Answer:
Combustion as an Exothermic Reaction
Explanation:
When substances burn, they usually give off energy as heat and light. The combustion of wood is an exothermic reaction that releases a lot of energy as heat and light.
Answer:
Exothermic
Explanation:
because exothermic causes fires while endothermic doesn't
A researcher is trying to identify whether household
substances are basic. Which approach would BEST help
the researcher investigate whether substances are
basic?
O A. Test each substance with blue litmus paper.
a
B. Test each substance with red litmus paper.
O
C. Mix each substance with a weak base and record the
results.
o
D.. Observe each substance and record its color.
CH4+202>CO2+2H2O ; How many grams of water are produced from 30.0g of oxygen? PLS HELP AND SHOW WORK!!!!
hi can someone please help me answer this the question is in pictures
Who elects or appoints Representative and Senators?
(Marking brainliest for the quickest correct answer!)
1) the president
2) the electoral college
3) The people
Answer:
3) The People
Explanation:
Members Of Congress In Both Houses ( Democrats And Republicans ) Are Elected By Direct Popular Vote. Senators Are Elected Via A Statewide Vote ( The People All Around The World ) And Representatives Are Elected By Voters In Each Congressional District.
The reason Senators are in office for 6 years is....(pick one of the following)
1) To separate Senators from the whims of the
general public.
2) to save money in elections
3) Because Senators are
required to be older
than representatives
Question of the day
Seeds obtain their energy (food) directly from the soil as soon as they are planted.
True or False?
Answer:
false
Explanation:
it gets nourishment from the storage tissues in the seeds, when it develops into a young plant with roots, then it takes nutrients from the soil
Which ionization process requires the most energy? which ionization process requires the most energy? f(g) → f +(g) + e- o(g) → o +(g) + e- f +(g) → f 2+(g) + e- o +(g) → o 2+(g) + e-?
*Urgent*
A balloon has a volume of 31.8 L at a temperature of 46 degrees C. What is the new temperature
of the balloon in degrees C if the volume is changed to 49.2 liters?
Round answers to 0.1 decimals
Answer:
The new volume will be
0.7 L
Explanation:
This is an illustration of Charles' law, some of the time called the temperature-volume law. It expresses that the volume of a gas is straightforwardly corresponding to the Kelvin temperature, while pressing factor and sum are held steady. The condition is V 1 T 1 = V 2 T 2 , where V is volume and T is temperature in Kelvins. Known V 1 = 0.5 L T 1 = 20 ∘ C + 273.15 = 293 K T 2 = 150 ∘ C + 273.15 = 423 K Obscure V 2 Arrangement Revise the condition to confine V 2 . Substitute the known qualities into the condition and address. V 2 = V 1 T 2 T 1 V 2 = ( 0.5 L × 423 K ) 293 K = 0.7 L adjusted to one huge figure
how does the water cycle sustains life
plz help! !!
Water is constantly being cycled between the atmosphere, the ocean and the land. This cycling is a very important process that helps sustain life on Earth. When the sun heats water, the water evaporates or changes to water vapor. Water vapor rises and condenses or changes back into liquid water droplets.
Can y’all help me with this
Identify the pair in whic 1 the formula does not match the name
sulfite, SO32
nitrite, NO3-
hydroxide, OB
dichromate, C 20-2
Answer:
hydroxide is the one because it is the one HAHAH
Answer:
hydroxide, OB
Explanation:
hydroxide,OB
Which on is right O& Mg?
OMG
MgO
Mg2O2
Mg+2O-2
Answer:
MgO
is the correct answer
hope it helps
What is the normality of a 2.0 M NaOH solution?
Answer:
Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0
Explanation:
I had the same question on one of my assignments earlier
Name the following compound: C2Cl6
the movement of carbon between the atmosphere, land, and ocean is called what?
Food chains always begin with what type of organism? Why?
Calculate the molar mass
Answer:
52
Explanation:
What is tugror pressure ,what causes it,and what does it do for a plant?
Answer:
Explanation:
Turgor pressure is the pressure forced or in other words, exerted onto the cell wall of the plant. It's caused by the movement of water into the cell. This causes the water to rush and burst into the cell, which increases the pressure onto the cell wall. Due to that, cell swells up, which helping the plant to stand upright and straight.
Hope this helps
Answer:
Turgor pressure is the pressure exerted on the cell wall of a plant. It is caused by the movement of water into the cell. ... This causes water to rush into the cell, increasing the pressure on the cell wall. The cell swells up, helping the plant to stand upright.
what is the Ka of a 0.0592 M solution of hydrofluoric acid (HF) with a pH of 6.90
Answer:
2.7*10^-13
coefficient= 2.7
exponent= -13
Explanation:
Answer: 2.7 x 10^-13
Explanation:
Neon in a piston is compressed to a volume of 14L its original volume was 22 L at 11.2 atm find the new pressure in atm
What important ingredients do you need to create a fertilized egg
Answer:
In the 1970s, Epel and other researchers showed that calcium is the essential factor that sparks development in eggs. As calcium levels rise, metabolic changes occur that cause the egg to divide and form into an embryo.
Explanation:
A gas is collected at 30 Celsius and has a pressure of 200 kPa. What pressure would it exert if the temperature changed to 40 Celsius?
Answer:
[tex]206.6\ \text{kPa}[/tex]
Explanation:
[tex]P_1[/tex] = Initial pressure = 200 kPa
[tex]P_2[/tex] = Final pressure
[tex]T_1[/tex] = Initial temperature = [tex]30^{\circ}\text{C}[/tex]
[tex]T_2[/tex] = Final temperature = [tex]40^{\circ}\text{C}[/tex]
We have the relation
[tex]\dfrac{P_2}{P_1}=\dfrac{T_2}{T_1}\\\Rightarrow P_2=\dfrac{T_2}{T_1}P_1\\\Rightarrow P_2=\dfrac{40+273.15}{30+273.15}\times 200\\\Rightarrow P_2=206.6\ \text{kPa}[/tex]
The pressure that would be exerted after the temperature change is [tex]206.6\ \text{kPa}[/tex].
MRI machines use extremely strong magnetic fields. These fields must be adjustable to produce high-quality images. What might these
machines use to generate such a field?
A
electromagnets
B
permanent magnets
C
induced current
PLEASE HELP ASAP NO LINKS PLEASE
What is the force that keeps the planets in perfect orbit around the sun?
A) Velocity
B) Gravity
C) Centrifugal Force
D) Magnetism
Answer:
gravity
Explanation:
Gravity is the force that pulls us to the surface of the Earth, keeps the planets in orbit around the Sun and causes the formation of planets, stars and galaxies.
Hope this helped!!!
Anyone know the answer to this?
How many molecules are in 6.20 moles of CaCO3?
1 mole is equal to 1 moles CaCO3, or 100.0869 grams.
What is mole?A mole is just a measuring scale. In reality, it's one of the International System of Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created.
The mole is a SI unit that is used to quantify any quantity of a substance. The word "mole" is shortened to "mol".
A mole consists of precisely 6.022140761023 particles. The "particles" could be anything, from tiny things like electrons or atoms to enormous things like stars or elephants.
Therefore, 1 mole is equal to 1 moles CaCO3, or 100.0869 grams.
To learn more about moles, refer to the link:
https://brainly.com/question/26416088
#SPJ2
acrostic words or phrases that describe street dance
Please Help me with number 4 I really need help please just tell me which letter is
Answer:
4. D
Explanation:
Matter can exist in three states namely: solid, gas and liquid. These three states are individually unique because they possess different properties or characteristics. Matter consists of particles, which behave differently in the different states.
Particles of a liquid e.g water, ethanol etc. will move freely about in the container it is placed but in close contact with one another. This means that the particles move freely while still attached to one another. This accounts for the reason liquids are said to FLOW.
How many atoms would be contained in 454 grams of iron?
Answer:
4.90 x 10 24 atoms
Explanation:
the 24 is the exponent for the 10
the charge of the atom is
Answer:
the charge of an atom is zero.
Explanation:
i hope this is what you were asking for.