Answer:
Kush would have been able to fight better and probably would have never been invaded by Egypt, and they could have beaten the Assyrians when they tried to takeover Egypt. And the 25th dynasty would have continued.
Explanation:
that is my explanation and answer^
An element has three isotopes. The masses and % abundances for the isotopes are: Isotope #1 mass 38.96 amu, % abundance=93.26%, Isotope #2 mass
39.96 amu, % abundance 0.012 %, and Isotope #3 mass= 40.96 amu, % abundance=6.73 %. The average atomic mass for this element has to be
Answer:
39.095
Explanation:
this is because all this isotopes belong to a single element thus
(38.96×93.26)+(39.96×0.012)+(40.96×6.73)
answer of that divided by 100%
A candle made of certain wax blend burns at a rate of 44.2 mg/min. What is the value of this burn rate if expressed in grams/hour
Answer:
2.652 g/h.
Explanation:
Burn rate (in mg/min) = 44.2 mg/min
Burn rate (in m/h) =?
We'll begin by converting 44.2 mg/min to g/min. This can be obtained as follow:
1 mg/min = 0.001 g/min
Therefore,
44.2 mg/min = 44.2 mg/min × 0.001 g/min / 1 mg/min
44.2 mg/min = 0.0442 g/min
Finally, we shall convert 0.0442 g/min to g/h. This can be obtained as follow:
1 g/min = 60 g/h
Therefore,
0.0442 g/min = 0.0442 g/min × 60 g/h / 1 g/min
0.0442 g/min = 2.652 g/h
Therefore, 44.2 mg/min is equivalent to 2.652 g/h.
Thus, the burn rate (in m/h) is 2.652 g/h.
Which sentence best describes a bond formed between two unlike atoms?
O A. The bond could form only between two atoms of very different
electronegativities.
O B. The electrons involved in the bond are shared equally between the
atoms.
O C. The bond could have been formed only as the result of ions
attracting each other.
D. The type of bond is determined by the difference in
electronegativity of the atoms.
The type of bond is determined by the difference in electronegativity of the atoms. Hence, option D is correct.
What is a bond?A chemical bond is what holds atoms together in molecules.
The ability of an atom to attract a pair of electrons in a chemical bond is called its electronegativity. The difference in electronegativity between two atoms determines how polar a bond will be.
Hence, option D is correct.
Learn more about bond here:
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30 Points!
Which of the following tasks falls under the responsibility of a forensic scientist?
Cleaning the crime scene after evidence has been collected
Making the final determination as to if a suspect is, in fact, guilty of the crime
Signing search warrants
Training officers in how to collect evidence
What information does a solubility table give?
A. It tells which compounds react with oxygen.
B. It tells which reactants are in the gaseous state.
O C. It tells which metals will replace other metals.
D. It tells which compounds will dissolve in water.
Answer:
Option D - It tells which compounds will dissolve in water.
Explanation:
It is used to predict whether or not a given ionic compound is soluble.
Answer:
d
Explanation:
The molecular weight of a gas that has a density of 7.10 g/L at 25.0 C and 1.00 atm pressure is g/mol.
A) 6.85× 10-2
B) 14.6
C) 28.0
D) 174
Answer:
D) 174 g/mol
Explanation:
Step 1: Given and required data
Density of the gas (ρ): 7.10 g/LTemperature (T): 25.0 °CPressure (P): 1.00 atmIdeal gas constant (R): 0.0821 atm.L/mol.KStep 2: Convert "T" to Kelvin
We will use the following expression.
K = °C + 273.15
K = 25.0°C + 273.15
K = 298.2 K
Step 3: Calculate the molecular weight (M) of the gas
We will use the following expression derived from the ideal gas equation.
ρ = P × M / R × T
M = ρ × R × T / P
M = 7.10 g/L × (0.0821 atm.L/mol.K) × 298.2 K / 1.00 atm
M = 174 g/mol
Given values:
Density, d = 7.10 g/LTemperature, T = 25.0°CPressure, P = 1.00 atmWe know the formula,
→ [tex]PV = nRT[/tex]
or,
→ [tex]PM = \frac{W}{V} RT[/tex]
or,
→ [tex]PM = dRT[/tex]
By substituting the values, we get
[tex]1\times M = 7.10\times 0.0821\times 298[/tex]
[tex]M = 7.10\times 0.0821\times 298[/tex]
[tex]=174[/tex]
Thus the answer i.e., "option D" is appropriate.
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The concentration of carbon dioxide in the atmosphere has been increasing for many years. How might this increase affect photosynthesis? (15 points if answered)
Answer:
Carbon dioxide concentrations are rising mostly because of the fossil fuels that people are burning for energy.
A 12.0% sucrose solution by mass has a density of 1.05 gem, what mass of sucrose is present in a 32.0-mL sample of this solution?
A) 0.126g
B) 3.66g
C) 4.03g
D) 3.84g
E) 280 g
Answer:
Option C. 4.03 g
Explanation:
Firstly we analyse data.
12 % by mass, is a sort of concentration. It indicates that in 100 g of SOLUTION, we have 12 g of SOLUTE.
Density is the data that indicates grams of solution in volume of solution.
We need to determine, the volume of solution for the concentration
Density = mass / volume
1.05 g/mL = 100 g / volume
Volume = 100 g / 1.05 g/mL → 95.24 mL
Therefore our 12 g of solute are contained in 95.24 mL
Let's finish this by a rule of three.
95.24 mL contain 12 g of sucrose
Our sample of 32 mL may contain ( 32 . 12) / 95.24 = 4.03 g
Predict the molecular structure (including bond angles) for each of the following.
a. PCl3
b. SCl2
c. SiF4
Answer:
PCl3 - trigonal pyramidal <109 degrees
SCl2 - bent<109 degrees
SiF4 - tetrahedral 109 degrees
Explanation:
The shape of all three molecules derive from a tetrahedral arrangement of electron pairs.
However, in PCl3 there is a lone pair of electrons on P and three bond pairs. This leads to the observance of a trigonal pyramidal geometry with bond angle <109 degrees.
In SCl2, there are four regions of electron density around S, two lone pairs and two bond pairs leading to a bent molecular geometry with bond angle <109 degrees.
In SiF4, there are four bond pairs and no lone pair. The molecular geometry is tetrahedral with a bond angle of 109 degrees.
If cells are restaurants, ribosomes are:
a. ingredients
b. chefs
c. diners
d.recipes
Answer:
Nvm the answer is for sure B. CHEFS
Explanation:
Answer:
BBBBBBBBBBBBBBBBBBB: CHEFS
what is made from a chemical reaction?
Answer:
the Product
Explanation:
If 6.63 g of CuNO3 is dissolved in water to make a 0.140 M solution, what is the volume of the solution in milliliters?
Answer:
377mL is the volume of the solution
Explanation:
A 0.140M solution of CuNO₃ contains 0.140 moles of CuNO₃ per liter of solution. Thus, we need to convert first the mass of CuNO₃ to moles using its molar mass and, with the moles available, we can find the volume of the solution, thus:
Moles CuNO₃ -Molar mass: 125.55g/mol:
6.63g * (1mol / 125.55g) = 0.0528 moles of CuNO₃.
Volume of solution:
0.0528 moles of CuNO₃ * (1L / 0.140 moles CuNO₃) = 0.377L
0.377L * (1000mL / 1L) =
377mL is the volume of the solutionMarkus was doing his chemistry homework and needed to find the
number of electrons in an atom of carbon. He looked at his periodic table
and saw that it had an atomic mass of 12 and the atomic number was 6.
What should his answer be?
Answer:
1869, the Russian chemist Dmitri Mendeleev came to prominence with his tabular ... He found that few of the new developments in the field of chemistry had made ... He corrected the known atomic masses of some elements and he used the ... Atomic number 101, Mendelevium, is named after the periodic table's architect
Explanation:
1869, the Russian chemist Dmitri Mendeleev came to prominence with his tabular ... He found that few of the new developments in the field of chemistry had made ... He corrected the known atomic masses of some elements and he used the ... Atomic number 101, Mendelevium, is named after the periodic table's architect
All solutions
are mixtures; but
all mixtures are
not solutions.
why?
All solutions are mixtures of two or more substances, but unless the mixture has a homogeneous distribution of solutes in the solvent, then the mixture is not a solution. Therefore, all mixtures are not solutions.
Mrs. Rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. Which combination could she use to produce the hydrogen she needs? NaOH and oil Zn and KOH H2SO4 and CaCO3 Mg and HCl
Answer:
Mg and HCI
Explanation:
The combination that she uses to produce hydrogen gas is:
d. Mg and HCl(Magnesium and Hydrochloric acid)
Production of hydrogen gas:When magnesium reacts with Hydrochloric acid, It leads to the formation of Magnesium chloride as a salt, and hydrogen gas is liberated.
[tex]Mg+2HCl--- > MgCl_2+H_2[/tex]
When a metal reacts with an acid, it leads to the liberation of hydrogen gas and the production of their respective salt.
Thus, option d is correct.
Find more information about Hydrogen gas here:
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Which one violates the octet rule?
Answer:
F1+ is the one that violates the octet rule
Explanation:
F1+ does not end up having 8 electrons in its valence shell, and there for violates the octet rule, for an atom to comply with the octet rule its charge must reflect the number of electrons it needs to gain or lose to make an octet, but F1+'s charge does not reflect the number of electrons it needs to be stable or have an electron configuration of a noble gas
Pro
∆G0=-RT in k Known as
Answer:
Gibbs free energy equation
Explanation:
Which graph shows the pressure-volume relationship expected for an ideal gas? (This is an illustration of Boyle's law.)
Question 11 options:
A)
Graph B
B)
Graph C
C)
Graph D
D)
Graph A
Answer:
D
Explanation:
The graph of Boyle's law is known as pressure-volume graph or PV curve. It is as follows:
As observed from the graph above, pressure increases with a decrease in volume, and vice versa. Thus, pressure is inversely proportional to volume. Other parameters (temperature and amount of gas) are constant in the graph above.
Volume is on the x-axis and pressure, on the y-axis. The equation of the curve is PV = k, which is the equation of Boyle's law. The curve is hyperbolic in nature having two asymptotes: P = 0 (horizontal) and V = 0 (vertical).
As volume tends to positive infinity, pressure tends to zero, and we get the horizontal asymptote, P = 0.
Horizontal asymptote, P=0
When volume approaches zero, pressure approaches infinity, and it results in the vertical asymptote, V = 0.
The graph which shows the pressure-volume relationship expected for an ideal gas is: C) Graph D.
Boyle's states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.
Mathematically, Boyle's law is given by the formula:
[tex]PV = k[/tex]
Where;
P is the pressure of an ideal gas.V is the volume of an ideal gas.For the illustration of Boyle's law using a graph, volume is represented on the x-axis while pressure is represented on the y-axis.
Generally, the graph of Boyle's law is a hyperbolic curve with two asymptotes:
P = 0 (horizontal axis).V = 0 (vertical axis).Find more information: https://brainly.com/question/1437490
In the life cycle, growth happens after:birth death decay reproduction
Answer:
Birth
Explanation:
Once your out of the wound you develop into a kid to a toddler, then a teen and so on
How many moles are in the 100,000g of CuSO4 • 5H2O ?
Answer:
try (107.87 amu)
Explanation:
Middle school science help please. ill give brainliest
Answer:
It converts The liquid into a gas at the same temperature.
Explanation:
Answer:
it converts the liquid into gas at the same temperature
Explanation:
when heat is added to a liquid at boiling temperature it converts the liquid into gas at that same boiling temperature
please give brainliest
The correct IUPAC name for the following molecule is: _________
a) trans-2,3-dichloro-5-methyl-2-hexene
b) trans-2,3-dichloro-5-methyl-3-hexene cis-2,3-dichloro-5-methyl-3-hexene
c) trans-4,5-dichloro-2-methyl-4-hexene cis-4,5-dichloro-2-methyl-4-hexene
Answer:
A.) trans-2,3-dichloro-5-methyl-2-hexene
Explanation:
The proposed question and structure has been attached to this answer.
The cis- and trans- isomers are used to denote the alignment of the functional groups to the carbon chain side. From the diagram, we see that:
the two chloro groups on the main compound are in opposite directions (-trans), and not the same sides (-cis)The bottom extended methyl group is on the 5th carbon as we count from left to rightthere's a total of 6 carbon atoms with 1 double bond on the second to third carbon.Hence the name trans-2,3-dichloro-5-methyl-2-hexene
A compound of a transition metal and iodine is 56.7% metal by mass.How many grams of the metal can be obtained from 630 g of this compound?
Answer:
357 g of the transition metal are present in 630 grams of the compound of the transition metal and iodine
Explanation:
In any sample of the compound, the percentage by mass of the transition metal is 56.7%. This means that for a 100 g sample of the compound, 56.7 g is the metal while the remaining mass, 43.3 g is iodine.
Given mass of sample compound = 630 g
Calculating the mass of iodine present involves multiplying the percentage by mass composition of the metal by the mass of the given sample;
56.7 % = 56.7/100 = 0.567
Mass of transition metal = 0.567 * 630 = 357.21 g
Therefore, the mass of the transition metal present in 630 g of the compound is approximately 357 g
The red outlined elements have what major characteristics in common?
1 point
Metals, Nonmetals, and Metalloids
One major characteristic they have in common is they are metals.
If 18.00 mL of 0.1000 M magnesium hydroxide reacts with 10.00 mL of hydrochloric acid, what is the molarity of the acid solution?
Answer:
0.36M HCl
Explanation:
The reaction of Mg(OH)₂ with HCl is:
Mg(OH)₂ + 2HCl → MgCl₂ + 2H₂O
Where 1 mole of magnesium hydroxide reacts with 2 moles of HCl
To solve this question, we need to find the moles of Mg(OH)₂ that reacted and, with chemical equation, solve for the moles of HCl and its molarity (Using the 10.00mL = 0.01000L) as follows:
Moles of Mg(OH)₂:
18mL = 0.018L * (0.100mol / L) = 0.0018 moles Mg(OH)₂
Moles HCl:
0.0018 moles Mg(OH)₂ * (2 moles HCl / mol Mg(OH)₂) = 0.0036 moles HCl
Molarity HCl:
0.0036 moles HCl / 0.0100L =
0.36M HClHow does mass affect a star's life cycle?
O A.
The greater a star's mass, the more likely it is to burn forever.
O B.
The greater a star's mass, the more likely it is to form planets.
O c.
The greater a star's mass, the more likely it is to fuse hydrogen.
D.
The greater a star's mass, the more likely it is to become a black hole.
Answer:
A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born. ... As the gas spins faster, it heats up and becomes as a protostar.Explanation:
Read this and then choose your options ✍️✍️In like manner, represent particle diagrams that account for the fact that one volume of hydrogen combines with one volume of chlorine to form hydrogen chloride. What do you suppose is the formula of hydrogen chloride?
Answer:
According to Avogadro's law which states that equal volumes of all gases under the same condition of temperature and pressure contain equal number of molecules. Therefore, one molecule of hydrogen reacts with one molecule of chlorine to yield two molecules of hydrogen chloride.
The formula of hydrogen chloride is HCl
The particle diagram is found in the attachment below.
Explanation:
The reaction between hydrogen and chlorine to form hydrogen chloride is represented by the equation below
H₂(g) + Cl₂(g) ---> 2HCl(g)
In the reaction equation above, one mole (or one volume) of diatomic hydrogen gas reacts with one mole (or one volume) of diatomic chlorine gas to form two moles (or two volumes) of hydrogen chloride gas. This is in accordance with Avogadro's law which states that equal volumes of all gases under the same condition of temperature and pressure contain equal number of molecules.
What do you have to do to break a molecule?
Answer:
Heat the molecule
Explanation:
Since most bonds require energy to form, they also give off energy when they are broken. But before most bonds break, the molecule has to be heated. Then the atoms start to move, and when they move too much, the bond breaks. Molecules that require less energy to break than they give off when broken are called fuels.
Humans have 50 pairs of chromosomes true or false
Answer:
False
Explanation:
humans have 23 pairs
How many atoms of carbon are present in the products?
6CO2+6H2O=C6H12O6+6O2
Answer:
2.41 * 10^24 atoms of carbon present in the products.
Explanation:
First, we need to find the moles of carbon in the products in order to find the number of atoms.
We see that in the chemical formula, carbon belongs to the compound known as glucose. To get the amount of moles of carbon, we need to divide my the amount of carbon within glucose (in grams) from the total amu ( or grams) of glucose to get the moles.
C6 = 72.066.
C6H12O6 = 180.156
72.066/180.156 = 0.4000199827 moles of Carbon within the Glucose compound
Now we will convert to atoms/molecules by multiplying the moles by avogadro's number..
0.4000199827 moles C * 6.022*[tex]10^{23}[/tex] = 2.408920336 *[tex]10^{24}[/tex] atoms of Carbon present in the products
*Note --> this can be estimated to 2.41 * [tex]10^{24}[/tex] atoms of Carbon
