Need help with this question please.

Answer:

m-Ice = 23.85g

Explanation:

The heat absorbed for the cold water (Heat of the increase of water + Heat of ice melting) is equal to the heat released for the water at 75°C. The equation is:

m-Ice-*C*ΔT + Hf*-m-Ice = m-water*C*ΔT

Where m-Ice- is our incognite

C is specific heat of water = 4.18J/g°C

ΔT is change in temperature = 25.0°C - 0.0°C = 25.0°C

Hf is enthalpy of fusion of water = 333.6J/g

m-water = 50.0g

ΔT is change in temperature = 75.0°C - 25.0°C = 50.0°C

m-Ice-*4.18J/g°C*25°C + 333.6J/g*-m-Ice = 50.0g*4.18J/g°C*50.0°C

104.5 m-Ice- + 333.6 m-Ice- = 10450

438.1 m-Ice = 10450

Answer:

B. Neptune. Neptune is next to Uranus

Answer:

False. It is a PHYSICAL change.

Answer:

Two advantages are: Its cheap and it is a renewable energy source. Two disadvantages are it's not windy everyday and it will take up a lot of space for windmills.

Explanation:

Answer:

D and E

Explanation:

The other answers don't support steel, they support iron or are supporting both, and the question is why steel alloys are more often used

C supports both

B supports how iron's strength

A supports iron being easily shaped and bent

hope this helps

Answer:

3ppt is the relative error of the method

Explanation:

The relative error is a measurement used to determine the accuracy of your experiment, the equation to find the value in parts per thousand is:

Error = |True Value - Observed Value| / True Value * 1000

Where True value is 23.24%

And Observed value is 23.17%

Replacing:

Error = |23.24% - 23.17%| / 23.24% * 1000

Error =

Answer:

See Explanation

Explanation:

An ionic bond occurs due to electrostatic attraction between a positively charged ion and a negatively charged ion.

A metal and a ligand are bound by a coordinate covalent bond or a dative bond. This bond occurs due to donation of electron pairs from ligands to available orbitals on metals.

The formation of coordinate bonds is evident when neutral molecules or negative ions with non bonding electrons donate same to empty metal orbitals. This is sometimes shown by an arrow pointing from the ligands to the metal center.

For instance; tetraammine copper II ion is formed when four ammonia molecules donate a lone pair each to available vacant orbitals of the copper metal center to form [Cu(NH3)4]^2+.

Answer:

[tex]0.824\ \text{M}[/tex]

[tex]5.62\ \text{L}[/tex]

[tex]20.89\ \text{mol}[/tex]

Explanation:

Molar mass of NaCl = 58.44 g/mol

Mass of NaCl = 195 g

Volume of solution = 4.05 L

Molarity of solution is

[tex]\dfrac{195}{4.05}\times \dfrac{1}{58.44}=0.824\ \text{M}[/tex]

The molarity of the solution is [tex]0.824\ \text{M}[/tex]

Moles of NaCl = 4.63 mol

Volume is given by

[tex]\dfrac{4.63}{0.824}=5.62\ \text{L}[/tex]

The volume of the solution that contains the required amount NaCl is [tex]5.62\ \text{L}[/tex]

Volume of solution = [tex]25.35\ \text{L}[/tex]

Moles of solution is given by

[tex]0.824\times 25.35=20.89\ \text{mol}[/tex]

The number of moles of NaCl is [tex]20.89\ \text{mol}[/tex].

Answer: A) two substances combine to form a single new substance

Answer:Two substances combine to form a single new substance.

Explanation: just took it

Answer:

habitat/shelter

Explanation:

Answer:

Chemical decomposition

Explanation:

Chemical decomposition, analysis or breakdown is the separation of a single chemical compound into its two or more elements or to simple compounds.

Answer:

Other processes that break down chemical substances into simpler substances, include depolymerization, decomposition, etc

Hope it helps!!!

Explanation:

Answer:

releases, increase

Explanation:

The total energy of products in an Exothermic reaction is less compare to

total energy of the reactants. As a result of these the enthalpy becomes negative, then there is release of heat to the surroundings, which increase the energy of the immediate surroundings inform of heat. Hence the system release energy while the surroundings energy increase.

Answer:

d

Explanation:

Answer:

B. aq if the reaction is inorganic (double or single displacement), neutralization, etc.

Explanation:

Hello there!

In this case, unfortunately we are not given the undergoing chemical reaction; however, in the most of the double displacement, neutralization, precipitation and in general, inorganic reactions, the hydrochloric acid must be B. aq as it must be dissolved in water as the reaction media. On the other hand, in some organic reactions, it can be either aqueous or gaseous, the latter, specially as a product. For that reason, you will need to make sure whether your reaction is organic or inorganic to correctly figure out the phase label.

Best regards!

Answer:

The change of energy form one form to another result in chemical reaction!

Answer:

I definitely think he mostly observed that it was clear in color.

Explanation:

Answer:

fusion in the sun

Explanation:

I know this because I am currently talking this test and I know it cause I did it

Answer:Turning on a ceiling fan: electrical to mechanical

I took the test and Fusion in the sun: chemical to light and heat Lighting a match: sound energy into chemical energy were the wrong answers.

Helium, bromine, agron, neon,flourine

Answer:

3 FeSO4 + 2 Al(OH)3 -> 1 Al2(SO4)3 + 3 Fe(OH)2

Explanation:

Answer:

that ain't chemistry that's science

Answer:

2.178x10⁷kg, 2.178x10¹³mg, 2.178x10¹⁶μg, 2.178x10⁴ metric tons.

Explanation:

The units are kg, μg, mg and metric tons (1metric ton = 1000kg)

To solve this question we must convert, first, the grams to milligrams, and to kilograms. Then, the kilograms to metric tons and the milligrams to micrograms:

kg:

2.178x10¹⁰g * (1kg / 1000g) = 2.178x10⁷kg

mg:

2.178x10¹⁰g * (1000mg / 1g) = 2.178x10¹³mg

μg:

2.178x10¹³mg * (1000μg / 1mg) = 2.178x10¹⁶μg

metric tons:

2.178x10⁷kg * (1metric ton / 1000kg) = 2.178x10⁴ metric tons

Answer:

Explanation:

Since the pH has been given, the pOH can be found by using the formula

pH + pOH = 14

pOH = 14 - pH

From the question we have

pOH = 14 - 1.9

We have the final answer as

Hope this helps you

Answer:

12.10

Explanation:

Answer: Hello, There! your Answer is Below

Option A Salt

Explanation:

Salt is A Chemical Used For Varites of Purposes, So It's not Part of Matter.

Atom being the Smallest Part of  Molecule And ion Are Charge  Which is  Part of Matter.

Hope this helps!!

Have a great day!!!