B. Hot water
The specific heat capacity of water is 4.186J/g °C
Calculate the temperature change when 8000 j of heat is added to 3g of water.
Use the equation q=mcAT
C. Specific heat capacity
Water has a specific heat capacity of 4.186J/g °C
Concrete has a specific heat capacity of 0.880 J/g °C
If a kg of water and a kg of concrete sit out in the sun on a hot day which one will have a change of temperature faster?

Explain why?

Answer:

A substance that cannot be broken down into chemically simpler components is an element.

Aluminum, which is used in soda cans, is an element.

Answer:

C. A model of a water molecule

Explanation:

H20, model shows 2 H,s (H2) and 1 O (O) which makes H2O. It's a model and not a real life picture of a molecule.

Answer:

Explanation:

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Answer:

Carbon is a chemical element, like hydrogen, oxygen, lead or any of the others in the periodic table. Carbon is a very abundant element. It exists in pure or nearly pure forms – such as diamonds and graphite – but can also combine with other elements to form molecules.

Answer:

4. C2H4, C3H6, C4H8

this is the alkane homologous series of hydrocarbons.

Their general formula is CnH2n

you can check this fits for all these compounds

put n = 1, 2, 3 and so on

Answer:yes they do represent

Answer:

Physical Change

There is no chemical reaction taking place, nor is anything "changing" per se. While yes, hand washing eliminates bacteria, the action in itself is a physical change as nothing is being directly changed and the removal of harmful bacteria is merely a product of the soap.

Answer:

I personally think it would be all of the above

Answer: They are both non polar molecules compounds although water is a polar molecule compound. There are no significant attractions.

Answer:

the equation is not correctly written but the answer is option D

The balanced equation among the given options is D, where each of the  elements are equal in number on both side.

A balanced chemical equation for a reaction represents perfect stoichiometric ratios of each reactants and products. Each elements  have to be equal in number on both sides.

The number of elements or groups can be balanced each side  by multiplying with suitable integers. The chemical equation in D is balanced where, Al, Cl and Mg are balanced on both side.

The equation in A, is not balanced where, number of Na and Br are not balanced. In equation B Cl is two  in reactant side and one in product side. Thus, not balanced. Similarly in option C, oxygen and calcium are not balanced. Therefore, option D is correct.

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Answer:

0.853 M

General Formulas and Concepts:

Acid-Base Titrations

Explanation:

Step 1: Define

Identify variables

[Given] 6.48 L

[Given] 5.53 mol

Step 2: Solve for Molarity

Step 3: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.853395 M ≈ 0.853 M

Answer:

The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.

Answer:

the answer is the D, it has a full octet

Answer:

When an amine is added to a solution of a strong acid, such as hydrochloric acid, the amine nitrogen atom is protonated to produce an ammonium salt. Ammonium salts of low molecular weight are soluble in water if the hydrocarbon portion of the amine is small.Ammonium cation is found in a variety of salts such as ammonium carbonate, ammonium chloride and ammonium nitrate. Most simple ammonium salts are very soluble in water. An exception is ammonium hexachloroplatinate, the formation of which was once used as a test for ammonium.

The reactants are A: Carbon Dioxide and water

Answer:

3 and 6 (weight change and nothing changes)

Explanation:

Hi there!

A chemical change is a change when matter changes into a new substance and has a new chemical property.

The signs that a chemical change is taking place are:

1. change in color

2. change in smell

3. change in energy (for example, there is a change in temperature (thermal energy))

4. a gas is formed (fizzing/bubbling/foaming are signs of this!)

5. formation of a solid (a precipitate)

A physical change is any change to the size, shape, or state of a substance. The substance still has the same chemical property.

these are your eight options:

1. tarnished is formed (a sign of a chemical change; a change in color)

2. gas is produced (a sign of a chemical change)

3. weight change (NOT a sign of a chemical change. Even though the weight changed, the substance still has the same chemical composition and therefore, there wasn't any change to its chemical identity)

4. Temperature change (a sign of a chemical change; a change in energy)

5. color change (a sign of a chemical change)

6. nothing changes (NOT a sign of a chemical change. If nothing happens, the substance is still the same as it was originally and there was no change to its chemical identity.)

7. forms a precipitate (a sign of a chemical change)

8. energy is released (a sign of a chemical change)

therefore the two options that are NOT a sign of a chemical change are 3 and 6 (weight change and nothing changes)

Hope this helps! :)

Answer:

See Explanation

Explanation:

1) Let us recall that;

Mass number = number of protons + number of neutrons

Where;

Number of protons = ?

Number of neutrons =20

Mass number =39

Number of protons = mass number - number of neutrons

Mass of protons =39 - 20= 19 protons

2) Atomic number = 13

Number of neutrons =14

Then the mass number =13 +14 =27

The symbol of the element is 27X13

The number of protons= the number of electrons =13

The atomic number is the same as the proton number =13

Answer:

Lead may disrupt the functioning of mitochondria in the developing brain. Because the mitochondria are important for energy production within a neuron, a change in their function may damage the cell. Lead may also affect brain function by interfering with neurotransmitter release and synapse formation.

Answer:

The correct answer is - 1/4 0f 6 gram or 1.5 gram to be exact.

Explanation:

Given:

Half-life of sulfate-12 = 18 years

number of half-lives - 2

initial amount - 6 grams.

Solution:

The Half-life of an element or substance is the required time to decay the half amount of the initial amount of the element.

Remaining amount = initial amount * (1/2)^n

here n = number of half lives

then,

Remaining amount = 6* (1/2)^2

= 6/4

= 1.5 g.

Thus, the correct answer is = 1.5 g or 1/4 of 6 gram.

Answer:

C6H12O6+6O2=6Co2+6H2o

The balanced chemical equation for the reaction of glucose (C₆H₁₂O₆) with oxygen gas to produce carbon dioxide gas and water vapor is C₆H₁₂O₆  + 6O₂ → 6CO₂ + 6H₂O

The balanced chemical equation is the equation in which the number of atoms on the left hand side that is reactant side is equal to the number of atoms on the right hand side that is product side in an equation.

The balanced chemical equation is:

C₆H₁₂O₆  + 6O₂ → 6CO₂ + 6H₂O

Thus, from the above conclusion we can say that The balanced chemical equation for the reaction of glucose (C₆H₁₂O₆) with oxygen gas to produce carbon dioxide gas and water vapor is C₆H₁₂O₆  + 6O₂ → 6CO₂ + 6H₂O

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Answer:

A continent is a large distinct landmass.

There are seven continents on Earth.

Continents cover two-thirds of Earth’s surface.

Explanation:

The organism in the bethic zone can survive in such high pressure area. This is because the organism there have no air pockets that provides them the ability to be balanced in the water

Answer:

C. oxygen

Explanation:

oxygen cannot for a polar covalent bond with another oxygen atom

Answer:

oxygen

Explanation:

Answer:

H=MC∆T

Heat = Heat absorbed or given off

M=Mass

C=Specific Heat Capacity of substance (Water in thus case). It has a Specific Heat capacity of 4200J/kg.k

∆T= Temp Change (T2-T1)

I'll solve with My Heat in Joules.

The heat is given in Calorie

1Cal = 4.186J

2500cal = 10,465J.

∆T= H/MC

=10465/0.15(4200)

=16.6°C

∆T=16.6

T2 - T1 = 16.6

T2 = 16.6+T1

T2 = 16.6 + 23

T2 = 39.6

Approx. 40°C

Answer:

A.

Explanation:

Warmer temperatures can also lead to a chain reaction of other changes around the world. That's because increasing air temperature also affects the oceans, weather patterns, snow and ice, and plants and animals. The warmer it gets, the more severe the impacts on people and the environment will be.

Answer:

2nd option

Explanation:

it means that there are 8 carbons

The prefix oct- mean that there are 8 carbon atoms. Therefore, option (B) is correct.

The 1st step for the IUPAC nomenclature of a compound is to select the longest, most substituted carbon chain with a functional group. Then the use of the primary suffix indicates the degree of unsaturation such as 'ane' or 'ene.

Then the identification of the secondary suffix indicates the number of functional groups in the molecule and the number of times of the same functional group such as di, tri, tetra, etc.

The prefix can be used to indicate the side chains, substituents, and low-priority functional groups. The prefix Oct- is used if there are eight carbon atoms in the chain. The prefix 'ane' is used for single bonds and the prefix 'ene' is used for the double bonds in the carbon chain.

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Answer:

beta

Explanation: