Chemistry High School

In this experiment, you made observations of the ______
and the ____
You used these observations to write the ____

Answers

Answer 1

In this experiment, you made observations of the reactant and the product.

You used these observations to write the balanced chemical equation.

What is chemical equation?

The symbolic representation of chemical reaction is called chemical equation.The chemical equation should be balanced.

To learn more about chemical equation here.

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Answer 2

Answer:

{first part} reactants, products, balanced chemical equation, classify the reaction

{second part} color change, formation of a gas, formation of a solid

Explanation:

edg 23'

Related Questions

The atomic size of zirconium is smaller than
a. niobium
b. Yttrium
c. Molybdenum
d. None of the above

Answers

Answer:

b

Explanation:

because hahamaskdjdjskskskskkssksksks

The sound made by crickets occurs when the male crickets rubs its two hind legs together. Which type of energy transformation results in the sound made by crickets?
A.sound energy to thermal energy
B.thermal energy to chemical energy
C.mechanical energy to sound energy
D.mechanical energy to chemical energy

Answers

Answer:

You can simply use process of elimination to find your answer. The only option that results in SOUND energy is C. Therefor your answer would be C.

Explanation:

<3

The rubbing of the hind legs by crickets converts the mechanical energy to sound energy. Thus, option C is correct.

Crickets have been the nocturnal animals that sleep in the daytime and were awake at the night. The crickets have been consisted of the front limbs and hind limbs with a pair of wings that support them to fly.

The crickets make the sound by the rubbing of the legs, thereby creating the vibrational sounds that have been sound energy.

The rubbing of legs has been utilized as the mechanical energy or the energy of doing work. The mechanical energy has been converted to the vibrational energy that contributes to the energy of the sound waves, thereby the sound energy.

Thus, the rubbing of the hind legs by crickets converts the mechanical energy to sound energy. Thus, option C is correct.

For more information about the energy transformation, refer to the link:

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Nitrogen (N) and hydrogen (H) react with each other to produce ammonia (NH3). This reaction is shown in an equation as N2 + 3H2 → 2NH3. What is the ratio of nitrogen atoms to hydrogen atoms in ammonia?

Answers

Answer:

the ratio is 1:3

Explanation:

you must find it

Help with stochiometry asap

Answers

For every 2 Mol NaOH you would get 1 Mol N2H4

Sand is composed of silicon dioxide SiO2. A 210 gram sample has how many moles?

Answers

To convert grams to moles you must divide by the molar mass of the molecule
SiO2 molar mass=60.083
210/60.083=3.495
This sample has 3.495 moles of SiO2

The number of moles of  210 gram sample of sand contains 3.5 moles of mole of SiO₂

Sand is composed of silicon dioxide (SiO₂).

Therefore, let's calculate the molecular mass of SiO₂ . Therefore,

Molecular mass of SiO₂

The molecular mass of the compound is the sum of the atomic mass of the compound.

SiO₂ = 32 + (16 × 2) = 28 + 32 = 60 g/mol

Therefore,

60 g  = 1 mole of SiO₂

210 g = ?

cross multiply

number of moles = 210 / 60

number of moles = 21 / 6

number of moles = 3.5 moles

learn more on moles here:https://brainly.com/question/4816100

Pls help I need help with this ..

Answers

Answer:

iTS FLIPPED

Explanation:

Answer:

i don't know sorry so lets be friends

I am worried about your proposal to install a groundwater heating system in my daughter’s school.

I don’t think that water at a temperature of 30°C has enough energy to heat the school. If the school is too cold, the students won’t be able to focus on learning.
Respond to David Li’s letter. Explain how the groundwater system could heat the air in the school.

Answers

Answer: The temperature would increase assuming it is 30 degree water causing a change in the temperature and assuming it is a seismic groundwater source you are using the earths core to heat the school so it would likely be a stable energy source. There are very few places on the planet where that warm of water is accessible without drilling really deep into the core but if it is there and is a stable fault then the energy would be consistent and stable.

The groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.

Groundwater heating system:

Although the temperature of the ground water is not much but the amount of groundwater is too much.

This large amount water slowly releases heat energy which is transferred in the ambient atmosphere of school.

Therefore, the groundwater system can heat the air in the school by transferring the heat in the ambient atmosphere of school.

To know more about groundwater heating system,

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When KCL dissolved in ethanol, what is the intermolecular attraction between K+ ions and ethanol molecules?

Answers

Answer: Ion-Dipole

Explanation: I took the CK-12 practice and got it right

When KCL dissolved in ethanol, the intermolecular attraction between K+ ions and ethanol molecules is ion - dipole interaction.

What is an ion dipole interaction ?

The term ion-dipole interaction is defined as the intermolecular force of attraction between cation or anion and a molecule. It is present in the solution where ionic compounds dissolve in polar solvents.

Due to the polar O-H group's presence in the molecule, ethanol is a polar substance. Thus, the molecule has a dipole moment. The dipole's positive end rests on hydrogen, and its negative end rests on oxygen.

K+ ions can interact with the ethanol's negative end of the dipole through ion-dipole interaction when KCl is dissolved in the alcohol.

Thus, When KCL dissolved in ethanol, the intermolecular attraction between K+ ions and ethanol molecules is ion - dipole interaction.

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The diagram represents liquid water in a pan on a hot plate. The liquid water is boiling and changing into water vapor. The process of boiling water is considered to be a

Answers

Answer:

Physical change

Explanation:

The molecules are being rearranged as the water changes phases from liquid to gas, but this doesn't change the chemical structure of the water.

The Milky Way Galaxy is made up of billions of stars. Which of the following best describes the shape of the Milky Way Galaxy
OA. a sphere
OB. a pyramid
C a spiral
OD
a cube

Answers

The answer is a sphere is the answer

Answer:

It's spiral for any of my study island people.

Explanation:

what are the resulting elements and compounds of a chemical reaction called?

i need the answer in 2 minutes.

Answers

Answer:these starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products

Explanation:I hope this helps

Plz help how do I predict the shape of the molecule for GaBr3

Answers

Explanation:

GaBr3 is called gallium tribromide. It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

Answer:

GaBr3 is called gallium tribromide.

Explanation:

It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

Hope this helps! :)

What cell function produces offspring

Answers

Answer:Sexual reproduction produces offspring with novel combinations of genes

Explanation:

yes

certain conductor with a resistance of 10 Ohms is crossed by an electric current of intensity 100 mA. What is the potential difference at the terminals of that conductor?

Answers

Answer:

1.0 V

Explanation:

Step 1: Given data

Resistance of certain conductor (R): 10 ΩCurrent's intensity (I): 100 mAPotential difference at the terminals of that conductor (V): ?

Step 2: Convert "I" to Ampere

We will use the conversion factor 1 A = 1000 mA.

100 mA × 1 A/1000 mA = 0.100 A

Step 3: Calculate the potential difference

We will use Ohm's law.

V = I × R

V = 0.100 A × 10 Ω = 1.0 V

Which statement is false? a. A closed system does not interact with its surroundings. b. Matter and energy can be transformed in and out of a system c. Energy can be created or destroyed. d. If energy appears to be gained or lost, it has just changed into a different form

Answers

Statement C is false because the law of conservation of energy states that energy can never be created nor destroyed only changed in form

please answer 3 plzzzz

7th grade science

Answers

Answer:

Explanation:

Show us the picture, then we can help.

Energy in a chemical reaction can be identified as which of the following?

A.) Heat
B.) Light
C.) ∆H
D.) 2,000Kj
E.) All of the above

Answers

I believe it’s A..but I’m not quite sure.

particles are very ..........​

Answers

Answer:

pls comment if this helps

Explanation:

small this is because people  cant see them

H2SO3
What does this stand for?

Answers

Answer:

It means Sulfurous Acid

Explanation:

It stand for Sulfurous acid

Being able to curl your tongue is a recessive trait (t), while not being able to curl your tongue is a dominant trait (T).
Having curly hair is also a recessive trait (s), while having straight hair is a dominant trait (S).
Parent 1 can curl their tongue (tt) and also has straight hair (Ss). Parent 2 cannot curl their tongue (TT) and has
curly hair (ss). In your notebook, perform a dihybrid cross for these traits. Parent 1: ttSs Parent 2: TTSS
13
What are the Parent 1 gametes? (HINT: FOIL. There will be 4 genotypes)
14
What percent of offspring can curl tongue and have straight hair?
15
What percent of offspring cannot curl tongue and have curly hair?

Answers

should be this. you can’t have any of these listed below since they both rain recessive traits. recessive traits aren’t able to be created in the dihybrid. btw i did the simplified grid since they produce the same gametes. i could be wrong though (:

Which phrases describe the open-ocean zone? Check all that apply.

very little sunlight
few nutrients
low temperatures
low density
located near coasts

Answers

Answer:

- few nutrients

- low temperatures

-very little sunlight

Explanation:

Answer:

I think it's: located near coasts.

I WILL GIVE BRAINLIST!!!!!!!!!!!!!!!!!!!!!! PLZZZZZZZZZ HELPPPPPPPPPPPPPP


Explain how proper motion will affect the constellation as seen from the earth.

Answers

Proper motion describes how stars slowly drift in space and change their position in relation to the sun. Since stars have proper motion, over time, the patterns we see now in constellations will not be the same.

can you help me with this i don't think it is that hard i just have a lot on my mind.

Answers

Answer:

Global wind

Explanation:

The jet streams go around the whole earth from west to east

Hope you have a good day :)

80 foot-pounds of work is needed to move the sofa in Tyler's apartment. Which of the following statements is true?

Answers

The fact at you yes are

What is a function of the backbone in animals?
A. It protects against predators.
B. It regulates blood glucose.
C. It surround the spinal cord.
D. It limits movement.

Answers

Answer:

C - It surrounds the spinal cord.

Explanation:

Option A would be incorrect. Having a protective shell on an animal’s back would be one of the ways they would be protected against predators. And having a backbone wouldn’t really make a good shield against predators.

Option B is incorrect. The pancreas regulates blood glucose, not the backbone.

Option D would also be incorrect. It doesn’t limit movement unless it’s bent or positioned abnormally. Or unless it’s broken or malfunctioned.

The only option that is correct is option C. Hope it helps. ^^

What is the Molarity of 0.250 L of solution containing 4.32 g of magnesium
phosphide (Mg3P2)?

A. 0.128 M
B. 0.312 M
C. 1.13 M
D. 1.97 M

Answers

B.0312 ion know if it’s right

If the amount of energy required to break bonds in the reactants is more than the amount of energy released in forming bonds in the products, then the reaction will have a negative change in enthalpy (−ΔH). (2 points)
True
False

CH AT FOR THE WeebsRUs

Answers

Answer:

YASSSSSSS

Explanation:

i think the answer is true

4. When is it appropriate to use Roman numerals in naming compounds?

Answers

Answer:

Explanation:

Roman numerals are used in naming ionic compounds when the metal cation forms more than one ion.

What chemical burns red?

Answers

Answer:

Strontium chloride

Explanation:

get that W

Answer:

Strontium chloride or strontium nitrate

Explanation:

classify the reaction

Answers

Answer:

Synthesis reaction

Explanation:

2Hg+O2 ⇒ 2HgO is in the direction of off

Element + Other Element ⇒ Product

The conceptual model of a synthesis reaction is 2Hg+O2 ⇒ 2HgO

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