Answer: milligrams
Explanation:
Because 0.007960 = 1.75487961e-5 pounds
And 0.7960= 1.75488e-6
ANSWER PLEASE LIMIT TIME !!!!
What do earth and space have alike ?
Answer:
Great question, here are a few! (╯°▽°)╯ ┻━┻
Explanation:
1. Atmosphere, The first difference between the Earth and space is the atmosphere.
2. radiation (high level of dangerous particles)!
3. gravity (weightlessness in space)
How many copper(I) ions (atoms of Cu 1+ ) are in a sample of copper(I) sulfate that weighs 35.4 grams?
Answer:
copper has 2+ ions in a sample of copper
How to balance 4NaNO3 + 5PbO → 8Pb(NO3)2 + 7Na2O with coefficients?
The balanced equation
2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O
Further explanationGiven
Reaction
NaNO3 + PbO → Pb(NO3)2 + Na2O
Required
Balanced equation
Solution
1. Give coefficientaNaNO₃ + bPbO → Pb(NO₃)₂ + cNa₂O(Pb(NO₃)₂ ⇒coefficient 1 for the most complex compounds)
2. Make an equationN, left=a, right=2⇒a=2
Na, left = a, right=2c⇒a=2c⇒2=2c⇒c=1
Pb, left = b, right=1⇒b=1
The equation becomes :
2NaNO₃ + PbO → Pb(NO₃)₂ + Na₂O
14.
Consider the following balanced chemical equation:
P205
3 H2O → 2 H3PO4
Calculate the mass of hydrogen phosphate, H3PO, that will be produced from 105.9 g of P,Os.
Answer:
Mass = 72.52 g
Explanation:
Given data:
Mass of hydrogen phosphate produced = ?
Mass of P₂O₅ react = 105.9 g
Solution:
Chemical equation:
P₂O₅ + 3H₂O → 2H₃PO₄
Number of moles of P₂O₅:
Number of moles = mass/molar mass
Molar mass of P₂O₅ 283.9 g/mol
Number of moles = 105.9 g/ 283.9 g/mol
Number of moles = 0.37 mol
Now we will compare the moles of P₂O₅ with H₃PO₄ from balance chemical equation.
P₂O₅ : H₃PO₄
1 : 2
0.37 : 2/1×0.37= 0.74 mol
Mass of H₃PO₄ :
Mass = number of moles × molar mass
Mass = 0.74 mol × 98 g/mol
Mass = 72.52 g
Liquid waste that exits the body is _____________ and solid waste is ___________.
A. Feces, Urine
B. Urine, Feces
C. Lymph, Feces
D. Blood, Lymph
Answer:
The answer is B. Urine, Feces
Explanation:
Answer:
b.urine ,feces
.................
A student rubbed a plastic comb with a piece of silk cloth. She held the comb near running water and saw that the stream of
water moved toward the comb.
Why did the stream of water move toward the comb?
A Rubbing the comb caused it to get hot so it repelled the water.
O B. Rubbing the comb caused charges to build up, so it repelled the water.
C. Rubbing the comb caused it to become magnetized, so it attracted the water.
O D. Rubbing the comb caused static electricity to build up, so it attracted the water.
Answer:
c
Explanation:
c
Answer:
Rubbing the comb caused static electricity to build up, so it attracted the water.
How many chlorine atoms are on the products side of the reaction 2al 6hcl → 2alcl3 3h2? 2
Answer:
6
Explanation:
The given reaction is aluminium with hydrochloric acid
2Al + 6HCl → 2AlCl3 + 3H2
the product is aluminium chloride and hydrogen gas.
We can clearly, calculate that there are 2*3=6 chlorine atoms in product side of the reaction.
Answer:
C. 6
Edg2021
Explanation:
Person is right.
Which statement best describes what an ocean tide is?
A A change in water level that makes a high tide higher
B A change in water level at the shoreline that is being caused by the gravitational pull of the Moon
C A change in water level at the shoreline that is being caused by the gravitational pull of the Sun
D A change in water level that makes a low tide lower
Answer: B
Explanation: high tides and low tides are usually caused by the moon. The moons gravitational pull generates something called the tidal force. I’m not gonna go deep into this but yeah I think the answer is B
Answer:
:)
Explanation:
please helpppp!!!
A tank containing 550 mL of oxygen has a pressure of 3.5 atms. If the pressure is changed to standard atmospheric pressure, approximately 1.0 atms, what will the resulting volume be?
help!!
Answer:1925ml
Explanation:
Do not quote me on this but with boyles law in mind as pressure tends to increase the volume of the container decreases. So I believe that you would need to multiply 550ml by the 3.5atm because p1v1=p2v2 so they both end up with the same end answer and if the pressure is 1.0atm then the answer would maybe be 1925ml. since 1*1925ml =1925ml and 3.5atm*550=1925ml (there is always a possibility this is wrong though)
Answer: the picture shows work for number 1,2,4,5,7
Explanation: number 3: as the pressure in the volume decreases, the volume increases causing it to expand and eventually blow.
number 6: because the temperature and the amount of gas don’t change, these terms don’t appear in the equation. What Boyle’s law means is that the volume of a mass of gas is inversely proportional to its pressure. This linear relationship between pressure and volume means doubling the volume of a given mass of gas decreases its pressure by half.
hope this helps :))
950 J of energy is used to heat an unknown mass of copper from 20.0° C to 95.0° C. The specific heat of copper = 0.39 J/(g·°C).
What is the mass of the copper?
Answer:
32g
Explanation:
I just took the test and got it right
The mass of the copper is approximately 32.5 grams.
To find the mass of the copper, we can use the formula for heat:
Q = m * c * ΔT
where Q is the heat energy, m is the mass, c is the specific heat, and ΔT is the change in temperature.
In this case, we are given:
Q = 950 J (heat energy)
c = 0.39 J/(g·°C) (specific heat)
ΔT = 95.0°C - 20.0°C
= 75.0°C (change in temperature)
Substituting these values into the formula, we can solve for the mass (m):
950 J = m * 0.39 J/(g·°C) * 75.0°C
Dividing both sides of the equation by (0.39 J/(g·°C) * 75.0°C), we get:
m = 950 J / (0.39 J/(g·°C) * 75.0°C)
m ≈ 32.5 g
Therefore, the mass of the copper is approximately 32.5 grams.
Learn more about Heat, here:
https://brainly.com/question/30403247
#SPJ2
A small, hard-shelled fossil that resembles a modern-day ocean organism was found
in the desert.
As
What can geologists conclude about this desert?
These shelled organisms migrated from the ocean to the desert.
Prehistoric man enjoyed eating shelled organisms in the desert.
A glacier once moved across the desert sands.
The desert was once covered by ocean water.
Answer:
The desert was one covered by ocean water.
Explanation:
What is the symbol and number of protons in Arsenci
Answer:
As 33
Explanation:
Symbol: As
Atomic Number/ Number of Protons: 33
what color is oxygen
Answer:
colourless
Explanation:
hope it helps
Price increases on goods in the economy signal producers to __________ production.
A.
stop
B.
increase
C.
decrease
D.
maintain
Answer:
C. decrease
Explanation:
Price increases on goods in the economy signal producers to decrease production.
Producers benefits more when the price of goods and services increases in the market. This makes them have more profit.
To maintain this profit level, they often decrease their production output to create a form of artificial scarcity within the market to sustain the price at which their goods trades.
If the producer increases the amount of goods they produce, this flux of goods can cause a decrease in price as the consumer is favored with a good bargaining power.Answer:
C
Explanation:
edge 2021
Which form of energy does a plant store when light is transformed during photosynthesis?
A.chemical energy
B.thermal energy
C.mechanical energy
D.electrical energy
Answer:
A. chemical energy
Explanation:
Given the reaction: 4NH3 + 502 4NO + 6H2O
What is the total number of moles of NO produced when
1.0 mole of O2 is completely consumed?
Answer:
[tex]\frac{4}{5}[/tex] moles
Explanation:
The reaction equation is given as:
4NH₃ + 5O₂ → 4NO + 6H₂O
The number of moles of O₂ that completely reacted is given as 1 mole
To solve this problem, we are going to use a stoichiometric approach from the balanced reaction equation:
5 moles of O₂ will react completely to produce 4 moles of NO
1 mole of O₂ will therefore react to produce x mole of NO
5x = 4
x = [tex]\frac{4}{5}[/tex] moles of NO
Answer: 0.80 mole
Explanation:
En un matraz, disponemos de 100 g de gas oxígeno que se encuentran a 1 at de presión y 273 K de temperatura. Calcular : a) el número de moles de gas oxígeno contenidos en el matraz ; b) el número de moléculas de oxígeno ; c) el número de átomos de oxígeno ; d) el volumen ocupado por el oxígeno. Masa atómica del oxígeno = 16.
Answer:
Explanation:
Dado que:
masa de oxígeno gaseoso = 100 g
presión = 1 atm
temperatura = 273 K
(a)
número de moles de oxígeno contenidos en el matraz = masa de oxígeno / masa molar de oxígeno
= 100 g / 16 gmol⁻¹
= 6.25 moles
(b) El número de moléculas de oxígeno es el siguiente:
Dado que 1 mol de oxígeno gaseoso contiene 6.023 * 10²³ moléculas de oxígeno.
Entonces, 6.25 moles contendrán:
= (6.25 × 6.023 * 10²³) moléculas de oxígeno.
≅ 3.764 × 10²³ moléculas de oxígeno.
(c) El número de átomos de oxígeno es:
= 2 × 3.764 × 10²³
= 7.528 × 10²³ átomos de oxígeno
(d) Usando la ecuación de gas ideal
PV = nRT
El volumen ocupado por el oxígeno = [tex]\dfrac{nRT}{P}[/tex]
Volumen ocupado por oxígeno = [tex]\dfrac{ 6.25 * 8.314 *273}{1}[/tex]
Volumen ocupado por oxígeno= 14185.76 m³
0.0721 moles of a compound have a mass of 31.008 grams. What is the molar mass?
(please show work and provide an explanation!)
Answer:
divide the moles by gram to get molar mass
use calculator and get yo ans
Calculate the maximum
mass of magnesium oxide
that can be made from
2.4g of magnesium and
2.4g of oxygen.
1
1
2Mg + 0, → 2Mgo
Answer:
Mass = 3 g
Explanation:
Given data:
Mass of magnesium = 2.4 g
Mass of oxygen = 2.4 g
Mass of magnesium oxide formed = ?
Solution:
Chemical equation;
2Mg + O₂ → 2MgO
Number of moles of oxygen:
Number of moles = mass / molar mass
Number of moles = 2.4 g/ 32 g/mol
Number of moles = 0.075 mol
Number of moles of magnesium:
Number of moles = mass / molar mass
Number of moles = 2.4 g/ 24 g/mol
Number of moles = 0.1 mol
now we will compare the moles of magnesium oxide with both reactant.
Mg : MgO
2 : 2
0.075 : 0.075
O₂ : MgO
1 : 2
0.1 : 2/1×0.1 = 0.2
Mass of magnesium oxide:
Mass = number of moles × molar mass
Mass = 0.075 mol × 40 g/mol
Mass = 3 g
1.Explain why the reactivity of group 7 decreases as you move down the group. Try to use the sentence starters here: When group 7 elements react, their atoms….
As you move down the group, the outer shells get…
Therefore the force of attraction between the shells and the nucleus is….
This makes attracting an extra electron…
Answer:
Explanation:
When group 7 elements react , their atoms gains one electron into their highest occupied energy level ( outer shell) to form single negative - charged ion .
As you move down the group , the outer shells get increased i.e an additional electron shell is added thereby increasing the atomic radius of the atom. The electrons in the outer shell move further away from the nucleus as we go down the group .
Therefore the force of attraction between the shells and nucleus is decreased .
This makes attracting an extra electron difficult . And so ability of the atom to attract electron to fill the outermost shell reduces which means the reactiveness of the atom reduces.
a book (m = 2 kg) is raised to a height of 1.5 m above the ground. Calculate the gravitational potential energy of the book.
Answer:
[tex]\boxed {\boxed {\sf 29.4 \ Joules }}[/tex]
Explanation:
Gravitational potential energy can be found using the following formula.
[tex]PE_g= m*g*h[/tex]
When m is the mass, g is the gravitational acceleration, and h is the height.
The book has a mass of 2 kilograms. It's height is 1.5 meters above the ground. Assuming this is on Earth, the gravitational acceleration is 9.8 m/s².
[tex]m= 2 \ kg \\h= 1.5 \ m \\g= 9.8 \ m/s^2[/tex]
Substitute the values into the formula.
[tex]PE_g=2 \ kg * 1.5 \ m * 9.8 \ m/s^2[/tex]
Multiply the first two numbers together.
[tex]PE_g=(3.0 \ kg*m)( 9.8 \ m/s^2)[/tex]
Multiply again.
[tex]PE_g=29.4 \ kg*m^2/s^2[/tex]
1 kilogram square meter per square second is equal to 1 Joule The answer we calculated is equal to 29.4 J[tex]PE_g= 29.4 \ J[/tex]
The gravitational potential energy of the book is 29.4 Joules.
A spray can is used until it is empty except for the propellant gas, which has a pressure of 1307 torr at 23°C. If the can is thrown into a fire (T = 477°C), what will be the pressure (in torr) in the hot can
Answer:
[tex]P_2=3312torr[/tex]
Explanation:
Hello!
In this case, since here we have a pressure-temperature relationship, we need to use the Gay-Lussac's law in order to compute the final pressure as they are in a directly proportional relationship:
[tex]\frac{P_2}{T_2} =\frac{P_1}{T_1}\\\\P_2= \frac{P_1T_2}{T_1}[/tex]
Now, we plug in the given pressure and temperatures in Kelvins to obtain:
[tex]P_2= \frac{1307torr*(477+273)K}{(23+273)K}\\\\P_2=3312torr[/tex]
Best regards!
Can someone help with part B asap
Well, simply put,
There is no Hydrogen Chloride being produced from this reaction, but instead it's Ammonium Chloride.
Describe how a measuring cylinder can be used to measure the volume of gas produced
3) Hubba Bubba Bubble gum
was $0.25 thirty years ago.
Today it costs $1.39. What is
the percent increase? Round
to the nearest hundredth (if
necessary).
tock
2.07
Explanation:
1.39/0.25 * 100% = 5.56%
Word equation for Silver being added to sulphuric acid
Answer:
See the answer below
Explanation:
When silver is added to dilute sulphuric acid, no reaction would occur. However, silver reacts with hot and concentrated sulphuric acid to produce silver sulphate, sulphur dioxide, and water.
The equation of the reaction is as below:
silver + sulphuric acid --> silver sulphate + water + sulphur dioxide
[tex]2Ag(s) + 2 H_2SO_4(aq) -->Ag_2SO_4 (s) + 2 H_2O (l) + SO_2 (aq)[/tex]
A neutral atom (atomic number > 1) has
(a) electron and proton
(b) neutron and electron
(c) neutron, electron and proton
(d) neutron and proton.
How many atoms of each element are in NH3 and CH4
Answer:N-1
H-3
C-1
H-4
Explanation:Nitrogen-1,Hydrogen-3(Ammonia),Carbon-1,Hydrogen-4(Methane).
3 common uses for salt
Answer:
Salt has long been used for flavoring and for preserving food. It has also been used in tanning, dyeing and bleaching, and the production of pottery, soap, and chlorine. Today, it is widely used in the chemical industry.
During ionic bonding, there is a transfer of electrons...
O from one metallic element to a different metallic element
O from one nonmetallic element to a different nonmetallic element
O from one metallic element to a different metalloid
O from one metallic element to a different nonmetallic element
Answer:
from one metallic element to a different nonmetallic element
Explanation:
For example NaCl is ionic compound in which Na metal donate electron to Cl non metal