Differentiate the three pictures and explain them briefly.

Answer:

A

Explanation:

15 sec   *   1 hr/3600 sec    (note how 'sec'  cancels out and you are left with 'hour' in your answer)   =    15/3600 hour

Answer:

answer d

Explanation:

Answer: When completely decomposed it will be -11 kJ

Answer:

431536.9mL

Explanation:

Answer:

c) James Chadwick discovered neutral particles in the nucleus

Explanation:

James Chadwick discovery of neutral particles in the nucleus best describes the further studies supported the work done by Ernest Rutherford. Hence, option (c) is the correct answer.

Answer: B) Ten moles of sodium hydroxide and five moles of hydrogen gas will be produced

Explanation: Got it right on USATestPrep

Answer:

Si 1.90

H 2.20

Explanation:good luck

Answer: 1.5×1024 molecules

Answer:

metallic is the correct one

Explanation:

Any metal such as iron are usually hard

Metallic type of solid is usually the hardest. Option D is correct.

A metal is a solid which is hard in nature shiny and smooth and produce sound when collide with each use to make ornaments, utensils or big machines etc. as there are different metals and hard too.

Some examples are gold, silver, copper, platinum, steel etc. they all are good conductor of electricity mostly copper is used to make wires and steel for making buildings etc. because of strong molecular force they are hard.

Therefore, Metallic type of solid is usually the hardest. Option D is correct.

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Answer:

voltage source

Explanation:

establishes an electric potential difference across the two ends of the external circuit and thus causes the charge to flow. The voltage source is the numerical value of this electric potential difference.

Answer:

Halocarbons.

Explanation:

Atmospheric measurements have clearly corroborated theoretical studies showing that chlorine and bromine released from halocarbons in the stratosphere react with and destroy ozone.

Answer:

~ 3.5 x 10^21

Explanation:

Mole weight of Ca Cl2   ( from periodic table ) = ~~ 111 gm

.645 gm / 111 gm / mole   X  6.022 x 10^23  =

[tex]34.0mm\ x\ \frac{cm}{10mm}\ x\ \frac{in}{2.54cm}[/tex]

put your equation so that your units cancel. The 'mm' will cancel with each other which will get you 'cm' and then the 'cm' will cancel with each other which will get you 'in'.

34.0 millimeters converted to inches would be 1.3385 inches.

A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.

Any additional quantity of that type can be stated as a multiple of the measurement unit.

Length is one of the most commonly used measurement parameters.

As given in the problem statement we have to convert Convert 34.0 mm to inches by using the dimensional analysis,

As we know that millimeters and inches, both are units of length,

1 millimeter = 0.0393701 inches

34.0 millimeter = 34.0× 0.0393701 inches

                         = 1.3385 inches

34.0 millimeters converted to inches would be 1.3385 inches.

Thus, 34.0 millimeters converted to inches would be 1.3385 inches.

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Answer:

B. There is a lower risk of runaway chain reactions.

Answer:

b

explanation:

Answer: 10.8 mol

Explanation:

The balanced equation in the image represents the reaction where aluminum chloride is formed from its elements.

From this equation, we know that for every 2 moles of aluminum consumed, 2 moles of aluminum chloride are produced (we can reduce this to conclude that moles of aluminum consumed = moles of aluminum chloride produced)

This means the answer is 10.8 mol.

Answer:

Science is all about learning and understanding something new. Inquiry means to ask for information or investigate something to find out more. So, scientific inquiry is using evidence from observations and investigations to create logical explanations and answer questions.

Answer:

a b c are correct and rest of other are incorrect

Answer:

.

Explanation:

.

Answer:

Think it's C16H31FN2O2, but I couldn't find anything else about it.

Explanation:

It's an organic chemistry skeletal structure and it's very difficult to explain how to read. Hopefully this gave you a push in the right direction, I know it wasn't the most complete answer.

Answer:

1) d. all of the above

2) a. cut from a barbed wire at a dairy farm

3) check 3, 4, 5

4) b. suburban areas

5) true

6) is true

7) d. "but..."

8) true

9) check 1, 2, 5

10) a. animal bites

11) c. smallpox

12. antibodies

Answer:

CaCO3

Explanation:

The molecule is formed by the calcium cation Ca+2 and the carbonate anion CO3−2.

Answer:

in this model is the correct organization of an atomic model of an element is C

A transformation of chemical energy to electrical energy occurs when there is a chemical reaction between metals and nonmetals.

The movement of electrons from one atom to another is what results in electrical energy.

A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit.

Hence, option C is correct.

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Let's balance

Moles of laughing gas

2 moles need 3 mol O_2

1 mol needs= 1.5mol O_2

moles of O_2.

#2

Moles Of O_2

Moles of smog

Mass

2N₂O + 3O₂ ⇒ 4NO₂

mol N₂O = 9 g : 44 g/mol = 0.205

mol O₂ = 3/2 x 0.205 = 0.3075

mass O₂ = 0.3075 x 32 g/mol = 9.84 g

=================================

mol O₂ = 7.5 g : 32 g/mol = 0.234

mol NO₂ (smog) = 4/3 x 0.234 = 0.312

mass NO₂ = 0.312 x 46 g/mol = 14.352 g

Answer:

A copper cup with a mass of 100.0 g contains 96.0 g of water. Both. the cup and the water are at 13.0OC. If 70.0 g of a substance at 84.0OC is added to the cup, the temperature increases to 20.0OC. If the specific heat capacities of copper and water are exactly 390 and 4180 respectively, find the specific heat capacity of the substance.

Explanation:

hope this helps

Answer: 4

Explanation: digestion is the process of breaking down food by mechanical and enzymatic action in the alimentary canal into substances that can be used by the body.

Answer:  

4.digestion is the process of breaking down food into smaller molecules

Explanation:

Answer:

the formula is N₂O

Explanation:

Answer:

A month

Explanation:

Answer:

NaBr is a reducing agent, Cl 2 is an oxidizing agent. ; Greenish-yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]

Explanation:hope its help