 3 significant digits.
Answer:
529g/L
Explanation:
The concentration in chemistry is defined as the amount of solute in a determined amount of solution. The concentration in g/L means the amount of grams of solute (In this case, barium acetate), per liter of solution.
To solve this problem we need to find grams of solute (52.9g, already given) and the volume in liters (Converting 100mL to liters):
Volume:
100mL * (1L / 1000mL) = 0.100L
And concentration in g/L is:
52.9g / 0.100L =
529g/LH3PO4 what’s the name?
Answer:
Phosphoric acid
Explanation:
Answer:
Phosphoric acid
Explanation:
Phosphoric acid is an oxyacid, which is formed when hydrogen combines with the polyatomic ion phosphate. The polyatomic ion for phosphate is [tex]PO_4^-3[/tex]. To combine this with hydrogen, we "criss-cross" the charges of phosphate (which has a charge of -3) and hydrogen (which has a charge of +1) to get [tex]H_3(PO_4)_1[/tex], the same as [tex]H_3PO_4[/tex].
To answer this question, we essentially reverse these steps. First, we would recognize that this is a hydrogen atom bonded with phosphate. Because phosphate is a polyatomic ion, we know that this is an oxyacid. Because it involves phosphate, we call it phosphoric acid.
I hope this helps!
Explain how the
total number of
atoms are
different from
the total number
of elements in a
compound
Explain how balancing
chemical equations with
coefficients conserve the
mass in a reaction.
Water in the atmosphere is a gas. When the air cools, water may condense into clouds. Then it may become a liquid or a solid and fall back to the surface of the Earth.
Water that falls from clouds is called
A.
precipitation.
B.
evaporation.
C.
groundwater.
D.
the water cycle.
Answer:
A precipitation is answer
Which of the following is the best example of a heat conductor?
A
a plastic cup
B
a wooden chair
C
a fabric potholder
D
a metal frying pan
Answer:
hope it helps you
Explanation:
i think is d
What should a student do to set a goal? Check all that apply.
Create a plan.
Make a schedule.
Schedule lots of tasks.
Rush into the goal.
Pace him or herself.
Answer:
create a plan
the ways of of a student to set a goal
1. Write clear and measurable goals
2.Create a specific plan for each goal
3.Read your goals daily and visualize yourself accomplishing them
4. Reflect yourself to see if you are on target
5. Revise your action plans if needed.
1.)make a plan
2.)make a schedule
5.)pace him or herself
1.7 x 10 cm= significant figures
Answer:
its 2
Explanation:
The name of the formula MnCl7
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Which of the following is NOT a part of a circuit? source pathway current load
Answer:
Pathway
Explanation:
Pathways and Circuits are different things, so it can't be part of it.
What would the final freezing point of water be if 3 mol of
sugar were added to 1 kg of water (Kx = 1.86°C/(mol/kg)
for water and i = 1 for sugar)?
A. -1.86°C
B. -5.58°C
C. -0.62°C
Ο Ο
D. +5.58°C
SUBMIT
Answer:
B. -5.58°C.
Explanation:
Hello!
In this case, since the freezing point depression is computed as follows:
[tex]\Delta T_f=-i*m*Kf[/tex]
Whereas i=1 as the van't Hoff's factor of sugar (nonionizing solute), m=3mol/1kg=3mol/kg as the molality and Kf=1.86 °C/(mol/kg) as the freezing point depression constant for water. In such a way, we plug in to obtain:
[tex]\Delta T_f=-1*3\frac{mol}{kg} *1.86\frac{\°C}{mol/kg} \\\\\Delta T_f=-5.58\°C[/tex]
Now, since the freezing point of pure water is 0°C, we infer that freezing point of such solution is:
B. -5.58°C.
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01:29:56
What must be true about two objects if heat is flowing between them?
The objects must be different temperatures.
The objects must be the same temperature.
The objects must both be over room temperature.
The objects must both be under room temperature.
Answer:
a
Explanation:
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Which list of elements contains a metal, a melalloid and a nonmetal
Answer:
group 15 ( the nitogen group)
Explanation:
Based on the concept of the global conveyor belt, what happens to ocean water as it moves from Antarctica to the equator?
a It transfers thermal energy to deeper layers of the ocean.
b It becomes less dense and rises to the surface.
c It transfers thermal energy to the area, warming the equatorial waters.
d It becomes more dense and sinks to the ocean bottom.
Answer:
c
Explanation:
The ocean water transfers thermal energy to the area, warming the equatorial waters. Therefore, the correct option is option C.
What is thermal energy?In physics and engineering, the phrase "thermal energy" is thrown around in a lot of different situations. It can relate to a variety of distinct physical notions. They include radiation and a body of matter's inherent energy, also known as enthalpy.
Through means besides just thermodynamic work or the movement of matter, including such conduction, radiation, or friction, heat is energy that is moved into or out of a thermodynamic system. Heat is not a property of any single system or something that is "contained" within it; rather, it is a quantity that is transmitted across systems. Internal energy and enthalpy, on the other hand, are characteristics of a single system. The ocean water transfers thermal energy to the area, warming the equatorial waters.
Therefore, the correct option is option C.
To know more about thermal energy, here:
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How does a magnet separate mixtures like sand and iron filings?
Answer:
because iron is magnetic and sand is not
Explanation:
what is the empirical formula of A compound is found to contain 39.12 % carbon, 8.772 % hydrogen, and 52.11 % oxygen by mass.
Answer:
C₃H₈O₃
Explanation:
Let's assume we have 100 g of said compound. Then we would have:
39.12 g of C8.772 g of H52.11 g of ONow we convert those masses into moles, using their respective atomic weights:
C ⇒ 39.12 g ÷ 12 g/mol = 3.26 mol CH ⇒ 8.722 g ÷ 1 g/mol = 8.722 mol HO ⇒ 52.11 g ÷ 16 g/mol = 3.26 mol OThen we divide those moles by the smallest number among them:
C ⇒ 3.26 mol C / 3.26 = 1H ⇒ 8.722 mol H / 3.26 = 2.68O ⇒ 3.26 mol O / 3.26 = 1Finally we multiply those numbers by 3, so as to convert the 2.68 of H into an integer:
C ⇒ 1 * 3 = 3H ⇒ 2.68 * 3 = 8O ⇒ 1 * 3 = 3Thus the empirical formula is C₃H₈O₃
Ti(SO4)2 chemical compound?
Answer:
Titanium(IV) Sulfide
Explanation:
Why was Niels Bohr’s atomic model superior to all the earlier models?
A.
It proved that the atom was indivisible and therefore the smallest unit of matter.
B.
It showed how the electron could orbit the nucleus without falling into it.
C.
It was the first to show that the atom had no net charge.
D.
It used wave behavior to explain the positions of electrons around the nucleus.
Answer:
B
Explanation:
The Niels Bohr's atomic model superior to all the earlier models is because it showed how the electron could orbit the nucleus without falling into it
Johnson, Taniya
A student travels on a trail by bicycle 20 miles in 2 hours. What is the average speed of the student?
Answer:
i think its 10 miles per hour
Why can you see solids and liquids, but not most gases?
Why can gases and liquids be paired but not solids?
The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.
Name the similarities between a animal cell and a plant cell
Answer:
Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.
Explanation:
I hope it's help
How do you know whether or not a chemical
reaction equation follows the law of
conservation of mass?
Answer:
- Because it has or not the same number of atoms at each side.
- Because the mass of reactants and product is or not the same after the reaction.
Explanation:
Hello!
In this case, since the law of conservation of mass states that matter cannot be created nor destroyed; when we see a chemical reaction, we need to make sure that the amount of atoms is the same at both reactants and products; for instance the formation of water requires four hydrogen atoms and two oxygen atoms at both reactants and products sides as shown below:
[tex]2H_2+O_2\rightarrow 2H_2O[/tex]
Another way is by proving that the total mass of products equals the total mass of reactants once the reaction has gone to completion.
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How many moles of Aluminum are produced when34.2 g of alumina are broken down through the process of electrolysis
Answer:
0.670 mol
Explanation:
Step 1: Write the balanced reaction for the decomposition of alumina
2 Al₂O₃ ⇒ 4 Al + 3 O₂
Step 2: Calculate the moles corresponding to 34.2 g of Al₂O₃
The molar mass of Al₂O₃ is 101.96 g/mol.
34.2 g × 1 mol/101.96 g = 0.335 mol
Step 3: Calculate the moles of Al produced from 0.335 moles of Al₂O₃
The molar ratio of Al₂O₃ to Al is 2:4.
0.335 mol Al₂O₃ × (4 mol Al/2 mol Al₂O₃) = 0.670 mol Al
Which group in the periodic table contains the three elements with the highest electrical conductivities?
A. Group 8
B. Group 12
C. Group 11
D. Group 7
Answer:
C Group 11
Explanation:
Group 11, by modern IUPAC numbering, is a group of chemical elements in the periodic table, consisting of copper (Cu), silver (Ag), and gold (Au).
These elements show highest electrical conductivity.
Answer:
C Group 11
Explanation:
Group 11, by modern IUPAC numbering, is a group of chemical elements in the periodic table, consisting of copper (Cu), silver (Ag), and gold (Au).
These elements show highest electrical conductivity.
Explanation:
what are connecting components
Answer:
In graph theory, a component of an undirected graph is an induced subgraph in which any two vertices are connected to each other by paths, and which is connected to no additional vertices in the rest of the graph.