Answer:
15.26 cm³
Explanation:
La densidad de una sustancia se define como su masa por unidad de volumen:
densidad = masa/volumen
Tenemos los siguientes datos de la barra de hierro:
masa = 160 g
volumen = 20,35 cm³
Por lo tanto, la densidad de la barra de hierro es:
densidad = 160 g/20,35 cm³ = 0.786 g/cm³
El volumen de 12 gramos de hierro se calcula utilizando el dato de masa (12 g) y la densidad calculada:
densidad = masa/volumen ⇒ volumen = masa/densidad
= 12 g/(0.786 g/cm³)
= 15.26 cm³
At what power of ten does the entire solar system come into view
Answer: 10,000,000,000 kilometers
Explanation:
All the planets in our solar system come into view. But at this distance, only Jupiter and Saturn would be visible with the naked eye.
please someone help it’s due today(I will give brainliest)
Answer:
physical or chemical
boiling point
brittleness
opacity
color
density
ductility
shape
hardness
lustre
malleability
melting point
smell
solubility
state of matter
taste
texture
viscosity
Explanation:
difference between solute and solvent
When one substance dissolves into another, a solution is formed. A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.
Explanation:
solute are substance that dissolve in solvent
solvent are substance that dissolve solute
Write the formula for potassium nitride?
(show work)
CAN SOMEONE PLEASE HELP?
Answer:
It should b KNO3
Explanation:
one Potassium (K) and three Nitrite (NO3)
How does the chemical formula for the sulfite ion differ from the chemical formula for the sulfate ion?
O sulfite contains 2 oxygens and sulfate contains 3 oxygens
O sulfite contains 3 oxygens and sulfate contains 2 oxygens
O sulfite contains 3 oxygens and sulfate contains 4 oxygens
O sulfite contains 4 oxygens and sulfate contains 3 oxygens
Answer:
Sulfite contains 3 oxygens and sulfate contains 4 oxygens
Explanation:
If the molecular mass of a substance is 7.304 • 10²³ g, find its molar mass.
Answer:
1.213 g/mol
Explanation:
We are given that the molecular mass is 7.304 × 10²³ g.
From avogadro's number, we know that;
1 mole of a substance = 6.022 × 10²³ molecules
Thus;
Molar mass = molecular mass/avogadro's number = (7.304 × 10²³)/(6.022 × 10²³) = 1.213 g/mol
Find the amount of water containing 14.02 * 10²⁴ molecules
Answer:
14.02 x 10²⁴ molecules
Explanation:
To solve this problem we will use Avogadro's number: It relates to the number of molecules (or atoms) contained in 1 mol of any given substance:
14.02 x 10²⁴ molecules ÷ 6.023 x 10²³ molecules/mol = 23.28 molesThus, 23.28 moles of water contain 14.02 x 10²⁴ molecules.
Help me with this please
= 0.2+560.66JK-2eF
use this app : Photomath
It will help you :)
5.
Given: C2H5C1
P1: 951.72 kPa
P2: 362.29 kPa
T1: 653.34 K
Wanted: kelvins?
Answer: The final temperature is 248.7 K
Explanation:
To calculate the final temperature of the system, we use the equation given by Gay lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant volume.
Mathematically,
[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]
where,
[tex]P_1\text{ and }T_1[/tex] are the initial pressure and temperature of the gas.
[tex]P_2\text{ and }T_2[/tex] are the final pressure and temperature of the gas.
We are given:
[tex]P_1=951.72kPa\\T_1=653.34K\\P_2=362.29kPa\\T_2=?[/tex]
Putting values in above equation, we get:
[tex]\frac{951.72}{653.34}=\frac{362.29}{T_2}\\\\T_2=248.7K[/tex]
Thus the final temperature is 248.7 K
Using the formula :Force × Distance = Work Perfomed , Match the Force × Distance problems with their correct Work Performed answer?
The process by which organisms makes more
organisms like themselves is called
Answer:
Reproduction
Explanation:
Reproduction is the biological process by which new “offspring” (like organisms) are produced from their “parents" (the original organism)
First question and I'm already stuck. Help pls!
Answer:
definite volume. indefinite shape
Answer:
Red
Explanation:
Definite volume, indefinite shape
What type of solution is seltzer water? a liquid-liquid b metal-liquid c gas-liquid
Answer:
(I think its mixture not solution)
Explanation:
Multiphase Mixtures
Carbonated water (or carbonated anything) is a multiphase heterogenous mixture, with gaseous carbon dioxide (CO2) bubbling through liquid water (H2O).
Answer: The answer is C. Gas-Liquid
Explanation: I just took the quiz
i really need help with this
Answer:
the process shown here is endocytosis.
Explanation:
endocytosis is a process of taking something inside the cell..
Periodic law states that elements show a
A. repetition of their physical and chemical properties when arranged according to increased atomic number
B. repetition of their physical and chemical properties when arranged according to increased atomic mass
C. repetition of their physical and chemical properties when arranged according to increased atomic size
D. repetition of their physical and chemical properties when arranged according to increased atomic radius
Answer:
A. repetition of their physical and chemical properties when arranged according to increased atomic number
Explanation:
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, option A is correct option.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.
Periodic law states that elements show a repetition of their physical and chemical properties when arranged according to increased atomic number.
Therefore, the correct option is option A out of given options.
Learn more about periodic table, here:
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how many atoms are in 1.2x10^5 moles of neon?
Answer:
7.224 × 10^28 atoms
Explanation:
The number of moles contained in a substance (n) can be calculated from this expression:
nA = n × 6.02 × 10^23 atoms
Where;
nA = number of atoms of substance
n = number of moles of substance
Avagadro's number or constant = 6.02 × 10^23 atoms
Using nA = n × 6.02 × 10^23 atoms
In this question, there are 1.2 x 10^5 moles of neon (N). The number of atoms (nA) is as follows:
nA of neon = 1.2 x 10^5 × 6.02 × 10^23
nA = 7.224 × 10^ (5 + 23)
nA = 7.224 × 10^28 atoms
The number of neon atoms in 1.2 x 10^5 is 7.224 × 10^28 atoms.
What is evolution?
1. Quick change in an organism to eat better
2. A change in the environment
3. Gradual change in the environment due to global warming
4. Gradual change of a species to be better suited for the environment
Answer:
The correct answer is option 4.
Answer:
4 Gradual change of a species to be better suited for the environment
Explanation:
PLEASE ANSWER QUICK... WILL GIVE BRAINLIEST
The relative humidity is 100%, and the temperature is hot. In a few sentences, explain how the weather would change if the temperature drops and becomes cool.
Answer:
Humdity would decrease hence temprature would do the same, hence tundra are called deserts at times.
Explanation:
If you keep on decreasing the temperature without changing the air's moisture content significantly, eventually you'll reach 100 percent relative humidity, and then water vapor will start to condense to form dew.
What happens when humidity is at 100% and the temperature drops?Dew Point. When the relative humidity reaches 100 percent, dew forms. Dew point refers to the temperature at which air reaches saturation by water molecules. Warmer air can hold more water molecules, and as that warm air cools, it loses water vapor in the form of condensation.
What happens when it reaches 100% relative humidity?When relative humidity reaches 100 percent or is saturated, moisture will condense, meaning the water vapor changes to liquid-vapor. Thus, the saturation level of air is related to the air's temperature.
Learn more about relative humidity here https://brainly.com/question/21494654
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4 points
What is the volume of an object with a density of 5.20 g/cm3 and a mass
of 6.00 x 10^2? g?
how do humans impact the distribution of minerals?
Answer:
With our modern tools and increased rate of mining industries being built, id say we deal a big impact on mineral exportation.
Explanation:
What are the sex cells of the plants that Mendel studied?
Answer:
alleles
Explanation:
Answer:
ghbdjdbdhdbdbdndjfbfnfnfjfbfjskssks
ijdij
Explanation:
jsjj
A chemical reaction that is expected to form 325.0 gof product only forms 123.8 g of product. What is the percent yield of this reaction?
38.1%
61.9%
201.2%
262.5%
Answer:
[tex]\boxed {\boxed {\sf A. \ 38.1 \%}}[/tex]
Explanation:
Percent yield is the ratio of the amount actually produced to how much could theoretically be produced. It is found using this formula:
[tex]\% \ yield = \frac{actual \ yield}{theoretical \ yield} *100[/tex]
For this reaction, the theoretical or expected yield is 325.0 grams. The actual yield is 123.8 grams.
[tex]\% \ yield = \frac{ 123.8 \ g }{325.0 \ g }*100[/tex]
Divide.
[tex]\% \ yield = 0.380923077 *100[/tex]
[tex]\% \ yield = 38.0923077[/tex]
Round to the nearest hundredth. The 9 in the hundredth place tells us to round the 0 to a 1 .
[tex]\% \ yield \approx 38.1[/tex]
The percent yield is about 38.1%
Answer:
38.1%
Explanation:
When calcium chloride and baking side is mixed, is it an example of chemical or physical change?
I WILL GIVE YOU BRANILY PLS
Answer:
what dose this even mean?
Explanation:
The solubility of substance (Z) is 40g/100ml of water at 25°C. A)Can you
make a saturated solution if you add 120 g. of (Z) to 450ml of water at
25°C?
-
can anyone help me?!!!??!?!
Answer:
No, It would be a unsaturated solution
Explanation:
The solubility of a compound gives us information about how a compound may dissolve or not in a determinate solvent.
In this case we have Z, which in 25 °C the solubility of this compound is 40g/100 mL water. This means that if we have 60 g of Z and try to dissolve it in 100 mL of water, only 40 g of Z will solve and the remaining 20 g will be in the water as precipitate or remaining solid.
Now if you just put 40 g of Z in 100 mL water, it will dissolve completely in water, and in this case, we have a saturated solution. A saturated solution is when you dissolve a determinated quantity of a solute in a determinated quantity of solvent, without remaining of solid or excess of solvent.
According to this explanation, we now have 120 g of Z. To make a saturated solution of Z with this quantity, well, let's do math. If 40 g dissolves in 100 mL, then 80 g would be 200 mL and 120 g would have to be 300 mL of water. But in this case, we have 450 mL of water, we have more than 300 mL, an excess of water, so, the 120 g will dissolve but it's dissolved in more than the needed quantity to be a saturated solution, therefore, we have an unsaturated solution of Z (more solvent than the needed).
Hope this helps.
Which federal agency makes sure federal wildlife laws are followed?
US Forest Service
US Fish and Wildlife Service
Bureau of Land Management
National Park Service
Answer:
us fish and wildlife service
Explanation:
the 2nd choice
Answer:
US Fish and Wildlife Service
Which statements reflect the process of electrolysis? Check all that apply. Water is formed from ions of hydrogen and oxygen. The electrical reactions in a rechargeable battery can be reversed. The cathode becomes the electrode for reduction. The cathode takes on the metal deposits or layers. Decomposition of ores produces separated elements. Decomposition of ores produces low energy products.
Answer:
Decomposition of ores produces separated element.
Answer: it’s b, d, and e
Explanation: i just did it, hope this helps :)
Calculate the standard enthalpy of reaction
for the reaction 2 Na (s) + 2 H₂O (l)
2 NaOH (aq) + H₂ (g), Standard enthalpies
formation are -285.8 kJ/mol for H₂O and -470. 11 kJ/mol for NaOH (aq).
Answer:
-368.62 kJ/mol
Explanation:
[(2 x - 470.11 kJ/mol) ( 0kJ/mol)] - [ 2 x -285.8 kJ/mol) (2x 0 kj/mol)] = -368.62 kJ/mol
Which of the following is a property of a non-metal.
luster
ductile
malleable
does not conduct heat and electricity
Answer:
luster
:/:/:/:/:::/:::
1s2, 2s2, 2p6, 3s2, 3p6, 4s2
After this atom gains or loses valence electron/s, what will the oxidation number be?
Answer:
if it gains then it will be negative to whatever number it has gained and the reverse for when it loses
Explanation:
