Help with science pleaseee

Answer:

This is because earth is at a tilt, and the tilt is the cause of all seasons. In winter, we are the furthest from the sun due to the tilt.

Explanation:

Answer:

A. An atom

Explanation:

A large scale model is one that is bigger than the object itself. These are needed to visualise structures and behaviours that we cannot normally see. A large scale model is needed for small objects, such as an atom. Larger objects do not need even bigger models

Answer:

See explanation

Explanation:

The oxides or hydrides are formed by exchange of valency between the two atoms involved. The group of the atom bonded to oxygen or hydrogen in the binary compound can be deduced by considering the subscript attached to the oxygen or hydrogen atom.

Now let us take the journey;

R2O3- refers to an oxide of a group 13 element, eg Al2O3

R2O - refers to an oxide of group a group 1 element e.gNa2O

RO2 - refers to an oxide of a group 14, 15 or 16 element such as CO2, NO2 or SO2

RH2 - refers to the hydride of a group 12 element Eg CaH2

R2O7 - refers to an oxide of a group 17 element E.g Cl2O7

RH3- refers to a hydride of a group 13 element E.g AlH3

Answer:

A) Glycerol

Explana

Answer:

mechanical

Explanation:

cause mechanical energy is the sum of potential and kinetic enery

Answer:

H2O is a compound because its a main constitute of earths hydrosphere

Answer:

A

Explanation:

The golf ball has more inertia than the table-tennis ball, so it takes

more force to change the motion of the golf ball.

Answer:

to show that the consumer can use it in a way that the lab cant. with the consumer seeing that the product they're purchasing is good quality can lead to a demand for the product!

Explanation:

It is possible for a substance  to go directly from solid to gaseous state due to sublimation.

Sublimation is defined as a process in which transition  of a substance takes place  from solid to gas phase without passing through the intermediate liquid phase.

It is an endothermic process which occurs at temperatures and  pressure below the triple point. Reverse process of sublimation is deposition in which substances in gaseous phase directly go into solid phase.

It only refers to the change in state  and not for describing transformation  of substances. Sublimation requires an additional amount of energy and is an endothermic change proceeding with absorption of energy.

The enthalpy of sublimation is calculated by adding enthalpy of fusion and enthalpy of vaporization.

Learn more about sublimation,here:

https://brainly.com/question/9967928

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Answer: attract eachother and the force would decrease

Explanation:

Answer:

atoms from different elements

Answer:

A is √34

Explanation:

We can solve for the hypotenuse "A" using the Pythagorean theorem.  

a²+b²=c²

3²+5²=c²

9+25=c²

34=c²

√c=√34

c=√34 --> A

Just try ur Best ok your welcome

Answer:

The mass is 12.0107 but it rounds up to 12

Answer:

Chemical energy is the potential energy stored in the arrangement of atoms within molecules. Breaking chemical bonds requires energy, while forming new chemical bonds releases energy. The more energy that's released when a bond forms, the more stable that bond is.

Explanation:

Answer:

7.325 mol.

Explanation:

use the formula n=m/mr

so that makes:

234.4/16*2

which is 7.325 mol.

Answer:

EASSSSSYYY give me a harder question smh

if you want you can give me Brainliest answer lol

Explanation:

A solid’s particles are packed closely together. The forces between the particles are strong enough that the particles cannot move freely.

A liquid is a fluid that conforms to the shape of its container but that retains a nearly constant volume independent of pressure. The volume is definite (does not change) if the temperature and pressure are constant.

Gas molecules have either very weak bonds or no bonds at all, so they can move freely and quickly. Because of this, not only will a gas conform to the shape of its container, it will also expand to completely fill the container.

Answer:

What is your body made of? Your first answer may be that it is made up of different organs like the heart, lungs, and stomach, which work together to keep it going. Or you could go even closer and say that it is made of many types of cells. However, at the most basic level, your body — and indeed, all life, like everything that is not alive — is made up of atoms, often organized into larger structures called molecules

Explanation:

Answer:

42.9158 m/s

Explanation:

the answer is there above

Explanation:

Assume the gases each diffuse in one second, in order to create a rate.

Set rate1 = N2 = x

Set rate2 = CH4 = 0.530 m/sThe molecular weight of N2 = 28.0

The molecular weight of CH4 = 16.0

Graham's Law is:

r1 over r2 = √MM2 over √MM1

Substituting, we have:

x / 0.530 = √(16.0 / 28.0)x = 0.400 m/s

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question we have

mass = 2.54 × 200

We have the final answer as

Hope this helps you

Answer:

density = 7.83g/mL

It will sink in water.

Explanation:

D = mass/volume

94/12 = 7.83 g/mL

density of water is 1g/mL

Object is more dense than water, meaning it will sink.

Answer:No

Explanation:

Well yes but no, There cant be high tempreture that is 100 degrees and a low tempreture that is 20 degress, there has to be a mid inbetween both, they cant be next to eachother.

Answer:

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Explanation:

Plants rely directly on the energy from the sun. The chloroplast create glucose from the sun rays through a process known as photosynthesis. Mushrooms, on the other hand, do not have the ability to use the sun's rays to create food, so they instead gather their energy from the nutrients from the soil or decaying things, such as plants, that once used the sun's radiation as sustenance. So basically mushrooms use the radiant energy from the sun indirectly and plants use it directly

Answer:

The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.

Answer:Find it

Explanation:

Aluminium-27 is an isotope of aluminium characterized by the fact that is has a mass number equal to  

27

.

Now, an atom's mass number tells you the total number of protons and of neutrons that atom has in its nucleus. Since you're dealing with an isotope of aluminium, it follows that this atom must have the exact same number of protons in its nucleus.

The number of protons an atom has in its nucleus is given by the atomic number. A quick looks in the periodic table will show that aluminium has an atomic number equal to  

13

.

This means that any atom that is an isotope of aluminium will have  

13

protons in its nucleus.

Since you're dealing with a neutral atom, the number of electrons that surround the nucleus must be equal to the number of protons found in the nucleus.

Therefore, the aluminium-27 isotope will have  

13

electrons surrounding its nucleus.

Finally, use the known mass number to determine how many neutrons you have