Answer:
the answer is i think it's b
Explanation:
How many moles are in 24.3g of iron (II) oxide?
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Which of the following statements is true about acids?
A. Acids taste sour.
B. Acids conduct electricity when dissolved in water.
C. Acids turn blue litmus paper red.
D. Acids donate protons or H+ ions.
E. All of the Above
Answer:
It's (D)
Explanation:
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmus
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.Silicic acid is tasteless, is not soluble in water, does not conduct electricity, does not turn blue
Most acids taste sour, conduct electricity when dissolved in water, turn blue litmuspaper red, but not all of them. Some acids taste bitter, others sweet and some simply delicious.Silicic acid is tasteless, is not soluble in water, does not conduct electricity, does not turn bluelithmus paper red, since it merely does not dissociate in water. The only correct option is D
1. Does warm air rise or sink? Does cold air rise or sink?
2. Air pressure can be high or low. Does air flow from low to high pressure or from high to low pressure?
3. Which is heavier—warm air or cold air?
4. Which has higher air pressure—warm air or cold air? How do you know?
5. Global circulation cells occur because of uneven heat distribution and the earth's rotation. What do we call the effect of the earth's rotation on air circulation?
Answer:
1. Hot air rises and cold air descends for exactly the same reason
Matter are anything that is made up of atoms. The quantity of matter can be seen only on the basis of mass and volume calculation. Therefore, warm air rise and cold air sink.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science.
Matter is anything that is made up of atoms. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter.
Warm air rises while cold air descends. This is because hotter air takes more energy than cooler air. Furthermore, hot and cold temperatures are precisely proportionate to their density. As a result, when it's really hot, the hotter air is more likely to rise than when it's very cold.
Therefore, warm air rise and cold air sink.
To learn more about matter, here:
https://brainly.com/question/4562319
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Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid?
A) Both elements in the compound are metals.
B) The atomic masses of the elements in the compound are relatively small.
C) There is equal sharing of electrons between the atoms of the elements in the compound.
D) The electronegativity difference between the elements in the compound is relatively large.
Answer:
There is ionic bonding between Mg2+ ions and NO3− ions. Which of the following claims about a binary compound in which the bonding is ionic is most likely to be scientifically valid? Both elements in the compound are metals.
Answer:
The answer is D.
Explanation:
A: not correct: one element is a metal and the other is a non-metal.
B: not correct: Fr could be combined with Cl
C: not correct: They are transferred not shared.
D: correct: Non-metals have a higher electronegativity in comparison to the metals with a low electronegativity which results in a great change in electronegativity.
Explain why is it a good idea for the eco-house to have both a wind turbine and solar panels?
Answer:
Explanation:
Wind is more of an efficient power source than solar. Compared to solar panels, wind turbines release less CO2 to the atmosphere, consume less energy, and produce more energy.
Fullerenes (like the one shown) are made up of hexagonal rings of carbon atoms (like in graphite or graphene) and alternating pentagonal and heptagonal carbon rings to allow curvature of the surface producing molecules that have a complete hollow shape.
The extremely small diameter of the nanoparticle fullerenes (which act like a cage) allows them to readily pass through cell membranes and be readily absorbed into the body.
What potential benefit does this have in the pharmaceutical industry as well as medicine?
A)
The very small fullerene molecules would keep cancer cells from invading other healthy cells. As a result, it would keep cancer from spreading.
B)
The very small fullerene molecules could allow surgeons to see the insides of cells with tiny cameras as they perform complex surgery.
C)
The very small fullerene molecules could obstruct hazardous chemicals from getting into absorbed into cells.
D)
The very small fullerene molecules could easily deliver drugs directly into cells in a highly controlled manner.
Answer:
Your answer choice is D
Explanation:
I just got it right on USATestprep :))
PLS HELP NO LINKS PLS
What percentage of stars do Kepler scientists suggest host Earth size planets?
10.2%
2.6%
5.4%
15.9%
so the other guy can have branliest have a wonderful summer guys! :)
PLS help its not that hard but I don't understand it. Its science not chemistry but they don't have science.
In this activity, you will construct two solar ovens and use thermometers to determine which oven gets the hottest. What engineering problem are you trying to solve?
Answer:
Conservation of resources. Saving energy and helping reduce carbon emission.
Explanation:
How does the energy in chemical bonds affect the energy in a chemical reaction?
Answer:
Is by comparing the energy absorbed when bonds in the reactants are broken with the energy released when bonds in the products are formed, you can determine whether a chemical reaction releases energy or absorbs energy overall. Chemical reactions that release energy are called exothermic
Chemistry help!
Zoom in to see better!!
Answer:
2.5 moles of Al
Explanation:
We'll begin by calculating the number of mole in 127 g of Al₂O₃. This can be obtained as follow:
Mass of Al₂O₃ = 127 g
Molar mass of Al₂O₃ = 101.961 g/mol
Mole of Al₂O₃ =?
Mole = mass / molar mass
Mole of Al₂O₃ = 127 / 101.961
Mole of Al₂O₃ = 1.25 mole
Finally, we shall determine the number of mole of Al that reacted. This can be obtained as follow:
4Al + 3O₂ —> 2Al₂O₃
From the balanced equation above,
4 moles of Al reacted to produce 2 moles of Al₂O₃.
Therefore, Xmol of Al will react to produce 1.25 moles of Al₂O₃ i.e
Xmol of Al = (1.25 × 4)/2
Xmol of Al = 2.5 moles.
Thus, 2.5 moles of Al is needed for the reaction.
Un elemento tiene 3 orbítales desapareados y presenta 3 niveles de
energía. ¿A qué grupo y período peretenece?
a) IIIA, 3 b) IIIB, 3 c) VIA, 3 d) VB, 3 e) VA, 3
FIRST GETS BRAINLIEST (THE ONE THAT IS CORRECT)
A generator changes (Mechanical, Electrical, Static) energy into
(Mechanical, Electrical, Magnetic) energy.
Answer:
mechanical energy to electrical energy
Explanation:
The water turns the turbine with produces mechanical energy so the generator converts it to electrical energy
balance this equation:
AsCl3(aq) +__H2S (aq)--> __As2S3(s) + ___HCl (aq)
Is this equation right?
Answer:
no
Explanation:
because the characters are invalid
Answer:
no
Explanation:
because they are not valid
Please and thank you in advance. Due today
Answer:
Sorry I really don't know but can you help with one of my question I posted please thanks.
What type of reaction occurs without the addition of heat?
Answer:
A
Explanation:
A spontaneous reaction doesn't require any addition of heat.
The rest of the choices require a transfer of heat energy.
What do polar bonds share with electrons?
Answer:
Polar Covalent Bonds. A polar covalent bond exists when atoms with different electronegativities share electrons in a covalent bond. Consider the hydrogen chloride (HCl) molecule. Each atom in HCl requires one more electron to form an inert gas electron configuration.
Explanation:
A hydrate of copper (II) chloride, CuCl2∙nH2O, is heated until the mass of the anhydrate remains constant at 19.72 g, indicating a loss of 5.32 g of water. How many moles of water are present for each mole of salt in the original hydrate? (Find n.)
Answer:
n = 2
Explanation:
To solve this question we must find the moles of the anhydrate CuCl2 (Obtained from the mass of 19.72g) and the moles of water (Obtained from the 5.32g):
Moles CuCl2 -Molar mass: 134.45g/mol-
19.72g * (1mol / 134.45g) = 0.14667 moles
Moles H2O -Molar mass 18.01g/mol-
5.32g * (1mol / 18.01g) = 0.2954 moles
The ratio of moles of H2O:CuCl2 is:
0.2954 moles / 0.14667moles = 2.0
That means n = 2 and the formula is:
CuCl2∙2H2O
Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans ____.
A.increases
B.doubles
C.remains balanced
D. decreases
Answer: Because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
Explanation:
When evaporation takes place in sea water then of course there will occur an increase in salinity.
But as this evaporated water is replaced by water coming from rivers. As a result, the raising salinity is counter balanced by the water coming from rivers.
Hence, salinity remains balanced in sea water.
Thus, we can conclude that because fresh water is constantly be evaporated from the ocean and then replaced by rivers, the salinity of the oceans remains balanced.
44.0L of O2 react with excess Sulfur dioxide gas. All gases are kept at the same temperature, pressure, and volume. What will be the theoretical yield of Sulfur trioxide gas in Liters?
Answer:
The theoretical yield of sulfur trioxide is 88.0 Litres
Explanation:
The chemical reaction occurring between oxygen and sulfur dioxide is given in the chemical equation below :
2SO₂ + O₂ ----> 2SO₃
From the equation of reaction, 2 moles of sulfur dioxide reacts with 1 mole of oxygen to produce 2 moles of sulfur trioxide.
Volume of 1 mole of a gas at STP is 22.4 L
Number of moles of gas in 44.0 L = 44.0/22.4 moles
1 mole of oxygen reacts with 2 moles sulfur dioxide to produce 2 moles of sulfur trioxide;
44/22.4 moles of oxygen will react with excess sulfur dioxide to produce 2 × 44/22.4 moles of sulfur trioxide = 88/22.4 moles of sulfur trioxide
88/22.4 moles of sulfur trioxide will have a volume of 88/22.4 × 22.4 Litres = 88.0 Litres
Therefore, the theoretical yield of sulfur trioxide is 88.0 Litres
Find the pH of a solution with a [H+] of 0.045M.
Answer:
1.35Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log ([ {H}^{+} ])[/tex]
From the question
[H+] = 0.045 M
We have
[tex]pH = - log(0.045) \\ = 1.346787...[/tex]
We have the final answer as
1.35Hope this helps you
Answer:
1.35
Explanation:
Work out the relative formula mass of ammonium nitrate, NH4NO3.
Relative atomic masses: H 1; N 14; O 16.
...........................................................................................................................
...........................................................................................................................
Relative formula mass of ammonium nitrate = ...............................
Answer:
The relative molecular mass of ammonium nitrate is 80 gm
Explanation:
[tex]M_{NH4NO3}[/tex] = 14 + (4 × 1) + 14 + (16 × 3) = 80 (gm)
why are cells called the smallest functional unit of a living organism?
What do faults mean? I can see if people write it on goo gle btw.anddddddf short answers only please
Answer:
faults are wrong or disallowed options or suggestions.
At 15 mph, how long does it take to travel 15 miles?
Answer:
1 hour
Explanation:
Travelling at 15 miles per hour will get take 1 hour to travel 15 miles.
Based on the electron configuration of the two atoms, predict the ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the compound. sodium and bromine
Answer:
A. 1:1
Explanation:
The ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound is 1:1 because sodium needs to lose one electron and bromine needs one electron to become stable and complete its outermost shell. When sodium lose electron, it become cation and gain +1 charge while on the other hand, the bromine accept one electron and become anion and gain -1 charge so that's why we can say that there is 1:1 of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound.
How much heat is required to raise the temperature of a sample of copper from 0.0°C to 55.0°C, if its specific heat is 0.384 J/g°C and its mass is 10.00 g? Group of answer choices 351.4 2110 211.2 3.54
Answer:
211.2 J
Explanation:
Applying
Q = cm(t₁-t₂)............... Equation 1
Where Q = Amount of heat, c = specific heat capacity of copper, m = mass of copper, t₁ = initial temperature, t₂ = final temperature.
From the question,
Given: c = 0.384 J/g°C, m = 10 g, t₁ = 0°C, t₂ = 55°C
Substitute these value into equation 1
Q = 0.384×10×(55-0)
Q = 0.384×10×55
Q = 211.2 J
Which types of wave are used to support the theory that galaxies are expanding
Visible Spectrum
Explanation:
which uses red shift to indicate objects making away while the blue shift indicates objects moving down.
(1) We are sorry to say that we will not be able to publish your short story "Max versus the Robots in the school literary magazine. (2) Our editorial board enjoyed the story's creative setting and interesting characters. (3) However, the board ultimately decided that the plot was too confusing, and several members found the ending to be implausible. (4) In addition, some readers were concerned that the technical details about robots were totally boring. (5) Although we have to reject this story, we hope to publish your work in the future, so please submit a story to us again. Which option best revises this paragraph to maintain a formal tone throughout? (T) A. Replace sentence 4 with: In addition, some readers were concerned that the technical details about robots would not be of interest to most students. B. Replace sentence 2 with: The creative setting was enjoyed by the board, and the interesting characters were appreciated bynbe board as well! c. Replace sentence 5 with: While it is with great regret that we must rebuff your literary endeavor, we would like to disseminate a future opus penned by you If you would be so kind as to dispatch an additional work to us for our consideration. 0 D. Replace sentence 3 with: But the editorial board ultimately decided that the plot was too confusing, and several members had no clue what the deal was with the ending,
B.
Replace sentence 4 with: In addition, some readers were concerned that the technical details about robots would not be of interest to most students.
Explanation:
i just did the test
Answer:
It's B.
Explanation:
This gardener started with much smaller plants in this park. Over time, the garden has grown into a large display of brilliant flowers. What would you tell the gardener to explain how the plants have grown and flourished so successfully?