Chemistry High School

Which of the following would NOT be an example of a chemical change

Yeast produces carbon dioxide gas to make dough rise.

Two white liquids mix together to create a pink solid

Lighting a fire to keep warm.

Sugar is dissolved into tea to make it taste sweeter.

Answers

Answer 1

Answer:

D. Sugar is dissolved into tea to make it taste sweeter.

Explanation:

it is a physical change

Related Questions

parasitic protists passed by mosquitoes causes this disease

Answers

Answer:

Malaria

Explanation:

Mosquitos mainly carry Malaria since the dawn of men.

Answer:

malaria

Explanation:

"Malaria" is a mosquito-borne illness that is caused by a parasitic protist called "Plasmodium protozoa." These parasites are carried by mosquitoes. Once a mosquito bites a human, it creates an opening for the parasites to enter. The parasites then become harmful once they enter the human body. They infect the human's Red Blood Cells (RBCs), which causes several symptoms such as fever, fatigue, headache, cough, nausea, etc.

Calculate the new volume in liters of a 0.500 L water bottle at 25.0 degrees when the plastic bottle is submerged in ice water at 1.00 degree Celsius.

Answers

Answer:

0.02L

Explanation:

Using the formula V1/T1 = V2/T2

Given

V1 = 0.5L

T1 = 25 degrees

T2 = 1 degree

V2 =?

Substitute

0.5/25 = V2/1

Cross multiply

25V2 = 0.5

V2 = 0.5/25

V2 = 0.02L

Hence the new volume will be 0.02L

I will give brainliest and so many points

Answers

You would take 10 minus one to get 9 and divid it by 3 to get 3. You take 7 plus 1 to get 8 and divided 16 to get 2.

How many grams of Ag are produced if I start the reaction with 5.5 mol Cu?

Equation given:
Cu + 2AgNO3 -> 2Ag + Cu(NO3)2

Answers

Answer:

9.34 g Ag

Explanation:

Chemical Reaction Type of reaction

2NaCl 2Na + Cl2 _________________________

CaCl2 + F2 CaF2 + Cl2 _________________________

AgNO3 + KCl AgCl + KNO3 _________________________

N2 + H2 2NH3 _________________________

C3H8 + 5O2 3CO2 +4 H2O _________________________

Answers

Answer:

Explanation:

2NaCl 2Na + Cl2         synthesis reaction

CaCl2 + F2 CaF2 + Cl2          oxidation-reduction

AgNO3 + KCl AgCl + KNO3      precipitation reaction

N2 + H2 2NH3      i dont know

C3H8 + 5O2 3CO2 +4 H2O Balanced Chemical Reactions and the Conservation of Mass

The bonding and molecular polarity in a molecule of Cl2 is best described as...
a. non polar/polar
b. polar/polar
c. non polar/ nonpolar
d. polar/ ionic

Answers

Answer:

The bonding and molecular polarity in a molecule of CI2 is best described as palar / polar

Which function is not associated with cartilage?

Answers

Answer:

Cartilage does not contain blood vessels (it is avascular) or nerves (it is aneural). Some fibrocartilage such as the meniscus of the knee does however have blood supply in part. Nutrition is supplied to the chondrocytes by diffusion.

1. What do microorganisms share in common?​

Answers

Answer:

Bacterial species are typified by their diversity. There are three notable common traits of bacteria, 1) lack of membrane-bound organelles, 2) unicellular and 3) small (usually microscopic) size.

Explanation:

What Are the Characteristics Common to All Bacteria?

Single-Celled. Perhaps the most straightforward characteristic of bacteria is their existence as single-celled organisms. ...

Absent Organelles. ...

Plasma Membrane. ...

Cell Walls. ...

DNA.

I will give brainliest and so many points

Answers

Answer:are there any answer option? cause i know but i have to make sure

Explanation:

1. What are commonly called as "shooting stars"?
A. asteroids
B. comets
C. meteors
D. meteorites

2. What are found in the circular or somewhat like "doughnut-shaped"
region between Mars and Jupiter?
A. asteroids
B. comets
C. meteors
D. meteorites

3. Which Near-Earth Objects (NEO) are found on the Kuiper Belt and Oort
Cloud?
A. asteroids
B. comets
C. meteors
D. meteorites

4. What are comets made of?
A. dust only
B. metal only
C. dust and metal
D. dust, metal, and ice

5. What do you call the shining "head" around a comet?
A. coma
B. crown
C. halo
D. ring​

Answers

Answer:

I hope I can help you

I hope I can help you

What volume (in L) of water vapor will be

produced from the reaction of 24.65 L of oxygen?

2C2H6(g) + 702(g) —4CO2(g) + 6H2O(9)

Answers

Answer: 21.13 L of [tex]H_2O[/tex] will be produced from the reaction of 24.65 L of oxygen

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

[tex]2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)[/tex]  

According to stoichiometry :

7 moles of [tex]O_2[/tex] give = 6 moles of [tex]H_2O[/tex] vapour  

[tex]7\times 22.4L=156.8L[/tex]  of [tex]O_2[/tex] produce = [tex]6\times 22.4L=134.4L[/tex] of [tex]H_2O[/tex] vapour  

Thus 24.65 L of [tex]O_2[/tex] produce = [tex]\frac{134.4}{156.8}\times 24.65=21.13[/tex] L of [tex]H_2O[/tex] vapour  

21.13 L of [tex]H_2O[/tex] will be produced from the reaction of 24.65 L of oxygen

Answer:

21.13

Explanation:

Based on graph 4 across a period the electronegativity​

Answers

4


Answer with explanation
Can you please type the question here?

pleaseeeeeeeeeeee help me asap

my question is
'Scientists believe another Pangea is in Earth’s future. Explain why the evidence of tectonic plate motion supports this belief.'


help please and thank you

Answers

Answer:

eu nu insteleg ce zite

Explanation:

Answer:

We know that the movement of tectonic plates is a continuous process. Divergent plates cause the ocean floor to expand. Because of slab pull, subduction, and other processes, the landmasses keep drifting. Because of these movements, continents are continually moving apart from each other. It’s possible that one day they will collide to form a giant landmass and become another Pangea.

Explanation:

here^^

Barium chloride solution was used to test for sulfate ions in the presence of dilute hydrochloric acid. What color precipitate would
form if sulfate ions were present?

Answers

Answer:

white

Explanation:

A white precipitate of barium sulfate forms if sulfate ions are present. The hydrochloric acid is added first to remove any carbonate ions that might be present - they would also produce a white precipitate, giving a false positive result. Barium nitrate solution can be used instead of barium chloride solution

is Fe2(CO3)3 soluble?

Answers

Yes it’s a soluble because the carbonate should dissolve in any strong acid with much effervescence

What is the molarity of a solution that has 2.87 moles of NaCl in 5020 mL of solution?

Answers

2.87 mol/5.020 L (converting mL to L) = .572M

KMnO4 + H2S + HCl KCl + MnCl2 + H2O + S8 Did Cl change oxidation number? Yes, no Did Oxygen change oxidation number? Yes, no Did H change oxidation number? Yes, no Did Mn change oxidation number? Yes, no Did S change oxidation number? Yes, no oxidizing agent = K, O, Mn, S reducing agent = Mn, H, Cl, S

Answers

Explanation:

KMnO4 + H2S + HCl --> KCl + MnCl2 + H2O + S8

Did Cl change oxidation number?

The oxidation  number of Cl in Reactant side is -1

The oxidation number of Cl in product side is -1

NO

Did Oxygen change oxidation number?

The oxidation number of O in Reactant side is -2

The oxidation number of O in product side is -2

NO

Did H change oxidation number?

The oxidation number of H in Reactant side is 1

The oxidation number of H in product side is 1

NO

Did Mn change oxidation number?

The oxidation number of Mn in Reactant side is +7

The oxidation number of Mn in product side is +2

YES

Did S change oxidation number?

The oxidation number of S in Reactant side is -2

The oxidation number of S in product side is 0

YES

Oxidizing agent (element with decrease in oxidation number) = Mn

Reducing agent (element with Increase in oxidation number) = S

pls help 6th grade science

Answers

Answer:

C.)

Explanation:

I also saw this question on Brainly! Hope this helps!

The picture to the right is the crystal of a
diamond. Circle three individual atoms of
carbon
Are these the same type or different
atoms?

Answers

Answer:

Circle Any 3 Red Spheres

Explanation:

All of these atoms are Carbon (C), as diamond is a network solid composed entirely of Carbon.  They are all the same.

What is the systematic name and molecular formula of these two:

Answers

Answer:

2,4-di Ethyl-2-methylpentane

C10H22

3,4 dimethyl heptane

C9H20

Explanation:

Which characteristic is true of sexual reproduction but not of asexual reproduction?

Answers

Answer:

Sexual Reproduction involves two different parties

Explanation:

Asexual is the opposite, so it uses no one else to reproduce

Answer:

Sexual reproduction produces diverse offspring .

Sexual reprodction produces more variations whereas asexual reproduction usually produces very similar organisms

Explanation:

What happens when the pressure of a gas is decreased?
A. The number of molecules increases.
B. The diffusion rate increases.
C. The temperature increases.
D. The volume increases.

Answers

Answer:

The combined gas law states that the pressure of a gas is inversely related to the volume and directly related to the temperature. If temperature is held constant, the equation is reduced to Boyle's law. Therefore, if you decrease the pressure of a fixed amount of gas, its volume will increase.

Explanation:

Answer:

D. The volume increases.

Explanation:

100%

the red is neutrons and the blue is protons...I'm pretty sure.

Answers

yes it is. the black ones are electrons as well

Answer:

Beryllium atom

Explanation:

What happens in a
neutralisation reaction.

Answers

Answer:

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water. Salts are also formed in this reaction.

Explanation:

What charge does a covalent bond have?

Answers

Basically a covalent bond would have been made based on two atoms so that it can collaboratively set a trace of more electrons. Although there is no atom that is zero which if it had that then it would considerably be a net charge which it is not from this problem. What makes it unique about it is that this attractive force from creating the bond of the electrons that would be purposely activated that are the nuci for constructive used into two atoms.

the taste of acid is sour​

Answers

yes the taste of acid is sour

Explanation:

the acid increase the hydrogen concentration, which provides more ions for the tongue. Because the tongue gains ions, it registers the flavor as sour.

4. A separating funnel can be used to separate a mixture of two________ liquids. *
a) miscible
b) homogenous
c) immiscible
d) distilled

Answers

Answer:

d) distilled

Explanation:

A separatory funnel, also known as a separation funnel, separating funnel, or colloquially sep Funnel and fractionating Funnel. , is a piece of laboratory glassware used in liquid-liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities.

Answer:

d) distilled

Explanation:

Correct!!!

true or false
sugar melting an example of oxidation
and
water evaporating

Answers

Answer:

false i think

Explanation:

What are calories used for?

hurry pls!

Answers

Answer:

Calories are used for physical activity.

Explanation:

Calories provide energy for consumers. You may notice when you drink or eat, you gain more energy. This is because calories are stored in our drinks and foods.

Answer:

They are

Explanation:

They are used to make people obese. The government uses calories to make people weak and unhealthy. For example, McDonalds is known to have many calories in their food. I hate the government.

Help me out guys

:)

Answers

Answer:

2 chloride ion, Cl¯

Explanation:

The formula for calcium chloride is CaCl₂.

Next, we shall write the balanced dissociation equation for calcium chloride, CaCl₂. This is illustrated below:

CaCl₂ (aq) —> Ca²⁺ + 2Cl¯

From the balanced equation above,

We can see that calcium chloride, CaCl₂ contains 1 calcium ion, Ca²⁺ and 2 chloride ion, Cl¯.

Therefore, we can conclude that for every 1 calcium ion, Ca²⁺, there are 2 chloride ion, Cl¯.

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