Chemistry High School

I need help please it is my last question and ill give brainy and all the points!

Answers

Answer 1

Answer:

its B

Explanation:

this is pretty obvious since I know about this and did it already.

I Hope this helps!

GOODLUCK!!!!!!!

Related Questions

3. How many meters long is a 360 inches long extension cord?

Answers

Answer:

9.144 meters.

Explanation: Formula: divide the length value by 39.37 , which yields 9.144.

Metamorphic rocks that show layers of dark minerals alternating with layers of light minerals are classified as ____.

Answers

i believe it’s foliated

are milliseconds or kilo seconds larger?

Answers

Answer:

kilo seconds

Explanation:

kilo prefix means it is large and . milli as small

The element aluminum has an atomic number of 13.
How many protons are in the nucleus of an aluminum atom?
How many electrons does an aluminun atom have?

Answers

Answer:

Aluminum has (by definition) 13 protons, 13 positively charged particles. Because aluminum is neutral (as is all matter), it therefore has 13 negatively charged particles, electrons

What determines how the atoms are organized on the periodic table of elements?

Answers

The periodic table of elements arranges all of the known chemical elements in an informative array. Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods.

If 150 grams of water is to be heated from 15.0°C to 100°C to make a cup of tea, how much heat must be added? The specific heat of water is 4.18 J/g°C

Answers

Answer:

53295 J or 53kJ

Explanation:

The specific heat of a substance is the amount of heat energy required to raise the temperature of a unit mass of a substance by one degree celsius.

The specific heat of water is 4.18 J/g°C. This means that to raise one gram of a sample of water by one degree celsius, 4.18 J of energy is required.

The heat energy (q), required to raise the temperature (ΔT) of a given substance, with a given mass (m) and specific heat capacity (c) is given by the formula;

q= m.c.ΔT

Substituting the data given into the formula, we will have,

q= 150g . 4.18 J/g°C . (100 - 15)°C

= 53295J

or 53kJ

A car emits 8.6 kg of CO2 per gallon of unleaded gas. How much CO2 is produced if the car 2.5 burns gal of fuel?

Answers

Answer:

2.5 gallon fuel produced 21.5 kg CO₂.

Explanation:

Given data:

CO₂ produced during burning of one gallon fuel = 8.6 kg

CO₂ produced during burning of 2.5 gallon fuel = ?

Solution:

This problem is solved through simple multiplication.

If one gallon fuel produced 8.6 kg CO₂ then 2.5 gallon produced is determined by multiplying the 2.5 with 8.6 kg.

1 gallon = 8.6 kg CO₂

2.5 × 8.6 kg CO₂ = 21.5 kg

Thus 2.5 gallon fuel produced 21.5 kg CO₂ .

64 ounces to liters in unit conversion form

Answers

Answer:

1.892 L. 64 fluid ounces = 1.892 liters (or L)

Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin scale?

The difference is .......... kelvin

Hiii
Help me pls.

Answers

Answer:

The difference is 293.15 Kelvin.

Explanation:

Given data:

Temperature difference of matter = 20°C

Temperature difference of matter in kelvin = ?

Solution;

Formula:

0°C +273.15

now we will put the values instead of 0.

20°C + 273.15 = 293.15 K

Thus, the temperature difference between two sample is 293.15 K.

What action-reaction forces are involved when a rocket engine fires?

Answers

The reaction force is the hot gas pushing back on the rocket propelling it into outer space. There is no need for air to push on because the hot gases produced by the rocket allow the action and reaction forces to operate.

(hope this helps ^^)

If an element’s atomic number is 15, how many electrons must it have in order to be neutral?

Answers

Answer:

Explanation:

atomic number is the same as protons so 15 protons and 15 electrons would be neutral

who discovered silver and how?

Answers

Answer:

Silver was discovered in Greece

Answer:

En 1516 Juan Díaz de Solís descubrió en Sudamérica el mar Dulce que posteriormente Sebastián Caboto denominó Río de la Plata, creyendo que allí abundaba el precioso metal, y de donde tomará el nombre la Argentina.

Explanation:

Please answer ASAP

How many moles of KBro3 are required to
prepare 0.0700 moles of Br2 according to the
given reaction?
KBrO3 + 5KBr + 6HNO3➡️6KNO3 + 3Br2 + 3H2O
A. 0.0233
C. 0.220
B. 0.210
D. 0.0704

Answers

Answer:

A. 0.0233

Explanation:

according to the equation,

no. of moles of KBrO3 : no. of moles of Br2 = 1 : 3

no. of moles of KBrO3

= ⅓ × 0.0700mol

= 0.0233 (3 sig. fig.)

The moles of KBrO₃ are required to prepare 0.0700 moles of Br₂ according to the given reaction is 0.023 moles.

What is the stoichiometry?

Stoichiometry of the reaction gives idea about the amount of entities present before and after the completion of chemical reaction.

Given balanced chemical reaction is:
KBrO₃ + 5KBr + 6HNO₃ → ️6KNO₃ + 3Br₂ + 3H₂O

From the stoichiometry of the reaction, it is clear that:
3 moles of Br₂ = produced from 1 mole of KBrO₃

0.07 moles of Br₂ = produced from 1/3×0.07=0.023 moles of KBrO₃

Hence required moles of KBrO₃ is 0.023 moles.

To know more about stoichiometry, visit the below link:
https://brainly.com/question/24892067

In which of the following states of matter are the particles very far apart and
move freely?
O solids only
O solids and liquids only
O solids, liquids, and gases
O gases only

Answers

Answer:

Gas

Explanation:

In a gas, particles are in consistent straight-line movement. The motor energy of the atom is more prominent than the alluring power between them, hence they are a lot farther separated and move unreservedly of one another.

Answer: Gases only

Explanation: because there are gas all around us. You can walk though the air with slamming into it like its a brick wall. that's because the particles are far apart allowing it to move freely.

Hopefully this helps.

Select all answers that are correct.

George Washington Carver received _____ from God during early morning walks in the woods.

guidance
inspiration
finances
solutions

Answers

Answer:

inspiration

Explanation:

The answer is Inspiration

Does Arsenic have a high or low ionization energy in comparison to Carbon? Explain why using the concepts of the structure of the atom

Answers

Arsenic has a low ionization energy compared to carbon. Ionization energy is the energy required to take away an electron. Arsenic has more many electrons than carbon, meaning it has more electrons farther from the nucleus, so it is easier to take one.

Find the number of moles of 452 g of Iodine.

Answers

Answer:

3.5617342714563267

Explanation:

which of the following statement best describes metamorphosis

Answers

Answer:

Process of rock formations

Explanation:

What is the mass of 2.591 × 10^8 mol S
Answer in units of g

Answers

Answer: The answer is 18.01528.

I assume you are converting between grams H2O and mole.1 grams H2O is equal to 0.055508435061792 mole.

Explanation:

define relative velocity with an example

Answers

Answer:

For example, you are in a bus and it goes with the velocity of 50 m/s to the east, then a truck passes you with a velocity of 60m/s to the east. ... Velocity of the moving objects with respect to other moving or stationary object is called “relative velocity” and this motion is called “relative motion”

ctto.

1.) Decide if the following equation is always true, sometimes true, or never true.
2(x + 3)=5x + 6 - 3x
A) Always True
B) Sometimes True
C) Never true
Decide if the following equation is always true, sometime true, or never true.
2.) x - 3=2x - 3 - x
A) Always True
B) Sometimes True
C) Never True
PLEASE HELP!!!!!!

Answers

Explanation:

(1) The given equation is :

2(x + 3)=5x + 6 - 3x

Solving LHS first.

2(x + 3) = 2x +6

Solving RHS

5x + 6 - 3x = 2x+6

LHS = RHS

So, it is always true.

(2) The given equation is :

x - 3=2x - 3 - x

LHS = x - 3

Solving RHS

2x - 3 - x = x-3

LHS = RHS

So, it is always true.

How many fluorine atoms are there in 5 molecules of CH3FO?

Answers

i wanna say it’s 5 because in one molecule of CH3FO theres 1 fluorine so if we had 5 of those then there’d be 5

During the SI Scavenger Hunt Lab, a student measured her foot length using a meter stick and recorded it as 25 cm. However, at the shoe store, the sales staff measured the length of her foot to be 23.7 cm. If the shoe store’s measurement is accepted as correct, what is the percent error of her meter stick measurement?

Answers

Answer:

Percent error in meter stick measurement is 5.5%.

Explanation:

Given data:

Measured value = 25 cm

Accepted value = 23.7 cm

percent error = ?

Solution:

Subtract the accepted value from measured value divided by accepted value multiply by 100.

Formula:

(measured value - accepted value / accepted value ) × 100

Now we will put the values.

(25 cm - 23.7 cm/23.7 cm ) × 100

1.3 cm/23.7 cm ) × 100

0.055× 100

5.5%

Percent error in meter stick measurement is 5.5%.

FIRST ANSWER GETS CROWNED BRAINLIEST!!!!!!
A truckload of plastic soda bottles was finely shredded at a recycling center. The plastic shreds were placed into 55-liter drums. What it the mass of the plastic shreds inside one of the drums in kg? Assume lowest density within the range.

Answers

Answer:

75,900 g

Explanation:

m=d×v

(1.38g/cm^3) × (55,000)

which of the following models of the atom was supported by the gold experiment?

Answers

The Nuclear model was supported by the gold experiment.

is the minimum amount of material needed to sustain a nuclear reaction.

Answers

Answer:

critical mass

Explanation:

Answer:

critical mass

Explanation:

After hearing the siren, the student runs into her house and tells her mother there must have been an accident down the street.
She just made a(n).
A inference
B hypothesis
C observation
D prediction

Answers

Answer:

Explanation:

she inferred that was the end result.

Which explains one reason evaporation can be used to separate a mixture?
The desired component has a higher boiling point than the other components.
The desired component has a different density from the other components.
The mixture is a solution that contains a substance that will crystallize out.
The desired component has the smallest particles in the mixture.

Answers

Answer:

its the first one

Explanation:

if only one mixture boils the other will stay as the boiling one will evaporate

Answer:

The answer would be

A. The desired component has a higher boiling point than the other components.

Explanation:

Credits to the person above

Have a great day

A cube is 4 cm on each side. What is its volume?

Answer: 64cm^3

Answers

Answer:

yeah

Explanation:

Does a chemical reaction in a closed or open best supports the law of conservation of matter

Answers

Answer:

Normally, it explains that matter cannot be created or destroyed. It demonstrates different chemical reactions that help show the different transformations of the matter but will never destroy it or create it.

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