Chemistry High School

4. Which of the following
is an example of a
heterogeneous mixture?
a, tea
b. oxygen
c. pizza
d. water

Answers

Answer 1

Answer:

water

Explanation:

Answer 2

Answer:

c. pizza

Explanation:

Pizza is a heterogeneous mixture because it components are not uniform.

Related Questions

If I use warm water on my plants then they will grow faster as hot water increases metabolism." This is an example of

Question 1 options:

a hypothesis


a theory


a research question


a scientific explanation

Answers

Answer:

a hypothesis

Explanation:

A hypothesis is a statement that is supposed or assumed before conducting any experiment. It is the assumption that is made on the basis of certain knowledge and controlled evidence in the initial time of the experiment. The initial assumption helps in taking the experiment or the investigation further. The truth is not ascertained in the initial phase rather the completion of the investigation is necessary to make a hypothesis turn into a theory.  

In the given situation, the statement given is a hypothesis because the use of the warm water for the growth of the plants is the assumption made with respect to the metabolism effect on the humans.

An unknown element has two isotopes. The first isotope has a mass of 68.926 amu and an abundance of 60.108%. The second isotope has a mass of 70,925 amu and an abundance
of 39.892%. Calculate the average atomic mass AND identify the element.

Answers

Answer:

69.72344108

Gallium

Explanation:


M
r
(
G
a
)
=
69.7231
to 4 decimal places
.
Explanation:
To find the average atomic mass (
A
r
) of an element, given the percentage rarities of its isotopes, simply multiply each isotope's
A
r
by its percentage that is expressed as a decimal and total the results. We can carry this out in a single line of working:
M
r
(
Ga
)
=
(
68.9256
⋅
0.60108
)
+
(
70.9247
⋅
0.39892
)

M
r
(
Ga
)
=
69.7231
to 4 decimal places

Similarly, you could input the percentages normally and then divide by
100
:
M
r
(
Ga
)
=
(
68.9256
⋅
60.108
)
+
(
70.9247
⋅
39.892
)
100

M
r
(
Ga
)
=
69.7231
to 4 decimal places

Notice that the answers are the same. Also observe that the answer is closer to 69 than it is to 71, which makes sense since gallium-69 makes up a greater proportion of gallium in the universe (
~
60
%
) than gallium-71 does (
~
30
%
)


The invention of the microscope allowed scientists to see and study cells. True or false

Answers

Answer:

True

Explanation:

Please Help ASAP! Will Mark Brainliest

Answers

Answer: 35. it is 100°C

36. there is 7 periods in the periodic table

37. A heterogeneous mixture consists of visibly different substances or phases. ... Solutions have particles which are the size of atoms or molecules - too small to be seen. Oil and water form a heterogeneous or cereal and milk also makes a heterogeneous. a example of solution mixture is salt and water or rubbing alcohol.

38.  A two phase mixture is a mixture of two different substances. An example of a two phase mixture would be a soft drink. It is a liquid and a gas. To separate these two substances you could heat the liquid and then capture the carbon dioxide.

Explanation:

I hope this helps you out buddy stay safe

What is a mole in chemistry​

Answers

Answer:Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

Explanation:

How do ions form?
Please

Answers

By the addition or removal of electrons from a stable atom or molecule

NEED HELP ASAP
Select all the correct answers.
Which of these are examples of mixing and separating?
removing seed casings from grains
a soda bottle bubbling when it is opened
a bright copper statue turning green from weathering
removing salt from seawater
water decomposing to oxygen and hydrogen

Answers

removing seed casings from grains is SEPARATING. a soda bubble bubbling when it is opened is MIXING. a bright copper statue turning green is MIXING. remove salt from seawater is SEPARATING. water decomposing is SEPARATING.

Answer:

the answer is

removing seed casings from grains

removing salt from seawater

Explanation:

This question is regarding mixing and separating such as a physical change.

a soda bottle bubbling is a chemical reaction

copper statue is a chemical reaction

water decomposing to oxygen and hydrogen is also a chemical reaction

this question is talking about mixing and seperating as a physical change

Water
Specific Heat (J/c "C)
4.184
How much heat is needed to change the temperature of 50.0 g of water to 20.0°C

Answers

Answer:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Explanation:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Which pair of elements have the same number of atomic orbitals?
A.
Silver and strontium
B.
Sodium and strontium
C.
Silver and sulfur
D.
Sulfur and strontium

Answers

Answer:

B I think

Explanation:

Answer:

B, I'm guessing by their characteristics

Which of the following distinguishes an element from all other elements?
Its number of protons.
O
Its color in solid form.
o
Its phase at room temperature.
Its group in the Periodic Table.
Previous Question
Next Question

Answers

Answer:

Explanation:

The second best answer is its group on the periodic table.

That answer depends on the actual reason. The number of protons determines which element you are talking about.

When we have stomach disorder, we take antacid to solve the problem. How does it help? Support your answer with an equation.​

Answers

Answer:

its help us

equation- ( a)2+(b)2+2an

How much will it cost in American dollars(USD) to fill a 15 gallon tank of gasoline in Canada, if the price of gasoline there is $1.07 Canadian dollars (CAD) per liter. The current exchange rate is ($1.00(USD)= $1.34(CAD), 1 L=1.06 qts, 1.61 Km= 1 Mile, 1 gal= 4 qts]​

Answers

Answer:

It will cost 45.37 US dollars (USD) to fill a 15 gallon gas tank in Canada.

Explanation:

Two values ​​are directly proportional when when one value increases, the other increases in the same proportion, or when one value decreases, the other decreases in the same proportion.

The rule of three makes it possible to solve proportionality problems effectively and quickly. It is a method of calculating an unknown value that is directly proportional to another known value.

Then, knowing the data a, b and c, and the fourth unknown data x, which will be the unknown to be solved, this value is calculated as:

a ⇒ b

c ⇒ x

So: [tex]x=\frac{c*b}{a}[/tex]

You must calculate the cost in US dollars (USD) to fill a 15 gallon gas tank in Canada. You know that the price of gasoline is $1.07 Canadian dollars (CAD) per liter. If 1 L equals 1.06 qts, then you can say that the price of gasoline is $ 1.07 Canadian dollars (CAD) per 1.06 qts.

You can now apply a rule of three as follows: if 4 qts is equal to 1 gal, 1.06 qts is equal to how much gal is?

[tex]gal=\frac{1.06 qts*1 gal}{4 qts}[/tex]

gal= 0.265

Then you can say that the price of gasoline is $ 1.07 Canadian dollars (CAD) per 0.265 gal.  So you can apply the following rule of three: if 0.265 gal costs $ 1.07 Canadian dollars (CAD), 15 gal how many Canadian dollars cost?

[tex]CAD=\frac{15 gal*1.07 CAD}{0.265 gal}[/tex]

CAD= $60.8 CAD

Finally, you can apply the following rule of three: if $ 1.34 (CAD) is equal to $ 1.00 (USD), $ 60.8 (CAD) is equal to how many US dollars (USD)?

[tex]USD=\frac{60.8 CAD*1USD}{1.34 CAD}[/tex]

USD=   45.37

It will cost 45.37 US dollars (USD) to fill a 15 gallon gas tank in Canada.

can someone call me and help me with chemistry
860-833-8822

Answers

Answer: okay

Explanation:

Answer:

What exactly do you want help with

Explanation:

The Earth revolves in a path called_________around the sun.

Fill in the blank
Will get brainiest if correct.

Answers

It’s called revolution

Answer:

Revolution that is it

What type of energy results from the burning of wood or gasoline?

electric
nuclear
chemical

Answers

Answer:Electric

Explanation: Its right.

Chemical energy results from the burning of wood or gasoline. Therefore, option (C) is correct.

What is chemical energy?

Chemical energy is described as the energy which is stored in the chemical bonds formed in the chemical compounds. It is liberated during the chemical reaction and produces heat as a side-product which is known as an exothermic reaction.

Examples of chemical energy are biomass, natural gas, batteries, petroleum, and coal. When chemical energy is released from a compound, it is transformed into a completely new substance.

While burning wood or fuel, the chemical energy in the wood or gasoline is liberated as heat because of the chemical reaction of oxygen in the air and wood. This kind of chemical reaction is known as a combustion reaction. Combustion reaction converts the chemical energy stored in the wood into light energy and heat.

Therefore, in the burning of wood or gasoline, chemical energy is emitted.

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In a one or two paragraph summary explain why Sodium light is Orange and Potassium light is lilac when placed in a flame.
Use the words: electron, quantum jump, ground state, orbitals, photons, emitting, absorbing, light spectrum, energy mass (words are not in order)

Answers

Answer:

?

Explanation:

What is the density of a rectangle solid with dimensions
of 15 cm x 25 cm x 5 cm and has a mass of 3000 g?

Answers

Answer:

5625000gm/cm^3

Explanation:

volume=w*h*l=25*15*5=1875cm^3

density=mass*volume

=1875*3000

=5625000gm/cm^3

Formula for:
* Density: D = M/V?
* Mass: ?
* Volume?

(CHEMISTRY FORMULAS ONLY!!)

Answers

m=pV p(density) v(volume)
V=nRT/P

plz help for braniliest

Answers

Answer: i think b.

Explanation:

Help, please!

Which property of a substance can be determined using a pH indicator ?

Density
Acidity
Electrical Conductivity
Thermal Conductivity
Boiling Point

Answers

The answer is acidity, because pH indicators help indicate the H+ or OH- concentration in a solution. H+ concentrations create acids, and OH- make bases. pH indicators don’t indicate any of the other answers in the question, so the answer is Acidity.

Use what you know about periodic trends and the periodic table to answer the questions below.

Which atom attracts electrons most strongly when bonded?

oxygen (O)

magnesium (Mg)

Answers

Answer:

oxygen (O)

Explanation:

Answer:

A) oxygen (O)

Explanation:

edge 2023

Which property is the least reliable method for identifying a mineral
A. color
B. luster
C. streak
D. cleavage

Answers

Answer:

I think it is a color but I'm not completely sure

Answer:

Color

Explanation:

PLEASE HELP ME I WILL MARK AS BRAINLIST.

When we have stomach disorder, we take antacid to solve the problem. How does it help? Support your answer with an equation.​

Answers

Answer:

idk

Explanation:

what is balance equation and how we balance equation

Answers

Answer:

To adjust the substance condition, you need to ensure the quantity of molecules of every component on the reactant side is equivalent to the quantity of particles of every component on the item side. To make the two sides equivalent, you should duplicate the quantity of particles in every component until the two sides are equivalent.

Explanation:

calculate the number of molecules in 52 gram of helium​

Answers

Answer:

The molar mass that is the mass of 6.022 X 1023 atoms of helium is 4g. Hence 1 mole of He = 4 g of He = 6.022 X 1023atoms of He.

1 g of He = (6.022 X 1023) / 4 atoms of He.

52 g of He = (6.022 X 1023X 52 ) / 4 atoms of He.

Explanation:

How many moles of sodium hydroxide, NaOH, are in a 35.65 g sample
of NaOH? (The molar mass of NaOH is 40.01 g/mol.)

Answers

Answer:

0.8910 mols of NaOH in a 35.65 g sample of NaOH

Explanation:

Mass off NaOH = 39.997

given = 35.65 g of NaOH

35.65 g of NaOH * 1 mol NaOH = 0.8910, since there are 4 sig figs.

                                /40.01 g

A 35.65 g sample of NaOH contains 0.8910 moles of NaOH.

What is mole?

The mole, denoted by the sign "mol," is the volume of a system that has the same number of atoms in 0.012 kilograms of carbon-12 as there are elementary particles.

The mole, often known as mol, is a SI unit used to measure how many particles are present in a given substance. A mole is made up of 6.02214179 atoms or other fundamental building blocks like molecules.

Mass off NaOH = 39.997

given = 35.65 g of NaOH

No of moles of NaOH =35.65 g of NaOH × 1 mol NaOH /40.01 g

No of moles of NaOH = 0.8910 moles.

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What are some identifying factors of Sodium (Na)

Answers

Explanation:

what causes Spanish-American War

A mechanical pencil has a mass of 47.4 grams. The volume of the pencil is 15.8 cubic centimeters. What is the density of the pencil?

Answers

density = mass over volume
so
47.4g/15.8cm^3
=3g/cm^3

Answer:

3 g/cm^3

Explanation:

Density can be determined by mass divided by volume, or P=m/V.

This would be 47.4 grams (mass) / 15.8 cubic centimeters (volume). The units are grams per cubic centimeter, noted as g/cm^3.

A certain atom has 20 electrons, 21 neutrons, and 20 protons. What is the atomic mass of the atom?

Answers

The answer is 41

Explanation
To get the atomic mass you add the number of protons and neutrons

Example

21 neutrons + 20 protons = 41 Atomic mass
Hope this helps :)

I NEED HELP! An iron cube is placed in liquid water. Which particles have the higher kinetic energy?

Answers

Answer:

Liquid water has higher kinetic energy thn iron cube

Explanation:

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Assume xx to be the length of a square shaped bathroom. Include units in all parts. a. Calculate the average rate of change of cost when you change your bathroom from 10 feet to 12 feet long. b. Calculate the instantaneous rate of change of cost at length 10 feet. c. If the cost of shipping also depends on the length according to \$20(1 \sin{x})$20(1 sinx), what is the instantaneous change of cost at length 10 feet. A giraffe has an acorn fall from his mouth while he is eating. The giraffe's mouth is 6 meters off the ground. It falls and hits a rock that is 1.5 meters off the ground. How long did it take the acorn to reach the rock? The weather conditions at a given place over a long period of time is known as __________. I need help! is this correct if not please correct the sentence. HELP ASAP!!!!!!!!!!!!!! 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