A cart with the weight was already moving lefgt with a constant speed when the two forces shown were applied to the car. How do the two forces affect the motion of the cart?
Explanation:
the cart will be slowed down because the weight was added to the right the cart won't stop for about 10 seconds. there will be a lot of pull and friction therefore the cart slows down drastically
What is the molarity of a solution in which 0.321 g of calcium chloride is dissolved in 1.45 L water?
Answer:
Molarity = 0.002 M
Explanation:
Given data:
Mass of calcium chloride = 0.321 g
Volume of water = 1.45 L
Molarity of solution = ?
Solution:
Molarity = number of moles / volume in litter.
We will calculate the number of moles of calcium chloride first.
Number of moles = mass/molar mass
Number of moles = 0.321 g/ 110.98 g/mol
Number of moles = 0.003 mol
Molarity:
Molarity = 0.003 mol / 1.45 L
Molarity = 0.002 M
The student carried out three titrations. The results are shown below (pic)
Use the student's concordant results (those within 0.10 cm of each other)
to work out the mean volume of sulfuric acid added.
Answer:
yes
Explanation:
Which of the following indicates that a chemical reaction system has reached equilibrium?
a)the temperature of the system is increasing.
b)the concentration of reactants is decreasing.
c)the temperature of the system is decreasing.
d)the concentration of products is constant
the volume of the system is changing.
Find the mass of 5.82 mol of MgCl2. Round to the nearest tenth.
Answer:
554.13 grams
Explanation:
The mass of 5.82 mol of MgCl2 is 552.9g. Details about how to calculate mass can be found below.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass.
According to this question, there are 5.82 moles of MgCl2. The mass is calculated thus:
molar mass of MgCl2 = 24 + 35.5(2) = 95g/mol
mass of MgCl2 = 95g/mol × 5.82 moles
mass of MgCl2 = 552.9g
Therefore, the mass of 5.82 mol of MgCl2 is 552.9g.
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Saturated hydrocarbons are major components of
○ vegetable oil.
○ alcohol
○ gasoline
○salt crystals
Saturated hydrocarbons are major components of gasoline. The correct option is C.
What are saturated hydrocarbons?Saturated hydrocarbons are those hydrocarbons in which the carbon atoms is attached with hydrogen atom with only single bond. They are the simplest form of hydrocarbons. Much hydrogen is attached to one carbon.
Thus, the correct option is C, gasoline.
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Saturated hydrocarbons are major components of gasoline.
What are saturated hydrocarbons?Alkanes are saturated hydrocarbons, chemical molecules with solitary carbon-atom bonds. Petroleum, natural gas, and coal contain them, as do many industrial and home items. Heating, cooking, and transportation employ saturated hydrocarbons, which burn easily. They are less reactive than unsaturated hydrocarbons because they lack double or triple bonds.
Saturated hydrocarbons are CnH2n+2, where n is the number of carbon atoms. Methane (CH4), a colourless, odourless gas, is the simplest alkane. Tetracontane (C40H82), a solid at ambient temperature, is the biggest. The structure and amount of carbon atoms of saturated hydrocarbons determine their physical and chemical characteristics.
Saturated hydrocarbons make polymers, rubber, and solvents. Lubricants, cosmetics, and pharmaceuticals utilise them. Saturated hydrocarbons emit greenhouse gases when burned, leading to global warming and climate change.
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The half-life of carbon 14 is 5,730 years. How much would be left of an original 50-gram sample after 2,292 years
Answer:
37.9g of carbon 14 remains
Explanation:
The radioactive decay of an atom follows the equation:
Ln[A] = -kt + Ln[A]₀
Where [A] is amount of isotope after time t, k is decay constant and [A]₀ initial amount of the isotope.
We can find k from half-life using:
k = ln 2 / Half-Life
k = ln 2 / 5730 years
k = 1.2097x10⁻⁴ yrs⁻¹
Replacing in the equation all values:
Ln[A] = -1.2097x10⁻⁴ yrs⁻¹*2292yrs + Ln[50g]
Ln[A] = 3.635
[A] = 37.9g of carbon 14 remains
What would the mass be, in grams, of 0.89 moles of Cl2?
Answer:
Mass = 63.19 g
Explanation:
Given data:
Number of moles of Cl₂ = 0.89 mol
Mass in gram = ?
Solution:
Formula:
Mass = number of moles × molar mass
Molar mass of Cl₂ = 71 g/mol
by putting values,
Mass = 0.89 mol × 71 g/mol
Mass = 63.19 g
Triassic, Jurassic, and Cretaceous: these are also divisions of the Mesozoic Era
Answer:
correct
Explanation:
thanks for being a smarty pants
Which of the following is an example of a situation in which an egg is receiving thermal energy through convection?
A. The egg is kept warm by its mother in the nest
B. An egg cracked on a hot sidewalk starts to cook
C. The egg is hard boiled in a pot of water
D. A metal pan on the stove fries the egg
It is easy to know what someone is thinking by the way the behave (act):
TRUE
FALSE
12. What is the mass number of an atom that has 4 protons, 4 electrons, and 5 neutrons?
Answer:
9
Explanation:
mass number = protons + neutrons
= 4 + 5 = 9
You are given 100 g of a compound. The compound is composed of 37% hydrogen and 63% oxygen. How many grams of hydrogen are present in the 100 g sample?
Select one:
a. 37 g
b. 27 g
c. 100 g
d. 63 g
There are 37 grams of hydrogen present in the 100 g sample given that compound is composed of 37% hydrogen and 63% oxygen.
MASS OF AN ELEMENT:
According to this question, a compound is said to be composed of 37% hydrogen and 63% oxygen.
This means that in 100g of the compound, its elemental constituents are as follows:
H = 37/100 × 100O = 63/100 × 100This means that hydrogen will contain 37g in 100g of the given compound.
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True or False. A producer is a heterotrophic organism that consumes other organisms for nutrients and energy.
Answer:
True.
Explanation:
what is the correct answer ??
Answer:
Quantum mechanical which is described by the Greek letter phi that describes how energy is transmitted as electrons change or jump from one shell to the nextWhich of these are matter?
atoms
molecules
energy
The atoms and molecules are matter. Therefore, option A and B are correct.
What is matter ?Matter is defined as anything that occupies space and has mass—in other words, the "stuff" of the universe. All matter is composed of substances known as elements, which have distinct chemical and physical properties and cannot be broken down into other substances via ordinary chemical reactions.
Matter is defined as anything that occupies space and has mass. Water and air are examples of matter, whereas feelings and sound are not.
Physical and chemical properties can be used to classify matter. Matter is defined as something that occupies space and has mass. Solid, liquid, and gaseous are the three states of matter. The conversion of a material from one state of matter to another without changing its chemical composition is referred to as a physical transition.
Thus, option A and B are correct.
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How are the atoms of group 16 elements become
stable?
A- By losing two electrons
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729 41982
B - By gaining two electrons
C - By losing six electrons
D - By gaining six electrons
Answer:
B - by gaining 2 electrons
Explanation:
Answer:
The atoms of group 16 elements become
stable by gaining two electrons.
when a car goes around a curve at a constant speed, in which direction is it accelerating
A. In the direction of the velocity
B. In the opposite direction of the velocity
C. Outside the curve
D. Inside the curve
Pls help I’m about to cry I cant do this it’s due in ten min
Answer:
C
Explanation:
When a dentist has you do xrays there are waves thats what the vest is for
How many moles are equal to 89.23g of aluminum chloride, AlCl3?
Answer:
[tex]\boxed {\boxed {\sf 0.6692 \ mol \ AlCl_3}}[/tex]
Explanation:
To convert from grams to moles, we must use the molar mass. This can be calculated using the Periodic Table.
1. Molar Mass
First, identify the elements in the compound AlCl₃. They are aluminum and chlorine. Now find the masses:
Al: 26.981538 g/mol Cl: 35.45 g/molTake a look at the compound. There is a subscript of 3 after chlorine, so we must multiply its molar mass by 3 then add aluminum's.
AlCl₃= 3(35.34 g/mol) + 26.981538 g/mol = 133.331538 g/mol2. Convert Grams to Moles
We can use the molar mass as a ratio.
[tex]\frac{133.331538 \ g \ AlCl_3}{1 \ mol \ AlCl_3}[/tex]
Multiply by the given number of grams: 89.23
[tex]89.23 \ g \ AlCl_3 * \frac{133.331538 \ g \ AlCl_3}{1 \ mol \ AlCl_3}[/tex]
Flip the fraction so the grams of aluminum chloride cancel out.
[tex]89.23 \ g \ AlCl_3 * \frac{1 \ mol \ AlCl_3}{133.331538 \ g \ AlCl_3} = 89.23 \ * \frac{1 \ mol \ AlCl_3}{133.331538}[/tex]
[tex]\frac{89.23 \ mol \ AlCl_3}{133.331538}[/tex]
[tex]0.6692340112 \ mol \ AlCl_3[/tex]
3. Round
The original measurement of grams has 4 significant figures. We must round to 4 sig figs.
For the number we calculated, that is the ten thousandth place.
The 3 in the hundred thousandth place tells us to leave the 2.
[tex]0.6692 \ mol \ AlCl_3[/tex]
There are about 0.6692 moles of aluminum chloride in 89.23 grams.
Most of the energy that drives the water cycles comes from which of the following?
O The sun
O Earth's core
O Earth's oceans
O The equator
2AlF3 + 3K2O → 6KF + Al2O3
How many grams of AlF3would it take to make 15.524 g of KF?
?g AlF3 (use 5 sig figs)
7.4797 g AlF₃
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Stoichiometry
Reading a Periodic TableUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN] 2AlF₃ + 3K₂O → 6KF + Al₂O₃
[Given] 15.524 g KF
Step 2: Identify Conversions
[RxN] 6 mol KF = 2 mol AlF₃
Molar Mass of K - 39.10 g/mol
Molar Mass of F - 19.00 g/mol
Molar Mass of Al - 26.98 g/mol
Molar Mass of KF - 39.10 + 19.00 = 58.1 g/mol
Molar Mass of AlF₃ - 26.98 + 3(19.00) = 83.98 g/mol
Step 3: Stoichiometry
Set up: [tex]\displaystyle 15.524 \ g \ KF(\frac{1 \ mol \ KF}{58.1 \ g \ KF})(\frac{2 \ mol \ AlF_3}{6 \ mol \ KF})(\frac{83.98 \ g \ AlF_3}{1 \ mol \ AlF_3})[/tex]Multiply/Divide: [tex]\displaystyle 7.47966 \ g \ AlF_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 5 sig figs.
7.47966 g AlF₃ ≈ 7.4797 g AlF₃
Identify the type of the following chemical reaction.
Answer:
Hydrolysis reaction
Explanation:
A student in your class has decided to dissolve Epsom salts in water and observe the crystals that are left behind after the water evaporates. Is this an example of a chemical change? Use evidence and scientific reasoning to support your claim.
Answer:
Physical change
Explanation:
Dissolution of salt in water is a typical example of physical change and not a chemical change.
In a chemical change new products are formed which are different from the reactants.
In a physical change, the state of matter changes from one form to another.
Since this is a change in state, a physical change has occurred. Also, the reaction is easily reversible simply by evaporation. Most chemical changes are not easily reversible.Dissolving epsom salts in water and observing the crystals that are left behind after the water evaporates is not a chemical change.
CHEMICAL CHANGE:
Changes that occur in nature can either be physical or chemical. Physical change are those changes that does not involve the chemical property of substances involved. Chemical change, on the other hand, alters the chemical composition of the substances involved. Examples are rusting. Chemical change forms a new product and are usually irreversible. According to this question, dissolving epsom salts in water is not an example of chemical change because it does not involve the formation of new substances.Learn more at: https://brainly.com/question/23693316?referrer=searchResults
student plans to isolate chlorophyll, mix it in a solution of carbon dioxide and water, and then shine light on the mixture. Do you predict glucose will be produced inside the mixture
Answer:
No
Explanation:
In order for glucose to be produced inside the mixture, photosynthesis has to take place. The photosynthetic process requires a series of steps within an organelle called the chloroplast. The chloroplast contains the chlorophyll and other enzymes that are necessary for photosynthesis.
Once the chlorophyll is isolated, it becomes separated from the enzymes necessary for the completion of photosynthesis, and the process is truncated. When light is shined on the mixture, the majority would instead be lost as heat while some cause the chlorophyll molecules to glow.
Is corona increasing or decreasing the albedo effect? Explain.
Answer:
corona is increasing
.......
Explanation:
.....
need help, no idea what to do
The volume of unreacted Oxygen = 1.25 L = 1.25 dm³ = 1250 cm³
Further explanationGiven
Combustion of propane
3.6 L CO2
7.25 L O2
Required
The volume of unreacted oxygen
Solution
Reaction
C₃H₈ + 5O₂ ⇒ 3CO₂ + 4H₂O
Avogadro's :
In the same T,P and V, the gas contains the same number of molecules
So the ratio of gas volume will be equal to the ratio of gas moles
Vol O₂ = 5/3 x vol CO2 = 5/3 x 3.6 = 6 L
The unreacted : 7.25 - 6 = 1.25 L
Which is a characteristic of all ions?
They are metals.
They have a charge.
They are made of two or more types of atoms.
They form chemical bonds through electron sharing.
Answer:
D. They form chemical bonds through electron sharing.
Explanation:
The correct characteristic of all ions is that they have a charge. Therefore option B is correct.
An ion is an atom or a molecule that has gained or lost electrons, resulting in an unequal number of protons and electrons. This imbalance of positive and negative charges gives the ion a net electrical charge.
Ions can have a positive charge (called cations) if they have lost electrons, or a negative charge (called anions) if they have gained electrons.
The charge of an ion is essential in determining its behavior and interactions with other ions and molecules. It influences the way ions form chemical bonds and participates in chemical reactions.
The charge of an ion is indicated by a superscript after the chemical symbol, such as Na+ for a sodium cation or Cl- for a chloride anion.
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Chemistry. Question is on photo. Will mark Brainy for whoever gets this right.
Answer:
49.18 eV hope this helps
b. How many grams of CO2 are produced from 36
grams of CH4?
Answer:
Ch4 G +2o2 g co2 G +2h2o g How many moles of methane are required to produce 22 g co2 G after combustion
Explanation:
it's 22 grams..
hope the answer was helpful ....