Answers
Na ->1
O ->1
H-> 1
Total->3
And so on
Related Questions
Two parent reproduction involves cell division that includes ___________? *
Meiosis
Fibrosis
Mitosis
Answers
Answer:
Mitosis
Explanation:
Which equation is balanced?
A. H 2 + O 2 → H 2O
B. 2Na + Cl 2 → 2NaCl
C. KClO 3 → KCl 2 + 3O 2
D. CH 4 + 2O 2 → CO 2 + H 2 O
Answers
Because in both sides (reactant and product) are:
Na= 2. Na=2
Cl=2 Cl=2
So this equation is balanced
Volcanic eruptions can be very dangerous for nearby human and animal populations. One danger is that lava and ash may bury habitats. What is another danger during a volcanic eruption?
A.
Lava or hot debris may start fires.
B.
Lava flows may cause tsunamis.
C.
Volcanic eruptions always cause flooding.
D.
Volcanic eruptions always cause high winds.
Answers
Answer:
B. Lava flows may cause tsunamis.
which contain more heat a cup of coffee or a glass of iced tea? thank you
Answers
Answer:
Relationship between heat and temperature
The water molecules in a cup of hot coffee have a higher average kinetic energy than the water molecules in a cup of iced tea, which also means they are moving at a higher velocity.
If 190dm of hydrogen gas collected at 20°c and 760mmHg .Calculate it's volume at stp (standard pressure=760mmHg
Answers
Answer:
177.1 L
Explanation:
The excersise can be solved, by the Ideal Gases Law.
P . V = n . R . T
In first step we need to determine the moles of gas:
We convert T° from, C° to K → 20°C + 273 = 293K
We convert P from mmHg to atm → 760 mmHg = 1atm
1Dm³ = 1L → 190L
We replace: 190 L . 1 atm = n . 0.082 . 293K
(190L.atm) / 0.082 . 293K = 7.91 moles.
We replace equation at STP conditions (1 atm and 273K)
V = (n . R .T) / P
V = (7.91 mol . 0.082 . 273K) / 1atm = 177.1 L
We can also make a rule of three:
At STP conditions 1 mol of gas occupies 22.4L
Then, 7.91 moles will be contained at (7.91 . 22.4) /1 = 177.1L
If 115grams of a substance reacts with 84grams of another substance, what will be the mass of the products after the reaction?
Answers
A sample of an unknown liquid has a volume of 12.0 mL and a mass of 6 g. What is its density?
A. 2 g/cm3
B. 0.5 g/cm
C. 5.0 g/cm3
D. 0.2 g/cm3
Answers
[tex]\large \mathfrak{Solution : }[/tex]
volume = 12 ml = 0.012 litres = 0.012 cm³
mass = 6 g
And the relationship between mass, volume and density can be depicted by :
[tex] \boxed{density = \dfrac{mass}{volume} }[/tex][tex]density = \dfrac{6}{0.012} [/tex][tex]density = \dfrac{6000}{12} [/tex][tex]density = 500 \: \: g/cm {}^{3} [/tex]therefore, density = 500 g/cm³
Guys help me
Please
Answers
Answer:
8.38×10raise to power 23
Explanation:
mass of sugar=density ×volume
=. 1.59g/ml×25ml=39.75
no. of miles= given mass/ molar mass
= 39.75/342.3g / mole
1 mole of sugar =C12 H22 O11
contains
12× 6.023 × 10 ∆23=72.28× 10∆ 23 ×6.023×10²³
= 8.38× 10²³
What processes contribute water to surface water sources?(science)
Answers
The Rockies and the Appalachians are two major mountain ranges in the United States. Which type of plate movement caused these mountain ranges to form?
a divergent
b oceanic
c convergent
d transform
Answers
Answer:
Poop
Explanation:
Answer:
convergergent
Explanation:
Mountains form where two continental plates collide. Since both plates have a similar thickness and weight, neither one will sink under the other. Instead, they crumple and fold until the rocks are forced up to form a mountain range. As the plates continue to collide, mountains will get taller and taller.
Explain why a climax community is not always a forest.
Answers
Which of the following can be used as lubricant
Answers
Answer:
Explanation:
B is the ans
pls mark BRAINLIEST
The following diagram shows a single cell. Is the cell eukaryotic or prokaryotic? Explain your reasoning
Answers
Answer:
eukaryotic because it has a nucleus
Explanation:
please help people! science science! thank you!
Answers
Answer:
A. Is your answer
All the other ones are not valid because they are lower to the ground and you wouldn't have enough MOMENTUM to put you up for the top of the star.
Hope this helps!
3. Infer Do all elements have half-lives? Why or why not?
Answers
Answer:
Elements with short half lives exist because each element has stable isotopes, and the decay os isotopes create more isotopes as well.
what is molarity of 3 mole of hydrochloric acid in 3L of water
Answers
Answer:
1
Explanation:
Molarity is simply defined as the mole of solute per unit litre of water. Mathematically, it can be expressed as:
[tex]Molarity = \frac{mole}{volume}[/tex]
With the above information in mind, we can obtain the molarity of the hydrochloric acid solution as follow:
Mole of HCl = 3 moles
Volume of water = 3 L
Molarity =?[tex]Molarity = \frac{mole}{volume}\\Molarity = \frac{3}{3}\\Molarity = 1 M[/tex]
Therefore, the molarity of the hydrochloric acid solution is 1 M.
Learn more: https://brainly.com/question/15012982
The graphic represents the Milky Way galaxy.
Which label best represents the location of our solar system within the milky way galaxy?
A
B
C
D
Answers
Answer:
planets,meteoroids and asteroids
Explanation:
A plastic bag containing 2.2 L of gas at
1.0 atm pressure is cooled from 30°C to
0 °C. What will be the volume of the gas?
Answers
Answer: The volume of the gas is 1.98 L.
Explanation:
To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,
[tex]\frac{V_1}{T_1}=\frac{V_2}{T_2}[/tex]
where,
[tex]V_1\text{ and }T_1[/tex] are the initial volume and temperature of the gas.
[tex]V_2\text{ and }T_2[/tex] are the final volume and temperature of the gas.
We are given:
[tex]V_1=2.2L\\T_1=30^oC=(30+273)K=303K\\V_2=?\\T_2=0^0C=(0+273)K=273K[/tex]
Putting values in above equation, we get:
[tex]\frac{2.2}{303}=\frac{V_2}{273}\\\\V_2=1.98L[/tex]
Thus the volume of the gas is 1.98 L
Which of the following processes occurs with a decreaseentropy of the system
Answers
Explanation: Entropy decreases when the number of moles of gas decreases during a reaction. In the case of the correct answer, the number of moles of gas decreases from two to one. When a substance goes from a solid to a gas (sublimation) or from a liquid to a gas (evaporation), entropy increases.
Calculate the number of grams of nitrogen dioxide that are produced from 4 moles of nitric oxide
Answers
Answer:
hope this help by the way found off of yahoo
Explanation:
Calculate the number of grams of nitrogen dioxide that are produced from
4 moles of nitric oxide.
2NO(g) + O2(g) -->2NO2(g)
I really need help with this... I need to know how to work it too... I can balance it out but not sure about grams... This is it balanced out with 4 moles of nitric oxide
4NO(g) + 2O2(g) ->4NO2(g) please help and explain i want to learn this
Ayúdenme por favor
Please help me
Answers
2H2+O2===>2H2O
N2+3H2==>2NH3
C3H8+5O2==>4H20+3CO2
CH4+2O2===>CO2+2H2O
2HBr +Fe==>FeBr2 +H2
I hope it helped
help asap i don’t understand at all lol
Answers
Answer:
a, to reduce air bubbles
Explanation:
all its asking, is what is the purpose of the cover. and a is the most reasonable out of all of them, even though none of them make any sense.
Which statement describes the solar feature shooting off into space labeled C?
An envelope of plasma surrounding the sun
A stream of glowing gas that shoots out from the sun in an arch
A brief eruption of intense high-energy radiation from the sun's surface
A dark spot appearing from time to time on the sun's surface
Answers
What is a type of radiation produced when the unstable nucleus of a radioactive element emits a helium nucleus?
A. deuterium radiation
B. beta radiation
C. alpha radiation
D. gamma radiation
Answers
help pls this is physical science (9th grade )
Answers
Answer:
mamamkalalllaamakkaoakmaa
2N2 + 502 --> 2N205
Based on the above reaction, if 7 moles of Ny react completely, how many moles of Oz must also react?
ASAP LOOK AT PICTURE
Answers
Answer:
wait are you talking about the bottom question??
1. Why do you think it is so important to think about momentum in the NASCAR world? Use the
equation for momentum (momentum = mass times velocity) in your answer. (Hint: NASCAR
drivers drive really fast.] 1 point
Answers
Answer:
because it is
Explanation:
simple
Answer:
Explanation: none
What is the molar mass of a sample of gas that has a density of 2.85g/L at 101kPa pressure
and 29°C? Name the law that is used to solve this problem.
Answers
Answer:71.25
Explanation:
The molar mass of a sample of gas that has a density of 2.85g/L at 101 kPa pressure and 29°C is 71.37 g mol⁻¹ and It can be solved using Ideal gas law.
What is Ideal gas law ?The ideal gas law is an equation of state that describes ideal gases.
This equation of state relates a gas’s pressure, volume, temperature, and mass, and is very useful for describing how gases will behave in ideal conditions.
This is the most common equation of state for gases.
Ideal Gas equation ;
PV = nRT
Molar mass (Mm) = m /n
Where ;
m = given massn = number of moleswe also know,
Density (D) = m / v
Where ;
m = massv = volumeNow, Putting the formula of Molar mass and Density in ideal gas equation we get ;
Molar mass = D RT/ P
Given ;
Density = 2.85 g/LPressure = 101kpa (= 0.99 atm)Temperature = 29°C (= 302.15 K)(Gas constant) R = 0.0821Putting all the values in the above equation of molar mass ;
Molar mass = 2.85 x 0.0821 x 302 / 0.99
= 71.37 g mol⁻¹
Learn more about Ideal gas law here ;
https://brainly.com/question/13821925
#SPJ2
WILL MARK BRAINLIEST FOR CORRECT ANSWER
Continue reading from Ruby Bridges’s autobiography.
We drove down North Galvez Street to the point where it crosses Alvar. I remember looking out of the car as we pulled up to the Frantz school. There were barricades and people shouting and policemen everywhere. I thought maybe it was Mardi Gras, the carnival that takes place in New Orleans every year. Mardi Gras was always noisy.
As we walked through the crowd, I didn’t see any faces. I guess that’s because I wasn’t very tall and I was surrounded by the marshals. People yelled and threw things. I could see the school building, and it looked bigger and nicer than my old school. When we climbed the high steps to the front door, there were policemen in uniforms at the top. The policemen at the door and the crowd behind us made me think this was an important place.
It must be college, I thought to myself.
–Through My Eyes,
Ruby Bridges
What evidence in the text supports the idea that Bridges did not realize the significance of her first day? Check all that apply.
“I remember looking out of the car as we pulled up to the Frantz school.”
“I thought maybe it was Mardi Gras.”
“As we walked through the crowd, I didn’t see any faces.”
“[The school] looked bigger and nicer than my old school.”
“The crowd behind us made me think this was an important place.”
“It must be college, I thought to myself.”
Answers
Answer: I remember looking out of the car as we pulled up to the Frantz school.”
“I thought maybe it was Mardi Gras.”
“As we walked through the crowd, I didn’t see any faces.”
“[The school] looked bigger and nicer than my old school.”
“The crowd behind us made me think this was an important place.”
“It must be college, I thought to myself.
Explanation:
“I thought maybe it was Mardi Gras.”
“[The school] looked bigger and nicer than my old school.”
“It must be college, I thought to myself.”
Calculate the percentage composition of sugar, C12H22011.
Answers
Answer:
%C= 42.1
%H=6.5
%O=51.4
Explanation:
Mass%=(mass/total)× 100%