Answer: 8
Explanation:
Electron Identify the type of charge of the following particles in an
atom
Electron
Neutron
Proton
Answer:
Electron charge: -1
Neutron charge: 0
Proton charge: +1
Which element would react most like calcium (Ca)?
A. O
B. Ti
C. C
D. Mg
Answer:
B/Ti
Explanation:
Answer:mg D
Explanation:A P E X
Phosphine (PH3) can be prepared by the reaction of calcium phosphide , Ca3P2: based on this equation : Ca3P2 + 6H2O —-> 3 Ca(OH)2 + 2 PH3
Based on this equation , which of the following statements are correct?
(a) one mole of Ca3P2 produces 2 mol of PH3
(b) one gram of Ca3P2 produces 2g of PH3
(c) Three moles of Ca(OH)2 are produced for each 2 mol of PH3 produced
(d) the mole ratio between phosphine and calcium phosphide is 2 mol PH3 over 1 mol Ca3P2
Taking into account the reaction stoichiometry, you can observe that:
one mole of Ca₃P₂ produces 2 mol of PH₃.the mole ratio between phosphine and calcium phosphide is 2 mol PH₃ over 1 mol Ca₃P₂.Reaction stoichiometryIn first place, the balanced reaction is:
Ca₃P₂ + 6 H₂O → 3 Ca(OH)₂ + 2 PH₃
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:
Ca₃P₂:1 mole H₂O: 6 molesCa(OH)₂: 3 molesPH₃: 2 molesThe molar mass of the compounds is:
Ca₃P₂: 182 g/mole H₂O: 18 g/moleCa(OH)₂: 74 g/molePH₃: 34 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Ca₃P₂: 1 mole ×182 g/mole= 182 grams H₂O: 6 moles× 18 g/mole= 108 gramsCa(OH)₂: 3 moles ×74 g/mole= 222 gramsPH₃: 2 moles ×34 g/mole= 68 gramsCorrect statementsThen, by reaction stoichiometry, you can observe that:
one mole of Ca₃P₂ produces 2 mol of PH₃.the mole ratio between phosphine and calcium phosphide is 2 mol PH₃ over 1 mol Ca₃P₂.Learn more about the reaction stoichiometry:
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The molar mass of the hydrated sodium sulfate is 322.1 g/mole. What is the formula of the hydrate salt?
Answer:
Na₂SO₄·10H₂O.
Explanation:
Hello.
In this case, since the anhydrous sodium sulfate is:
[tex]Na_2SO_4[/tex]
Whose molar mass is:
[tex]M=23+32+16*4=142 g/mol[/tex]
But the total hydrate's molar mass is 322.1 g/mol, we can compute the mass of water:
[tex]m_{water}=322.1-142=180.1g/mol[/tex]
Thus, the molecules of water are found by diving the total mass of water by the mass of one mole of water:
[tex]#water=\frac{180.1}{18}=10[/tex]
It means, that the formula is Na₂SO₄·10H₂O.
Best regards.
A sample of 0.500 moles of nitrogen occupies 1.000 L. Under the same conditions, what number of moles occupies 1.200 L
Answer:
I think
0.6 moles of nitrogen
Enter an equation for the formation of Al2O3(s) from its
elements in their standard states.
Express your answer as a chemical equation including
phases.
The compound, solid Al2O3, is formed from solid aluminum and oxygen gas under certain conditions.
Formation of Al2O3Solid aluminium oxide, Al2O3, is formed from its components elements as follows:
2Al (s) + 3O2 (g) ----------> 2Al2O3 (s)
The state of the aluminum element is solid, that of oxygen is gas, and that of the product, Al2O3, is solid.
More on Al2O3 can be found here: https://brainly.com/question/25873251
What can be used to determine the absolute age of two rocks? *
Answer:Ithink erosion cuz if we can tell how long ago it eroded we can see how old it is
Explanation:
A perfume bottle is dropped in the corner of a room. The odor of the perfume can be detected on the other side of the room. Which statement best describes this observation?
Particles are moving from regions of high concentration to low concentration.
Particles are moving from regions of low concentration to high concentration.
Particles are moving through a small opening into a smaller volume.
Particles are moving through a small opening into a larger volume.
Answer: Particles are moving from regions of high concentration to low concentration.
Explanation:
Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. The particles of smelly gas are free to move quickly in all directions. They eventually spread through the whole room from an area of high concentration to an area of low concentration. This continues until the concentration of the particles of smelly gas is the same throughout the room. Remember that the particles still move, even when the smell is evenly spread.
Answer:
Answer: Particles are moving from regions of high concentration to low concentration.
Explanation:
right on edge 2021
1. How many moles are in 3.01 x 1023 atoms of calcium?
Answer:
.5 moles of calcium
Explanation:
We want to find the number of moles in 3.01 x 10^23 atoms of calcium
To convert atoms to moles, we simply divide the given number of atoms by Avogadro's number , 6.022 x 10^23
Given number of atoms : 3.01 x 10^23
Number of moles : 3.01 x 10^23 / 6.022 x 10^23 = .5 moles of calcium ( rounded )
Assuming a 4.00 litre of a sample gas at 1.00 atm compressed to 0.800 litre at constant temperature. Calculate the final presure of the gas.
At constant temperature, the final pressure of the compressed gas is 5.0atm.
Given the data in the question;
Initial volume of the gas; [tex]V_1 = 4L[/tex]Initial Pressure; [tex]P_1 = 1.0atm[/tex]Final volume; [tex]V_2 = 0.800L[/tex]Final pressure; [tex]P_2 = \ ?[/tex]
Boyle's lawBoyle's law states that the volume V of a given quantity of gas is inversely proportional to its pressure P at constant temperature.
It is expressed as;
[tex]P_1V_1 = P_2V_2[/tex]
Where [tex]P_1[/tex] is Initial Pressure, [tex]V_1[/tex] Initial volume, [tex]P_2[/tex] is Final Pressure and [tex]V_2[/tex] is Final volume.
To determine the final pressure of the gas, we substitute our given values into the expression above.
[tex]P_1V_1 = P_2V_2\\\\P_2 = \frac{P_1V_1}{V_2} \\\\P_2 = \frac{1.0atm \ *\ 4L}{0.800L}\\ \\P_2 = \frac{1.0atm \ *\ 4}{0.800}\\\\P_2 = \frac{4.0atm}{0.800}\\\\P_2 = 5.0atm[/tex]
Therefore, at constant temperature, the final pressure of the compressed gas is 5.0atm
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Which unequal condition causes a sea breeze to develop
A:warmer air over land than water
B:warmer air over water than land
Please help me
Answer:
Drier air over land than water
OR
A:warmer air over land than water
Use Dot and cross method to show the bonding of the atoms and state the number of atoms of each element present
a. Magnesium and Fluorine
b. Sodium and Fluorine
c. Sodium and Oxygen
d. Aluminum and Iodine
Answer:
Check the attached one..I only draw the Dot method of Magnesium and Fluorine.. since i love chemistry ..Hope this helps you...Balance you have to do it yourself..If you didn't get the answer let me know in the comments..But you have try okay..
Hello this question only for JungKookLuver and jguzman577! What my name?
Answer: ThankYou So much your name is Jacob!
Explanation: Hello
Answer: Thanks for the Free Points Brother!
Explanation: Yay! :D
Plant A gets no fertilizer, plnt B-5mg/day, and plnt C-10mg/day. Which is the control group?
Answer:
Plant A
Explanation:
This is because Plant A is what you will compare to the other plants. Because it has no fertilizer is is the independent variable.
a sample of sodium reacts completely with 0.142 kg chlorine, forming 234 g of sodium chloride. What mass of sodium reacted
The mass and volume of a body are 4.
4.237kg and
2.5cm 3
respectively. What is the density
Explanation:
p=mv
=(4.237)(2.5x10^-2)^3
=6.6x10^-5 kgm-3
The pretend element, knoxium, Kx, has the following composition:
164Kx, 164.08 amu (60.44%)
165Kx, 165.11 amu (13.55%)
169Kx, 168.92 amu (??????%)
What is the average atomic mass of the "knoxium"?
164.08amu
165.48amu
166.04 amu
Answer:
165.48 amu
Explanation:
First, you need to find the last percentage.
100% = 60.44% + 13.55% + x
100% = 73.99% + x
x = 26.01%
Now, multiply each mass by the respective percentage.
164.08 × 0.6044 = 99.17
165.11 × 0.1355 = 22.37
168.92 × 0.2601 = 43.94
Lastly, add the products together to find the average atomic mass.
99.17 + 22.37 + 43.94 = 165.48
The average atomic mass of "knoxium" is 165.48 amu
after vacuum filtration 9.84 grams of potassium alum product was obtained. This means that the actual yield of potassium alum is 6.98 grams. Calculate the percent yield of this process using your theoretical yield from #7
Answer:
70.9% or 71% yield
Explanation:
actual yield/theoretical yield * 100% = % yield
6.98/9.84 * 100 = 70.9
how do water molecules disslove in salt
Because the positive part of water molecules attracts negative chloride ions and the negative part of water molecules attracts positive sodium ions, water may dissolve salt. The solubility of a material is the quantity of that substance that can dissolve in a liquid (at a given temperature).
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Type the correct answer in the box. Spell all words correctly.
The boxer crab carries sea anemone in its claws and uses its stinging tentacles against predators. In turn, the anemone consumes the crab's
leftovers. What form of ecological relationship is this?
The relationship between the boxer crab and anemone is a form of
blank
Answer:
The relationship between the boxer crab and the anemone is a form of symbiosis, called mutualism.
Explanation:
The boxer crab —Lybia tesselata— receives its name because it carries anemones in its anterior claws, in the form of boxing gloves, constituting a symbiotic association of a mutual type.
Mutualism is an interspecific relationship where two individuals of different species benefit from each other.
The anemone —usually of the genus Triactis or Bunodeopsis— has tentacles capable of secreting a stinging substance that contributes to the defense of the crab against its natural predators. On the other hand, the crab helps the anemone to transport and feeds on the food remains left by the crab.
A class does a science experiment. They rub a balloon with a piece of wool. They put the balloon close to a penny and pleces of tissue paper.
They find that the tissue paper moved toward the balloon and the penny did not
What caused the tissue paper to move towards the balloon?
Answer:
D. Electrical charge
Explanation:
What actually caused the tissue paper to move towards the balloon is "electrical charge".
When they rubbed the balloon with a piece of wool, the wool looses electrons which gives it a positive charge while the balloon gains electrons which gives it a negative charge.
The pieces of tissue paper is able to move toward (i.e attracted) the balloon because the negatively charged balloon is attracted to the positively charged tissue paper which was neutral.
Answer:
D
Explanation:
How are infrared visible light and ultraviolet Ray's related.
Answer:
Infrared radiation has longer waves than red light, and thus oscillates at a lower frequency and carries less energy. Ultraviolet radiation has shorter waves than blue or violet light, and thus oscillates more rapidly and carries more energy per photon than visible light does.
Explanation:
Methane and Sulfur react to produce carbon disulfide and hydrogen sulfide. what is the balanced equation?
Answer:
CH₄ +2S₂ → CS₂ +2H₂S
Explanation:
How many grams does 1.0 liter of motor oil weigh if the density of motor oil is 0.80 g/mL?
Answer:
800 grams
Explanation:
Density = mass/volume => mass = Density x Volume
Density = 0.80 g/ml
Volume = 1.0 Liter = 1000 ml
mass of 1.0 liter = 0.80 g/ml X 1000 ml = 800 grams
who often does galeras erupt
Answer:
Galeras has erupted more than 20 times since the 1500s. Volcanic activity has been frequent in the last five years, including an eruption in January 1993 that killed nine people on a scientific expedition to the volcano summit. Chuck Wood of VolcanoWorld was on Galeras at that time but was not injured
Explanation:
Galeras has erupted more than 20 times since 1500s. Volcano activity has been frequent in the last 5 years,including an eruption in January 1993 that killed nine people on a scientific expedition to the volcano summit.
Adam likes to make sure he eats healthy diet including fruits and vegetables. His body system works to make sure this food is broken down into small enough pieces and is then delivered to the areas in his body that need it the most . Which body system will work together to make sure nutrients get to every cell in his body
Answer:
Explanation:
Your circulatory system carries oxygen, water, and nutrients to cells throughout your body. Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin. Your nervous system controls all these activities with electrical impulses.
what would lead to a higher final temperature of water, a metal with a low heat capacity of a high heat capacity
A hot metal with a low heat capacity will raise the final temperature of water more than a hot metal with high heat capacity.
Heat capacityIt is the amount of heat required to change the temperature of a substance by just a unit.
Substances that heat up quickly are said to have low heat capacities while those that take time to heat up are said to have high heat capacities.
Substances with low heat capacity also release their thermal energy quicker than those with high heat capacity.
Thus, a hot metal with low heat capacity will readily transfer its thermal energy to water than a hot metal with high heat capacity.
More on heat capacities can be found here: https://brainly.com/question/11194034
What ions are produced from acids and from bases?
A patient cholesterol level and blood measures 149 mg/dL. What is the patients cholesterol level in grams per liter?
Answer:
fasting blood work
Explanation:
edge 2022
Determine the molarity of the bromide ions in solution formed by dissolving 53.79 g of MgBrz in 393.6 ml water?
Answer:
Explanation:
Given data:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution