When a light switch is turned on, it releases more energy than it had when it was off. True or False. And Why?

Answer:

sexual

Explanation:

During asexual reproduction, an organism splits into two separate organisms making them look the same.

An organism that was produced from sexual reproduction can have a number of combinations from both parent. For example if your mm had green eyes and your dad had brown eyes, you could either have brown, green, or hazel eyes. Or you could be a rare person that has one brown eye and one green eye... but like I said, that's rare in a person

Answer:

Metals shows the property of malleability while non-metals are non-malleable. Metals are generally those substances that have a shiny surface and thus are lustrous. Whereas non-metals have non-shiny appearance and thus falls under the category of non-lustrous substances.

Answer:

Number of moles = 2.72 mol

Explanation:

Given data:

Number of moles of H₃PO₄ present = ?

Molarity of solution = 18.1 M

Volume of solution = 150.0 mL (150/1000 = 0.15 L)

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

By putting values,

18.1 M = number of moles / 0.15 L

Number of miles = 18.1 M × 0.15 L

Number of moles = 2.72 mol

Answer:

319

Explanation:

The molecular mass of C3H18 can be found by adding up the molecular weights of carbon and hydrogen so, (12.01 x 3) For Carbon and (1.008x18) for hydrogen. You will find it is 54.174g/mol.

To find grams muliply g/mol by mols so 5.9 x 54.174= 319 i didnt see any errors with my math so maybe you clicked 8 by accident but i may just be wrong

Answer:

Physical change

Explanation:

Answer:

It is a homogenious mixture because it has the same consistency throughout. It is just a frozen block of juice. Think about it. It also has the same substance throughout.

Explanation:

Answer:

rain

Explanation:

rain drops are water and water us a liquid

Answer:

one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behaviour but with different atomic masses and physical properties

Explanation:

Answer:

what is an isotope? isotopes are versions of the same element. They have the same number of protons and electrons as the element but different mass numbers and number of neutrons.

Explanation:

hope this helps! :)

Answer:

See explanation

Explanation:

It is commonplace to put polyatomic ions in parenthesis when they are more than one in a compound. A typical example here is calcium phosphate- Ca3(PO4)2.

When a compound contains more than a single polyatomic ion of the same type,a parentheses is placed  around the formula of that ion then a subscript is used to indicate how many  of that particular ion are in the compound.

Answer:

There are 1.57 * 10²² bromide ions present in 3.5 g of AgBr₂

Explanation:

Equation for the ionization of silver bromide, AgBr2 is given below

AgBr₂ ----> Ag²⁺ + 2Br⁻

1 mole of AgBr2 produces 2 moles of bromide ions

molar mass of silver bromide 268 g/mol

molar mass of bromide ion 80 g/mol

number of moles in 3.5 g of AgBr₂ = mass/molar = 3.5 / 268 = 0.013 mole

0.013 moles of AgBr₂ will produce 2 * 0.013 moles of Br⁻ = 0.026 moles

One mole of a substance contains 6.02 * 10²³ particles. Therefore, one mole of bromide ions will contain 6.02 * 10²³ ions.

Number of ions present in 0.026 moles of bromide ions = 0.026 * 6.02 * 10²³ = 1.56 * 10²² ions.

Therefore, there are 1.57 * 10²² bromide ions present in 3.5 g of AgBr₂

Answer:

A.  It has a low pH

Explanation:

pH scale is 0 to 14 with 7 being neutral.  Any thing below 7 is acidic  Above 7 is a base or alkaline

Lower the pH the more careful you must be when handling the chemical.  Strong Acid can do irreparable harm to eyes, skin, mucus membranes, eat holes in clothing etc.  USE APPROPRIATE PPE

Below is pasted in definition you can look up in your textbook or online search.

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

The label of a strong acid is referring a chemical that has a low pH value. Therefore, option (A) is correct.

An acid can be defined as any substance that has the ability to donate a proton to another substance. A base has the capability to accept a hydrogen ion from an acid.

Acidic substances are recognized by their sour taste and can be energetically favorable after a loss of hydrogen H⁺ ion. Bases are recognized by a bitter taste and can dissolve in water.

When bases combine with acids, they form salts and water as products. Bases turn red litmus paper into blue while acids turn blue litmus into the red.

The pH value of the acids on the pH scale lies between 0 to 7 and the pH value of the bases on the pH scale lies between 7 to 14.  Therefore, the given chemical is strong acid so it will have a low pH value.

Learn more about acids and bases, here:

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Atoms that lose electrons acquire a positive charge as a result because they are left with fewer negatively charged electrons to balance the positive charges of the protons in the nucleus. Positively charged ions are called cations. Most metals become cations when they make ionic compounds.

Answer:

lol I hate chemical but let me give some advice

Explanation:

Please go on Khan Academy or look at your notes and I promise you can figure out! Seriously, I am trying to be helpful not like the annoying teacher that says "figure it out"

About 6.25 moles of oxygen.

Answer:

Mg + O2 → MgO

Explanation:

Answer:

volcanos i think

Explanation:

learned it in 6th grade

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass

From the question we have

[tex]a = \frac{1.4}{7} = \frac{1}{5} \\ [/tex]

We have the final answer as

Hope this helps you

8,394m2 for 7kg with force 1.4

Answer:

a

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question we have

[tex]density = \frac{55.221}{67.1} \\ = 0.822965...[/tex]

We have the final answer as

Hope this helps you

Answer:Atoms acquire the stable electron structure of a noble gas by losing electrons. An atom of an element in Group 1A has seven valence electrons. Among Group 1A and 2A elements, the group number is equal to the number of valence electrons in an atom of that element.

Explanation: Hope this help have an wonderful day and stay safe! :D

Answer:

0.12 g/L

Explanation:

We first calculate its molar mass M = solubility at STP × molar volume = 0.14 g/L × 22.4 L/mol = 3.14 g/mol

Using the ideal gas law, PV = mRT/M where P = pressure at STP = pressure at 50°C = 1 atm, V = volume of gas, m = mass of gas, R = molar gas constant = 0.082 atm L/mol-K, T = temperature of gas = 50°C = 273 + 50 = 323 K and M =molar mass of gas = 3.14 g/mol

So, PM/RT = m/V = solubility of gas at 50°C

So, PM/RT = 1 atm × 3.14 g/mol/(0.082 atm L/mol-K × 323 K)

= 3.14 atm g/mol ÷ 26.486 atm L/mol

= 0.119 g/L

≅ 0.12 g/L

Answer:

Changing states of matter and energy

A block of ice is solid water. When heat (a form of energy) is added, the ice melts into liquid water. ... Continue to cool the water (by removing heat), and it becomes solid ice. This is its freezing point.

The compound which contains  an alkaline earth metal and a halogen is CaCl₂.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

Learn more about compound,here:

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Answer:

d = 8 g/mL

Explanation:

Given data:

Mass of metal = 24 g

Volume of eater = 45 mL

Volume of water + metal = 48 mL

Density of iron metal = ?

Solution:

Volume of metal:

Volume of metal = volume of water+ metal - volume of water

Volume of metal = 48 mL - 45 mL

Volume of metal = 3 mL

Density of metal:

d = m/v

d = 24 g/ 3 mL

d = 8 g/mL

Answer:

True

Explanation:

Blank 1 :- Potential Energy

Blank 2 :- Kinetic Energy

Black 3 :- Potential Energy

Blank 4 :- Kinetic Energy

Blank 5 :- Kinetic Energy

Blank 6 :- Potential Energy

1) Kinetic Energy

2) Potential Energy

3) Potential Energy

4) Kinetic Energy

5) Kinetic Energy

6) Kinetic and Potential Energy

7) Kinetic and Potential Energy

It is the type of energy possessed due to the motion or position. The objects do the work done by spending this energy. It is either Kinetic Energy or Potential Energy. It is also sometime referred as Total Energy.

The energy possessed by the object due to its motion.

Energy Possessed or conserved by the object due to its height or position is Potential Energy.

where,

m is mass

g is acceleration due to gravity

h is height

it is 3.9 i know tgis because you throw a rock with a mass of 3.6 kg. the ball leaves your hand with a speed of 10

Explanation:

34.31+35.45(2)=

27.31+70.90=

95.21g/mol

Answer:

whats both

Explanation: