Two substances each have a
temperature of 23 degrees Celsius.
After they are combined the
temperature rises to 27 degrees
Celsius. What evidence proves a
chemical reaction occurred?

Answers

Answer 1
The answer is temperature change

Related Questions

1.the study of blood serology

2.the development of digital storage and technology for use in bioscience applications biochemistry

3.the study of poisons genetics

4.the study and use of biological structures and processes for industrial purposes bioinformatics

5.the scientific study of heredity epigenomics

6.the study of the effects and interaction of the expression of genes toxicology 7.the study of the chemistry of organisms biotechnology

8.the study of decomposition of bodies after death anthropology

Answers

The various field of science include the following;

1. Serology.

2. Bioinformatics.

3. Toxicology.

4. Biotechnology.

5. Genetics.

6. Epigenomics.

7. Biochemistry.

8. Taphonomy.

"Fields of Science"

Science is the interest and application of information and understanding of the normal and social world taking after a precise strategy based on prove.

1. Serology: The study of blood.

2. Bioinformatics: The development of digital storage and technology for use in bioscience applications.

3. Toxicology: The study of poisons.

4. Biotechnology: The study and use of biological structures and processes for industrial purposes.

5. Genetics: The scientific study of heredity.

6. Epigenomics: The study of the effects and interaction of the expression of genes.

7. Biochemistry: The study of the chemistry of organisms.

8. Taphonomy: The study of decomposition of bodies after death.

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Select the reason cities tended to develop at the fall line on rivers.

Answers

Towns began to develop along river valleys, where water was available. There were some important reasons for this. The land along the rivers is fertile. Animals can also be raised if there is enough food and water for them.

Hope this helped

PLZ HELP WILL GIVE U BRANILEIEST

Answers

Answer:

I'm pretty sure it is C

Explanation:

because it has the same number of protons and neutrons

What are the 3 ways that materials can bond?

Answers

Answer:

Ionic bonding

covalent bonding

metallic bonding

Answer:

Iether they Heat up and melt together, Gravity pulls them together into one, Or the atoms inside one decide to bond with the other.

Explanation:

Question 3 is weird but I ran out of answers.

6. How many millimeters are there in 2.0 meters?
7. How many grams are there in 5.0 kilograms?
8. How many liters are there in 15.0 centiliters?

Answers

6. 2000 milimeters
7. 5000 grams
8. 0.15 liters

What is the effect of constant stirring on the solubility of solids and liquids?

Answers

Stirring affects how quickly a solute dissolves in a solvent, but has no effect on how much solute will dissolve. The amount of solute that will dissolve is affected by temperature - more will dissolve at higher temperatures. This is called the solubility of the solute

what is the mass of 80.0mL of ethanol at 20 degress celcius

Answers

Answer: What is the mass, in grams, of 135 mL of ethanol? d=0.789 g/mL - the ethanol density. V=135 mL - the volume of ethanol. m=0.789g/mL*135mL=106.515g ~ 106.5g- the mass of ethanol.

Explanation:

Hope this helps :)

Which of the following statements about matter at
room temperature is true?
a. A solid has a definite volume, but a liquid's
volume can change.
b. Both a solid and a liquid Have a definite shape.
c. A solid has a definite shape, but a liquid's shape
can change.
d. Both a solid and a liquid have volumes that can
change.
e. A solid's shape can change, but a liquid has a
definite shape.

Answers

Answer: D

Explanation: If there was ice, the volume will change, if there was liquid (ex: water), it wouldn’t melt.

Why is there so much heat released following a combination reaction

Answers

Answer: When a combination reaction occurs between a metal and a non-metal the product is an ionic solid.

Explanation: Another hint(s): When magnesium burns in air, the atoms of the metal combine with the gas oxygen to produce magnesium oxide. This specific combination reaction produces the bright flame generated by flares.

Need answer ASAP.
Which areas of the Earth receive the LEAST amount of sunlight?
A-the equator
B-the temperate zone
C-the tropics
D-polar regions

Answers

D- polar regions

North and south polar has the least amount.

Who would most likely be required to work with sodium hydroxide?
a plumber
a gardener
a bricklayer
a mechanic

Need answer ASAP

Answers

Sodium hydroxide NaOH is proven to be an active agent for improving the mechanical properties of the bricks. Hence, bricklayer most likely need sodium hydroxide.

What is sodium hydroxide?

Sodium hydroxide is an ionic compound formed by the metallic sodium and  water. Sodium hydroxide has the chemical formula NaOH. It is a strong base and used as a reagent in many chemical synthesis which has to be carried in presence of a base.

Sodium hydroxide has an effect on the drying kinetics of bricks which are made with clay. Studies reported that the drying duration is linearly related with the concentration of NaOH.

Drying duration of bricks layers increases with increase in concentration of NaOH as well as the material porosity decreases. and hence the bricks will not show the visible cracks. Therefore, bricklayer need NaOH.

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Answer:

A) a plumber

Explanation:

A continental slope is the boundary between what to types of Earth's crust?
A Basalt and Sandstone
B Convergent and Divergent
C Continental and Oceanic
D Volcanic and Sedimentary

Answers

Answer:

c

Explanation:

I took the k12 test and got it right

A continental slope is a boundary between the Continental crust and Oceanic crust. Therefore, option (C) is correct.

What is a continental slope?

A continental slope can be described as the slope between the outer edge of the continental shelf and the deep ocean floor. The continental slope is defined as a cut by submarine canyons in many locations and marks the seaward edge of the continental shelf.

Continental slopes follow the boundary between continental and oceanic crust. The Continental slope has a steepness range from 1 to 25 degrees, the average is 4 degrees.

The continental margin lies between the continental shelf and the abyssal plain and comprises a continental slope that is surrounded by the flatter continental rise. It contains thick sediments deposited by currents from the shelf and slope.

The shelf generally ends at a point of increasing slope known as the shelf break and the sea floor under the break is the continental slope.

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Which of the following statements is most accurate?
A. When liquid water is heated, the molecules move faster.
B. When liquid water is heated, the molecules collide more often.
C. When liquid water is heated, collisions between molecules are more violent.
D. All of the above.

Answers

Answer:

D: All of the above

Explanation:

It's all of the above, they are all pretty similar to the accurate answer.

Answer:

D

Explanation:

The model represents a

Answers

I don’t understand your question. A model could represent a graph, a Venn diagram, a line graph, a circle graph and more!

Answer:

i think you forgot to add a picture

Help Please. The word tsunami comes from a Japanese word meaning _________________. *
A. harbor wave
B. earthquake wave
C. tidal wave
D. harbor tide

Answers

Help Please. The word tsunami comes from a Japanese word meaning

A. harbor wave

Answer:

A.

Explanation:

give brainlist

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

(CHEMISTRY FORMULAS ONLY!!)

Answers

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

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

What is the most likely reason that nonmetals are electrical insulators?

Since valence shells are mostly empty in nonmetal atoms, the atoms attract and hold any electrons they can in order to fill their valence shells.

Since valence shells in nonmetal atoms are almost full, the atoms attract electrons and hold them tightly to fill their valence shells.

Since all nonmetals have valence shells that are full, they hold electrons tightly to avoid changing.

Since all nonmetals have valence shells that are completely empty, they do not attract or release any electrons.

Answers

Answer:

Since valence shells are mostly empty in nonmetal atoms, the atoms attract and hold any electrons they can in order to fill their valence shells.

Answer:

a

Explanation:

HELP PLEASE
Chemical name for As2S3

Answers

Answer:

Chemical name for As2S3 is Arsenic sulfide

Explanation:

Answer:

Arsenic Sulfide

Explanation:

Density is a physical property of a molecule that’s measured as mass per unit volume. (a) Given that density is usually expressed in the units of g/cm^3, calculate the density of a cube of plastic that has a mass of 2.331 g and an edge length of 1.500 cm (volume of a cube is V = l^3). (Show work pls + WILL MARK BRAINLIEST)

Answers

Answer:

0.690666... g/cm^3

Explanation:

density=mass/volume. mass is 2.331 g and using the length we can determine that the volume of the cube is 3.375 cm^3. 2.331/3.375= 0.6906666....

is hydrogen a neutral atom or ion

Answers

Answer:

Hydrogen is the smallest chemical element. It has one proton and one electron, making it neutral. However, the ions of hydrogen atom are charged species. Thus, the key difference between hydrogen atom and hydrogen ion is that the hydrogen atom is neutral whereas hydrogen ion carries a charge.

Answer:

A normal hydrogen (H) atom does not have any neutrons in its tiny nucleus. That tiny little atom (the tiniest of all) has only one electron and one proton. You can take away the electron and make an ion, but you can't take away any neutrons.

Explanation:

Explain how balancing chemical equations relates to the law of conservation of matter.

Answers

Answer:

In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Showing that Mass cannot be created nor destroyed in a chemical reaction

Explanation:

What has the higher first ionization energy? Mg or Cl

Answers

Ionization Trend: First ionization energy will increase left to right across a period and increase bottom to top of a family (column).

If we compare Mg and Cl:

Mg is column 2 (far left) in the periodic table, while Cl is column 17 (far right). Based on the ionization rule explained above, Cl will have the higher first ionization energy.

Which of the following is a result of intermolecular forces

Answers

Answer:

The three major types of intermolecular interactions are dipole–dipole interactions, London dispersion forces (these two are often referred to collectively as van der Waals forces), and hydrogen bonds

What do you call all the water on Earth's surface?

Answers

Answer: The hydrosphere includes all of the water which is on the surface of the planet. A planet's hydrosphere can be vapor, ice, or liquid.

Answer:

hydrosphere

Explanation:

Which group of elements should all have similar chemical behavior?

magnesium, strontium, and sodium
b) sulfur, phosphorus, and silicon
c) hydrogen, oxygen, and nitrogen
d) argon, helium, and neon

Answers

Answer:

the correct answer is D

The answer would be D.
Hope this helps

Which of the following are signs of a chemical change/reaction? Select all that apply.

1. A change in mass.
2. A change in energy (hot, cold, light)
3. A change in volume.
4. A change in odor.
5. A change in color.
6.A change in phase/state.
7. Boiling.
8.Melting.
9. Freezing.

Answers

Answer:

the answers are

Explanation:

5,6,7,8&9.

Cube has a mass of 15g and the volume is 30cm what’s its density

Answers

Density = mass divided by volume. 15/30 is 1/2 so the density is 1/2 or 0.5 g/cm

Which statement describes an energy measurement?
A. An object travels 14 m.
O B. A car has a mass of 1,250 kg.
C. A rocket travels at 11 m/s.
D. Burning natural gas releases
21,000 kJ.

Answers

Answer:

D)a burning natural gas releases 21,000 kj


If 10 milliliters of liquid has a mass of 70 grams, what is its density?
O 7 g/mL
70 g/mL
0.7 g/mL
700 g/mL

Answers

Answer:

The answer is 7 g/mL

Explanation:

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

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

From the question

mass = 70 g

volume = 10 mL

We have

[tex]density = \frac{70}{10} \\ [/tex]

We have the final answer as

7 g/mL

Hope this helps you

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