Answer:
Gram
Explanation:
The SI unit of mass is grams.
Mass is the measure of matter contained in a substance. It is usually determined by weighing an amount of substance on a balance or scale.
Mass is a fundamental quantitySo, the unit of mass is grams. Ounce and pounds are other units but not the standard one. Newton is the unit of force and weight.why is our use of electric power increasing?
Which stage of the cell cycle results in two identical cells?
mitosis
cytokinesis
interphase
metaphase
Answer:
B.
Explanation:
1)Calculate the molar masses for the following compounds.
a)NH4NO3
b) N2O5
c) NaCN
d)(NH4)2SO4
2.a)What is the volume of 0.001 mol of hydrogen (H2) gas at STP?
b)What is the mass of 5.6 L of CO2 gas at STP?
3)a. What is the total number of atoms found in 3 moles of a N2 molecule?
b.Calculate the number of helium (He) atoms if 0.05 moles of He is given.
4.a)What is the mass of 3 moles of NaOH? b)What is the mole number of 22 g of CO2 gas?
5.a)What is the number of moles of 224 L Chlorine (Cl2) gas at STP?
b) Find the masses for the following substances in grams- 1)1.5 mol of water 2)20 mol of C₂2H6 6. If 10 moles of oxygen (O2) molecules are given, calculate the volume of the oxygen molecules at STP.
7. What is the mass of 3 moles of NaOH?
NH4NO3 The molar mass is 80.04336 g/mol
N2O5 The molar mass is 108.01.
NaCN The molar mass is 49.00717 g/mol
(NH4)2SO4 The molar mass is 132.139 g/mol .
Molar masses
The mass in grams of one mole of a chemical is its molar mass.
1) What is the mass of 5.6 L of CO2 gas at STP?
PV = nRT is the ideal gas equation, which links pressure (P), volume (V), and absolute temperature (T).
where R = 8.314 Jmol K-1, the universal gas constant.
1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 mole = 1 atm = 1.1310 5 Nm 2
V=nRT/P =1.8.14.273/(1.013.10 5) =0.0224 m 3
2.24 liters
As a result, a gas's molar volume at STP is 22.4 litres.
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The formula of gypsum and that of plaster of parls are CaSO4.xH2O and CaSO4.yH2O respectively.
The difference x-y equals to;
1) 1
2) 3/2
3) 5/2
4) 1/2
Help me
Answer:
[tex]\frac{3}{2}[/tex]
Explanation:
Given formula of Gypsum:
CaSO₄. xH₂O,
True formula:
CaSO₄. 2H₂O, x = 2
Formula of plaster of paris = CaSO₄. [tex]\frac{1}{2}[/tex] H₂O,
y = [tex]\frac{1}{2}[/tex]
The difference between x and y; x - y:
x - y = 2 - [tex]\frac{1}{2}[/tex] = [tex]\frac{3}{2}[/tex]
What is magnetic fields?
_______: a type of nebula in which stars form
Answer:
Orion Nebula
Explanation:
That is an enormous cloud of gas and dust
Which statement or question is a good hypothesis?
A. Taxicabs are yellow.
B. Red cars are cooler than green cars.
C. Black cars heat up faster in sunlight than white cars.
D. What color of car sells best?
Answer:
c is the awnser
a hypothesis is not a question it is more like a statment and something that could be proven in the future
True or false. When an area within an atom is crowded with electrons it is known as a dipole "moment False True
Answer:true
Explanation:
Answer:
im not sure but ill say false
Explanation:
How many grarns would 3 moles of carbon dioxide (CO2) weigh? (round to the
nearest whole number)
Your answer
Mass of CO₂ = 132 g
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
mole also can be formulated :
[tex]\tt n=\dfrac{mass}{MW}[/tex]
moles of CO₂ = 3
mass of CO₂(MW=44.01 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=3\times 44.01\\\\mass=132.03~g\approx 132~g[/tex]
What is the difference between elements and compounds?
Multi-Step Conversions (Always go through moles!)
Example: How many grams of water (H2O) will you need in order to have
3.22 x 1024 water molecules?
Mass of water needed : 96.3 g
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
moles H₂O=
[tex]\tt moles=\dfrac{N}{No}\\\\moles=\dfrac{3.22\times 10^{24}}{6.02\times 10^{23}}\\\\moles=5.35[/tex]
mass H₂O(MW=18 g/mol) :
[tex]\tt mass=moles\times MW\\\\mass=5.35\times 18\\\\mass=96.3~g[/tex]
True or False: A polymer is a complex molecule made from smaller,
repeating molecules bonded together.
What happens to ions during bonding to form an ionic compound? O Cations accept electrons and anions give away electrons. O Anions and cations share electrons. O Cations give away electrons and anions accept those electrons.
Answer:
Last one: Cations give away electrons and anions accept those electrons.
Explanation:
Just did it
Answer:
D
Explanation:
"Cations give away electrons and anions accept those electrons."
who will help it science
Answer:
yuh because it's the hot water :)
Which element forms an ion that is larger than its atom
Answer:
Electronegative element form anion that is larger than its neutral atom like fluorine F-
Explanation:
Given the density of 1.2 g/mL and a volume 7.8 mL. What is the mass? Round to the nearest 0.1.
Answer:
here is my answerrrrrrr
how dose pendulum work
Answer:
Pendulum, body suspended from a fixed point so that it can swing back and forth under the influence of gravity. Pendulums are used to regulate the movement of clocks because the interval of time for each complete oscillation, called the period, is constant.
Explanation:
It is a simple tool which helps in balancing, healing and clearing our mind and body. They help us seek answers to certain questions by picking on subtle vibrations. They do so by moving in the direction of invisible energy around us.
what is the purpose of making sodium extract for the detection of hetero elements in organic compond?
Use the portion of the periodic table shown at the bottom to answer the questions.
Part 1: Name two elements that have the same properties as magnesium (Mg).
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences.
Answer:
Part 1 calcium and strontium have same properties as magnesium because all three are in same group.
Part 2 As atomic number of potassium is 19 so it contains 19 protons and 19 electrons because it is neutral
Potassium has 20 neutrons because its mass is 39
We can find neutron = atomic mass - atomic number
Explanation:
ASAP please and Thankyou
Explanation:
green is dominate and theres a G in each box that makes it all Green
Which type of orbital is shown?
Answer:
2px orbital...
Orbitals are represents the wave-like behavior of an electron or pair of electrons in an atom. Therefore it shows 2pX orbital.
What is orbitals ?
The four fundamental kinds of orbitals are s, p, d, and f. The spherical form of a s orbital can accommodate two electrons.
Each of the three p orbitals has the same fundamental structure but differs in its spatial orientation. Up to six electrons can fit into the p orbitals.
The s sublevel can only hold two electrons because it has one orbital. The p sublevel has three orbitals and a maximum capacity of six electrons.
The d sublevel may hold a maximum of 10 electrons due to its five orbitals. Additionally, the 4 sublevel has 7 orbitals and a maximum of 14 electrons.
Thus, it shows 2pX orbital.
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4.imidazole has two nitrogen atoms, labeled as n3 and n1. please indicate which nitrogen is more basic. draw the products of protonating both nitrogen atoms and use this as part of your explanation.
[tex]N_3[/tex] is more basic than [tex]N_1[/tex] in imidazole.
Imidazole have two nitrogen attached in the ring at [tex]N_1 and N_3[/tex] .
This compound is an aromatic compound as it have [tex](4n+2)[/tex]π electrons which means lone pair electrons of [tex]N_1[/tex] nitrogen atom also takes part in π
system.
Thus when a proton attacks on this compound it easily attacks at [tex]N_3[/tex] rather than [tex]N_1[/tex].
After the attack of [tex]H^{+}[/tex] ion at [tex]N_3[/tex] the conjugate base thus formed is also aromatic and hence is more stable.
If the proton had attacked at [tex]N_1[/tex] the conjugate base would not be aromatic and its stability will decrease.
The reaction is shown in the image attached
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HELP PLEASE :((( Explain why helium filled balloons deflate over time faster than air filled balloons do?
Answer:
Because helium has more molecules trying to escape at faster rates
Explanation:
Answer:
helium filled balloons tend to deflate over time faster than air filled balloons do because, the average velocity of helium molecules is higher than that of molecules of any gas found in air, so helium escapes through the pores in the balloon more quickly.
Explanation:
after researching I found this and tried to respond as quickly as possible!! hope this helps but it has something to do with the molecules .
Why is the Law of Conservation of Mass a law, rather than a theory?
A. It has more scientific evidence supporting it
B. It has both independent and dependent variables
C. It has been tested with the latest laboratory balances, which are very accurate
D. It describes a repeatedly observed relationship, but it does not offer an exclamation
Answer: During a chemical reaction, matter cannot be created nor destroyed, matter can change form through physical and chemical changes, but through any of these changes, matter is conserved; even though the matter may change from one form to another, the same number of atoms exists before and after the change takes place.
Explanation: <3
water interacts with polar substances like –oh groups but not with non-polar substances like methyl (−ch3) or ethyl groups (−ch2). using this information, select the molecules that will easily dissolve in water based on polarity not on size. check all that apply.
CH3OH and CH3CH2CH2OH will easily dissolve in water based on polarity not on size.
What is Polarity ?In chemistry, polarity describes the type of bonds that exist between atoms. Atoms share electrons when they join forces to form chemical bonds. When one of the atoms applies a stronger attractive force to the bond's electrons, a polar molecule is created.
For instance, the chlorine atom is slightly negatively charged while the hydrogen atom in hydrogen chloride is slightly positively charged.Water is polar due to its form even though its molecules have no net charge. The molecule's hydrogen ends are positive, and its oxygen ends are negative. Water molecules are drawn to other polar molecules and to one another as a result.Learn more about Polarity here:
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Help someone!!!I will mark you brainliest
Answer:
a) Na2S
b) AlF3
c) O2
d) C6H12O6
Explanation:
please mark me brainliest and 5 star
2. Which of the following interactions would be the weakest?
A. Lit and C4H10
B. 02- and C3Hg
C. Lit and C3H8
D. 02- and C4H10
Answer:
its rather B or C
Im sorry if I was wrong
Explanation:
What are some molecular compounds that we use in everyday life and their products?
Ex: Kirkland water - dihydrogen monoxide; H2O
Answer:
Water. Chemical Formula: H2O.
Table Salt. Chemical Formula: NaCl.
Sucrose (Sugar) Chemical Formula: C12H22O11.
Soaps. Chemical Formula: RCOO–Na, Where R is a long chain of carbon atoms ranging from 16-18 in number.
Toothpaste. Chemical Formula: CaCO3 or NaF.
Explanation:
A reaction is found to have an activation energy of 108 kj/mol. If the rate constant for this reaction is 4. 60 × 10-6 s-1 at 275 k, what is the rate constant at 366 k?.
The rate constant at 366K is 0.58 s⁻¹.
Ea = 108 kJ/mol = 108000 J/mol; an activation energy of a reaction
T₁ = 275 K
k₁ = 4.60 × 10⁻⁶ 1/s; the rate constant at 275 K
T₂ = 366 K
R = 8.314 J/Kmol
k₂ = ?; the rate constant at 366 K
Arrhenius equation: ln(k₁/k₂) = Ea/R (1/T₂ - 1/T₁)
ln(4.60 × 10⁻⁶s⁻¹/k₂) = 108000 J/mol/8.314 J/Kmol × (1/366K - 1/275K)
k₂ = 0.58 s⁻¹
For all chemical reaction some energy is required and that energy is called activation energy (energy that needs to be absorbed for a chemical reaction to start).
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The pressure of a mixture within a rigid container of nitrogen, carbon dioxide and oxygen is 150 kPa. What
is the partial pressure of oxygen if the partial pressures of nitrogen and carbon dioxide are 100 kPa and 24
kPa, respectively?
Answer:
P(O₂) = 26KPa
Explanation:
Given data:
Total pressure = 150 KPa
Partial pressure of nitrogen = 100 KPa
Partial pressure of carbon dioxide = 24 KPa
Partial pressure of oxygen = ?
Solution:
According to Dalton law of partial pressure,
The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.
Mathematical expression:
P(total) = P₁ + P₂ + P₃+ ............+Pₙ
Now we will solve this problem by using this law.
P (total) = P(O₂) + P(N₂) + P(CO₂)
150 KPa = P(O₂) + 100 KPa + 24 KPa
150 KPa = P(O₂) + 124 KPa
P(O₂) = 150 KPa - 124 KPa
P(O₂) = 26KPa