gots another for you guys thanks inn advance

Answer:

D. all of the elements of Group 18 in orange boxes

Answer:

The bond formed between XY is "Ionic bond"

Explanation:

The bond is ionic bond because the compound XY is formed due to the gaining and loosing of electrons

Properties of Ionic compounds:

They form crystals

They are good insulators

They have high melting and boiling points

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.

.

Hope it helps

Explanation:

total heat = Heat required to convert 2 kg of ice to 2 kg of water at 0 °C + Heat required to convert 2 kg of water at 0 °C to 2 kg of water at 20 °C.

Heat=mhfg+mCpΔT

Here, m ( mass of ice) = 2 kg

hfg (latent heat of fusion of ice) = 334 KJ

Cp of water (specific heat) = 4.187 KJ/Kg-K

ΔT(Temperature difference) = 20 °C

Therefore, Heat required = 2 x 334 + 2 x 4.187 x (20 - 0 )

Heat reqd= 835.48 KJ

Therefore, to melt 2 kg of ice 835.48 KJ of heat is required.

Answer:

HCL, H2

Explanation:

Assuming this is a Redox reaction, we know that metal + acid = salt + hydrogen therefore we can say it is HCL and H2

Answer:

1.Sulfur dioxide and nitrogen oxide

2.a)it forms carbonic acid

b)

3.the community can use renewable energy like solar and wind power cause they produce less pollution

Answer:

Explanation:

As,

Law of reflection states that , angle of incidence is always equal to angle of reflection.

Neutrons and protons are almost exactly the same size

Explanation:

(a neutron has about 1/10th of one percent more mass). ... Carbon has 6 protons, so its atomic number is 6; oxygen has 8 protons, so its atomic number is 8. Uranium has 92 protons, so its atomic number is 92!

Answer:

neutrons

Explanation:

it’s for Acellus

Answer:

electrolyte

Explanation:

True.

The Mass Undergoes change only in ( Solid state to liquid state ) Ice Cube to Water .

Mass changes from mg to litre.

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Answer:

it will come answer 21 write

Answer:

The Cenozoic Era is generally divided into three periods: the Paleogene (66 million to 23 million years ago), the Neogene (23 million to 2.6 million years ago), and the Quaternary (2.6 million years ago to the present); however, the era has been traditionally divided into the Tertiary and Quaternary periods.

Answer

level 2 to 4

Explanation:

i guessed cause im just that cool

Answer:

y = 2.77 cm

Answer: The third dimension is 2.77 cm

Answer:

95

Explanation:

94.5 contains 3 significant figures so to round it to just two, we can just round the number to the nearest whole number. Remember that we round up if we have 5 and up then we would round down if we have 4 and below.

94.5 → 95

Best of Luck!

Answer:

If you left your aqueous sodium sulfite solution open on the side, atmospheric oxygen would cause the chemical change, the water would hydrate the new compound and the slow evaporation of water would give you lovely large crystals of Na2SO4 without you having to do anything!

Answer:

If you left your aqueous sodium sulfite solution open on the side, atmospheric oxygen would cause the chemical change, the water would hydrate the new compound and the slow evaporation of water would give you lovely large crystals of Na2SO4 without you having to do anything!

Answer:

Explanation:

the tendency for items have 2 electrons in their outermost shell by interacting with others items through electron sharing or transfer is known as duplet rule. if an atom has 2 electrons in it's outermost shell then it is called duplet rule and if a 8 electrons in it's outermost shell than it is called octet rule .

Answer:

electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.

Explanation:

The water eventually is released to the atmosphere as vapor via the plant's stomata — tiny, closeable, pore-like structures on the surfaces of leaves. Overall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves is known as transpiration

Through transpiration, plants move enormous quantities of water from the soil to the air.

Transpiration is the process by which plants lose water vapor through small openings called stomata in their leaves. Water is taken up by the roots from the soil and transported to the leaves through the xylem vessels. Once in the leaves, water evaporates from the surface of the cells and exits through the stomata into the surrounding air.

This continuous loss of water through transpiration creates a pulling force, known as the transpiration pull or tension, which helps to draw water upward from the roots. As water molecules evaporate from the leaves, more water is pulled up through the plant's vascular system to replace the lost water.

Transpiration not only aids in the transport of water and nutrients from the roots to the rest of the plant, but it also plays a crucial role in regulating the plant's temperature, maintaining cell turgidity, and facilitating the movement of minerals within the plant.

To know more about transpiration here

https://brainly.com/question/32368258

#SPJ2

Answer:

Explanation: The total volume (rock plus water) in the graduated cylinder is 34 mL. We know the volume of water in the cylinder was 20 mL. Therefore, the volume of the rock must be 14 mL. Because a milliliter is exactly the same volume as a cubic centimeter, the volume of the rock is 14 cm3.

Explanation:

Image result for The unit of volume is mL. Make sure to check the units of graduation to get the most accurate reading possible

Graduated cylinders have numbers on the side that help you determine the volume. Volume is measured in units called liters or fractions of liters called milliliters (ml).

Answer:

Once I read a NASA post where they were saying that the universe keeps expanding as matter keeps forming and cooling down thus adding to the size of the universe so keeping this in mind, the best answer choice is, option A. The universe is currently expanding and will continue to expand.

The hypothesis which is most supported by astronomers is that universe

is currently expanding and will continue to expand.

They are scientists which study  planets, stars, and other celestial bodies.

They have strong beliefs on Big bang theory.

The theory states that the Universe was formed as a result of a big bang in

which one point began to expand . This is why option A is the most

appropriate.

Read more about Astronomers here https://brainly.com/question/10826203

Answer:

use secondary data. the normal method to use

Answer:

Collecting gas over waterWhen collecting oxygen gas and calculating its partial pressure by displacing water from an inverted bottle, the presence of water vapor in the collecting bottle must be accounted for; this is easily accomplished using Dalton’s Law of Partial Pressures.

Answer:

jrikgni

Explanation:j

55

Answer:

The balloon will shrink bcuz the average kinetic energy of the helium gas particles in the balloon decreases when the temp decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon. The pressure will also decrease bcuz air pressure is the total force per unit area