Answers
Related Questions
Why are humans more susceptible to concussions than bighorn sheep and woodpeckers?
Answers
Answer:
there is a gap in the human brain and the skull filled with fluid. woodpecker and bighorn sheep do not have this, so the brain doesn't recoil and hit the skull.
Someone can help me please??
Answers
Explanation:
tbh I really don't know but
2Ca (PO.)2 + 6SiO2 + 10C - 6Casio, + PA+10CO
Starting with 700.0 grams of calcium phosphate and assuming excess silicon dioxide and carbon,
how many moles of phosphorus will be produced?
Answers
Taking into account the reaction stoichiometry, 0.1129 moles of P₄ is required to react with with 700.0 grams of calcium phosphate.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Ca₃(PO₄)₂ + 6 SiO₂ + 10 C → 6 CaSiO₃ + 10 CO + P₄
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Ca₃(PO₄)₂: 2 moles SiO₂: 6 moles C: 10 moles CaSiO₃: 6 moles CO: 10 molesP₄: 1 moleThe molar mass of the compounds is:
Ca₃(PO₄)₂: 310 g/moleSiO₂: 60 g/mole C: 12 g/moleCaSiO₃: 116 g/moleCO: 28 g/moleP₄: 124 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Ca₃(PO₄)₂: 2 moles ×310 g/mole= 620 gramsSiO₂: 6 moles ×60 g/mole= 360 grams C: 10 moles ×12 g/mole= 120 gramsCaSiO₃: 6 moles ×116 g/mole= 696 gramsCO: 10 moles ×28 g/mole= 280 gramsP₄: 1 mole ×124 g/mole= 124 gramsMoles of phosphorus P₄ producedThe following rule of three can be applied: If by reaction stoichiometry 620 grams of Ca₃(PO₄)₂ produces 1 mole of P₄, 70 grams of Ca₃(PO₄)₂ produces how many moles of P₄?
[tex]moles of P_{4} =\frac{70 grams of Ca_{3}(PO_{4} )_{2}x1 mole of P_{4} }{620 grams of Ca_{3}(PO_{4} )_{2}}[/tex]
moles of P₄= 0.1129 moles
Finally, 0.1129 moles of P₄ is required to react with with 700.0 grams of calcium phosphate.
Learn more about the reaction stoichiometry:
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how many grams of CaO (mm=56 grams) would be produced from 25.2 grams of CaCo3 (MM=100 grams)
Answers
Explanation:
CaCO3 = CaO + CO2
1mol. 1 mol
100. 56
1 ×100. 1 × 56
100. 56
100g of CaCO3 produces 56g of CaO
25.2g of CaCO3 produces x
x = 25.2 ×56
100
x =14.112g of CaO
URGENT! list 16 things in your house or yard that contain oxygen
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Answer: 16 different air molecules
Explanation: jhit smart
The following molecular equation represents the reaction that occurs when aqueous solutions of silver(I) nitrate and barium chloride are combined.
[tex]2AgNO3(aq) + BaCl2(aq) ⮕2AgCl(s) + Ba(NO3)2(aq)[/tex]
Write the balanced net ionic equation for the reaction.
(Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)
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Answer:
Hey, I hope this helps. You gave the equation already balanced so there was no need to do so, the next thing we need to do after balancing is to split the strong electrolytes into ions. Once that is completed we cross off any reoccurring ions. That leaves us with our complete net ionic.
I also recommend you check out Wayne Breslyn on Yt. He is so helpful with equations like these.
1. (2) Which quantum state can not exist?
A
(1, 0, 0, 1/2)
B
(2, 0, 0, -1/2)
c
(2, 1, 0, 1/2)
D
(2,0, 1, -1/2)
Answers
Answer:
D
Explanation:
Reason being that if the principal quantum number is 2, the azimuthal quantum number can either be 0 or 1, and in this case it's 0. Since the azimuthal is 0 the magnetic quantum number must definitely be 0, not 1.
Why is nitrate important in the ocean? How is it used biologically in the ocean?
Answers
(b)
The test-tube transfers thermal energy from the water to the stearic acid.
By what method is most of the thermal energy transferred?
Tick the correct box.
conduction
evaporation
convection
radiation
Answers
Since we are missing the diagram to work with, we will answer this assuming that the test tube was placed inside a beaker of stearic acid, in which case the transfer of thermal energy is by way of radiation.
How is thermal energy transferred through radiation?Thermal radiation is the most common method of transferring thermal energy. We see this every day, for example when a cup of coffee becomes colder over time, this is due to the coffee radiating its heat into the surrounding air. The heat will travel in waves through air or water, which is what happens to the test tube and the beaker.
Therefore we can confirm that in the case described and with the assumption made regarding the placement of the test tube, the transfer of thermal energy will be by way of radiation.
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An object is accelerated from rest to a speed of 50m/s in 10 seconds. The acceleration of the object is?
Answers
Answer:
dasdw
Explanation:
TRUE or FALSE
Nonpolar molecules only have nonpolar bonds.
Answers
Answer:
its false
Explanation:
srry if its wrong ;-;
A calorimetry experiment determined that the combustion of 1.01 g of H2(g) reacting with excess O2(g) gave qsoln = 143 kJ. Calculate ΔH for the reaction: H2(g) + ½ O2(g) → H2O (l)
Answers
Answer:
089
Explanation:
I have no idea
Based on the data from the calorimetry experiment, the enthalpy change, ΔH of the reaction is -286 KJ .
What is enthalpy change, ΔH of a reaction?The enthalpy change, ΔH of a reaction is the amount of heat evolved or absorbed when reactant molecules react to form products.
From the calorimetry experiment, the determined heat of combustion of 1.01 g of H2(g) reacting with excess O2(g), qsoln = 143 kJ.
Heat is evolved in the reaction, therefore the qsoln = -143 kJ
Equation of reaction is given as:
H2(g) + ½ O2(g) → H2O (l)
Molar mass of H = 1.01 g
Mass of H2 = 1.01 g × 2 = 2.02 g
ΔH of the reaction = -143 kJ × 2.02/1.01
ΔH of the reaction = -286 KJ
Therefore, the enthalpy change, ΔH of the reaction is -286 KJ .
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What’s the molecule equation?
Answers
Answer:
A molecular equation is an equation in which the formulas of the compounds are written as though all substances exist as molecules. However, there is a better way to show what is happening in this reaction.
Explanation:
#Carry on learning
So what is the easiest thing for each group to do in order to be "happy"?
Group 1:
Group 2
Group 13:
Group 14:
Group 15:
Group 16:
Group 17:
Group 18:
Answers
Answer:
cooperate and share ideas between each other and put people with people they know well or work well with.
Explanation:
How is the energy for this process stored?
a) A generator converts solar energy into electricity. Electricity is used to power a
watering system.
b) Electricity powers a watering system. Water flows from the reservoir to the sea
turning a generator which makes electricity.
c) Electricity is used to pump the water from the sea to the reservoir. Water flowing back
down drives a generator which makes electricity.
d) A generator converts solar energy into electricity used to pump water from the sea to
the reservoir.
Answers
Answer:
d)A generator converts solar energy into electricity usee to pump water from the sea to the resevoir
A generator converts solar energy into electricity used to pump water from the sea to the reservoir. So, option D is correct.
What is solar energy ?Solar energy works by transforming solar energy into power. Electricity and heat are the two energy types that the sun produces for human use.
Both are produced using solar panels, which may be found on everything from home rooftops to vast "solar farms" covering acres of rural land.
Solar energy is electrical energy produced directly from sunshine. Solar energy can be utilized to generate electricity or thermal energy. Sustainable Energy We don't use any of the Earth's resources, like coal or oil, when we use solar electricity.
Solar energy is a key energy source in the transition to the creation of clean energy since the sun produces more energy than humans could ever require.
Thus, option D is correct.
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#SPJ2
How to find average mass
Answers
How many atoms are in 72 grams of Calcium (Ca) ?
Answers
Answer:
There are a total of 1.13×1024atoms in 75 grams of calcium atoms.
Explanation:
A reaction of the form
aA - Products
gives a plot of 1/[A] vs time (in seconds) which is a straight line with a slope of 4.15 x 103. Assuming [A]o = 0.100 M, calculate the time in seconds) required
for the reaction to reach 38.3 percent completion.
Answers
The time taken for the second order reaction is 1494 seconds.
What is a second order reaction?A second order reaction is one in which a plot of the inverse of the concentration of a reactant versus time is a straight line and gives the slope of k which is the rate constant.
The formula for a second order reaction is;
1/[A] = kt + 1/[A]o
[A]o = 0.100 M
[A] = 0.100 M - (0.383 × 0.100 M) = 0.0617 M
k = 4.15 x 10^-3
t = ?
t = (0.0617 M)^-1 - ( 0.100 M)^-1/4.15 x 10^-3
t = 16.2 - 10/4.15 x 10^-3
t = 1494 seconds
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Which requires a chemical reaction to form?
O A. a mixture
B. a compound
O c. a solution
O D. a metal
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Which layer of Earth is responsible for the movement of tectonic plates?
Answers
A famous Italian chef wants to open a restaurant in
one of the cities (Mumbai, Denver, Mexico City).
The optimum temperature for cooking pasta is
212°F (100°C). Which city would be the best place
to open the restaurant?
a. Mumbai
b. Denver
c. Mexico City
Answers
Mumbai is the best as it has the largest population and the closest temp to that of cooking pasta
Opening a restaurantMumbai an city in India with an average temperature of 33C and a population of about 21,296,516
Denver a city in Colorado in the USA with a temperature of 5C and a population of 705,576 (2019)
Mexico City a city in Mexico with a temperature of 12C and a population of 9 Million persons
Therefore, Mumbai is the best as it has the largest population and the closest temperature to that of cooking pasta
More on Cities
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30) The number of calories needed to raise the temperature of 32 g of water from 12°C to 54 °C is A) 380 cal B) 1.3 cal C) 1300 cal D) 1700 cal E) 0.76 cal
Answers
Explanation:
Joules = mass x specific heat x temperature change
32 x 4.184 x (54 - 12)
= 133.888 x 42
= 5,623.296
(significant figures => 5,600)
1-10 what is your rating
Answers
Draw the dot structure of CX4
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Refer to the attachment
For each of these equations, predict the effects of temperature on the spontaneity of the reaction.
2N2O(g) → 2N2(g) + O2(9)
AH<0; AS > 0
A
H
A
S
AG
Spontaneity
+
+
H20(1) ► H2O(9)
AH> 0; AS >
-
+
302(9) ► 203(9)
AH >0; AS < 0
+
+ or -
nonspontaneous for
all T
spontaneous for all T
spontaneous at high
т
nonspontaneous at
low T
spontaneous at low T
nonspontaneous at
high T
C(s) + 2Cl2(g) → CCl4(9)
AH<0; AS < 0
+ or -
DONE
Answers
The spontaneity of a reaction depends on the temperature, enthalpy and entropy.
What is spontaneity of a reaction?A reaction is said to be spontaneous if it can proceed on its own without a further input of energy.
In the first case, when the enthalpy is less than zero and the entropy is greater than zero, the reaction is spontaneous at all temperatures.
In the second case, when the enthalpy greater than zero and the entropy is greater than zero, the reaction needs to proceed at high temperatures to be spontaneous.
In the third case, when the enthalpy is greater than zero and the entropy is less than zero, the reaction ought to proceed at low temperature in order to be spontaneous.
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Answer:
1.Spontaneous at all temperatures
2. Spontaneous only at high temperatures
3. Non spontaneous at all temperatures
4. Spontaneous only at low temperatures
Explanation:
Just did it on edge
You see a boat sitting at the end of a dock. Ten minutes later you see the same boat in a cove to the right of the dock You did not see the boat move.
However, you know that the boat moved because its
relative to the dock changed.
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No action is required. The sailboat should change course and speed.
What would a possible length for the missing
side length?
16
8
Answers
Answer:
24
Explanation:
the total of any 2 sides must be larger than the 3rd side. x is the 3rd side.
8 + x > 16
x > 8
16 + x > 8
x > -8
8 + 16 > x
24>x
x < 24
the second inequality tells us nothing as sides must be positive.
the third side must be between 8 and 24
I NEED TOUR HELP, PLEASE.
G. A gas is at currently at STP. What volume will the
gas have at 100°C and 5.0 atm?
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Which statement is true about the temperature and density of air?
Answers
Answer: Normally I would need more info but I believe the answer is -Higher temperature air is less dense.
Explanation:
Took The Same Quiz!
Fill in the reaction type and predicted products for:
CuSO4 (aq) + Al (s) → ??
Type in the IUPAC name or formula for each product.
Write subscripts as normal numbers.
If there is no second product, type "nothing".
The reaction type is
Question Blank 1 of 3
.
The correct products are:
Question Blank 2 of 3
and
Question Blank 3 of 3
Answers
Reaction 1 : Add Zinc to Copper Sulfate.
Observations of Reactants : Zinc is in solid state and copper sulfate in aqueous state.
Predicted Type(s) of Reaction : Single-displacement reaction
Observations of Products : Copper is in solid state and zinc sulfate in aqueous state.
The balanced chemical reaction :
Types of reaction : Single-displacement reaction : It is a type of reaction in which a single element displaces another element in a compound.
Reaction 2 : Mix Potassium Iodide and Lead (II) Nitrate.
Observations of Reactants : Potassium iodide is in solid state and lead nitrate in aqueous state.
Predicted Type(s) of Reaction : Double-displacement reaction
Observations of Products : Lead iodide is in solid state and potassium nitrate in aqueous state.
The balanced chemical reaction :
Types of reaction : Double-displacement reaction : It is a type of reaction in which two reactants exchange their ions to form two new compounds.
Reaction 3 : Burn Copper Wire.
Observations of Reactants : Copper is in solid state and oxygen in gas state.
Predicted Type(s) of Reaction : Oxidation reaction
Observations of Products : Copper oxide is in solid state.
The balanced chemical reaction :
Types of reaction : Oxidation reaction : In a oxidation reaction, a substance gains oxygen.
Reaction 4 : Heat Sodium Carbonate.
Observations of Reactants : Sodium carbonate is in solid state.
Predicted Type(s) of Reaction : Thermal decomposition reaction
Observations of Products : Sodium oxide is in solid state and carbon dioxide in gas state.
The balanced chemical reaction :
Types of reaction : Thermal decomposition reaction : It is defined as the breaking down of a chemical compound due to heating.