How are mixtures and solutions different from each other?

A. there are no differences

B. one combiner chemically the other combines electronically

C. They have more than one element in them

D. the mixture can be separated and the solution is not easily separated

Answer: Registered. My 65 pound dog and my 20 pound dog share an 18 pound bag of 4Health and it lasts them 3 and 1/2 weeks.

Explanation:

Answer:

Well it depends how much the bag weighs in LB and your strength.

Explanation:

Answer:

B

Explanation:

She is unsure of which soil would allow the flowers to grow best so the soil that allows the flower to grow the most is the best soil.

Answer:

B. which soil type allows the flower to grow the most?

Answer:

A. Eggs and sperm

Explanation:

Genres are an organisms reproductive cells. Also referred to as sex cells. Females they are ova or egg cells, and males they are sperm.

Correct question is;

Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then error in the value of resistance of the wire is?

Answer:

6%

Explanation:

From ohms law, we know that;

R = V/I

Where;

R is resistance

V is voltage

I is current

Now, the percentage error in the resistance is given by the formula;

ΔR/R = ΔV/V+ ΔI/I

We are told that the current and the voltage difference have a percentage error of 3% each. Thus;

ΔR/R = 3% + 3% = 6%

Answer:

Answer:

The abundance of 35/17 Cl is 75% and 25% of 37/17Cl

Explanation:

The molar mass of an atom is defined as the sum of the masses of each isotope times its abundance, that is:

35.5amu = 35amu*X + 37amu*Y (1)

Where X is the abundance of the 35/17Cl and Y the abundance of 37/17 Cl

As there are just these 2 isotopes and the abundances of both isotopes = 1:

X + Y = 1 (2)

Replacing (2) in (1):

35.5 = 35X + 37(1-X)

35.5 = 35X + 37 - 37X

-1.5 = -2X

X = 0.75 = 75%

And Y = 100-75% = 25%

Answer:

bipetal

Explanation:

this is because 2 electrons will be donated by each element, as seen in NO2

Answer:

1. 7.227x10²⁴ O atoms

2. 0.1944 mol

3. 3.18x10²³ atoms

Explanation:

1. To solve this problem we need to use Avogadro's number, which states the number of molecules that are in 1 mol of a substance:

There are 3 O atoms per NaNO₃ molecule, thus the answer is (3* 2.409x10²⁴) 7.227x10²⁴ atoms.

2. First we convert 10.5 g of N₂O₅ into moles, using its molar mass:

There are 2 N moles per N₂O₅ mol, thus the answer is (2*0.0972) 0.1944 mol.

3. First we convert grams into moles:

Then we use Avogadro's number:

There are 14 O atoms per Fe(H₂O)₂(SO₄)₃ molecule, so the answer is (7.95x10²² * 4) 3.18x10²³ atoms.

Answer:

2H^+ +2e -> h2(g)

Explanation:

Since hydrogen is reduced, look for a decrease in oxidation number and the gain of electrons.

Answer:

ZnCl2 + H2

Explanation:

got it correct!

Answer:

hydrocarbons are compounds which contains Hydrogen and carbon

Answer:

16

Explanation:

2 KMnO4 (aq) + 16 HCl (aq) → 2 MnCl2 (aq) + 2 KCl (aq) + 5 Cl2 (g) + 8 H2O (l)

This is an oxidation-reduction (redox) reaction:

2 MnVII + 10 e- → 2 MnII (reduction)

10 Cl-I - 10 e- → 10 Cl0 (oxidation)

KMnO4 is an oxidizing agent, HCl is a reducing agent.

This is a gas evolution reaction, Cl2 is the formed gas.

Law of octaves states that when the elements are arranged in ascending order of atomic mass, every eighth element has comparable properties.

Features of law of octaves -:

Some limitations were made into this -:

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The law of octaves state about the elements​ that there must be 8 electrons in the outermost or valance shell of the electron to obtained the stability.

when the elements are arranged in the increasing order of atomic mass, every eighth element has comparable properties and  that  was the first time an atomic number was introduced  to each element of the periodic table.

To become the stable according to rule element must complete it octave otherwise it cannot be considered the stable one.

Therefore, law of octaves state about the elements​ that there must be 8 electrons in the outermost or valance shell of the electron to obtained the stability.

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Answer:

solvent

Explanation:

the solvent is usually a liquid substance

Answer:

H

Explanation:

b/c the polyatomic PO4¯³

have 3 valance number

Answer:

salt i know the answer and even sugar is

Answer:

The nucleus consists of 4 protons (red) and 5 neutrons (orange). Four electrons (white) occupy available electron shells (rings). The stability of an element's outer (valence) electrons determines its chemical and physical properties. Subatomic particles are particles that are smaller than the atom. Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P."

hope this helped:)

brainliest?

A beryllium atom has atomic number 4 where its nucleus has 4 protons  and 5 neutrons  and 4 electrons revolving around the nucleus in in the shells.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Answer:

212 degrees

Explanation:

Answer:

212 degrees Fahrenheit

Explanation:

Similarly, if we heat a volume of water above 100 degrees Celsius, or 212 degrees Fahrenheit, water changes its phase into a gas called water vapor. Changes in the phase of matter are physical changes, not chemical changes.

Answer:

Second-degree burns, or partial thickness burns, are more severe than first-degree burns. They affect the outer layer of skin, called the epidermis, and part of the second layer of skin, called the dermis. Second-degree burns can be very painful and often take several weeks to heal.

Explanation:

The question is incomplete. The complete question is :

A worker paints a 5.2 foot wide crosswalk on a street her boss tells her to make crosswalk 1.25 feet wider. How wide is the finished crossroad ?

Solution :

It is given that the worker paints a crossroad on a street whose width is = 5.2 feet.

The boss of the worker asks the worker to make the width of the cross road 1.25 feet more wider.

Thus the required width of the cross road is = 5.2 feet + 1.25 feet

                                                                         = 6.45 feet.

Therefore the finished cross road is = 6.45 feet wide.

A chemical property of a substance is a certain characteristic that can only be observed by participating in a chemical reaction. Alternatively, a chemical property of a substance is something that can only be observed when the substance undergoes a chemical change.

I'm not sure what you're supposed to do with the first four boxes; all four are examples of chemical properties. Do you have to name the specific type of chemical property as given in the description? If so, the following would be my answers:

Flammability/Combustibility: The ability of a substance to burn.

The next two are quite strange; I'm not aware of a term that cleanly describes reactivity with water or acid. I suspect that, given the level of the material here, the general property of "reactivity" might be the answer for both the second and third descriptions

(Water-)reactivity: Some substances react when put in water.

(Acid-)reactivity: Some substances react when put in acid.

Light sensitivity: Light can interact with some things to form new substances.

As for the chart, I've filled it in as shown in the attached image. Please take care to double-check what I've written; in particular, when it comes to the property, I might have used a different term from what you were taught in class or provided in some other resource that I don't have access to. I've also color-coded qualitative/quantitative and physical/chemical for your convenience.

Answer:

100.5 J

Explanation:

Answer:

A. Florine has a stronger pull than Magnesium

Explanation:

Electronegativity refers to the tendency in which an tom would attract electrons to itself.

Below each element in the periodic table is their electronegativity value. Florine has the highest electronegativity value of 4.0.

Going through options;

A. Florine has a stronger pull than Magnesium

Florine = 4.0

Magnesium = 1.2

This correct

B. Hydrogen has a stronger pull than Phosphorus

Hydrogen = 2.1

Phosphorus = 2.1

This is wrong

C. Potassium has a stronger pull than Sodium

Potassium = 0.8

Sodium = 0.9

This is wrong

D. Iron has a stronger pull than Bromine

Iron = 1.8

Bromine = 2.8

This is wrong

Answer:

SEE EXPLANATION

Explanation:

A)

1) The balanced  chemical reaction is;

Fe2O3 + 3H2O------> 2Fe(OH)3

2) C12H22O11------> 12 C + 11H2O

B)  1 is a combination reaction

     2 is a decomposition reaction

C) The molar mass of NH3 is 14 + 3(1) = 17 g/mol

Percentage composition of N = 14/17 * 100/1 = 82. 4 %

D) 1 mole of O2 contains 6.02 * 10^23 particles

E) For (NH4)3 PO4

We have 3(14 + 4(1)) + 31 + 4(16) = 149 g/mol

F) 1 mole of CaCO3 contains 100g of CaCO3

1.25 moles of CaCO3 contains 1.25 * 100/1 = 125 g of CaCO3

Answer: b

Explanation: