solve for x . 4x-300=-8×
Answer:
4x+8x=30
12x=300
x=300/12
x=25
True or False
A sphere is a group of parts that work together as a whole.
False is the correct answer.
You are going to heat up some soup. The first thing you need to do is turn off the natural-gas (methane) stove. When you ignite a natural-gas stove, methane (CH4) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water vapor (H2O).
Required:
a. Write a balanced equation for this reaction. Be sure to show your work.
b. What type of reaction is this? Describe the common reactants and products for this type of reaction.
Answer:
CH4 + 2O2 --> CO2 2H2O, Combustion Reaction
Explanation:
PLS HELP Quick!!!!!!!!!
Answer:
Bailee is incorrect. The mass of objects stay the same but the weight will change.
Explanation:
Mass is how much space something takes up, so that wouldn't change on the moon. The weight however would change because the gravitational pull on the earth is different from that on the moon.
I hope this helps!
Bailee explained that when traveling to the moon. The statement of Bailee is incorrect. The mass of the objects stays the same, but the weight will change. The correct option is B.
What is gravity?Gravity is a force that pulls all objects towards itself. It is present on the earth and in the galaxy. Gravity is the cause of all planets, and the sun and the moon stay in their own places.
The weight of items on the moon is equal to their weight on Earth, according to Bailee, thus he needs only bring a small amount of luggage. The mass is the quantity of matter. The mass never changes, only the weight changes of an object when they are on different planets.
Thus, the correct option is B. The mass of the objects stays the same, but the weight will change.
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If squares represent carbon and spheres represent chlorine make a representation of liquid CCl4
Answer:
Look in explanation
Explanation:
I have shown the Lewis diagram as well as the square and sphere representation.
a 2.00 mL sample of a substance A has a density of 18.4g/mL and a 5.00 mL sample of substance B has a density of 35.5g/mL. do you have an equal mass of substances A and b?
this question made my brain hurt. please explain :(
Answer:
no
Explanation:
make use of this formula to find the mass of each sample.
m=density*volume
9. SI base units used in chemistry include
A. kilograms, liters, inches, and moles.
B. pounds, gallons, moles, and Fahrenheit.
C. kilograms, seconds, moles, and Kelvin.
D. pounds, gallons, moles, and Celsius.
Answer:
C. kilograms, seconds, moles, and Kelvin
4(a) Why doesn't the water flow out when the hand that presses the cardboard is removed? *
1. water inside glass is lighter
2. there is much water inside the glass
3. cardboard is supported by air pressure
4.
cardboard is strong enough to hold the water
The unknown metal ion gave a yellow/orange flame test and no precipitate with ammonium carbonate. What is the unknown metal?
Answer:
Sodium
Explanation:
How many molecules are their in o.5 mole of H2o
Answer:
There are 6.022x10^23 molecules
Al(s) + NaOH(aq) → Al(OH)3(s) + Na+(aq) displacement, or decomposition.
Answer:
Displacement
Explanation:
OH- in the reactant side of the reaction has switched from Na+ to Al 3+ in the product side. Decomposition is where a compound from the reactant side of the reaction would dissolve into elements in the product side, but that's not the case in this example.
how can you use terms such as thermal energy, particles, motion, and flow to explain the movement of heat in our world
Answer: Thermal energy is the kinetic energy of particles and heat is the term used to describe how this energy may flow to other systems, such as in a radiator.
Explanation: Molecules have a level of kinetic energy that can be measured by temperature. Higher temperatures result in more rapid and frequent collisons of particles in motion. Heat is the term used to measure the quantity of vibration energy in a given system. The SI unit for heat energy is the Joule. The water molecules in a pot of boiling water have a kinetic energy sufficient for them to break away from other water molecules and become gaseous (boiling point). The heat energy in 1 liter of water at 95C can be calculated in terms of Joules/liter, based on the specific heat of water (e.g., in units of J/gC). This heat can flow to other systems. A home boiler heater unit heats water tha can be pumped around the house ehre it will flow from radiators into thje surrounding air.
Heat is the word used to explain how this energy may transfer to other systems, such as in a radiator, and thermal energy is the kinetic energy of particles.
What is thermal energy?
By virtue of its temperature, a system in a condition of thermodynamic equilibrium has thermal energy or internal energy. Unlike the energy of systems that are not in a state of thermodynamic equilibrium, thermal energy cannot be transformed into meaningful work as quickly.
For instance, the same fluid or solid in a thermodynamic equilibrium state with the same energy (as thermal energy) cannot do work unless it is combined with another substance at a different temperature, as in a heat engine. However, the same fluid or solid in a moving state with the same energy (as mechanical energy) can be converted to work in some mechanical device, such as a windmill or a waterwheel.
Therefore, heat is the word used to explain how this energy may transfer to other systems, such as in a radiator, and thermal energy is the kinetic energy of particles.
Read more about thermal energy, here
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How would life be different without penicillin
Answer:
Without new antibiotics, common infections and minor injuries could become life-threatening and major surgeries and chemotherapy impossible because the treatments we have been using for years are no longer effective.
plz help!!
fill in the blank
Answer:
0.0325m = 3.25 cm
Explanation:
1m = 10-²cm
Answer:
3.25cm
Explanation:
a centimeter is just 1/100 of a meter
In the adjoining figure, the circles with the + sign represent protons and the empty circles represent neutrons. Determine which atoms in the figure are isotopes of each other.
Answer:
2 and 3 explanation in the comments
describe five factors which affect propagation of sound.. please describe in details.
Answer:
Explanation:
Image result for describe five factors which affect propagation of sound.. please describe in details.
There are several important factors which affect the propagation of sound: geometric spreading, atmospheric effects, and surface effects. These are discussed separately below. This refers to the spreading of sound energy as a result of the expansion of the wavefronts.
Filtration is the most appropriate method for separating a solution of water and which substance?
A. alcohol
B. salt
C. sand
D. sugar
Answer:
Sand
Explanation:
If you get salt or sugar in your water, you have to legit desalinate it to get the water and item out. You need to evaporate the water by increasing temperature and then lower temperature to separate the substances.
If you have alcohol, you need to distill it by trapping it and stuff.
With sand, the molecules are much larger which lets you separate the substances easily.
For example, on a beach, you can slap a handful of sand in your pail, but the sand sinks to the bottom right? You can just pour out the water.
Please help thank you (15 points)
Answer:
A. Complete one revolution around the sun
Nonmetallic materials that are strong, brittle, resistant to heat and attack by chemicals, and are typically made from clay are known as:________
D
Question 3
1 pts
In olden times, apothecaries used to dispense medicine using their own system of measurements
that are listed below. Use these conversions to determine how many milligrams would be in a
sample of 1.250 scruples.
1 apothecary pound = 12 ounces
1 ounce = 8 drams
3 scruples = 1 dram
1.2153 apothecary pound = 1 English pound
1 kg = 2.205 English pounds
Enter your answer to the correct number of significant digits. Do not include the units.
Changing 1.250 scruples to milligrams.
To convert from a unit to another, First write the conversion guide
then cross multiply in such a way that the unit both top and bottom
cancel out each other together with dividing or multiplying the values associated with them.
To get to the answer we have to wor it out step by step.
First step
3 scruples = 1 dram
1.250 scruples=
= [tex]\frac{1.250 scruples x 1 dram}{3scruples}[/tex] = 0.41667dram
2nd step
8 drams=1 ounce
0.41667drams =
[tex]\frac{0.41667drams x 1}{8 drams }[/tex] =0.05208 ounces
3rd step
1 apothecary pound = 12 ounces
?apothecary pound =0.05208 ounces
[tex]\frac{0.05208 ounces x 1apothecary pound }{12 ounces}[/tex] =0.00434 apothecary pound
4th step
1.2153 apothecary pound = 1 English pound
0.00434 apothecary pound =
[tex]\frac{0.00434 apothecary pound x 1 English pound}{1.2153 apothecary pound }[/tex]
==0.003571 English pound
5th step
1 kg = 2.205 English pounds
??kg =0.003571 English pound
[tex]\frac{0.003571 English pound x 1kg }{2.205 English pounds}[/tex]
=0.00161950kg
6th step
1kg =0.00161950kg
0.00161950kg=
[tex]\frac{0.00161950kg x 0.00161950kg}{1kg}[/tex]
=1,619.50mg
Therefore, 1.250 scruples=1,619.50mg
See related type of question here:
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please help me with this question i put 100 points on it and i will give brainlyest no links or files or i will report
The Earth’s tilt changes its position relative to the stars and constellations as the Earth rotates around its axis.
Outline the steps involved in the synthesis of 4-bromo-3-nitro-phenol from 4-bromobenzoic acid.
Answer:
[tex]4 - bromobenzoic \: acid \\ ↓ \\ { \tt{ \{soda \: lime \: and \: calcium \: oxide}} \\ { \tt{and \: heat \}}} \\ ↓ \\ 4 - bromobenzene \\ ↓ \\ { \tt{ \{chlorine \: and \: aluminium \: chloride \}}} \\ ↓ \\ 4 - bromo - 2 - chlorobenzene \\ ↓ \\ { \tt{ \{water \: and \: sodium \: hydroxide \}}} \\ ↓ \\ 4 - bromophenol \\ ↓ \\ { \tt{ \{conc.nitric \: acid \: at \: 60 \degree c}} \\ { \tt{and \: sulphuric \: acid \}}} \\ ↓ \\ 4 - bromo - 3 - nitrophenol[/tex]
In brackets, are the reagents
Which direction does heat flow from
Answer:
A
Explanation:
hot to cold; jus took the quiz;)
Question
"Drag each tile to the correct location on the concept map", for the question.
Read the instructions for this self-checked activity. Respond to each question, and check your answers. At the end of the activity, write a brief
evaluation of your work.
Answer:
i hope this helps, also you might want to put it into your own words because this was directly from the answer key :)
Explanation:
Faustus Faustus is the protagonist of the play. He is a brilliant scholar who makes a deal with Lucifer to exchange his soul for magical power. He later regrets his decision, but it’s too late and his soul is carried away to hell.
Mephastophilis Mephastophilis is a demon that Faustus calls upon to help him with magic. He turns into Faustus's servant in his pact with the devil.
Valdes and Cornelius Valdes and Cornelius are friends of Faustus who teach him the art of black magic.
three scholars The three scholars are friends of Faustus who are concerned about his welfare.
Lucifer Lucifer (the devil) is Mephastophilis’s master. He makes a deal with Faustus.
Wagner Wagner is Faustus’s servant. He learns how to work magic from his master’s books.
clown The clown becomes Wagner's servant. He provides comic relief in the story.
good angel The good angel is a spirit that tries to get Faustus to repent.
evil angel The evil angel is a spirit that tempts Faustus to rebel against God and make a pact with the devil.
the pope The pope is the head of the Roman Catholic Church and symbolizes the religious beliefs that Faustus has abandoned.
horse-courser The horse-courser is a horse trader who purchases a horse from Faustus.
old man The old man is a mysterious figure who takes the place of the good and evil angels in the last scene of the play.
Which of the following statements best defines the actual yield of a reaction? (5 points)
Select one:
a.The amount of product measured after a reaction
b.The ratio of measured yield over theoretical yield
c.The maximum amount of product that can be obtained Incorrect
d.The ratio of measured yield over stoichiometric yield
Answer:
its d
. . . . . . . .. . . . . . . . .. .
Which is an example of a three
dimensional measurement of
volume?
A. 120 cubic meters
B. 120 grams
C. 120 miles per hour
D. 120 units
Answer:
It's A. 120 cubic meters
calculate the number of moles in 2.5 particle NaOH
Answer:
1.5055×10²⁴
Explanation:
................................
Stowing items and come across an aerosol battle of hairspray what should you do?
You are stowing items and come across an aerosol bottle of hairspray. W should you do? Please choose all that apply. Stow the hairspray Raise an Andon Remove it and secure it with bubble wrap Place a Flammable sticker on the bottle Submit
Are ALL acids and based
harmful to humans?
What is kaleidoscope? Write it's use .
Answer:
Kaleidoscope is an optical toy consisting of two mirrors at a particular angle. Some common uses of the kaleidoscope are: Kaleidoscope produces beautiful patterns that are used by fashion designers. A kaleidoscope is used as a toy for entertainment.
Hope it's helpful