Answer:
Mass = 889.8 g
Explanation:
Given data:
Mass of Mg(NO₃)₂ required = ?
Volume of solution = 1.5 L
Molarity of solution = 4 M
Solution:
we will calculate the number of moles from molarity formula then we will calculate the mass from number of moles.
Formula:
Molarity = number of moles / Volume in L
4 M = number of moles / 1.5 L
Number of moles = 4 M× 1.5 L
Number of moles = 6 mol/L × L
Number of moles = 6 mol
Mass of Mg(NO₃)₂:
Mass= number of moles ×molar mass
Mass = 6 mol × 148.3 g/mol
Mass = 889.8 g
if you have 0.5 grams of CaCl2 dissolved to make 15mL of solution, what is the molarity of the solution?
Answer:
0.3M
Explanation:
Molarity of a solution is given by;
M=n/v
Where;
n= number of moles of solute = mass of solute / molar mass
v= volume of solution
n= mass of CaCl2 / molar mass of CaCl2
Mass of CaCl2 = 0.5
Molar mass of CaCl2 = 40 + (2×35.5)
= 111g/mol
n = 0.5/111 = 0.0045mol
volume, v= 15mL = 15/1000 L = 0.015L
Note that molarity is in mole per liter, hence we convert 15mL to L. 1mL=1/1000L
M =0.0045/0.015
M=0.3mol/L
Therefore, the molarity of the solution is 0.3M
C. Which molecule is not linear?
a H₂O
b. CO₂
c. N₂
d. Cl₂
Answer:
I think the answer is
(H2O) water molecule
If an atom has 17 protons, 14 neutrons, and 20 electrons, what is the atom's electrical charge?
A. -3
B. -4
C. +4
D. -7
Answer:
-3
Explanation:
Which statements describe the inner planets?
Complete Question:
Which statements describe the inner planets? Select three options.
A. Uranus is one of the inner planets.
B. Mercury is one of the inner planets.
C. The inner planets are also called terrestrial planets.
D. The inner planets are larger than the outer planets.
E. Gases escaped from them during the planets’ formation.
Correct Option:
The statements which describe the inner planets are as follows:
B. Mercury is one of the inner planets.
C. The inner planets are also called terrestrial planets.
D. Gases escaped from them during the planets’ formation.
Explanation:
We have the smallest planet in the inner solar system - Mercury, Venus, Earth and Mars, which are so identified for being near to the Sun. A terrestrial planet, a telluric planet, or a rocky planet is a world made up predominantly of rocks of silicate or metal. The outer planets in the solar system are the nearest inner planets to the Earth.
The planets inside are smaller than the outer planets. When the fusion began on the Sun a huge seismic eruption would have originated from the Sun's core and erupted externally. It produced a concussion wave that washed away the inner planets' thick gaseous atmospheres, just like a candle flame bursts out of its wick when you unexpectedly blow.
Vitamin A is a very large organic molecule composed of twenty atoms
of carbon, one atom of oxygen and thirty atoms of hydrogen. How
many atoms total are in TWO molecules of vitamin A.
Select one:
84
68
34
102
Answer:
102
Explanation:
(20+1+30)*2
you add the total number of atoms that can be found in one molecule of vitamin A then multiply by 2
Final answer:
To find the total number of atoms in two molecules of vitamin A, we multiply each type of atom by two and add the totals together, resulting in 102 atoms.
Explanation:
The question is asking to calculate the total number of atoms in two molecules of vitamin A, based on the given composition of one molecule of vitamin A. According to the question, a single molecule of vitamin A contains 20 carbon atoms, 30 hydrogen atoms, and 1 oxygen atom. To find the total number of atoms in two molecules, we simply multiply the number of each type of atom by two and then add up the totals.
For carbon: 20 atoms × 2 = 40 atoms
For hydrogen: 30 atoms × 2 = 60 atoms
For oxygen: 1 atom × 2 = 2 atoms
Adding these together gives us:
40 (carbon) + 60 (hydrogen) + 2 (oxygen) = 102 atoms
Which elements make up a water molecule?
hydrogen and nitrogen
oxygen and nitrogen
oxygen and carbon
hydrogen and oxygen
Answer: it’s d on edunuity. (Hydrogen and oxygen)
Explanation:
What is solubility?
A solution in which no more solute will dissolve
The amount of solute it takes to make a supersaturated solution.
The amount of solute that will dissolve in a given amount of solvent
The amount of solvent it takes to dissolve 100 g of solute
Answer:
C. The amount of solute that will dissolve in a given amount of solvent.
Explanation:
Solubility is the amount of solute that will dissolve in a given amount of solvent. Option 3 is correct.
A solution is a homogeneous mixture of two or more substances, where the substances are uniformly distributed throughout the mixture.
Solubility is defined as the amount of solute that will dissolve in a given amount of solvent at a specific temperature and pressure. It is usually expressed in terms of grams of solute per 100 grams of solvent, or in terms of the concentration of the solute in the solution.Therefore, the amount of solute that will dissolve in a given amount of solvent is referred to as solubility. The correct answer is option 3.
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a metal has a mass of 54g and a volume of 9 cm. what is the density of the meatal
Answer:
6gm/cm³
Explanation:
It's simple,
The formula to Density is as follows,
Mass
Density = --------
Volume
Grams is a measurement of Mass and Cubic center meters is a measurement of Volume. Thats why we will fill in the formula like this,
54
D = -------
9
Then we divide to get,
D = 6
Next we fill in the units which are grams and cubic centimeters. The initials for the 2 are gm and cm³ so we'll combine those into this,
gm/cm³
Next we combine our answers which also brings us to our answer- 6 gm/cm³
Hope I was helpful,
Toodles
What to do when tired and can not sleep?
Answer: listen to relaxing music
A sample of gas occupied 250.0 mL at 30.0 C. What volume will it have at 60.0 C, assuming the pressure remains constant?
Answer: 274.75 mL
Explanation:
Initial volume of gas V1 = 250.0 mL
Initial temperature of gas T1 = 30.0 C
Convert temperature in Celsius to Kelvin
(30.0°C + 273 = 303K)
New volume V2 = ?
New temperature T2 = 60.0 C
(60.0°C + 273 = 333K)
Since, volume and temperature are involved while pressure is constant, apply the formula for Charles law
V1/T1 = V2/T2
250.0 mL/303K = V2/333K
Cross multiply
250.0 mL x 333K = 303K x V2
83250 = 303V2
V2 = 83250/303
V2 = 274.75 mL
Thus, the volume will be 274.75 mL
PLEASE HELP, ON A TIMER!!! WILL MARK BRAINLIEST
Consider the total ionic equation below.
Upper B a superscript 2 plus, plus 2 upper N upper O subscript 3 superscript minus, plus 2 upper N a superscript plus, plus upper C upper O subscript 3 superscript 2 minus right arrow upper Ba upper C Upper O subscript 3 plus 2 upper N a superscript plus, plus 2 upper N upper O subscript 3 superscript minus.
Which is the net ionic equation for the reaction?
Upper B a superscript 2 plus, plus upper C upper O subscript 3 superscript 2 minus right arrow upper B a upper C upper O subscript 3.
2 upper N a superscript plus, plus upper C upper O subscript 3 superscript 2 minus right arrow upper N a subscript 2 upper C upper O subscript 3.
Upper N upper O subscript 3 superscript minus, plus upper N a superscript plus right arrow upper N a upper N upper O subscript 3.
Upper B a superscript 2 plus, plus 2 upper N upper O subscript 3 superscript minus right arrow upper B a (upper N upper O subscript 3) subscript 2.
Answer:
Upper B a superscript 2 plus, plus 2 upper N upper O subscript 3 superscript minus right arrow upper B a (upper N upper O subscript 3) subscript 2.
I think...
Answer: Upper N upper H subscript 4 superscript plus. and Upper S upper O subscript 4 superscript 2 minus.
Explanation: The spectator ions in this reaction are the ammonium ion and the sulfate ions.
In a reaction, not all of the ions are reacting. The ions not reacting are called the spectator ions.
When we eliminate such ions, we get an overall view of the reaction.
The reaction is:
2NH₄⁺ + 2OH⁻ + 2H⁺ + SO₄²⁻ ⇒ 2NH₄⁺ + 2H₂O + SO₄²⁻
In ionic equations, water soluble reactants and products are split into their constituent ions while non-ionizing or gaseous reactants and products are represented as formulae or molecules.
The species that are not reacting and appears on both sides are 2NH₄⁺ and SO₄²⁻ and are the spectator ions.
These non-reactive species are eliminated from the overall ionic equation that shows the reacting ions only.
americium-241 has a half-life of 430 years. how much of a 10.0g sample of americium-241 remains after 1720 years?
Answer:
(a) What are the half-lives of these two isotopes? (b) Which one decays at a faster rate? (c) How much of a 1.00-mg sample of each isotope remains after 3 half- ...
Explanation:
Convert 5 moles H2O to liters
Consider this reaction mechanism: Step 1: Mo(CO)6→ Mo(CO)5 + CO Step 2: Mo(CO)5 + P(CH3)3→ Mo(CO)5P(CH3)3 Which of these is an intermediate
Answer:
Mo(CO)5 is the intermediate in this reaction mechanism.
Explanation:
The reaction mechanism describes the sequence of elementary reactions that must occur to go from reactants to products. Reaction intermediates are formed in one step and then consumed in a later step of the reaction mechanism.
In this reaction mechanism, Mo(CO)5 is the product of 1st reaction and then it is used as a reactant in 2nd reaction. So, Mo(CO)5 is the reaction intermediates.
The overall balanced equation would be,
Mo(CO)6 + P(CH3) ↔ CO + Mo(CO)5 + P(CH3)3
Answer:
In terms of molecularity, Step 1 is
⇒ unimolecular
and Step 2 is
⇒ bimolecular.
Explanation:
EDGE 2023
how many grams of zncl2 will be produced from 32.0 g of zn and 13.0 g of cucl2
Answer: 13.2g of ZnCl2
Explanation:
Calculate the molar mass of NH4NO3.
Answer:
80.043 g/mol
Explanation:
Ammonium nitrate is a chemical compound, the nitrate salt of the ammonium cation. It has the chemical formula NH ₄NO ₃, simplified to N₂H₄O₃. It is a white crystalline solid and is highly soluble in water. It is predominantly used in agriculture as a high-nitrogen fertilizer.
What physical property of materials depends on the ability of electrons to move
easily?
A Solubility in water
B Electrical conductivity
C Low melting point
D Brittleness
The physical property that depends on the ability of electrons to move easily is electrical conductivity, which is characteristic of materials like metals that are good conductors of electricity.
B is correct
Explanation:The physical property of materials that depends on the ability of electrons to move easily is electrical conductivity. Materials with high electrical conductivity, such as metals, allow electrons to flow through them with ease, facilitating the flow of electric current.
Examples include silver and copper, which are widely used in electrical wiring and components due to their excellent conductivity. In contrast, materials with low electrical conductivity or insulators, like rubber or glass, do not allow electrons to move freely, inhibiting the flow of electric current.
When considering the options provided, solubility in water and melting points are not directly related to the movement of electrons, and brittleness is a mechanical property that describes how easily a material can break or shatter.
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Definition: This is an alternative form of a gene.
Answer:
The correct term for the definition is Allele.
At 1.4 atm of pressure a gas has a volume of 111 ML at what pressure will the gas have a volume of 85 ML.
Answer:
The pressure will be 1, 83 atm
Explanation:
We use Boyle Mariotte's formula: for a given mass of gas at constant temperature, the pressure and volume vary inversely proportionally. We convert the unit ml into L: 111/1000= 0,111 L and 85/1000= 0,085 L.
P1xV1=P2xV2
P2= (P1xV1)/V2=(1,4 atm x 0,111L)/0,085L=1,83 atm
Which components of the apparatus affect its motion?
Answer:
An internal force acts between elements of the system. ... Only external forces affect the motion of a system, according to Newton's first ... Newton's second law states that a net force on an object is responsible for its ... Prior to manned space flights, rocket sleds were used to test aircraft, missile equipment, and physiological
Explanation:
Which electromagnet is stronger and why?
NEED HELP!!!
Match the following words with their definitions.
1.
number of protons in an atom
neutron
2.
negatively charged particle circling nucleus
nucleus
3.
matter made up of just one type of atom
element
4.
building block of matter
proton
5.
neutrally charged particle nucleus
atomic number
6.
center of the atom made up of protons and neutrons
electron
7.
positively charged particle in the nucleus
atom
Answer:
1.atomic number
2.electron
3.element
4.atom
5.neutron
6.nucleus
7.proton
Explanation:
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The matching exercise pairs terms like 'atomic number' and 'electron' with their correct definitions. The sum of protons and neutrons in an atom's nucleus is the 'mass number,' and the space where electrons are most likely to be found around the nucleus is known as an 'electron shell.'
number of protons in an atom - atomic numbernegatively charged particle circling nucleus - electronmatter made up of just one type of atom - elementbuilding block of matter - atomneutrally charged particle in nucleus - neutroncenter of the atom made up of protons and neutrons - nucleuspositively charged particle in the nucleus - protonNow, to address the descriptions provided
(a) The sum of the number of protons and neutrons in an atom is known as the mass number.
(b) The defined space around an atom's nucleus, where an electron is most likely to be found, is called an electron shell or energy level.
What property is used to calculate the ph of a solution
A. The hydrogen ion concentration in mol/L
B. The hydrogen ion concentration in ppm
C. The hydrogen ion concentration in mg/dL
D. The hydrogen ion concentration in mol/kg
help if u help ill give you a rhino
Final answer:
The pH of a solution is calculated using the hydrogen ion concentration in mol/L (molarity) by taking the negative logarithm of that concentration.
Explanation:
The property used to calculate the pH of a solution is A. The hydrogen ion concentration in mol/L. To calculate pH, we first measure the concentration of hydrogen (H+) ions in moles per liter (molarity). Then, we take the negative logarithm of this concentration to find the pH value. For instance, a concentration of 0.01 M H+ ions results in a pH of 2 because the negative log of 0.01 is 2. The pH scale typically ranges from 0 to 14, with 7 being neutral. A pH less than 7 indicates an acidic solution, while a pH greater than 7 indicates a basic solution.
PLEASE HELP ME ! A group of students performed an experiment in which they dropped a cube of metal into a graduated cylinder of water. The initial temperature of the water was 25 'C. The mass of the water was 50 g
After energy in the form of heat was transferred to the water, its temperature was 35 C. Based on the evidence, how much energy was transferred between the metal and the water?
0.2 cal
10 cal
so call
• 500 cal
The amount of energy transferred between the metal and the water is 500 cal.
Explanation:The amount of energy transferred between the metal and the water can be calculated using the formula:
Energy = Mass of water × Specific heat of water × Change in temperature
Given that the initial temperature of the water was 25 °C and the final temperature was 35 °C, and the mass of the water was 50 g, we can substitute these values into the formula:
Energy = 50 g × 1 cal/g °C × (35 °C - 25 °C)
= 500 cal
Therefore, 500 cal of energy was transferred between the metal and the water.
PLEASE HELP!!!!
A foundry worker places a 5.78 kg sheet of cobalt at a temperature of 11°C on top of a 16.6 kg sheet of lead at 63°C. Assuming no heat is lost to the surroundings, calculate the final temperature of the two sheets of metal.
Answer:
35ºC
Explanation:
You need the specif heat capacities of both cobalt and lead.
Specific heat of cobalt: 0.42 J/g.ºCSpecific heat of lead: 0.13 J/g.ºCWhen the two sheets reach the thermal equilibrium their temperatures are equal.
You can use the equations for the thermal heat to find the equilibrium temperature:
Thermal heat released by the hot sheet, lead:
Q = m × C × ΔTQ = 16.6 kg × 0.13J/g.ºC × (63ºC - T)Thermal heat absorbed by the cold sheet, cobalt:
Q = m × C × ΔTQ = 5.78 kg × 0.42J/g.ºC × (T - 11ºC)Equal the two equations to solve for T:
16.6 kg × 0.13J/g.ºC × (63ºC - T) = 5.78kg × 0.42J/g.ºC × (T - 11ºC)I remove the units for easier handling:
135.954 - 2.158T = 2.4276T - 26.70364.5856T = 162.6576T = 35.47ºCRound to 2 significant figures: 35ºC ← answer
PLEASE ANSWER !!!
2H2 + O2 —> 2H20 + energy
What type of reaction is represented by this equation ?
- decomposition
-double replacement
-Single replacement
-synthesis
Answer: synthesis reaction.
Explanation:
The type of reaction represented by the equation is synthesis reaction.
Definition of synthesis reactionA synthesis reaction is simply defined as reaction in which two or more substances react to produce a single new substance which has characteristics different from the reactants.
Considering the equation given, we can conclude as follow:
2H₂ + O₂ —> 2H₂0 + energy
The reaction is a synthesis reaction since H₂ and O₂ combined to produce a single product i.e H₂O
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Which reasons explain why acids are added to foods? Check all that apply.
Food acids are added to make flavors "sharper", and also act as preservatives and antioxidants.
Acids are added to foods in order to preserving food as well as a food additives.
Why acids are added to foods?Acids are added for preserving food products as well as preventing bacteria growth and maintain quality of a product. there are a number of fruits and vegetables that have different types of acid.
So we can conclude that acids are added to foods in order to preserving food as well as a food additives.
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Elizabeth were studying the history of cell theory and the contributions of different scientist she made this table to compare two of the scientist which part of scientists and Elizabeth right instead of X and Y
Answer:c. Hooke and Leeuwenhoek
Explanation: I ask and that answer was right I don't know the explanation
Answer:
C. hooke and leruwenhoek
what is a cause of cemical weathering?
A. sunlight
B. wind
C. gravity
D. acids
Answer:
D. acids
Explanation:
I hope this helped
CaCl2 + Na2CO3 → CaCO3 + 2 NaCl
1. How many moles of calcium carbonate (CaCO3) are produced when
8.45 moles of calcium chloride react (CaCl2)? *
Answer:
8.45 moles are produced
Explanation:
CaCl₂ + Na₂CO₃ → CaCO₃ + 2 NaCl
From the equation, we can see that for every 1 mole of CaCl₂ and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl
to calculate how many moles of CaCO₃ ,we simply multiply multiply each by the 8.45 moles of CaCl₂ which will reacts
these is because for every 1 mole of CaCl₂ and 1 mole Na₂CO₃ will give 1 mole of CaCO₃ and 2 moles of NaCl
therefore we have every 1x8.45(8.45) mole of CaCl₂ and 1x8.45(8.45) mole Na₂CO₃ will give 1x8.45(8.45) mole of CaCO₃ and 2x8.45(16.9) moles of NaCl
8.45 moles are produced in the reaction
Answer:
8.45 moles
Explanation:
The balanced equation for the reaction is given below:
CaCl2 + Na2CO3 → CaCO3 + 2NaCl
From the balanced equation above,
1 mole of calcium chloride (CaCl2) produced 1 mole of calcium carbonate (CaCO3).
Therefore, 8.45 moles of calcium chloride (CaCl2) will also produce 8.45 moles of calcium carbonate (CaCO3)
From the illustration above, 8.45 moles of calcium carbonate (CaCO3) are produced.