The summer is caused by __________.

Which phrase best completes the sentence?


Earth's far distance from the sun


direct sunlight striking Earth


Earth's closeness to the sun


indirect sunlight striking Earth

Answer:

The answer is covalent bonding.

Explanation:

When both non-metals react, they will form Covalent bond .

When metals react with non-metal, they form Ionic bond .

When phosphorus (P) reacts with oxygen (O2), they form covalent bonds to create phosphorus pentoxide (P4O10), a chemical bond formed by the sharing of electron pairs between atoms.

When phosphorus (P) reacts with oxygen (O2), it forms a compound called phosphorus pentoxide (P4O10). The type of bond formed in this reaction is a covalent bond. A covalent bond is a chemical bond formed by the sharing of electron pairs between atoms. In this case, phosphorus and oxygen share electrons to achieve a stable electron configuration. Phosphorus needs 3 more electrons to complete its outer shell, while oxygen needs 2 more. So, they share electrons mutually to meet their requirements, forming covalent bonds.

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its B why because the reaction is good with B

The term solubility has to do with the ability of a solute to dissolve in a solvent.

The term solubility has to do with the ability of a solute to dissolve in a solvent. The solubility of a solute can be obtained by reading of the solubility curve.

The answers to the questions are;

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Answer:

kinetic energy

Explanation:

because of the movement of gravity and space

Answer:

17g

Explanation:

4NH3 (g) + 502 (g) –> 4NO (g) + 6H20 (g)

Mass of O2 mole = 32g

Therefore 5O2 = 160g

Mass of NH3 mole = 17g

Therefore 4NH3 = 17 x 4 =68g

Required amount of NH3 = 68 x 40/160 = 17g

Answer:

public health

Answer: Clean water is important to (public health). Diseases can spread through cities due to unclean water.

Explanation: I hope this helps!

Answer:

plastids

Explanation:

chloroplasts, chromoplast and leucoplasts, that all conduct photosynthesis

The change in electrons for manganese in the reaction is a gain of 5 electrons per atom, as it is reduced from +7 to +2 during the redox process, resulting in a total gain of 10 electrons for the two Mn atoms involved.

The change in electrons for manganese in the given reaction is a reduction process where manganese (Mn) changes from an oxidation state of +7 to +2. Manganese is initially part of the permanganate ion, MnO4-, with an oxidation state of +7 for manganese. In the reaction with hydrogen peroxide (H2O2), manganese is reduced to Mn2+ with an oxidation state of +2.

Considering the change in oxidation state from +7 to +2, each manganese atom gains 5 electrons during the reaction. This means that for two Mn atoms, as shown in the reaction, there is a total gain of 10 electrons. This is a classic example of a redox reaction, demonstrating the change in oxidation states and the fundamental concept of electron transfer.

Answer:

.000000022

Explanation:

H3O+=10^-pH

- Hope that helps! Please let me know if you need further explanation.

Answer: C. Pressure

Explanation:

Answer: 7.92%

Explanation:

I just answered the question and got it correct.

There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, the percent volume of pyrimidine in this solution is 79.1%.

Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution.

percent volume=(Volume of Solute/Volume of Solution)×100

Volume of Solute=38.0L

Volume of Solution= 442.0L + 38.0L=480L

substituting all the given values in the above equation, we get

percent volume=(38.0L/480L)×100

percent volume = 79.1%

Therefore, the percent volume of pyrimidine in this solution is 79.1%.

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The molarity of the solution is approximately 0.141 M. To find the molarity of the solution, we first need to calculate the number of moles of glucose present in the solution using the given mass of glucose and its molar mass.

The molar mass of glucose (C6H12O6) can be calculated by adding the atomic masses of its constituent atoms:

[tex]\[ \text{Molar mass of glucose} = 6 \times \text{Atomic mass of C} + 12 \times \text{Atomic mass of H} + 6 \times \text{Atomic mass of O} \][/tex]

Using the atomic masses provided by the periodic table:

[tex]\[ \text{Molar mass of glucose} = 6 \times 12.01 \, \text{g/mol} + 12 \times 1.01 \, \text{g/mol} + 6 \times 16.00 \, \text{g/mol} \][/tex]

[tex]\[ = 72.06 \, \text{g/mol} + 12.12 \, \text{g/mol} + 96.00 \, \text{g/mol} \][/tex]

[tex]\[ = 180.18 \, \text{g/mol} \][/tex]

Now, we can calculate the number of moles of glucose using the given mass of glucose:

[tex]\[ \text{Number of moles of glucose} = \frac{\text{Mass of glucose}}{\text{Molar mass of glucose}} \][/tex]

[tex]\[ = \frac{5.10 \, \text{g}}{180.18 \, \text{g/mol}} \][/tex]

[tex]\[ \approx 0.0283 \, \text{mol} \][/tex]

Next, we calculate the volume of the solution in liters:

[tex]\[ \text{Volume of solution} = 200.9 \, \text{mL} \times \frac{1 \, \text{L}}{1000 \, \text{mL}} \][/tex]

[tex]\[ = 0.2009 \, \text{L} \][/tex]

Now, we can find the molarity of the solution using the formula:

[tex]\[ \text{Molarity} = \frac{\text{Number of moles of solute}}{\text{Volume of solution in liters}} \][/tex]

[tex]\[ = \frac{0.0283 \, \text{mol}}{0.2009 \, \text{L}} \][/tex]

[tex]\[ \approx 0.141 \, \text{M} \][/tex]

Therefore, the molarity of the solution is approximately 0.141 M.

Answer:

The energy required to melt 9.070 kg of ice is 3047520 J

Explanation:

The mass, m of the ice = 9.070 kg = 907.0 g

The latent heat of fusion, [tex]L_f[/tex]° for ice = 3.36×10⁵ J/Kg

Therefore we have the formula for the energy required to melt the mass m equals

[tex]\Delta H = m \times L_f[/tex]

Plugging in the values, we have;

ΔH = 3.36 × 10⁵ J/Kg×9.070 kg  = 3047520 J or

ΔH = 3.36 × 10² J/g×9070 g  = 3047520 J

Therefore, the energy required to melt 9.070 kg of ice = 3047520 J.

Moles are produced when there is magnesium Explanation:

Answer:

You are one of the billions of people on our Earth. Our Earth orbits the Sun in our Solar System. Our Sun is one star among the billions in the Milky Way Galaxy. Our Milky Way Galaxy is one among the billions of galaxies in our Universe.

Explanation:

Hi!The solar system has a diameter more than 40 times greater than the distance to the sun, but the solar system is a tiny part of much larger galaxy. Our galaxy (Milky Way) is only one of billions of other galaxies in the universe.

Tube-dwelling worms contribute to the health of mudflat ecosystems by aerating the sediment and recycling nutrients, which supports diverse life and adds to the complexity of the food web. They provide essential services that help maintain ecosystem balance.

Tube-dwelling worms play a significant role in mudflat ecosystems. By burrowing into the sediment, the worms aerate the mud, which facilitates the penetration of oxygen and helps recycle nutrients. This process can enhance the productivity of the mudflat by supporting a diverse range of organisms. Tube-dwelling worms, like those around hydrothermal vents, form symbiotic relationships with bacteria. Although the worms you asked about are not the same as those at hydrothermal vents, the principle of symbiosis might still hold in their interactions with other organisms in the mudflat. The tube worms contribute to the complexity of the food web as they become prey for higher-order predator vertebrates. Therefore, their presence and activities are integral to maintaining the structural and functional integrity of the muddy environment they inhabit.

Biodiversity is vital for ecosystem resilience, economic benefits, and human health, with examples like the Amazon rainforest illustrating its importance. Biodiversity also provides essential genetic resources for breeding and holds undiscovered potential for scientific advancement.

Biodiversity is paramount due to its extensive benefits to ecosystems, the economy, and human health. With over 5 million known species, biodiversity contributes to the resilience of ecosystems, allowing them to recover from disturbances and providing a buffer against catastrophic events. An example of biodiversity is the Amazon rainforest, where a vast number of species coexist, each playing a role in maintaining the ecological balance. Economic benefits stem from biodiversity's direct provision of food, medicine, and raw materials, many of which we are yet to fully discover and understand. Biodiversity also ensures the availability of genetic resources which are crucial for crop and livestock breeding, leading to food security. Our current lack of knowledge about so many species indicates there is much more to learn, including potential breakthroughs in science and medicine that could enrich human life.

Answer:it is a

Explanation:

Answer:

B

Explanation:

Answer:

RADIATION IS THE PROCESS WHERE HEAT IS TRANSFERRED THROUGH ELECTROMAGNETIC WAVES THAT MOVE THROUGH SPACE.

Explanation:

Radiation is the transfer of energy in the form of waves through space or a  material medium. It involves the emission of energy through electromagnetic waves such as radio waves, x-rays, gamma rays. Also, particles such as electrons, protons and neutrons are regarded as radiations when they travel at high velocities. Radiation are categorized into two; ionizing and non-ionizing radiations depending on the energy the matter carries.  In ionizing radiation, matters carry sufficient energy which can be used to ionize atoms or molecules and even break chemical bonds; charged particles or ions are therefore produced in matter and such radiations include gamma rays, x-rays, alpha particles, beta particles.

'B. When heat gets transferred through electromagnetic waves that move through space' explains the process of radiation.

Radiation is a method of heat transfer that does not require any medium. This means that heat energy can travel through the vacuum of space. The Sun warming the Earth is a perfect example of radiation. Here’s how it works step-by-step:

Emission of Electromagnetic Waves: A hot object, such as the Sun, emits electromagnetic waves, which may include infrared radiation, visible light, and others.

Travel Through Space: These electromagnetic waves travel through the vacuum of space; no particles are needed to carry this energy.

Absorption: When these waves reach another object, like Earth, they get absorbed by the object’s surface, warming it up.

Different types of electromagnetic waves include radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Each type carries energy and can transfer heat through radiation.

Answer:

The answer IS NOT 448

it might be 0.448 but im not sure

Explanation:

i trusted the person above and it was incorrect so wanted to let yall know its not c

Answer:

C would be the answer.

Explanation:

Answer:

The answer is C. the distribution of electrons in different shells

Explanation:

I got it right on the test

Answer:

Im no scientist but I think its D. vacuole

Explanation:

Answer:

Pretty sure that its benzene

The correct equation to calculate [OH-] from [H+] is [OH-] = Kw / [H+], with Kw being 1.0 × 10^-14 at 25°C.

The correct equation to calculate [OH-] from [H+] is Kw = [H+][OH-], where Kw is the ion-product constant for water (1.0 × 10-14 at 25°C). You can rearrange this equation to solve for [OH-] if [H+] is known: [OH-] = Kw / [H+]. For example, if a solution has a hydronium ion concentration [H3O+] of 1.0 × 10-1M, the hydroxide ion concentration [OH-] can be calculated as follows: [OH-] = 1.0 × 10-14 / 1.0 × 10-1 = 1.0 × 10-13M.

Answer:

Roughly 323g of H2O.

Explanation:

Balance your chemical equation:

1 Fe3O4 + 4H2 → 3 Fe + 4 H2O

Modulate your stoichiometry 4 steps:

[tex]750g \times \frac{1mol}{55.8g} \times \frac{4mol}{3mol} \times \frac{18g}{1mol} = \\ = \frac{54000}{167.4} = \\ = 322.581g[/tex]

To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, 180g of H2O will be produced if 750 grams of Fe are produced.

Stoichiometry is a part of chemistry that help us in making relationship between reactant and product from quantitative aspects.

The balanced equation is

Fe[tex]_3[/tex]O[tex]_4[/tex]+ 4H[tex]_2[/tex] → 3Fe+ 4H[tex]_2[/tex]O

Molar mass of Fe=55.845 g/mol

mass of Fe=750 grams

Moles of Fe=13.4moles

The mole ratio between water and Fe is 3:4.

moles of  H[tex]_2[/tex]O produced=(3/4)×13.4moles=10.0

Mass of H[tex]_2[/tex]O produced=molar mass of H[tex]_2[/tex]O × number of moles of H[tex]_2[/tex]O

Mass of H[tex]_2[/tex]O produced=18× 10.0

Mass of H[tex]_2[/tex]O produced=180g

Therefore, 180g of H2O will be produced if 750 grams of Fe are produced.

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