Answer:
A tetrahedral electron domain geometry with covalent bonded atoms.
What is the term for the set of steps that scientists use to gather reliable
information?
Answer:
I think it would be Scientific Method.
PLEASE HELP ME ASAP DUE IN 30 MINUTES !!!!!!!!!!!!
4. A student performed an experiment to determine the density of a sugar solution and obtainedthe following results: 1.24 g/mL, 1.21 g/mL, 1.23 g/mL.The actual density is 1.50 g/mL. Circle the correct value for the average, X, in the first column and for the accuracy evaluation, RE(%), in the second column.
Answer:
X= 1.23 g/ml because it closer to the numbers given
RE%= -18 i think
i had one of these questions, and that what my teacher said and i got it right
How many moles of a gas sample are in a 20.0 L container at 373 K and 203 kPa? The gas constant is 8.31 L−kPa/mol−K. A)0.33 mole B)0.65 mole C)1.30 moles D)3.05 moles
Answer:
Option (C) 1.30 moles
Explanation:
The following data were obtained from the question:
Volume (V) = 20L
Temperature (T) = 373K
Pressure (P) = 203 kPa
Gas constant (R) = 8.31 L.kPa/mol.K.
Number of mole (n) =...?
The number of mole of the gas in the container can obtained by applying the ideal gas equation as illustrated below:
PV = nRT
Divide both side by RT
n = PV /RT
n = 203 x 20 / 8.31 x 373
n = 1.30 mole.
Therefore, 1.30 mole of the gas is present in the container.
Answer:
1.30 ml
Explanation:
How many miles of H2SO4 are present in 1.63 liters of a 0.954 M solution
Answer:
1.555 moles
Explanation:
Mass of sulfuric acid is 98.079g/mol
One liter of 0.954 solution has 0.954 mols
1.63 liters will have 0.954x1.63 = 1.555moles
how many atoms are in 95 grams of copper
Answer:
Here's a quick conversion before I answer your question, use it whenever needed.
1 moles Copper to grams = 63.546 grams. 2 moles Copper to grams = 127.092 grams. 3 moles Copper to grams = 190.638 grams. 4 moles Copper to grams = 254.184 grams. 5 moles Copper to grams = 317.73 grams. 6 moles Copper to grams = 381.276 grams. 7 moles Copper to grams = 444.822 grams.
Ok, now I'll answer your question.
Atomic masses are given in atomic mass units. One atomic mass unit is equal to one gram per mole. When you add these together for a compound, you get the molar mass of that compound. For example, silicon dioxide consists of one silicon atom and two oxygen atoms. The atomic mass of silicon is 28 grams and the atomic mass of oxygen is 16 grams.
(Hope the conversion and the answer helped) Sky
Why is it important to have the myelin sheath not covering the entire axion ?
Answer
safety
Explanation:
you have to be safe when dealing with chemicals
If a solution has a pOH of 8.71, what is the [H+]?
Answer: [tex]5.1\times 10^{-6}M[/tex]
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
[tex]pH+pOH=14[/tex]
Putting in the values:
[tex]pH=14-8.71=5.29[/tex]
[tex]5.29=-log[H^+][/tex]
[tex][H^+]=5.1\times 10^{-6}[/tex]
Thus [tex][H^+][/tex] is [tex]5.1\times 10^{-6}M[/tex]
Could the increase in algae in the neighborhood lake be related to Sara’s farm?
Answer:
The increase in algae could be related to Sarah's farm due to her use of fertilizer to grow her crops Fertilizers contain high amount of nitrogen and help produce strong, healthy crops but they can also wash into lakes and rivers. It is however likely that the lake contains some of the fertilizer from Sarah's farm.
Sample response : The increase in algae could be related to Sarah’s farm due to her use of fertilizer. Fertilizers help produce strong, healthy crops, but they can also wash into lakes and rivers. When they do, they provide a large food supply for the algae living there, which can cause the algae population to increase dramatically. Samples from the neighborhood lake show high levels of phosphorus and nitrogen, the key ingredients of most fertilizers, and a large increase in the algae population. It is therefore likely that the lake contains some of the fertilizer from Sarah’s farm.
Explanation:
well if you arent doing it on edge then good luck ;)
Which process works with erosion to break down rock?
A. Deposition
B. Settling
C. Transportation
D. Weathering
Answer:
weathering
Explanation:
one brakes it down the other carries it away
The rock particles that are broken down inside the weathering method are moved to some other place within the course of erosion. for this reason, weathering and erosion paintings collectively reshape Earth's panorama. The technique of bodily breaking down the rock.
Which device works with erosion to interrupt down rock deposition?Weathering is the breaking down or dissolving of rocks and minerals on this planet's ground. once a rock has been damaged down, a method known as erosion transports the bits of rock and minerals away. Water, acids, salt, flora, animals, and adjustments in temperature are all sellers of weathering and erosion.
What are the four essential procedures of abrasion?detrimental waves erode through the 4 maximum vital strategies; Hydraulic motion, Compression, Abrasion, and Attrition.
Learn more about weathering process here: https://brainly.com/question/23103723
#SPJ2
Our sun was formed ________.
A - When the universe began
B - After many generations of stars had formed and then exploded
C - When stars first formed in the early universe
D - 6000 years ago
Answer:
i think its B not sure sry hope this helps
Calculate the pH of a (0.000765) M solution of KOH
Answer:
pH = - log(0.000765)
= -(-3.11)
= 3.1
so the solution is basic
rest you can check values using calculator
If you have a substance that has molarity of .200M and then you increase the molarity to .300M, which molarity would increase the rate of reaction, if used in an experiment? Why? PLEASE ASAP due in an HOUR
Answer:
.300M
Explanation:
It is necessary for us to remember that increasing the reactant concentration increases the rate of reaction. This is because reactant concentration is one of the most important factors that affects the rate of reaction.
Reactant concentration affects the rate of reaction because according to collision theory, chemical reaction results from effective collisions between reactants. Hence, if there are more reactants in the system, there are greater chances of effective collisions between the reactants.
Since 0.300M is a higher concentration than 0.2000M, the rate of reaction will increase when a 0.3000M solution is used.
When it is winter, the United States receives the least direct solar energy, as compared with the rest of the year. Why does this happen?
The Northern Hemisphere is titled away from the sun
What is the ratio of moles of sulfur to moles of sulfur trioxide in
25 +302-->2SO3
Answer: It's 2:2
Explanation: you can look at the coefficient stands in front of the chemical
For example if they ask the ratio of oxygen to sulfur trioxide, it would be 3:2 and vice versa vv..
PLEASEEEEEEEE HELPPPPPP I BEGGGGG FOR HELPPPPP PLEASEEEE
How many molecules are in 25.4 grams of dinitrogen pentoxide, N2O5?
Answer: There are [tex]1.415\times 10^{23}[/tex] molecules in 25.4 g of [tex]N_2O_5[/tex]
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{25.4g}{108g/mol}=0.235moles[/tex]
1 mole of [tex]N_2O_5[/tex] contains = [tex]6.023\times 10^{23}[/tex] molecules
Thus 0.235 moles of [tex]N_2O_5[/tex] contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.235=1.415\times 10^{23}[/tex] molecules.
There are [tex]1.415\times 10^{23}[/tex] molecules in 25.4 g of [tex]N_2O_5[/tex]
The number of electrons in a neutral atom of hydrogen (H) atom is
Which statement describes an open circuit? The circuit is incomplete and broken, and the lights in the circuit shine. The circuit is complete and unbroken, and the lights in the circuit shine. The circuit is incomplete and broken, and the lights in the circuit do not shine. The circuit is complete and unbroken, and the lights in the circuit do not shine.
Answer:
the third option
Explanation:
The circuit is incomplete and broken, and the lights in the circuit do not shine.
An open circuit means an incomplete circuit.
The first option is wrong since the lights do not shine in an open circuit.
The second option is wrong since an open circuit is incomplete.
The fourth option is also wrong since an open circuit is broken or incomplete.
∴ The third option is correct.
Answer: C. The circuit is incomplete and broken, and the lights in the circuit do not shine.
What are consequences for an animal if it attacks
Answer:
it gets euthanized. or it gets put down
Complete the sentence
Ice crystals forming on a
window is a
physical change
chemical change
Answer:
Explanation:
physical change
What is photosynthesis
Answer
gives light
Explanation:
Answer:
Producing foods in green plants using the sunlight,water, chlorophyll and carbon dioxide convert them into oxygen and energy rich organic compounds.
Describe one way that carbon can be stored for a short time in the natural cycle.
Answer:
by eating a food item with carbon in it? sorry if im wrong.
What is the molarity if 2.00 liters containing 49.0 grams of sodium carbonate [Na2CO3)?
(Molar mass of Na is 22.99 g/mol, C is 12.01 g/mol and O is 16.00 g/mol.)
Answer: The molarity of solution is 0.231 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in L
Molar mass of [tex]Na_2CO_3[/tex] = [tex]2\times 22.99+1\times 12.01+3\times 16.00=105.99[/tex]
moles of [tex]Na_2CO_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{49.0g}{105.99g/mol}=0.462mol[/tex]
Now put all the given values in the formula of molality, we get
[tex]Molarity=\frac{0.462mol}{2.00L}[/tex]
[tex]Molarity=0.231M[/tex]
Therefore, the molarity of solution is 0.231 M
In the reaction H2S + NH3 NH4+ + HS–, the two Brönsted-Lowry bases are
A) NH3 and HS-
B) NH3 and NH4+
C) H2S and NH3
D) H2S and HS-
Answer:
Option A is correct.
The two Brönsted Lowry bases are NH₃ and HS⁻.
Explanation:
In any neutralization reaction or any reaction that seems like a neutralization reaction, the Bronsted Lowry Acid is the specie that donates a proton in reaction, the base is the specie that accepts the donated proton in the reaction.
The acid, after donating the proton becomes the conjugate base, and the base after receiving the proton becomes a specie known as the conjugate acid.
In this reaction, H₂S (acid) loses a proton to NH₃ (base) to form a HS⁻ (conjugate base) and NH₄⁺ (conjugate acid).
In a backward reaction, the conjugate acid and conjugate base form the acid and base pair respectively as required.
Hence, the two two Brönsted-Lowry bases are NH₃ and HS⁻.
Hope this Helps!!!
Answer:
A) NH3 and HS-
Explanation:
A Bronsted-Lowry base is a substance that accepts protons.
The ammonia is a Bronsted-Lowry base because can accept a proton from the hydrogen of H2S to become NH4+.
The HS⁻ is the Brønsted-Lowry base too because it has one more H atom. It has accepted a proton (H⁺), so it is a Brønsted-Lowry base.
How do the lengths of daylight hours and nighttime hours everywhere on Earth
compare on an equinox
Answer:
During the equinoxes every location on our Earth (except the extreme poles) experiences 12 hours of daylight and 12 hours of darkness. The vernal or spring equinox occurs in the northern hemisphere on March 21 or 22 (the fall equinox of the southern hemisphere).
Explanation:
5. A gas occupies 2000. Lat 100.0 K and exerts a pressure of 100.0 kPa. What volume will
the gas occupy if the temperature is increased to 400. K and the pressure is increased to
200. kPa?
Answer:
4000 L
Explanation:
Step 1:
Data obtained from the question. This include the following:
Initial volume (V1) = 2000 L.
Initial temperature (T1) = 100 K.
Initial pressure (P1) = 100 kPa.
Final temperature (T2) = 400 K.
Final pressure (P2) = 200 kPa.
Final volume (V2) =..?
Step 2:
Determination of the new volume of the gas.
The new volume of the gas can be obtained by using the general gas equation as follow:
P1V1/T1 = P2V2/T2
100 x 2000/100 = 200 x V2/400
Cross multiply to express in linear form.
100 x 200 x V2 = 100 x 2000 x 400
Divide both side by 100 x 200
V2 = (100 x 2000 x 400)/(100 x 200)
V2 = 4000 L
Therefore, the new volume of the gas is 4000 L
need right now, please help :)
Two planets are orbiting a star. Planet A is two times closer to the star than planet B. Which planet orbits at a higher speed?
a.) Planet A
b.) Planet B
c.) they both orbit at the same speed
Answer:
planet A
Explanation:
because it doesn’t have to go as far when it orbits
Name the organic product of
C4H10 + Cl2 --> C4H9Cl + HCl
Answer:
C4H110+ C12--> C4H9CI+HCI: substitutions
what tool do you need to use to find temperature of hot chocolate a meter stick b stopwatch c balance d graduated cylinder e beaker f thermometer
Answer:
Explanation:
I believe u should use a thermometer coz its better and u will be able to find the temperature more accurately!!
Help me, ANSWER ALL 6 QUESTION, if you completed, you will have 30 POINTS
Answer:
ONE: spoon/ catapult
TWO: ball holder
THREE: the joint
FOUR: the rotater
FIVE: I think it is a lever that picks up the big spoon/ catapult
SIX: I don't know the chapter
what tool do you have to use to precise amount of water? A meter stick B stopwatch C balance D graduated cylinder E beaker F thermometer
Answer:
graduated cylinder
Explanation:
It shows exact volume very precisely.