Describe the properties of the transuranium elements.

HNO3+Ca(OH)2= Ca(NO3)2+H2O.Answer:

Explanation:hope this helps <3

Answer:

15L will be the final volume

STEPS:

.50 + .25 = .75

.25/5 ÷ .75/x

(.75*5=3.25)

.25x = 3.25

x=15

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Answer:    Answer:

21.03L

Explanation:

V1 = 456mL = 0.456L

T1 = 23°C = (23 + 273.15)K = 296.15K

P1 = 50atm

V2 = ?

T2 = 273.15K

P2 = 1.0atm

Note : P2 and T2 are at STP which are 1.0atm and 273.15K

To find V2, we have to use the combined gas equation,

(P1 × V1) / T1 = (P2 × V2) / T2

P1 × V1 × T2 = P2 × V2 × T1

V2 = (P1 × V1 × T2) / (P2 × T1)

V2 = (50 × 0.456 × 273.15) / (1.0 × 296.15)

V2 = 6227.82 / 296.15

V2 = 21.029L

Final volume of the gas is 21.03L

Explanation:

Taking into account the definition of calorimetry, the heat change that would take place as 25.7 g of liquid Ethyl alcohol are cooled from 55.2 °C to 30 °C is -1554.336 J.

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

So, the equation that allows to calculate heat exchanges is:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing in the expression to calculate heat exchanges:

Q= 2.40 [tex]\frac{J}{gC}[/tex]× 25.7 g× (30 °C - 55.2 °C)

Solving:

Q= -1554.336 J

Finally, the heat change that would take place as 25.7 g of liquid Ethyl alcohol are cooled from 55.2 °C to 30 °C is -1554.336 J.

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Answer:

a. Ocean currents influence many marine climates.

c. The North Atlantic Drift gives Ireland a warm climate for its latitude.

a & c

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Answer: A

Explanation:

A food web is just a bigger picture idea and more complex version of a food chain.

Answer:

a. many food chains linked together

Explanation:

A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem.

Answer:

30 miles

Explanation:

Just add the numbers.

Answer:

0.025 L KOH

Explanation:

Because you gave molarity and moles, I am assuming that you are looking for volume via the molarity equation. I simply plugged the given values into the molarity equation and rearranged to isolate the liters variable.

Molarity (M): 0.1 M

Moles: 0.0025 moles

Volume (L): ? L

Molarity (M) = moles / liters (L)

0.1 M KOH = (0.0025 moles KOH) / (? L KOH)

(0.1 M KOH) x (? L KOH) = 0.0025 moles KOH

? L KOH = (0.0025 moles KOH) / (0.1 M KOH)

? L KOH = 0.025 L KOH

Answer:

[tex]2\; {\rm Li} + 2\; {\rm H_{2} O} \to 2\; {\rm LiOH} + 1\; {\rm H_{2}}[/tex].

Explanation:

Assume that the coefficient of [tex]{\rm LiOH}[/tex] is [tex]1[/tex]:

[tex]?\; {\rm Li} + ?\; {\rm H_{2} O} \to 1\; {\rm LiOH} + ?\; {\rm H_{2}}[/tex].

The product side of this equation would include:

By the conservation of atoms, the reactant side of this equation should also include:

The only reactant that includes [tex]{\rm Li}[/tex] atoms is [tex]{\rm Li}\![/tex]. Thus, the coefficient of the reactant [tex]\!{\rm Li}[/tex] should be [tex]1[/tex] to ensure that the reactant side of this equation includes exactly [tex]1\![/tex] [tex]{\rm Li}\!\![/tex] atom.

Likewise, the only reactant that includes [tex]{\rm O}[/tex] atoms is [tex]{\rm H_{2}O}[/tex], with one [tex]{\rm O}\![/tex] atom in each formula unit of [tex]{\rm H_{2}O}\![/tex]. There needs to be [tex]1\![/tex] [tex]\!{\rm O}[/tex] atom on the reactant side of this equation. Therefore, the coefficient of the reactant [tex]{\rm H_{2}O}\!\![/tex] should also be [tex]1[/tex]:

[tex]1\; {\rm Li} + 1\; {\rm H_{2} O} \to 1\; {\rm LiOH} + ?\; {\rm H_{2}}[/tex].

The reactant side of this equation now include:

By the conservation of atoms, the product side of this equation should also include:

The product [tex]1\; {\rm LiOH}[/tex] alone would account for [tex]1\; {\rm Li}[/tex] atom, [tex]1\; {\rm O}[/tex] atom, and [tex]1\; {\rm H}[/tex] atom. Thus, there would be only [tex]1[/tex] more [tex]{\rm H}[/tex] atom for the other product, [tex]{\rm H_{2}}[/tex]. However, since there are [tex]2[/tex] [tex]{\rm H}\![/tex] atoms in every formula unit of [tex]{\rm H_{2}}\![/tex], the coefficient of [tex]\!{\rm H_{2}}[/tex] would need to be [tex](1/2)[/tex]:

[tex]1\; {\rm Li} + 1\; {\rm H_{2} O} \to 1\; {\rm LiOH} + (1/2)\; {\rm H_{2}}[/tex].

Atoms of each element are indeed conserved in this equation.

Eliminate the fractions by multiplying all coefficients by [tex]2[/tex] (least common denominator of all coefficients in this equation):

[tex]2\; {\rm Li} + 2\; {\rm H_{2} O} \to 2\; {\rm LiOH} + 1\; {\rm H_{2}}[/tex].

The number of moles of nitrate dissolved in water if 6.15 mole of strontium nitrate is :   12.3 moles

Given data :

Moles of strontium nitrate = 6.15 moles

When strontium nitrate ( [tex]Sr(NO_{3} )_{2}[/tex] ) is placed in water it will dissociates into its ions because strontium nitrate is an ionic compound.

Next step : Represent the ionization of strontium nitrate

[tex]Sr ( NO_{3} )_{2} (aq) --- > Sr^{2+} (aq) + 2NO_{3} ^{-} (aq)[/tex]

From the Stoichiometry of the chemical reaction

I mole of strontium nitrate =  2 moles of Nitrate ions

6.15 mole of strontium nitrate = 2 * 6.15

                                                 = 12.3 moles of Nitrate

Hence we can conclude that The number of moles of nitrate dissolved in water if 6.15 mole of strontium nitrate is :   12.3 moles.

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Answer:

.... is called acidic solution

Answer:

It is called acidic solution

Answer:

Deposition

Explanation:

Deposition: The gaseous substance turns directly into a solid without undergoing the liquid phase

Answer:

Preheat oven to 425°F.

Pour one can of sweetened condensed milk into a casserole dish or pie plate. Cover with foil.

Place in a larger pan and fill to ¾" with water. ( Fill water as needed while baking)

Bake 60-90 minutes or until condensed milk has reached a golden brown color.

Cool completely.

Explanation:

hope this helps :D

Answer:

yes

Explanation:

math is used constantly to improve one's performance. Achieving the objective of shooting a basketball includes using percentages and angles. By finding the most consistent percentage of shots made while using a certain angle, you can find out which player will score the most baskets.

Answer: Ernest Z. The concentration would be 0.76 mol/L.

Liquid. It's volume stays the same but liquid changes shape based on what it's contained in

Answer:

I think that this would be an example of erosion

Answer:

Iodine has an atomic number of 53 meaning 53 electrons and it gain 1 electron when reacting with a metal. We know the element is a non metal as is gains an electron

Ion is fluoride (F⁻), gaining 1 electron for a stable electron structure like noble gas neon (Ne).

Fluorine (F) is an element with 9 electrons in its neutral state. By gaining 1 electron, it forms the fluoride ion (F⁻) with 10 electrons. This allows the ion to achieve a stable electron configuration, following the octet rule.

Fluoride ions are highly reactive due to their electron configuration and tend to form ionic compounds. They play essential roles in various chemical and biological processes, such as dental health, where fluoride compounds are added to prevent tooth decay.

Fluoride ions' stability and reactivity make them important in various industrial and scientific applications, including the production of fluorine-containing compounds used in refrigerants, plastics, and pharmaceuticals.

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Answer:

carbon

Explanation:

because it is part of many different molecules

Answer:

Salt

Explanation:

Substances can be classified into elements, compounds or mixtures in chemistry.

Elements are simple substances which cannot be broken down any further. Elements can be found in the periodic table of elements.

On the other hand, compounds and mixtures are made up of two or more elements.

When the atoms of different elements are chemically combined, they are known as compounds. The different components of a mixture can be separated by physical means, such as filtration.

For example, sodium and chlorine are elements. When chemically combined, the compound is known as sodium chloride. An example of a mixture would be sand in water.

Gold, nitrogen and carbon are elements which can be found in the periodic table as Au, N, and C respectively. Whether the element is shiny, found in the atmosphere or found in different molecules does not change the fact that they are only made of one type of atom and are thus elements.

Salt is indeed made up of two types of elements, and they are chemically combined. Table salt is known as sodium chloride (NaCl) and the 2 elements are sodium and chlorine.

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Answer:

2KClO3(s) = 2KCl(s) + 3O2(g)

Explanation:

2KClO3(s) = PRODUCT

2KCl(s) + 3O2(g)=REACTENT

Answer: 100, less

Explanation:

From the calculation as shpwn in the procedure below, the equilibrium constant of the substance is 6.9 * 10^-15.

The equilibrium constant for the solubility of aa solid in solution is called the solubility product Ksp. The Ksp shows the extent to which a solid is dissolved in solution.

Given that;

Fe(OH)2 ⇄Fe^2+ + 2(OH)^-

Ksp = s(2s)^2

We have s as 1.2 x 10^-5 M

So

Ksp = 4s^3

Ksp = 4( 1.2 x 10^-5 )^3

Ksp = 6.9 * 10^-15

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Answer:

d

Explanation:

Alfred Wegener was the one who proposed the idea although he wasn't believed until after he died

The scientist who presented the theory of Continental Drift is Alfred Wegener. The correct option is D.

The continental drift idea provided an explanation for why the continents had moved from their original places. Once linked as a single entity, called a "Subcontinent."

Since continental rocks are too light to sink to the ocean floor, the common belief that mountains were to blame for their sinking was later disproved.

Alfred Lothar Wegener is a climatologist. He discovered the continental drift theory. The science of plate tectonics has now supplanted the theory of continental drift. The scientist Alfred Wegener is most closely identified with the hypothesis of continental drift. He referred to it as continental drift.

Therefore, the correct option is D. Alfred Wegener.

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Answer:

I thank it is because of the cold It doesn't really taste sweet because the temperature is lower hence the sugar does not dissolve properly.

Dissolution of a solute

Answer:

Explanation:

Methanes boiling point would be higher than water's

Water is a liquid because particles are held close to one another by hydrogen bonds, whereas methane is a gas because the weak IMF lets particles to spread out.

Hydrocarbon methane ( CH4 ) is a main constituent of natural gas. Because methane is a greenhouse gas (GHG), its presence in the atmosphere has an impact on the planet's climate and temperature.

A range of anthropogenic (influenced by humans) and natural sources release methane into the atmosphere.

The significant difference in polarity between oxygen and hydrogen causes the water molecules to be dipolar. As a result, a strong hydrogen bond forms between the H and O of nearby water molecules, packing the water molecules so closely together that water is a liquid at ambient temperature.

Thus, water is a liquid because particles are held close to one another by hydrogen bonds, whereas methane is a gas because the weak IMF lets particles to spread out.

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Answer:

153 g CO₂

Explanation:

To begin, the reaction is not in its simplest form. The coefficients can be divided by two. However, this will not change the answer.

CH₄ + 2 O₂ --> CO₂ + 2 H₂O

You can find the grams of CO₂ by taking the moles of O₂, using the mole to mole ratio of O₂ to CO₂ (via the coefficients), then converting moles of CO₂ to grams. You will need the molar mass of CO₂ since you want to convert it from moles to grams. This is calculated using the values on the periodic table. The ratios should be written in a manner that allows for the cancellation of units. The answer should have 3 sig figs.

12.011 g/mol + 2(15.998 g/mol) = 44.007 g/mol CO₂

6.95 moles O₂          1 mol CO₂           44.007 g CO₂
----------------------  x  -------------------  x  -------------------------  = 153 g CO₂

                                  2 mol O₂             1 mol CO₂

Answer:

c-)O2

Explanation:

Answer:

Acid + Base ------> Salt + Water

Example:

HCl + NaOH ------> H2O + NaCl

Answer:

C. Chloroform and alcoholic KOH

Explanation:

Secondary and tertiary amines do not react with CHCl3 and alc. KOH generates isocyanide, whereas primary amine does.