can someone help me with this?

Answer:

B. Fuel cell cars reduce use of non-renewable fossil fuels

Explanation:

Answer:

Explanation:    

Answer:

Option (2)

Explanation:

Boyle's states that at constant temperature, volume of a gas is inversely proportional to the pressure exerted by the gas.

In other words, at constant temperature, multiplication of pressure and volume of the gas is constant.

PV = k

Here 'k' = constant

From the graph attached,

[tex](V_3,P_3)[/tex] represents (0.5, 200).

0.5 × 200 = k

k = 100

For pressure 'P' = 150 kPa

150 × V = 100

V = [tex]\frac{100}{150}[/tex]

V = 0.67 L

Option (2) is the answer.

Answer:

2 is the right answer so be it

Answer:

it's a combination of the fact that Chinese culture rose out of two of its major rivers,yellow and yangzi. these rivers provide fertile soils conducive to farming .

Explanation:

later on , near the turn of 19th century population migrated to the coastal cities

Answer

the land is too fertile for people to grow crops

Explanation:

...

The number of atoms present in 64.0g of Oxygen are 24.092 × 10²³.

Atoms are the number of molecules that are present in an element. The atoms will be of the same species or different species. Atoms also contain charged particles that constitute the atomic number or atomic mass.

The molar mass of oxygen is 16 grams, which means that 1 mole of oxygen weighs 16 grams.

Therefore, 64-gram oxygen

To calculate the moles, the mass is divided by the molar mass

Putting the value in the formula

64/16 = 4 mole oxygen.

1 mole of any element contains 6.022 x 10²³ atoms in it.

The number of Oxygen atoms in 64 grams of Oxygen gas is

24.088 × 10²³ = 24.092 × 10²³

Thus, the atoms present in 64.0g of Oxygen are 24.092 × 10²³.

To learn more about atoms, refer to the below link:

https://brainly.com/question/21896366

#SPJ2

Answer:

Sublimation

Explanation:

Sublimation is the term used to describe when a solid "skips" the liquid phase and turns directly into a gas from solid form. Dry ice demonstrates sublimation when exposed to room temperature air.

Answer: Organisms breakdown __into smaller particles___ in order to produce__new compounds__?

Explanation:

branliest pls :)

Answer:

0.43 M

Explanation:

Use the dilution equation: M1V1 = M2V2

M1 = 13 M

V1 = 10 mL

M2 = ?

V2 = 300 mL

Solve for M2 --> M2 = M1V1/V2

M2 = (13 M)(10 mL) / (300 mL) = 0.43 M

Answer:

i don't know the answer now please sorry for the day before the end of the following is Open you have a good time with the button in the top right of

Answer:

3*0.35L = 1.05L

Explanation:

For part A, we need the ratio of moles of propane to moles of oxygen to get the volume of oxygen required.

The equation tells us there are 5 moles of oxygen gas required to combust 1 mole of propane.

So the required volume of oxygen is 5*0.35L = 1.75L

The equation also tells us that 3 moles of carbon dioxide are produced from the combustion of one mole of propane.

Therefore the produced volume of carbon dioxide is 3*0.35L = 1.05L

Answer:

B. Calculate the mass of iron produced from the reaction

Explanation:

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The factors affect wave height is the duration of the wind

Answer:

all answers are correct

Fetch

Strength of wind

Direction of the wind

Duration of wind

Explanation:

i took the quiz hope this helps!

Answer:

Boron

Explanation:

Answer:

Boron

Explanation:

Boron is the first element of Group 13 and is the only metalloid of the group. Its chemical symbol is B, and it has an atomic number of 5. Boron has the electron configuration [He] 2s 2 2p 1 and prefers an oxidation state of +3. Boron has no natural elemental form; it forms compounds which are abundant in the Earth's crust.

Answer:

See Explanation

Explanation:

A decreasing temperature indicates that the dissolution process for the ammonium chloride requires input of energy from surroundings. That is, the process is essentially 2 parts => system (object of interest - NH₄Cl) and the surroundings (everything else - solvent - H₂O). The surroundings (water) solvent is showing a measured decrease in temperature or loss of energy (exothermic to surroundings) which flows into the system (NH₄Cl) and effects dissolution of salt into solution (endothermic to system).

Answer:

Mass of the second spaceship is 3.10 × 10⁴ kg 0r 31000 kg

Explanation:

From Newton's law of universal gravitation, the force of attraction , F, between two bodies is directly proportional to the product of their masses and inversely proportional to the square root of the distance between them.

F = Gm₁m₂/d²

m₁ = 24000 kg

m₂ = ?

d = 300 m

F = 5.51 × 10⁻⁷ N

Gravitational constant,  G = 6.67 × 10⁻¹¹ N.m²/kg²

Making m₂ subject of the formula : m₂ = F × d² / G × m₁

m₂ = 5.51 x 10⁻⁷ × 300 × 300 / 6.67 × 10⁻¹¹ × 24000

m₂ = 3.1 × 10⁴ kg

Therefore, Mass of the second spaceship is 31000 kg

Answer:

8

Explanation:

Rocky planets:

Mercury

Venus

Earth (We are here)

Mars

Gas giants:

Jupiter

Saturn

Uranus

Neptune

Hi!there are 8 planets in the solar system they are=

(there was one more planet Pluto but in 2006 scientists said that Pluto was not a planet but a drawf planet)

Answer:

7:4

Explanation:

The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 4 and oygen is 7.

Answer:

It is Sample 3, so C

Explanation:

This is because most metals would be solid but this is probualy mercury and it has a pretty low boiling point, and all the other samples are either weak/break easily with a hammer which metals dont do that, and theres a gas, obviously not so if you use process of elimation and common sense, its C

Answer:

52- the 30 he has already = $22

22/5= 4.4

he will have to babysit 5 times

Answer:

34.429%

Explanation:

Answer:

An example of heatwaves showing physical and chemical change is with a burning candle, when a candle burns, there is both a physical and chemical reaction.

The physical change is quite obvious and in fact, it can be seen. When the candle burns, the wax slowly melts and the candle gets smaller and smaller. This wax, as can be seen, will drip onto the candle and stick to it. When this wax forms back into a solid and stays on the candle, that is another physical change that can occur.

The chemical reaction can be a little less obvious. The first is that the heat produced by the candle consumes both the oxygen around it, as well as the fuels coming from the flame. This will then lead to carbon dioxide emissions produced by the flame, which by the way should never be inhaled. This is the chemical change that takes place in the reaction.

Answer: Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.

Answer:

Salt is a chemical compound with a number of interesting properties: Crystals or white crystalline powder. Transparent and colourless in crystalline form – rather like ice. Crystallises in the isometric system, usually in the form of cubes.

Explanation:

give the first answer brainliest, im just fixing thier spelling

Answer:

KO₂ is limiting reactant

Explanation:

Based on the balanced reaction:

2CO₂ + 4KO₂ → 2K₂CO₃ + 3O₂

2 moles of CO₂ react with 4 moles of KO₂.

Thus, for a complete reacction of 0.25 moles of CO₂ are required:

0.25 moles * (4moles KO₂ / 2moles CO₂) = 0.5 moles of KO₂

As there are just 0.1 moles:

Answer:

It's a metaphor. It's comparing Jordan and their emotions to a tornado

Answer:

Ye,,it is true that Mars is bigger than mercury.

Explanation:

Actually,Mercury is the smallest planet in the solar system.