:answer question number 7

Answer:

C

Explanation:

Li has an electronegativity of 0.98, O has an electronegativity of 3.44. 3.44-0.98= 2.46 electronegativity differnece :)

Answer:

Radioactive Decay

Explanation:

Answer:

Where are the categories, we need an image for reference or something to better understand the question

Answer:

Chemical

Explanation:

Answer:

Average amu is 6.52556

Explanation:

Average the numbers

Add the two masses together.

6.01512+ 7.01600= 13.03112

Then divide by 2, we divide by 2 because that is how many #'s we are given.

13.03112/ 2= 6.52556

Answer:

A.Rn,Ne,Ar,Kr.......

Answer:

60N

Explanation:

The net force on the cabinet is 60N.

 Net force is that single force that will act like all other forces on a body. The direction of the force and magnitude is very important when resolving forces.

  Force applied by Mrs. Moran  = 30N

  Force applied by Mr. Moran = 30N

                Since they each stood on both sides and pushed, the net force will be 30N + 30N  = 60N

Answer: 0

Explanation: If they both pushed a force of 30N then it doesn’t add up but instead you subtract. so it’s 0. ur yw ;)

Answer:

Complex carbohydrates have more chemical bonds to break than simple sugars, which takes longer for the body to digest and provides more units of energy for the body to use.

Explanation:

Complex carbohydrates contain longer chains of sugar molecules than simple carbohydrates. The body converts these sugar molecules into glucose, which it uses for energy. As complex carbohydrates have longer chains, they take longer to break down and provide more lasting energy in the body than simple carbohydrates.

Answer

The answer is A if you want it simplifited.

from the guy above

Explanation:

Sugar=12 carbon+22 Hydrogen+11 oxygen

marble =Calcium+Carbon×3 oxygen

Natural gas=Nitrogen +4 Hydrogen

Rubbing Alcohol=3 carbon +8 Hydrogen+Oxygen

Glass=Silicon +2 oxygen

Answer:

12 Carbon + 22 Hydrogen + 11 Oxygen

Calcium + Carbon + 3 Oxygen

Carbon + 4 Hydrogen

3 Carbon + 8 Hydrogen + Oxygen

SIlicon + 2 Oxygen

Explanation:

Can I have brainliest? TYSMMMMMMMMMMMMMMMMm

Answer:

E = 3.81×10 ⁻²¹ J

Explanation:

Given data:

Frequency of photon = 5.75 ×10¹² Hz

Plancks constant = 6.626 ×10⁻³⁴ Js

Energy of photon = ?

Solution:

E = h×f

E = 6.626 ×10⁻³⁴ Js ×  5.75 ×10¹² s⁻¹

E = 38.1×10 ⁻²² J

E = 3.81×10 ⁻²¹ J

Answer:

Lipids

Explanation: Lipids are, in fact, the only non-polymer organic molecules.

Answer:

3.5ML

Explanation:

At the constant pressure, the final volume of the carbon dioxide gas was equal to 4.62 ml at a temperature of 0ºC.

Charles's law can be explained as when the pressure of the gas is kept constant, the volume of gas is directly proportional to the temperature of a gas.

The volume of the gas and the temperature of the gas have a direct relationship according to this law.

Therefore, V∝ T

or    V₁/T₁ = V₂/T₂                                               ....................(1)

Given, the initial temperature of the CO₂ gas, T₁ = 22 ºC

T₁ = 22 + 273 = 295 K

The final temperature of the CO₂ gas, T₂ = 0ºC

T₂ = 0 + 273 = 273 K

The initial volume of the gas, V₁ = 5 ml

Substitute the value of V₁, T₁, and T₂ in equation (1 ) to get final volume of CO₂ gas:

5/295 = V₂/273

V₂ = 4.6 ml

Therefore, the final volume of the gas is equal to 4.6 ml at 0 ºC, when there is no change in the pressure.

Learn more about Charles's law, here:

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Explanation:

Put the pan into a water-containing dish and mix well. Now use a strainer to transfer the solution into another jar. The salt should disappear in it. 

And using a tube with a filtrate, transfer the salts that has sand into another bottle with a filtrate. Therefore the sand is split. Eventually, when all the water vaporizes and the salt stays in the bottle, leave the extra solvent and heat it.

Based on the diagram, the statement explains how energy is conserved during this chemical reaction is the potential energy lost by the reaction suystem (B) is gained by the surroundings.

Those reactions in which eneregy is released during the whole process, because energy of product is less than the energy of reactants.

In the given diagram it is given that energy of the reactants are more as compare to the products, so the reaction is exothermic in reaction means heat is released during this reaction. This released energy will absorb by the surrounding of the reaction system to maintain the law of conservation of energy.

Hence, option (D) is correct.

To know more about exothermic reaction, visit the below link:

https://brainly.com/question/6357350

The statement that explains how energy is conserved during this chemical reaction is the potential energy lost by the reaction system (B) is gained by the surroundings.

The law of conservation of energy says that the energy of an isolated system never changed.

The energy neither be created nor destroyed.

Thus, the correct option is D. the potential energy lost by the reaction system (B) is gained by the surroundings.

Learn more about conservation of energy

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Answer:

In engineering and science, dimensional analysis is the analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric charge) and units of measure (such as miles vs. kilometers, or pounds vs. kilograms) and tracking these dimensions as

Explanation:

Answer:

Gravity is a powerful force.

Explanation:

Answer:

0.417 J/gºC

Explanation:

From the question given above, the following data were obtained:

Heat (Q) absorbed = 2500 J

Mass (M) of substance = 100 g

Initial temperature (T1) = 10 °C

Final temperature (T2) = 70 °C

Specific heat capacity (C) =?

Next, we shall determine the change in temperature (ΔT). This can be obtained as follow:

Initial temperature (T1) = 10 °C

Final temperature (T2) = 70 °C

Change in temperature (ΔT) =?

Change in temperature (ΔT) = T2 – T1

Change in temperature (ΔT) = 70 – 10

Change in temperature (ΔT) = 60 °C

Finally, we shall determine the specific heat capacity of the substance as follow:

Heat (Q) absorbed = 2500 J

Mass (M) of substance = 100 g

Change in temperature (ΔT) = 60 °C

Specific heat capacity (C) =?

Q = MCΔT

2500 = 100 × C × 60

2500 = 6000 × C

Divide both side by 6000

C = 2500 / 6000

C = 0.417 J/gºC

Therefore, the specific heat capacity of substance is 0.417 J/gºC

Answer:

false

Explanation:

the excessive heat would cause the water to evaporate so it wouldn't remove the salt it would remove the water. what you would get would be an ocean bed with tons of salt at the bottom.

Answer:

7.208 g

Explanation:

0.4mol x [tex]\frac{2(1.01) + 16.00 g}{1 mol}[/tex]

= 7.208 g

You are using molar mass of H20 to find the mass. Moles of 0.4 and 1 mol cancel out leaving you with just grams. You get the values in the numerator from the periodic table and the 2(1.01) is because you have 2 of the H in H20

Answer:

26.35 mmHg

Explanation:

Given data:

Initial pressure = 65.0 mmHg

Initial temperature = 740 K

Final temperature = 300 K

Final pressure = ?

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

65 mmHg / 740 K = P₂/300 K

P₂ = 65 mmHg× 300 K  / 740 K

P₂ = 19500 mmHg. K /740 K

P₂ = 26.35 mmHg

Answer:

B.convection

Explanation:

Convection is the circular motion that happens when warmer air or liquid — which has faster-moving molecules, making it less dense — rises, while the cooler air or liquid drops down

Answer:

true im pretty sure

Explanation:

[tex]\huge\boxed{Option B}[/tex]

The periodic table, arranges the chemical elements ascording to their recurring properties. The number of each element corresponds to the number of protons in its nucleus.

There are 8 groups and 7 periods in the periodic table.

_________________________________________________________

Each element within a group has similar physical or chemical properties because of its atom's outermost electron shell. The outermost shell of every element in a specific group has same number of valence shell (most chemical properties are determined by the the outermost valence shell electron). The group number of an element represents the number of electrons in its outermost orbit. This shows that elements arranged in the same group have the same number of electrons in their outermost orbit.

Sodium and Potassium belong to the same group i.e. GROUP 1 which is also called S BLOCK Group or IONIC GROUP. They have the similar properties,

__________________________________________________________

Properties of S block Elements

1- They are soft metals

2- possess low melting and boiling points

3- They have the largest atomic radii in their corresponding periods

4- are good conductors of heat and electricity.

5- They have low values of ionization energies and are hence highly        electropositive.

Answer:

The sun is what makes the water cycle work. ... Heat causes liquid and frozen water to evaporate into water vapor gas, which rises high in the sky to form clouds... clouds that move over the globe and drop rain and snow. This process is a large part of the water cycle.

Explanation:

Answer it doesn't contribute

Explanation: it doesn't contribute

Answer:

Condensation

Explanation:

Answer:

78kJ

Explanation:

Energy change = Energy in (reactants) - Energy out (products)

According to this question, energy is released, meaning that the reaction is EXOTHERMIC. Hence, the energy change will be negative (-) i.e bond energy of reactants is greater than bond energy of products.

Energy in = bond energy of reactants = 43kJ

Energy out = bond energy of products = ?

Energy change of exothermic reaction = -35kJ

Therefore;

-35kJ = 43kJ - x

x = 35kJ + 43kJ

x = 78kJ

The bond energy of the products is 78kJ.

Answer:

When Sedimentary rocks are buried deep beneath the Earth's surface, great pressure and tremendous heat change these rocks into new rocks containing different minerals. These are Metamorphic rocks.

Explanation:

Answer: One change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules.

Explanation: I hoped that helped!