Answer:
2a) 15 g/dm3
2b) 0.512 g/dm3
Explanation:
Use the concentration = mass/volume equation.
What type of mixture is Mayonnaise?
A. Homogeneous
B. Heterogeneous
C. Compound
D. Element
do all energy transfers lead to a phase change
Answer: Fusion, vaporization, and sublimation are endothermic processes, whereas freezing, condensation, and deposition are exothermic processes. Changes of state are examples of phase changes, or phase transitions. All phase changes are accompanied by changes in the energy of a system
Explanation:
How many total atoms in 5 mg(NO3)2
Answer:
5 Mg (magnesium), 2 N (nitrogen), and 6 O (oxygen) -- total of 13 atoms
There are 45 as 1 mg(NO3)2 = 9 atoms.
Which substances are most likely acids? Check all that apply. CH4, HI, NH3, HNO3, NaCI
What should you do with a chemical burn?
A. use butter on the burn, bandage, and send the employee home to rest
B. use ice on the burn, bandage, and send the employee to the hospital
C.do not touch the victim, keep the victim quiet and call for medical assistance
D. call for medical assistance and check the MSDS for emergency interventions
Answer:
C. do not touch the victim keep the victim quiet and call dor medical assistance
Answer:
D.
Explanation:
MSDS if available should have tx instructions once a call for emergency medical assistance has been made
write a detailed paragraph about how a volcano is formed. be sure to
include how density, convection currents, and plate tectonics all come
together to make a volcano.
Answer:
okay but give me brainliest
Explanation:
A volcano is formed when hot molten rock, ash and gases escape from an opening in the Earth's surface. The molten rock and ash solidify as they cool, forming the distinctive volcano shape shown here. As a volcano erupts, it spills lava that flows downslope. Volcanic flows are called lahars.
If you could only live in one climate forever, what climate would you choose?
Answer:
Explanation:
close to freezing cause once i go to bed my pillow will always stay cold and i can finally have all my blankets on and not over heat and not to mention when i play sports free air conditioning
How many grams of NaN3 are required to produce 283 L of nitrogen gas about the size of an automotive air bag, if the gas has a density of 1.25 g/L? Please answer ASAP
3.300
bc im right fgdfgdffffffffg
How many moles of I2 are in 8.23 moles of NaI ?
Answer: 4.12
Explanation:
we know that the given mol is 8.23 mol and they are 2NaI and I2 so we will write the equation like this.
8.23mol NaI x 1mol of I2 ÷ 2molNaI = 4.115≅ 4.12 mol of I2
we placed NaI at the bottom to cancel out with the 8.23 mol of NaI
Given the balanced equation below, how many moles of chromium are
produced? 2Cr2O3 + 3S1 --> 4Cr + SIO3
O A. 1 mole
B. 2 moles
O C. 3 moles
O D. 4 moles
2C_H. + 702 — 400, + 6H2O
How many moles of oxygen (O2) are required to produce
45.8 g of water (H20)?
Balanced Eqn
2
C
2
H
6
+
7
O
2
=
4
C
O
2
+
6
H
2
O
By the Balanced eqn
60g ethane requires 7x32= 224g oxygen
here ethane is in excess.oxygen will be fully consumed
hence
300g oxygen will consume
60
⋅
300
224
=
80.36
g
ethane
leaving (270-80.36)= 189.64 g ethane.
By the Balanced eqn
60g ethane produces 4x44 g CO2
hence amount of CO2 produced =
4
⋅
44
⋅
80.36
60
=
235.72
g
and its no. of moles will be
235.72
44
=5.36 where 44 is the molar mass of Carbon dioxide
hope this helps
Which of the following factors would affect the rate at which the stages of death happen
A.Humidity
B.Temperature
C.If the person was sick
D.All of the choice would affect the rate
Does pure water conduct electricity? if not, what can we do to make it conducting?
Explanation:
Pure water does not conduct electricity. This is because pure water do not contain any salts. Pure water can conduct electricity when common salt is added to it, as salt solution is conducting in nature.
what is the percent yield of carbon dioxide of 2.5 mole of oxygen react and 32.4 g of carbon dioxide are produced?
please help!!
Answer:
86
Explanation:
According to the concept of percent yield, the percent yield of carbon dioxide is 72.51%.
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .
In the given example, theoretical yield of carbon dioxide is as 32 g oxygen produces 44 g carbon dioxide,thus 32.5 g which is obtained by 2.5 moles of oxygen will require 32.5×44/32=44.68 g
Thus , on substitution in formula of percent yield, 32.4/44.68×100=72.51%.
Hence, the percent yield of carbon dioxide is 72.51%.
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PLZ HELP WILL BRAINLIEST
Balance the following equation: Fe2(SO4)3 + KOH --> K2SO4 + Fe(OH)3
Write the coefficients that you decide to balance the equation like this 3, 4, 3. If you do not add a coefficient in front of an element or compound, use a 1 in your answer. For instance the for this balanced equation: 2H2 + O2 --> 2H2O you would write your answer: 2, 1, 2
Answer:
6,3,2
Explanation:
Fe2(SO4)3 + 6 KOH = 3 K2SO4 + 2 Fe(OH)3
Please help me on this.
Answer: true
Explanation:
i hope this helps
Need help ASAP please and thank you
what is computer hardware in short?
Answer:
computer hardware is a collection of a physical part of a computer system
examples = CPU , monitor , mouse etc
Which of the following could not be an empirical formula? a CaO b CO2 c KCl d C6H12
Answer:
D. C6H12
Explanation:
An empirical formula means that the chemical formula of a compound has to be in it's simplest whole number form. In this case, D is not an empirical formula because it is able to be simplified to C3H6. All the other answers are simplified to the simplest whole number ratio. Think of it as a fraction being in simplest form.
Answer:
b CO2 is not an empirical formula.
At standard pressure, a sample of oxygen occupies 31 ml. What volume does the gas occupy when the pressure is 2 atm?
Answer:
I don't know
Explanation:
sorry I don't know
what is the mass in grams of 1.204x10^24 molecules of hydrogen gas (H2) ?
Answer:
4.03 g
Explanation:
The mass in grams of the hydrogen gas is 4.0 g
StoichiometryFrom the question,
We are to determine the mass in grams of the hydrogen gas.
First, we will determine the number of moles of hydrogen gas present.
Using the formula,
[tex]Number\ of\ moles =\frac{Number\ of \ molecules}{Avogadro's\ constant}[/tex]
From the given information,
Number of hydrogen molecules = 1.204 × 10²⁴ molecules
Thus,
Number of moles of hydrogen gas present = [tex]\frac{1.204 \times 10^{24} }{6.02 \times 10^{23} }[/tex]
Number of moles of hydrogen gas present = 2 moles
Now, for the mass of the hydrogen gas
Using the formula,
Mass = Number of moles × Molar mass
Molar mass of hydrogen gas = 2.016 g/mol
Then,
Mass of the hydrogen gas = 2 × 2.016
Mass of the hydrogen gas = 4.032 g
Mass of the hydrogen gas ≅ 4.0 g
Hence, the mass in grams of the hydrogen gas is 4.0 g
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On the periodic table, what is a group? For the main groups, what characteristic
do the elements have in common?
Answer:
The s-, p-, and d-block elements of the periodic table are arranged into 18 numbered columns, or groups. The elements in each group have the same number of valence electrons. As a result, elements in the same group often display similar properties and reactivity.
Explanation:
On the periodic table, a group refers to a vertical column of elements that share similar chemical properties.
For the main groups, the characteristic do the elements have in common is valence electron configuration and chemical reactivity.
On the periodic table, a group refers to a vertical column of elements that share similar chemical properties. These elements are arranged in such a way that they have the same number of valence electrons, which are the electrons in the outermost energy level (shell) of their atoms. The number of valence electrons is a critical factor in determining the chemical behavior and reactivity of elements, as it governs their ability to form chemical bonds with other elements.
Main group elements, also known as representative elements, are located in the s-block and p-block of the periodic table. These elements are found in Groups 1, 2, and 13 to 18. Each main group is labeled with a number from 1 to 18.
Here are the main characteristics that elements in the same main group (vertical column) have in common:
1. Valence Electron Configuration: Elements in the same main group have identical valence electron configurations. For example, elements in Group 1 (alkali metals) all have one valence electron in their outermost energy level (ns¹), while elements in Group 18 (noble gases) have a full outermost energy level.
2. Chemical Reactivity: Due to their identical valence electron configuration, elements in the same group show similar chemical reactivity. They tend to form similar types of chemical bonds and react similarly with other elements to achieve a more stable electron configuration.
3. Periodic Trends: Main group elements within a group exhibit predictable trends in their physical and chemical properties as you move from the top to the bottom of the group. For example, the atomic radius tends to increase, ionization energy tends to decrease, and metallic character tends to increase as you go down a group.
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Suppose you add water to 6 g of sugar to make a solution with a concentration of 3 g/l What is the total volume of the solution?
Answer:
no
Explanation:
In the future the universe will most likely
Answer:A
Explanation: The universe is always expanding at all times. It dosnt expand that much though, very little
Which formula equation represents the burning of sulfur to produce sulfur dioxide?
Answer
The balanced reaction that describes the reaction between sulfur and oxygen to produce sulfur dioxide is expressed S(s) + O2 (g) = SO2 (g). In many manufacturing plants, sulfur dioxide is furhter reacted to oxygen to form sulfur trioxide then added with water to produce sulfuric acid.
Explanation: The balanced reaction that describes the reaction between sulfur and oxygen to produce sulfur dioxide is expressed S(s) + O2 (g) = SO2 (g).
Answer:
The balanced reaction that describes the reaction between sulfur and oxygen to produce sulfur dioxide is expressed S(s) + O2 (g) = SO2 (g). In many manufacturing plants, sulfur dioxide is further reacted to oxygen to form sulfur trioxide then added with water to produce sulfuric acid.
1. In_____particles are in contact with each other.
Answer:
condensed matter should be your answer
Explanation:
5. What is characteristic of an opaque object.
In a chemical reaction*
1 point
The atoms of the reactants unbond, rearrange, and then rebond to form the products
Some atoms disappear while others multiply to form the products
The atoms of the reactants always stay together to form the products
New atoms are formed which combine to make the products
Answer:
1st one is correct
The atom of the reactants unbound , rearrange, and then rebond to form the product
hope it helps
In a chemical reaction, the atoms of the reactants unbond, rearrange, and then rebond to form the products. Therefore, option A is correct.
What is chemical reaction ?Chemical reaction, the transformation of one or more chemicals the reactants into one or more distinct compounds, the products. Chemical elements or chemical compounds make up substances.
Combustion reaction, decomposition reaction, neutralization reaction, redox reaction, precipitation or double-displacement reaction, and synthesis reaction are some of the numerous types of reactions.
In a chemical reaction, bonds between molecules of the reactant are broken and new bonds between molecules of the product are established to create a new substance.
A chemical equation is nothing more than a mathematical statement that represents how reactants form products.
Thus, option A is correct.
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(Help would be greatly appreciated) What is the molarity of 3 moles of HCl in 3 L of water?
1. 3M
2. 1M
3. 6M
4. 9M
Answer:
1 M
Explanation:
Molarity is moles per liter (mol/L).
You have 3 moles of HCl in 3 L of water. Divide the two values.
(3 mol)/(3 L)
= 1 mol/L
= 1 M
Solid aluminum metal reacts with chlorine gas to produce aluminum chloride crystals. How many grams of
aluminum chloride will be produced if the reaction begins with 135.0 g Al and 75.0 g chlorine gas? Write the balanced equation. Determine the limiting reactant and determine how much excess reactant will be left over. show your work.
56.8g of aluminum chloride will be produced if the reaction begins with 135.0 g Al and 75.0 g chlorine gas.
What is mass?A body's mass is an inherent quality. Prior to the discovery of a atom or particle physics, it was widely considered to be tied to the amount of matter inside a physical body. It was discovered that, despite having the very same quantity of matter in theory, different atoms and elementary particles have varied masses.
There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to acceleration in the presence of a net force can be measured experimentally as mass. The gravitational pull an object has on other bodies is also influenced by its mass.
2 Al + 3 Cl[tex]_2[/tex] → 2 Al C l[tex]_3[/tex]
mole of Al = 135.0/ 26=5.19mol
mole of Cl[tex]_2[/tex] = 75.0/ 35 =2.14 mol
mass of aluminum chloride = 56.8g
Limiting reagent = Al
excess reactant = Cl[tex]_2[/tex]
Therefore, 56.8g of aluminum chloride will be produced if the reaction begins with 135.0 g Al and 75.0 g chlorine gas.
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