2. What is true about the position of all metals in
the periodic table?
A. They are in the first group.
B. They are in the bottom period.
C. They are in the rightmost column.
D. They are to the left of the zigzag line.

Answer: i think

lithium

potassium

Answer:

i honetly dont thing anyone knows that so look it up

Explanation:

The mass of Tin in alloy = 50 g

Given

10% tin, 16% antimony, and 74% lead.

mass of alloy = 500 g

Required

grams of tin

Solution

The mass percent of each component of the mixture shows the mass ratio of each component

%tin in alloy = 10%, so mass of tin :

[tex]\tt 10\%\times 500~g=50~g[/tex]

Answer:

Expands

Explanation:

I don't know if that's an option but i hope it helps.

Explanation:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

Answer: c extracting oil

Explanation:

Saudi Arabia is known for there huge oil market

Answer:

a process which occurs when there is a difference in solute concentration between two solutions separated by a semipermeable membrane.

hope this helps

The  correct path of how energy flows in a food chain is option A. producer, consumer, predator, decomposer.

Here the producer gets the energy from the sun and photosynthesis after that it should be eaten by the consumer that is preyed from the predators and after that the last one is a decomposer.

hence, we can conclude that The  correct path of how energy flows in a food chain is option A. producer, consumer, predator, decomposer.

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Answer:

Explanation:

Hope this Helps!

:D

Explanation:

An atom is the smallest indivisible particle of any substance that takes part in a chemical reaction.

All atoms are identified by the number of protons in them. Protons are the positively charged particles in an atom.

Therefore, atoms and ions are similar because the atom and ion of an element have the same number of protons but differs in the number of electrons they carry.

Answer:

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. Heat energy is transferred from hot places to cooler places by convection. Liquids and gases expand when they are heated. ... As a result, the particles take up more volume.

The thermal energy is transferred in convection through the movements of fluids, such as air or water.

Thermal energy refers to the energy associated with the movement of particles in a system. As temperature increases, the particles in a substance gain kinetic energy and move faster, resulting in an increase in thermal energy.

When a fluid is heated, its molecules gain kinetic energy and begin to move faster, causing them to spread out and become less dense. This creates a region of warm, less dense fluid that rises upward due to buoyancy.

As the warm fluid rises, cooler, denser fluid moves in to take its place, creating a convection current. This process continues as long as there is a temperature difference between the warm and cool fluids. The movement of the fluids transfers thermal energy from the warmer areas to the cooler areas.

Therefore, In convection, thermal energy is transferred through the movement of fluids, such as air or water.

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Answer:

1 ans =The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons gives rise to the cohesive or binding force that holds the metallic crystal together.

Answer:  A spray of perfume diffusing in a room is a spontaneous process because gas particles have higher entropy when they are spread evenly around the room.

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

Spontaneous reactions are those reactions which takes place on their own and do not require any external energy source. Spontaneous reactions are always accompanied by an increse in entropy.

Thus a spray of perfume diffusing in a room is a spontaneous process because gas particles have higher entropy when they are spread evenly around the room.

Answer:

It's noble gas & they have filled p sublevels

the answer above isn't complete

Explanation:

pictures below

Answer: A. Pedaling a bicycle

Explanation: i also have the same question too and im in 5th grade

Answer:

468

Explanation:

Answer:

Chemical Change

Explanation:

Answer:

TT and Tt genotypes both expressed the tall phenotype because the T is dominant to t. Only the tt genotype expressed the short phenotype.

Explanation:

Hope this helped!

Answer:

Isotope

Explanation:

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.

Answer:

Solution: 3.78 L He. 22.4 L. 1 mol. = 0.169 mol He.

Explanation:

Answer:

3.78 liters

Explanation:

If a balloon is filled with 3.78 L of He gas is at STP.

Heat energy needed : 3.5 x 10⁷ kJ

Heat is a form of energy that can flow from high-temperature objects to low-temperature objects.

So heat moves when there is a difference in temperature and can increase or decrease the temperature. An object that receives a lot of heat will cause a large increase in temperature

The amount of heat is influenced by the mass of the object and the difference in temperature

Can be formulated

Q = m.c.Δt

Q: heat received or removed by an object (J)

m: object mass (kg)

c: heat type substance (J / kg⁰C)

ΔT: temperature change (⁰C)

210 kJ of heat energy is used to form 3.0 moles of Hydrogen, so heat energy for 1 mol Hydrogen :

[tex]\tt \dfrac{210}{3}=70~kJ/mol[/tex]

mol of 1000 kg of Hydrogen=10⁶ g(MW=2 g/mol)

[tex]\tt \dfrac{10^6~g}{2}=5.10^5[/tex]

The heat energy :

[tex]\tt 70~kJ/mol\times 5.10^5~mol=3.5\times 10^7~kJ[/tex]

Answer:

[tex] SF_{6}[/tex]

Explanation:

Let the compound be x.

Given the following data;

Sulfur, S = 3.21g

Fluorine, F = 11.4g

Atomic mass of sulfur = 32.07g

Atomic mass of fluorine = 19g

Amount of moles for sulfur;

3.21*(1/32.07) = 0.10mol

Amount of moles for fluorine;

11.4*(1/19) = 0.60mol

We then divide by the smallest to find the ratio;

(0.10/0.10) = 1 Mol of sulfur.

(0.60/0.10) = 6 Mol of fluorine.

Therefore, the ratio of sulfur to fluorine is 1:6.

Compound x = [tex] SF_{6}[/tex]

Hence, the empirical (simplest) formula of the compound is [tex] SF_{6}[/tex]

Taking into account the Boyle's law, the correct answer is option A.) If all the gas in container A is transferred to a small container, B, with no change in temperature, the pressure in container B will increase.

The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature, and moles.

As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them less times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls.

In this way pressure and volume are related, determining Boyle's law (on of the gas laws) which says:

"The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure"

That is, if the pressure increases, the volume decreases; whereas if the pressure decreases, the volume increases.

In summary, the correct answer is option A.) If all the gas in container A is transferred to a small container, B, with no change in temperature, the pressure in container B will increase.

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Answer:

C. it's change in form....

Hope this helps...... Stay safe and have a Merry Christmas!!!!! :D

Answer:Potential and kinetic energy

Explanation:

Answer:

Explanation:

1. Weight = 35 P and 45 N = 80

2. Atom:  35P = 35 electrons

3. Bromine

4. It's a non metal. It's in column 17. It will gain 1 electron (normally).

5. Ion: 35 protons, 36 electrons

6. Charge: - 1 usually, but there are exceptions

7. Anions go to the Anode. The anode attracts minus charged elements.

8. In an uncharged state, element 36 would be next. That would be  Krypton which is always uncharged. It is a noble gas.

Answer:

I'm sure it's D.

Explanation:

They obtain evidences by recording and studying seismic waves.

Answer: D. It Increases reaction rates.

Explanation:

Answer:

D. It Increases reaction rates.

Explanation: