Answer:
All in All, All in All.
Explanation:
HOW MANY MOLES OF CS2 FORMS WHEN 2.7 MOLE C REACTS
A___
is a
small, rocky object
that orbits the sun
and has broken
off from a comet
or asteroid.
(Fill in the blank)
Answer:
I think it is a rock...
Explanation:
maybe idrk tho
What is the name for the compound with a chemical formula B6Si.
The chemical formula B₆Si belongs to the compound silicon hexaboride.
how many moles of lithium are in 18.2 grams of lithium
Answer:
I think 2.6 sorry if its wrong
The number of moles of 18.3 grams of lithium is equal to 2.62 mol.
What is a mole?A mole can be defined as a metric unit that is used to evaluate a count of particles in the sample of a given substance. The particles counted are generally identical chemical entities, but they are individually distinct.
A mole is used for a large number of quantities of molecules, atoms, ions, or other specific particles. The number of chemical compounds or elements can be measured in the terms of moles.
The number of units of the chemical which are present in 1 mole is equal to 6.023 × 10 ²³ refers to Avogadro’s constant.
Given, the mass of lithium in the sample = 18.2 g
The mass of one mole of lithium = 6.94 g
6.94 grams of lithium has moles = 1 mol
18.2 g of lithium has moles of Li = 18.2/6.94 = 2.62 mol
Therefore, the moles in 18.2 g of Lithium is 2.62 mol.
Learn more about the mole, here:
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PLEASE HELP Describe at least two advantages and two disadvantages of using hydropower as a
source of energy.
PLS ONLY ANSWER THE FULL QUESTION ON HERE DO NOT SEND A LINK FOR ME TO CLICK!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Advantage: Hydropower is a fueled by water, so it's a clean fuel source.
Advantage: It is a domestic source of energy in the US.
Disadvantage: Fish populations can be impacted if fish cannot migrate upstream past impoundment dams to spawning grounds or if they cannot migrate downstream to the ocean.
Disadvantage: Hydropower plants can be impacted by drought. When water is not available, the hydropower plants can't produce electricity.
Explanation:
If anyone has done the edge acids and bases lab please help me it would be deeply appreciated
Answer:
Do you mean a biology lab
Explanation:
what's the question
What does putting on the sweater, even though it isn’t hers, reveal about Rachel?
She sticks up for herself when she knows she is right.
She will do what she is told, especially when facing conflict.
She can be talked into liking something that she does not like.
Answer:
B: She will do what she is told, especially when facing conflict
Explanation:
I know it cause I'm doing it rn and I got it right
Please someone answer this asap
Answer:
b or c but I would just pick c
Answer:
C
Explanation:
Sun is an energy source not a matter.
What are all of the mole ratios of MgCl2 -> Mg+ Cl2
Answer:
2 moles
In words, 1 mole of Mg reacts with 2 moles of HCl to form 1 mole of MgCl₂ and 1 mole of H₂. The molar ratio of HCl to MgCl₂ is 2:1.
A sample of polonium-210 has an initial mass of 390 milligrams (mg). If the half-life of polonium-210 is 36 days, how many mg of the sample remains after 72 days?
A.
392 mg
B.
195 mg
C.
97.5 mg
D.
48.75 mg
Answer: D. 48.75
Explanation: just took the test
Answer:
D
Explanation:
I got this question right on my test.
1 point
Marlene sits in a roller coaster that is at the top of a 72 m hill. Marlene and
the rollercoaster have a combined mass of 120 kg. Calculate the energy.
829,785 J
311,080J
84,672 J
O 42,336 J
Answer:
84672 J
Explanation:
From the question given above, the following data were obtained:
Height (h) = 72 m
Combined mass (m) = 120 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Energy (E) =?
We can obtain the energy by using the following formula:
E = mgh
Where
E => is the energy.
g => is the acceleration due to gravity
m => is the mass.
h => is the height.
E = 120 × 9.8 × 72
E = 84672 J
Thus, the energy is 84672 J
of the two Lewis/electron dot
structure representations, which is
the correct one for oxygen gas?
The electron dot diagram for an element shows the valence electrons for the element. Oxygen is in group 16/VIA, so it has six valence electrons. Draw the symbol for oxygen. Then place one dot at each side of the symbol.
How do children use food molecules to grow taller?
Options
A - Children grow taller when they use food molecules they eat to build large molecules that make up new cells.
B - Children grow taller when they use the food molecules they eat to make up new cells without changing the food molecules.
C - Children grow taller when they use the energy from the food molecules, but all of the molecules leave the body as waste.
D- Children grow taller when they store food molecules as fat.
A or B or C Or D ?
Answer:
C) Children grow taller when they use the energy from the food molecule, but all of the molecules leave the body as waste.
hope it helps.
Answer:
C - Children grow taller when they use the energy from the food molecules, but all of the molecules leave the body as waste.
hope it is helpful to you ☺️☺️☺️☺️
1. A bird perching in the tree hears the chirping of another bird. A whale hears
the songlike sound made by another whale swimming pcar it. Which sound
travels faster, the bird's chirping or the whale's singing? Explain your answer.
Answer:
The sound from the whales singing is faster than that from the birds chirping.
Explanation:
The sound from the whales singing will travel faster than the sound from the birds chirping because sound travels faster through a medium than through air.
In this case the whales are in water which is a medium while the birds are in the air and thus, the sound from the water will travel faster.
A 27.5g piece of aluminum sits in a room and cools. It loses 6120.0 J of heat. If the initial
temperature of aluminum is 157.3°C, what is the final temperature? The specific heat
capacity of aluminum is 0.900 J/gºC.
Answer:
[tex]T_2= -90.0°C[/tex]
Explanation:
Hello!
In this case, according to the given description of how the temperature changes for aluminum in agreement to the loss of heat of 6120.0 J, we can use the following equation:
[tex]Q=mC\Delta T=mC(T_2-T_1)\\\\[/tex]
Thus, by knowing Q, m, C and the initial temperature, we are able to obtain:
[tex]T_2=T_1+\frac{Q}{mC}\\\\T_2=157.3\°C+\frac{-6120.0J}{27.5g*0.900 J/g\ºC}\\\\T_2= -90.0°C[/tex]
Regards!
What is the total number of Joules lost when 10. grams of water at 80.°C is cooled to 60.°C?
Answer:
[tex]\boxed {\boxed {\sf 836.8 \ Joules \ lost}}[/tex]
Explanation:
Since we are given the mass and change in temperature, we should use the following formula for heat.
[tex]q= mc \Delta T[/tex]
In this formula, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
We know the mass of the water is 10 grams. We will have to look up water's specific heat, because it is not given. It is 4.184 J/g °C.
Let's find the change in temperature. This is the difference of the final and initial temperature. The water started at 80 °C and cooled to 60°C.
ΔT= final temperature - initial temperature ΔT= 60° C - 80°C ΔT= -20 °CNow we have values for each variable.
m= 10 gc= 4.184 J/g°C ΔT= -20°CSubstitute the values into the formula.
[tex]q= 10 \ g * 4.184 \ J/g \textdegree C * -20 \textdegree C[/tex]
Multiply the first 2 numbers. The units of grams will cancel each other out.
[tex]q= 41.84 \ J/ \textdegree C * -20 \textdegree C[/tex]
Multiply again. This time, the degrees Celsius cancel.
[tex]q= -836.8 \ J[/tex]
A total of 836.8 Joules are lost.
Calculate the mass of 0.900 mol of lithium thiocyanate.
Answer:
58.6 g.
Explanation:
Hello there!
In this case, since the molecular formula of lithium thiocyanate is LiCNS and therefore its molar mass is 65.1 g/mol, it possible to perform the calculation of the mass of 0.900 moles of this substance by recalling the following equivalence statement:
1 mol = 65.1 g.
Thereby, we can calculate the required mass as shown below:
[tex]0.900mol*\frac{ 65.1g}{1mol}\\\\58.6 g[/tex]
Best regards!
Determine the number of moles of CH3Br in 47.5 grams of CH3Br?
Show Work please - NO LINKS
Answer:
0.500 moles
Explanation:
In order to convert grams of any given substance into moles, we need the substance's molar mass:
Molar Mass of CH₃Br = Molar Mass of C + (Molar Mass of H)*3 + Molar Mass of BrWe can find the molar masses of each element in the periodic table:
Molar Mass of CH₃Br = 94.94 g/molNow we can divide the given mass by the molar mass in order to calculate the number of moles:
47.5 g ÷ 94.94 g/mol = 0.500 molesHow do conduction, convection, and radiation redistribute incoming solar energy?
The solar energy from sun is radiating to the earth's surface and making the atmosphere warmer. The heat energy is redistributing back by through different heat transfer modes.
What is heat transfer?Heat energy transfer from hotter region to colder region by the temperature gradient. The heat is transferring through solids by conduction. Conduction is the process of heat transfer through the closely packed particles in solids.
Heat transfers through convection in liquids. Where the hot molecules rise to the surface and transfers the heat to other molecules. The heat radiated to the earth make the sources in earth warmer. Through convection, the water molecules heat up.
The water vapor formed by convection process radiates to the atmosphere and redistributes the energy back.
To find more on radiation, refer here:
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Mechanical digestion begins in the_____ and involves physical processes, such as chewing.
Answer:
begins in the mouth
Think about the decomposition reaction of ozone.
2 O3 ----> 3 O2
If 71.7 mol ozone are in this reaction, what is the theoretical yield of O2 (in gram)?
Answer:
3441.6 grams.
Explanation:
2 O₃ → 3 O₂
First we convert 71.7 moles of ozone (O₃) into moles of oxygen gas (O₂), using the stoichiometric coefficients of the reation:
71.7 mol O₃ * [tex]\frac{3molO_2}{2molO_3}[/tex] = 107.55 mol O₂
Then we convert 107.55 moles of O₂ into grams, using the molar mass of O₂:
107.55 mol * 32 g/mol = 3441.6 g
When 16.35 moles of SI reacts with 11.26 moles of N2, how many moles of SI3N4 are formed
Answer:
5.450 mol Si₃N₄
Explanation:
Step 1: Write the balanced equation
3 Si + 2 N₂ ⇒ Si₃N₄
Step 2: Establish the theoretical molar ratio between the reactants
The theoretical molar ratio of Si to N₂ is 3:2 = 1.5:1.
Step 3: Establish the experimental molar ratio between the reactants
The experimental molar ratio of Si to N₂ is 16.35:11.26 = 1.45:1. Comparing both molar ratios, we can see that Si is the limiting reactant.
Step 4: Calculate the moles of Si₃N₄ produced from 16.35 moles of Si
The molar ratio of Si to Si₃N₄ is 3:1.
16.35 mol Si × 1 mol Si₃N₄/3 mol Si = 5.450 mol Si₃N₄
in which block does chlorine lies
Answer:
P-block
Explanation:
Chlorine
Atomic number (Z) 17
Group group 17 (halogens)
Period period 3
Block p-block
Answer:
What does "in which block does chlorine lies"? That question has no way to answer it because there is no question content lol
Explanation:
Is water an acid, base, or neutral?
Write out and balance the chemical equation:
A solution of nickel (II) chloride reacts with a solution of potassium hydroxide
to produce solid nickel (II) hydroxide and a solution of potassium chloride.
Explanation:
NiCl2 + KOH = NiOH + KCl
since nickel is the primary element in nickel ii chloride, find the oxidation no of nickel in the compound and chlorine should have 2 as a subscription since the ii in the compound represents that nickel has an oxidation no of 2
PLEASE HELP ME !!!! !!!!
Answer:
180-115-31=34
Which statement describes the best way to determine how different levels of light affect the growth of seedling plants?
Choose three different light levels, and place four identical plants under each light level to observe the light’s effect on multiple plants.
Choose five different light levels, and place one identical plant under each of the light levels for exactly one week.
Choose four different light levels, and place eight different plant types under the light levels, two under each one, and observe them every day.
Choose one type of light and one type of plant, and then observe the plant for at least four weeks, measuring it each day.
Answer:
Choose three different light levels, and place four identical plants under each light level to observe the light’s effect on multiple plants.
Explanation:
Thorium-236 has a half life of 10.0 minutes.If I have 250 grams of Thorium-236 , how many half lives will have taken place after 50.0 minutes?
Answer:
5 half lives
Explanation:
Given that
Thorium - 236 contains the half-life of 10.0 minutes
And there is 250 grams
We need to find out the number of half lives that took place after 50.0 minutes
As in the question
1 half life is 10 minutes
So for 50 minutes, it would be
= 50 minutes × 1 half life ÷ 10 minutes
= 5 half lives
Using the balanced reaction below, answer the following question:
2 Al + 3 ZnCl2 → 3 Zn + 2 AlCl3
How many moles of ZnCl2 are needed to react when 1.75 moles of AlCl3 form?
Answer:
Calculate the number of grams of AlCl3 produced from 2.5 moles of Cl2. The reaction between H2 and O2 produced 31.0 g of water. How many grams of O2 reacted?
Explanation:
A body of mass 0.5kg is thrown vertically upwards
from the ground with an Initial velocity of 80.m/s
Calculate
" the potential energy at B 80.0cm above the ground
Here's the solution,
we know,
potential energy = mgh
where,
m = mass = 0.5 kgg = acc due to gravity = 9.8 m/s²h = height = 0.8 m (80 cm)So,
=》
[tex]p.e = 0.5 \times 9.8 \times 0.8[/tex]
=》
[tex]p.e = 3.92 \: \: joules[/tex]