Jason took 6 hours to travel 540 km. For the first 140 km, he took 2 hours.
What was his average speed during the first two hours? ___ km/h
How much distance did he cover in the last four hours of his journey? ___ km
What was his average speed for the rest of the journey? ___ km/h

Answer:

Hey this is your answer 59.05.

Explanation:

C) $18.06 \times {10^{23}}$ D) $24.08 \times {10^{23}}$ Hint: In order to find the number of atoms in 48 g of Mg, use the formula which relates the number of particles/atoms with the Avogadro number and number of moles of the substance and this required formula is: number of atoms = number of moles × Avogadro's number.

Please can I have brainliest :]

Answer:

See explanation

Explanation:

Aluminium is an amphoteric metal. This means that it reacts with both acids and bases. This property of aluminium is important in the discussion below.

Aluminium cookers can not be used to cook acidic food because it will react with the food and this is not good both for the food and the cooker.

Also, It is not possible to clean an aluminium pot with sodium hydroxide because the sodium hydroxide will react with the pot yielding hydrogen gas since aluminium is amphotheric as follows;

2Al + 2NaOH + 2H2O → 2NaAlO2 + 3H2

Aluminum has been the metal of group 13 of the periodic table. Aluminum has been reacting with capability with both acids and bases.

A. The acidic food has not been cooked in the aluminum wares with the ability of Aluminum to react with the acid of the food and change the chemical composition.

B. The aluminum can react with the bases and acids. The reaction of aluminum with NaOH has resulted in the liberation of hydrogen gas with the formulation of sodium tetrahydroxoaluminate.

The compound has been easy to clean, and thus NaOH solution is used for cleaning and etching of aluminum.

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Answer:

a,water particles are set in a circular motion

Answer:

When energy is transferred through a wave it's water particles are set in a circular motion. The answer is A, I hope this helps you.

Answer:

142.0 moles CO₂

Explanation:

To answer this question, we first need to know what a mole is. A mole represents [tex]6.022 \cdot 10^{23}[/tex] of something, and in this case, that something is molecules.

So, to convert [tex]8.551 \cdot 10^{25}[/tex] molecules into moles, we need to use the conversion factor  [tex]1=\frac{6.022\cdot 10^{23} \text{molecules} }{ \text{1 mole}}[/tex].

Doing so (using dimensional analysis) gives us:

[tex]8.551 \cdot 10^{25} \text{ molecules } \cdot \frac{\text{1 mole}}{ 6.022\cdot 10^{23} \text{ molecules} } = \frac{8.551 \cdot 10^{25}}{ 6.022\cdot 10^{23}} \text{ moles CO}_2 = \\ \\ 141.996 \text{ moles CO}_2 = \boxed{142.0 \text{ moles CO}_2 }[/tex]

Silicon Oxide would probably be it.

Answer:

State is shown inside the parenthesis.

s is for solid

aq is for aqueous solutions

l for liquid

Answer:

759779.6 torr

Explanation:

Initial volume, V₁ = 4001 mL

Final volume, V₂ = 3002 mL

Initial pressure, P₁ = 750.1 atm

We need to find the final pressure at a constant temperature. Let it be P₂. [tex]P_1V_1=P_2V_2\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{750.1\times 4001 }{3002 }\\\\P_2=999.71\ atm[/tex]

We know that,

1 atm = 760 torr

So,

999.71 atm = 759779.6 torr

Hence, there will be 759779.6 torr pressure.

Answer:

See below

Explanation:

The following reasons tell why atom combine to form compounds:

1) They want to follow octet or duplet rule and attain the noble gas configuration.

2) They combine to form compounds because of the electrostatic attraction between them.

3) They form compounds to lower their energy and to become stable.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Answer:

Liquid isopropanol.

Explanation:

Liquid isopropanol will evaporate earlier than water because the boiling point of isopropanol is less than water. That liquid which have high boiling point require more heat energy for change into vapor state as compared to those liquids that has low boiling point. The isopropanol has boiling point i.e. 82.5 °C while on the other hand, water has boiling point i.e. 100 °C so we can say that isopropanol will evaporate first.

The liquid that will be the first to evaporate within 5 minutes is; Liquid Isopropanol

We have the 2 liquids as;

Liquid Isopropanol

Liquid water

Now, since we are dealing with the one that will evaporate within five minutes, we need to know their boiling points.

From online research;

Boiling point of liquid isopropanol is 82.5°C

Boiling point of liquid water is 100°C

Now, we are told that the same energy is transferred for both liquids. However, boiling point of the liquid with the lower boiling point will be achieved first and as a result will evaporate first since the next stage after boiling point is evaporation of steam.

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Answer:

27J

Explanation:

Answer:

a full moon or new moon

Explanation:

Answer:

In fact, a full scuba tank will gain about 5-6 psi for every degree of temperature increase. This is one reason that full tanks should not be left in a hot trunk of a car. A tank filled to 3000 psi could easily reach 3500 psi if the temperature of it increased substantially.

Answer:

197.0 amu

Explanation:

Answer:

If you're just looking at the Lewis Structure from the perspective of the octet rule, it does appear that the structure is correct. Dinitrogen always has a lone pair of electrons which could conceivably be used for dative bonding as you suggest. So from that perspective there appears to be nothing wrong at all - other than that it doesn't exist in nature in this way.

Explanation:

Answer:

Potential energy is energy that is stored in an object or substance. Gravitational potential energy is energy in an object that is held in a vertical position. Elastic potential energy is energy stored in objects that can be stretched or compressed.

Explanation:

In body= The energy was stored as chemical potential energy in specific bonds within molecules in your muscle cells, specifically ATP molecules.

In energy= Potential energy is stored energy, whereas kinetic energy is the energy of moving things.

Answer:

Potential energy is energy that is stored in an object or substance.

Explanation:

Gravitational potential energy is energy in an object that is held in a vertical position

Elastic potential energy is energy stored in objects that can be stretched or compressed.

Answer:

the answer is B

Explanation: Trust me I took the test

The correct option is option B which is electrical to mechanical.

When using a power drill, the energy transformation that occurs is from electrical energy to mechanical energy. The power drill is powered by electricity, which is converted into mechanical energy to rotate the drill bit and perform the desired work. The electrical energy is converted into the mechanical energy of rotational motion.

Hence, the correct option is option b

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#SPJ2

Answer:

The answer is B- LiNO3(aq)+H2O(I)

Explanation:

I just did the assignment also UNUS ANNUS

Answer:

b

Explanation:

Answer:

A

Explanation:

It has the lowest ionisation energy

Answer:

Beryllium

Explanation:

Answer:

about 4.8kJ

Explanation:

There is some missing information in the question given.

For use to determine the amount of heat that must be reacted in the system to convert 100g of NaNO₃ into NaHSO₄(s);

Then, we need to consider the following reaction between sodium nitrate (NaNO₃)  and sulfuric acid (H₂SO₄):

[tex]\mathbf{NaNO_{3(s)}+ H_2SO_{4(l)}\to NaHSO_{4(s)}+HNO_{3(g)} \ \ \ \ \ \Delta H = 21.2 \ kJ}[/tex]

From the above reaction, 84.99 gm of NaNO₃ reacted with H₂SO₄ which is converted into NaHSO₄ thereby absorbing 21.2 kJ amount of heat.

This implies that; if 84.99 gm of NaNO₃ absorbs 21.2 kJ amount of heat.

1 gm of NaNO₃ will absorb = [tex]\mathsf{\dfrac{21.2}{84.99} \ kJ \ heat}[/tex]

= 0.2494 kJ amount of heat.

∴

100 g of NaNO₃ will absorb [tex]= \mathsf{\dfrac{21.2}{84.99} \times 100 \ kJ \ heat}[/tex]

= 24.94 kJ amount of heat.

Therefore, we can conclude that the amount of heat that must be absorbed by the reaction system to convert 100g of NaNO3 into NaHSO4(s) is 24.94 kJ.

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Answer:

Hydrogen Bonds Make Water Sticky

Explanation:

This sticking together of like substances is called cohesion. Depending on how attracted molecules of the same substance are to one another, the substance will be more or less cohesive. Hydrogen bonds cause water to be exceptionally attracted to each other. Therefore, water is very cohesive.

Answer:

ik right

Explanation:

Answer:

The eye is an organ that detects light and sends signals along the optic nerve to the brain.

Explanation:

In humans, the eye is a valuable sense organ that gives us the ability to see. It allows for light perception and vision, including the ability to differentiate between colors and depth.Although small in size, the eye is a very complex organ. The eye is approximately 1 inch wide, 1 inch deep and 0.9 inches tall. The human eye has a 200-degree viewing angle and can see 10 million colors and shades. Humans have two eyes which allows us to have better depth perception and binocular stereopsis.

Hope this helps

Answer:

Explanation:

Hi I'm so sorry hope you have a good day