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Which two materials form igneous rocks upon cooling?
A. lava and crystals
B. magma and lava
C.crystals and intrusive rocks
D.intrusive rocks and sediment from rocks​

Answers

Answer 1

Answer:

B. Magma and Lava

hopefully this helped :3

Answer 2

Answer:

B: magma and lava

Explanation:


Related Questions

is a process that involves the collection of information and ideas supported by evidence.
Science
Systematics
Pseudoscience
Hypothesis

Answers

Answer:

pseudoscience

Explanation:

srry that this is so late btw, hope this helps...

Answer:

Science

Explanation:

First response is NOT correct

What is Kb for CH3NH2(aq) + H2O(1) CH3NH3(aq) + OH (aq)?

Answers

Answer:

Option B.

Kb = [CH3NH3+] [OH-] / [CH3NH2]

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

CH3NH2(aq) + H2O(l) <=> CH3NH3+(aq) + OH- (aq)?

The expression for the equilibrium constant, Kb is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.

Thus, the expression for the equilibrium constant, Kb fo th above reaction can be written as follow:

Kb = [CH3NH3+] [OH-] / [CH3NH2]

Option B gives the correct expression for Kb.

Answer:b

Explanation:AP EX

Name one way chemicals can help the environment

Answers

Energy storage and transport. Chemical energy transport.

Answer:

to clean the water

Explanation:

How does an enzyme’s active site relate to its substrate?

Answers

Answer:

The enzyme's active site must be the mold shape of the substrate.

Explanation:

An enzyme and a substrate bind together in order to work. If the shapes of the 2 are different, they will not be able to bond together. If the shapes of the 2 fit glove-in-hand, then they will be able to bond together.

what’s the answer ?????

Answers

option A is the correct one

It represents Mp orBp of a substance at a specific pressure

Determine the net iconic equation for the following chemical reaction: HCl(aq) + NH4OH(aq)———-> NH4Cl(aq) + H2O(I) Hint: HCl(aq) is strong acid NH4OH(aq) is a weak base

Answers

Answer : The net ionic equation will be,

[tex]H^{+}(aq)+OH^{-}(aq)\rightarrow H_2O(l)[/tex]

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The given balanced ionic equation will be,

[tex]HCl(aq)+NH_4OH(aq)\rightarrow NH_4Cl(aq)+H_2O(l)[/tex]

The ionic equation in separated aqueous solution will be,

[tex]H^+(aq)+Cl^-(aq)+NH_4^+(aq)+OH^-(aq)\rightarrow H_2O(l)+NH_4^+(aq)+Cl^-(aq)[/tex]

In this equation, [tex]NH_4^+\text{ and }Cl^-[/tex] are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

[tex]H^{+}(aq)+OH^{-}(aq)\rightarrow H_2O(l)[/tex]

How to calculate this ?
Do you use the molar mass and multiply it by the mass given ?

Answers

Answer:

Option C. 8.91g

Explanation:

The balanced equation for the reaction is given below:

2Pb(NO3)2 —> 2PbO + 4NO2 + O2

Next, we shall determine the mass of Pb(NO3)2 that decomposed and the mass PbO produced from the balanced equation.

This is illustrated below below:

Molar mass of Pb(NO3)2 = 207 + 2[14 + (16x3)]

= 207 + 2[14 + 48]

= 207 + 2[62] = 207 + 124

= 331g/mol

Mass of Pb(NO3)2 from the balanced equation = 2 x 331 = 662g

Molar mass of PbO = 207 + 16 = 223g/mol

Mass of PbO from the balanced equation = 2 x 223 = 446g

Summary:

From the balanced equation above,

662g of Pb(NO3)2 decomposed to produce 446g of PbO.

Finally, we can obtain the maximum mass of lead(II) oxide, PbO produced from 13.23g of lead (II) nitrate, Pb(NO3)2 as follow:

From the balanced equation above,

662g of Pb(NO3)2 decomposed to produce 446g of PbO.

Therefore, 13.23g of Pb(NO3)2 will decompose to produce = (13.23 x 446)/662 = 8.91g of PbO.

Therefore, 8.91g of PbO were obtained from the decomposition of 13.23g of Pb(NO3)2

How do you find the amount of electrons for any element?

Answers

Answer:

If you know the number of protons and neutrons you have to simply subtract the number of neutrons by number of protons the answer will be number of neutron

Explanation:

Answer:

We can find the amount of electrons through its Atomic number and with the help of electronic configuration

Need help ASAP!!!! what is the value (angle) for the C=C=O bond in Ketene i.e. CH2=C=O

Answers

Answer:

[tex]180^\circ[/tex] by the VSEPR theory.

Explanation:

This question is asking for the bond angle of the [tex]\rm C=C=O[/tex] bond in [tex]\rm H_2C=C=O[/tex]. The VSEPR (valence shell electron pair repulsion) theory could help. Start by considering: how many electron domains are there on the carbon atom between these two bond?

Note that "electron domains" refer to covalent bonds and lone pairs collectively.

Each nonbonding pair (lone pair) of valence electrons counts as one electron domain.Each covalent bond (single bond, double bond, or triple bond) counts as exactly one electron domain.

For example, in [tex]\rm H_2C=C=O[/tex], the carbon atom at the center of that [tex]\rm C=C=O[/tex] bond has two electron domains:

This carbon atom has two double bonds: one [tex]\rm C=C[/tex] bond and one [tex]\rm C=O[/tex] bond. Even though these are both double bonds, in VSEPR theory, each of them count only as one electron domain. Keep in mind that there are only four valence electrons in each carbon atom. It can be shown that all four valence electrons of this carbon atom are involved in bonding (two in each of the two double bonds.) Hence, there would be no nonbonding pair around this atom.

In VSEPR theory, electron domains around an atom repel each other. As a result, they would spread out (in three dimensions) as far away from each other as possible. When there are only two electron domains around an atom, the two electron domains would form a straight line- with one domain on each side of the central atom. (To visualize, consider the three atoms in this [tex]\rm C=C=O[/tex] bond as three spheres on a stick. The central [tex]\rm C[/tex] atom would be between the other [tex]\rm C[/tex] atom and the [tex]\rm O[/tex] atom.)

This linear geometry corresponds to a bond angle of [tex]180^\circ[/tex].

Which of the following is a characteristic property of the halogen? A. They are very reactive B. They are very stable C. They are metals D. They are all gases

Answers

Answer:A

Explanation:

They are very reactive is a characteristic property of halogen.

Hence, Option (A) is correct answer.

What is Halogen ?

Halogens are non metallic elements in periodic table. It belongs to group 17 in the periodic table. Halogen family consists six elements that is Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astatine (At) and Tennessine (Ts).

What are the characteristics property of halogen ?They are nonmetals. Halogens have 7 valence electrons. They are highly reactive with alkaline earth metal and alkali metals. Halogens are not stable.

Thus, from the above conclusion we can say that They are very reactive is a characteristic property of halogen.

Hence, Option (A) is correct answer.

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someone help PLSSSS. i’ve asked this question like 3 times already Determine the number of lone pair electrons on each H in NH3. Z of N= 7, H=1 A. 0 B. 3 C. 1 D. 2

Answers

Answer:

The answer is option B.

3.

Hope this helps you

what's love like? what feels are involved?

Answers

You would go out of your way for that person and let them go if they didn’t wanna stay.

How do mass and type of material affect thermal energy transfer?

Answers

Answer:

Temperature, mass, and the type of material are factors that affect the thermal energy of an object.

Material with the higher specific heat will have more thermal energy than material with lower specific heat if they both have the same mass and temperature.

The thermal energy within the thing increases if the temperature remains constant but the object's mass rises.

If two materials have the same mass and temperature, the material with the greater specific heat will have more thermal energy than the material with the lower specific heat.

How does thermal energy transfer depend on the kind of material?

The speed at which thermal energy moves from one end of a substance to another determines thermal conductivity. Insulators transport thermal energy slowly while conductors transfer thermal energy quickly.

The thermal energy within the thing increases if the temperature remains constant but the object's mass rises.

Conduction, convection, or radiation are all ways that thermal energy can be moved from one location to another.

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What is the activation energy for the reaction in this energy diagram?

Answers

Answer:

+ 100 Kj

Explanation:

The very minimum energy required to activate atoms or molecules to undergo chemical transformation.

Answer:

It is 60kj.

Explanation:

It is the highest point minus where a+b is at, so it is 60kj.

I need a help from this question!!

Answers

Answer:

B

Explanation:

Please take a look at the picture attached for the drawings and structures.

C2H4 is a alkene (C-C double bond). When steam (water) is added, it turns into an alcohol, where the double bond breaks and a (-OH) functional group is attached to one of the Carbons. In this case, C2H4 ethene is turned into ethanol.

When an alcohol undergoes oxidation, primary alcohols turn into aldehyde (-CHO) or carboxylic acids (-COOH). Secondary alcohol turns into ketone. Ethanol is a primary alcohol. And since it later reacts with propanol, it can only form carboxylic acid when it oxidizes. The product in this reaction is ethanoic acid.

Carboxylic acid reacts with alcohol to form an ester (-COO-). the -COOH group from acid combines with the -OH group from alcohol to form an ester bond -COO- while eliminating H2O. Therefore, when propanol undergoes esterification with ethanoic acid, propyl ethanoate is produced. It is the answer of B.

The proof that ch4 is a weak acid

Answers

Answer: because ch4 is not considered a acid they said it is too weak

Explanation:

ch4 isnt even an acid

Modern atomic theory states that atoms are neutral. How is this neutrality achieved? (3 points) Select one: a. Equal number of neutrons and protons b. Equal number of protons and electrons c. More electrons than protons d. More neutrons than electrons

Answers

Answer:

The answer is option B.

Equal number of protons and electrons

Hope this helps you

Answer:

equal number of electrons and protons

Explanation:

electron is negatively charged and proton is positively charged for an atom to stay neutrality # of electrons and protons must be equal.

PLZ HELP SUPER STUCK T^T *will give brainiest* (30 points) (plz hurry!! its on a test)
Question: Aluminum is an element. Which best describes what makes up a sample of aluminum? one kind of atom two different kinds of atoms all carbon-based atoms a carbon atom and non-carbon atoms

Answers

Answer:

The answer to this is A. One kind of atom

Explanation:

The other options make no sense whatsoever. But enjoy.

I hope this helped.

Answer:

A. One kind of atom

Explanation:

Which refers specifically to a heated solution that holds more dissolved solution than it can hold at a lower temperature? supersaturated undersaturated heterogeneous homogeneous

Answers

Answer:

A. Supersaturated

Explanation:

i got it right on edge 2021

The heated solution that holds more dissolved solution than it can hold at a lower temperature is supersaturated solution. Therefore, option A is correct.

What is supersaturated solution ?

A solution that contains more solvent than the typical amount that can dissolve at a specific temperature is said to be supersaturated. By introducing a tiny solute crystal known as a seed crystal, the excess dissolved solvent in a super-saturated solution can begin to recrystallize.

A solution that contains more solvent than the typical amount that can dissolve at a specific temperature is said to be supersaturated. A solution is considered supersaturated if it contains more solute than is necessary to saturate it.

A solution that contains more solute than it can hold at a specific temperature is said to be supersaturated. Usually, raising a solution's temperature causes more particles to dissolve, increasing the solute concentration.

Thus, option A is correct.

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When a sample of Mg is combusted in a bomb calorimeter, 25.4 kJ of energy as heat is evolved. The calorimeter contains 7.50 x 102 g of water at an initial temperature of 18.6 °C. The specific heat capacity of water is 4.184 J/gLaTeX: \cdot⋅°C and the heat capacity of the bomb is 8.20 x 102 J/°C. Calculate the final temperature of the water and the bomb

Answers

Answer:

x = 25.02 or 25°c

Explanation:

Given:

mass of water : 7.50×10² =750 gm

Ccal = 8.20× 10² = 820 J/°c

Let assume final temp = x°c

then, heat gained by the water + heat gained by calorimeter

= 25400 J

⇒ Mw × Cw× ΔTw+ Ccal ×ΔT = 25400

⇒ 750× 4.184 × (x - 18.6) + 820 ×(x-18.6) = 25400

x = 25.02 or 25°c

Which will change will cause the gravitational force between a baseball and a soccerball

Answers

Baseball has more chances




Pls mark as brainliest

How much energy does a 185 nm wave of light have? (The speed of light in a
vacuum is 3.00 x 108 m/s, and Planck's constant is 6.626 x 10-34 Jos.)
A. 1.07 x 10-18 J
B. 8.38 x 1034j
C. 9.31 x 1017 J
D. 3.68 x 10-32 J
O

Answers

Answer:  A.  1.07 x 10∧ -18 J

Explanation:

The energy can be calculated by using this relation; E = hc / ∧

Where E = energy

            h = Planck's constant = 6.626 x 10-34joules

            c  = speed of light =  3.00 x 10∧8 m/s

            ∧  = wavelenght  = 185 nm = 185 x 10∧ -9m

Therefore;  E=  hc / ∧

                     =  (6.626 x 10-34 j/s)  x  ( 3.00 x 10∧8 m/s)  /  185 x 10∧ -9m

                     =    1.987 x 10 ∧ -25 / 185 x 10∧ -9m

                     =  1.07 x 10∧ -18 J

4.Acrylic fibres are also known as
a)Terry cot
b)Orlon
c)Polyester
d)None of these

Answers

Answer:

B

Explanation:

DuPont created the first acrylic fibers in 1941 and trademarked them under the name Orlon.

(PLEASE HELP, LAST QUESTION I NEED! ) Describe to me the purpose of stoichiometry calculations.

Answers

Explanation:

Stoichiometry measures these quantitative relationships, and is used to determine the amount of products and reactants that are produced or needed in a given reaction. Describing the quantitative relationships among substances as they participate in chemical reactions is known as reaction stoichiometry.

When 12 g of methanol (CH3OH) was treated with excess oxidizing agent (MnO4-), 14 g of formic acid (HCOOH) was obtained. Using the following chemical equation, calculate the percent yield. (The reaction is much more complex than this; please ignore the fact that the charges do not balance.)
3CH3OH + 4MnO4- ----> 3HCOOH + 4MnO2
(a) 100%
(b) 92%
(c) 82%
(d) 70%
(e) 55%

Answers

Answer:

(c) 82%

Explanation:

Using the chemical reaction:

3CH₃OH + 4MnO₄⁻ → 3HCOOH + 4MnO₂ + 4e⁻

3 moles of methanol produce 3 moles of formic acid (Reaction 1:1)

To find the percent yield we need to calculate theoretical yield of the reaction when 12g of methanol (Molar mass: 32.04g/mol) are reacting, thus:

12g ₓ (1mol / 32.04g) = 0.3745 moles of methanol are in 12g.

As 1 mole of methanol produce 1 mole of formic acid, assuming a 100% of yield in the reaction (Theoretical yield) moles produced of formic acid are 0.3745 moles.

Using molar mass of formic acid (46.03g/mol), mass of the acid in 0.3745moles are:

0.3745 moles ₓ (46.03g/mol) = 17.2g of formic acid are theoretical yield

Percent yield is calculated as:

(actual yield / Theoretical yield) × 100

As actual yield of the reaction is 14g. Theoretical yield is:

(14g / 17.2g) × 100 = 81.2% ≈ 82%

Right answer is:

(c) 82%

The percentage yield of the reaction is 82%

The correct answer to the question is Option C. 82%

We'll begin by writing the balanced equation for the reaction.

3CH₃OH + 4MnO₄⁻ → 3HCOOH + 4MnO₂ + 4e⁻

Molar mass of CH₃OH = 12 + (3×1) + 16 + 1 = 32 g/mol

Mass of CH₃OH from the balanced equation = 3 × 32 = 96 g

Molar mass of HCOOH = 1 + 12 + 16 + 16 + 1 = 46 g/mol

Mass of HCOOH from the balanced equation = 3 × 46 = 138 g

From the balanced equation above,

96 g of CH₃OH reacted to produce 138 g of HCOOH

Next, we shall determine the theoretical yield of HCOOH.

From the balanced equation above,

96 g of CH₃OH reacted to produce 138 g of HCOOH.

Therefore,

12 g of CH₃OH will react to produce = (12 × 138)/96 ≈ 17g of HCOOH.

Finally, we shall determine the percentage yield.

Actual yield of HCOOH = 14 g

Theoretical yield of HCOOH = 17 g

Percentage yield =?

Percentage yield = Actual / Theoretical × 100

Percentage yield = 14/17 × 100

Percentage yield ≈ 82%

The correct answer to the question is Option C. 82%

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first ionization energy

Answers

Answer:

The first ionization energy is defined as

Energy which is required to pull out one mole of the outermost shell's electrons in a neutral atom from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.[tex]A\to A^++ e^{-}[/tex] , where A is any neutral atom.In the periodic table, Its value decreases from top to bottom in groups and increases from left to right across a particular period. Helium has the largest first ionization energy.Francium has one of the lowest.

IUPAC name for [Fe(NH3)4Cl2]NO3

Answers

Tetraamminedichloridoiron(3) nitrate

What was the purpose of the periodic table?
A. To organize elements as they were discovered
O B. To list the chemical reactions an element can have
O C. To name elements as they were discovered
O D. To identify all the isotopes of each element
SUBMIT

Answers

Answer:

A

Explanation:

The purpose of the periodic table was to organize elements as they were discovered into periods and groups, according to their properties. It was not just a naming of elements, as a list.

The purpose of the periodic table was to organize elements as they were discovered. Thus option A is correct.

What is periodic table?

Periodic table is defined as an arrangement of all known elements in order of increasing atomic number and recurrent chemical attributes.

It can also be defined as a tabular arrangement of chemical elements ordered by increasing atomic number and element groups.

It helps us to learn about an ordered grouping of the 118 known chemical elements.

The periodic table contains alkali metal, alkaline earth metal, transition elements, noble gas, post transition element etc. and many more elements are arranged in periodic table in groups.

Thus, the purpose of the periodic table was to organize elements as they were discovered. Thus option A is correct.

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Select the most dilute solution a.A solution made by dissolving 60g of sodium hydroxide in 2000cm cubed b.A solution made by dissolving 40 g of sodium hydroxide in 1000 cm cubed of solution. c.A solution made by dissolving 10 g of sodium hydroxide in 250 cm cubed of solution. d.A solution made by dissolving 20 g of sodium hydroxide in 500 cm3 of solution.

Answers

Answer:

A, a solution made by dissolving 60g of sodium hydroxide in 2000cm³

Explanation:

Concentration = no. of moles / volume (in dm³)

1 dm³ = 1000cm³

no. of moles = mass / molar mass

molar mass of NaOH = 23.0+16.0+1.0 = 40 g/mol

Let's find the concentration of each of the solutions:

A:

= 60/40 /2

= 0.75 mol/dm³

B:

= 40/40 /1

= 1 mol/dm³

C:

= 10/40 / 0.25

=1 mol/dm³

D:

= 20/40 / 0.5

= 1 mol/dm³

Since 0.75mol/dm³ is the lowest concentration out of 4, it is the most dilute.

A drug problem can quickly consume A)a small portions of a person income B)the bulk of a person income C)a person excess income

Answers

Answer:

b

Explanation:

a drug problem consumes the bulk of a persons income because drugs are expensive to buy

A drug problem can quickly consume the bulk of a person income

What is a drug problem?

A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drug abuse or substance abuse refers to the use of certain chemicals for the purpose of creating pleasurable effects on the brain.

Drug use can have significant and damaging short-term and long-term effects. Taking some drugs can be particularly risky, especially if you take high doses or combine them with other drugs or alcohol.

People of any age, sex or economic status can become addicted to a drug. Certain factors can affect the likelihood and speed of developing an addiction.

The best way to prevent an addiction to a drug is not to take the drug at all. If your doctor prescribes a drug with the potential for addiction, use care when taking the drug and follow the instructions provided by your doctor. Thus you can save your income.

The correct answer is option B.

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Susan decides to take a job as a transcriptionist so that she can work part time from home. To get started, she has to buy a computer, headphones, and some special software. The equipment and software together cost her $1000. The company pays her $0.004 per word, and Susan can type 90 words per minute. How many hours must Susan work to break even, that is, to make enough to cover her $1000 start-up cost? If Susan works 4 hours a day, 3days a week, how much will she earn in a month. The price of the latest John Madden PS2 gam just increased to $55 last years version cost $50 what is the percent increase in price? Please help What is the value of x in equation 1/3 (12x -24) = 16 Thank you What is the value of x? Which financial activity helps a company based in another country?A. foreign direct investmentB.market valueC. price floorD. productivity Read the two excerpts from act 3, scene 2, of Julius Caesar. [BRUTUS.] If then that friend demand why Brutus rose against Caesar, this is my answer: not that I loved Caesar less, but that I loved Rome more. Had you rather Caesar were living, and die all slaves, than that Caesar were dead, to live all free men? As Caesar loved me, I weep for him. As he was fortunate, I rejoice at it. As he was valiant, I honour him. But as he was ambitious, I slew him. There is tears for his love, joy for his fortune, honour for his valour, and death for his ambition. [ANTONY.] The noble Brutus Hath told you Caesar was ambitious. If it were so, it was a grievous fault, And grievously hath Caesar answered it. Here, under leave of Brutus and the rest For Brutus is an honourable man, So are they all, all honourable men Come I to speak in Caesars funeral. He was my friend, faithful and just to me. But Brutus says he was ambitious, And Brutus is an honourable man. He hath brought many captives home to Rome, Whose ransoms did the general coffers fill. Which statements are true of both monologues? Select three options. The speaker uses sarcasm. The speaker uses repetition and parallelism. The speaker uses imagery. The speaker attempts to calm the audience. The speaker appeals to emotions. What is 20^2 + 54/9? A bacteria culture initially contains 100 cells and grows at a rate proportional to its size. After an hour the population has increased to 420. Find the rate of growth after 3 hours. Read and choose the correct option with the stem-changing verb in the preterite. La sobrina ________ (dormir) con su oso de peluche mientras esperaba su vuelo. dorm dorma durmi durmieron Prove that If A1, A2, ... , An and B1, B2,...,Bn are sets such that Aj Bj for j = 1, 2, 3, ... , n, then j=1nAj j=1nBj . Financing activities include receiving cash from issuing debt and receiving cash dividends from investments in other companies' stocks.A. TrueB. False What is the name of this tree? Las caras estn ________. seca secas seco secos Unit sales for new product ABC has varied in the first seven months of this year as follows: Month Jan Feb Mar Apr May Jun Jul Unit Sales 330 274 492 371 160 283 164 What is the (population) standard deviation of the data the question is in the photo please show work asdasd I don't actually have a question I accidentally typed this akjkdsk akasndansjawjk D is m Plants can onlycause mechanical weathering.Please select the best answer from the choices providedOTOF consider the difference of squares identity a^2-2b^2=(a+b)(a-b) Find the total surface area of this triangular prism 13cm 5cm 12cm 9cm 15cm 20cm