When electrons flow steadily in one direction, the current is:
Static
Alternating
Direct
How many moles are in 100g of k3PO4
A . 47 mol K3PO4
B. 2.12 mol K3PO4
C. 0.47 mol K3PO4
D. 100 mol K3PO4
Answer:
A
Explanation:
Which substance is an ionic solid? A. LiCl B. HCl C. Ne D. Fe
Answer:
A. LiCl
Explanation:
Lithium chloride is an ionic compound but it also has some covalent character due to the very small size of lithium metal.
Ionic solids are formed between a metal and a nonmetal. Among the given options, option A, LiCl is an example of ionic solid formed from lithium metal and chlorine.
What is ionic solid?Ionic compounds are formed between metals and non-metals. Metals are electron rich and easily loss electrons. Non metals are mostly electron deficient and gain electron from metals.
Lithium is an alkali metal with one valance electron. Cl is 17th element with 7 valence electrons. Cl needs one more electron to achieve octet. Li donates its valence electron to Cl, and gains a positive charge and Cl gains a negative charge by accepting the electron.
The opposite charges between the atoms gets attracted electrostatically forming ionic bond between them and the compound LiCl results. HCl is a covalent compound. Ne and Fe are pure metals and not ionic solids. Hence, option A ic correct.
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How many particles in 352 moles of KLICO3?
O 106 particles
O 2.12 x 1026 particles
O 6.38 x 1025 particles
Answer:
there are 106 particles
The gas in a balloon occupies 1.25 L at 298 K. At what temperature in Celsius (C) will the balloon expand to 6.50 L? (Remember to keep the correct place value in your final answer- thousands place)
Answer:
1549.6K
Explanation:
Using Charles law equation;
V1/T1 = V2/T2
Where;
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information supplied in this question:
V1 = 1.25 L
V2 = 6.50 L
T1 = 298K
T2 = ?
Using V1/T1 = V2/T2
1.25/298 = 6.5/T2
0.004195 = 6.5/T2
T2 = 6.5 ÷ 0.004195
T2 = 1549.6K
"The pH of an acid has nothing to do with the strength of the acid."
Explain why this statement is true. Include the following terms in your explanation
• dissociation
molarity
• strong
• weak
• neutral
• acidic
basic
Answer:The relationship between acid strength and the pH of a solution. ... Typical concentrations of these ions in solution can be very small, and they also ... Acidic solutions have pH values less than 7, and basic solutions have pH values ... p, O, H, end text, it is a little more common to use pH \text{pH} pHstart text, p, H, end text.
Explanation:Therefore a strong acid will contribute more H+ ions than a weak acid. Therefore, the pH of a strong acid solution will be higher than a weak acid solution.
Please help with this (number 10 btw)
Answer:
The answer for the question is True I think
How many moles are in 7.12 x 1021 atoms of iron?
Answer:
0.0118mol
Explanation:
To obtain the number of moles (n) in the given number of molecules of iron, we divide by Avagadro's number (6.02 × 10²³).
That is; n = number of molecules ÷ nA
According to this question, there are 7.12 x 1021 atoms of Iron (Fe).
n = 7.12 x 10²¹ ÷ 6.02 × 10²³
n = 7.12/6.02 × 10^ (21 - 23)
n = 1.183 × 10^-2
n = 0.0118mol
How are chemical and mechanical weathering the same?
Answer:
They break down materials into smaller pieces
Explanation:
Although using different methods
Please help me, quick
No links !
"One possibility is that the battle between the virus and your immune system can take as long as two weeks.
It could be the immune system holds the virus at bay,” said Tompkins.
Or, your immune system has to work so hard that after two weeks it’s inflamed and that’s what makes you feel bad.
A solution has a [OH−] of 1 × 10−12 M. What is the [H3O+] of the solution?
1 × 10−14 M
1 × 10−2 M
2 M
14 M
Answer: The awnser is B
Explanation:
what name is given to group II elements in the periodic table
Answer:
alkaline earth metals
hope this helps
have a good day :)
Explanation:
Answer:
Alkaline earth metals
Explanation:
what does anhydrous mean in your own words?
Answer: no water
Explanation:
Answer:
a substance that is a crystalline compound, contains no water
Neutral atom has 17 electrons. How many neutrons are there in this atom?
Answer:
17
Explanation:
in a neutral atom the number of proton is equal to the number of neutron which is also equal to the number electron in a neutral element so according to the question the mass number is 34 it's proton and atomic number is still 17 and the electron is still 17
When the heat wave passes and temperatures
become mild, electrical demand decreases. What
needs to be done to reduce electricity output in
response to this decreased demand?
the answer: lowering the control rods
Answer:
lowering the control rods
Explanation:
A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L , what is the new pressure?
Answer:
[tex]\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}[/tex]
Explanation:
In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:
[tex]P_1V_1=P_2V_2[/tex]
Now we can substitute any known values into the formula.
Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.
[tex]25.0 \ L * 2.05 \ atm = P_2V_2[/tex]
The volume is decreased to 14.5 liters, but the pressure is unknown.
[tex]25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L[/tex]
Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .
[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}[/tex]
[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}= P_2[/tex]
The units of liters cancel.
[tex]\frac {25.0 * 2.05 \ atm }{14.5 }=P_2[/tex]
[tex]\frac {50.25\ atm }{14.5 }=P_2[/tex]
[tex]3.53448276 \ atm = P_2[/tex]
The original values of volume and pressure have 3 significant figures, so our answer must have the same.
For the number we found, that is the hundredth place.
3.53448276The 4 in the thousandth place (in bold above) tells us to leave the 3 in the hundredth place.
[tex]3.53 \ atm \approx P_2[/tex]
The new pressure is approximately 3.53 atmospheres.
Alex built a model to show how light bends when placed into water. To do this, Alex filled a fish tank up with water, and shined a green laser through the water. The angle he shined the laser into the fish tank is the line above the water, and the angle that the light bent is seen below the water. What is a limitation of this model? The model cannot show how light bends. The model is unable to use different colors of light The model cannot calculate the speed of light The model is not 3 dimensional
Answer:
The model cannot show how light bends.
Explanation:
(01.04 L) Complete this sentence. The melting point of a sample will________, when the size of the sample increases.
O decrease
O increase stay the same
O be unable to be determined
Answer:
The melting point of a sample will decrease when the size of the sample increases.
How
many
molecules are in 8.55x10-15 moles of a substance
Answer:
Know this
1mole of a substance contains 6.022x10²³molecules
Now
8.55x10^-15moles x 6.022x10²³molecules/1mole
=5.15x10^9molecules.
What is the mass number of an element?
Please helppppp!!! I have 10 minutes left!!!
Answer:
I think it's the ash can mix with rivers to form mudflows
A balloon has a volume of 2.00 liters at STP. What will happen to the balloon's
volume if it is moved to an elevation where the pressure is the same and the
temperature is much cooler?
Help pass my final
Answer:
The volume of the ballon decreases as much as the temperature is much cooler.
Explanation:
In the problem, the pressure remains constant whereas the temperature decreases. Charles's law states that the temperature is directly proportional to the volume under constant volume.
As in the problem the pressure remains constant but the temperature decreases:
The volume of the ballon decreases as much as the temperature is much cooler.
Which elements are in the compound hydrochloric acid?
A. Helium and carbon
B. Hydrogen and carbon
C. Helium and chlorine
D. Hydrogen and chlorine
Answer:
D. Hydrogen and chlorine
Explanation:
Answer:
d
Explanation:
hydrogen and chlorine
is the compound of hydrochloric acid
4.7C Renewable and Nonrenewable Resources
33 points
Resources can be classified as renewable or nonrenewable. Which of
these resources is classified in the same category as coal?
wood
wind
corn oil
O
petroleum
A jar is filled to the top with water, and a piece of cardboard is slid over the opening so that there is only water in the . If the jar is now turned over, will the cardboard fall off? What will happen if there is any air in the jar?
Answer:
it will all fall unless these is air
Explanation:
Answer:
If you do it carefully enough, a small amount of water will pour out of the glass — that's supposed to happen. But try not to let any air bubbles get into the glass. Finally, slowly remove the hand holding the cardboard in place.
translate AgNO3+KI -> AgI+KNO3 to a sentence
Answer:
AgNO3 + KI -> Agl + KNO3 is a balance equations which states that When Silver Nitrate (AgNO3) mixed or combined with potassium iodide (KI) it results as Silver iodide (Agl) with Potassium nitrate(KNO3)
Hope it helps
The chemical equation: [tex]\rm AgNO_3 + KI \rightarrow AgI + KNO_3[/tex] represents a reaction between silver nitrate ([tex]\rm AgNO_3[/tex]) and potassium iodide (KI) that yields silver iodide (AgI) and potassium nitrate ([tex]\rm KNO_3[/tex]).
A chemical equation is a symbolic representation of a chemical reaction in the form of reactants and products.
In this reaction: [tex]\rm AgNO_3 + KI \rightarrow AgI + KNO_3[/tex]
The silver ion ([tex]\rm Ag^+[/tex]) from the silver nitrate combines with the iodide ion ([tex]\rm I^-[/tex]) from the potassium iodide to form solid silver iodide (AgI), which is a yellow precipitate. The nitrate ion ([tex]\rm NO^{3-}[/tex]) from the silver nitrate combines with the potassium ion ([tex]\rm K^+[/tex]) from the potassium iodide to form solid potassium nitrate ([tex]\rm KNO_3[/tex]), which is a white crystalline solid.
The chemical equation is balanced, with one atom of silver, one atom of iodine, one atom of potassium, three atoms of nitrogen, and nine atoms of oxygen on both sides of the equation.
Therefore, the balanced chemical equation: [tex]\rm AgNO_3 + KI \rightarrow AgI + KNO_3[/tex]represents a double displacement reaction between silver nitrate and potassium iodide that yields silver iodide and potassium nitrate.
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How much heat do you need to raise the temperature of 300 g of ethanol from 0°C to 20°C?
Answer:
14.6
Explanation:
I just took the test
The amount of heat to raise the temperature is 14.7J.
How do you calculate the heat needed to raise the temperature?The specific heat capacity of a substance is the quantity of heat needed to raise the temperature of a unit quantity of the substance by one degree. Calling the amount of heat added Q, which will cause a change in temperature ∆T to a weight of substance W, at a specific heat of material Cp, then Q = w x Cp x ∆T
By applying the formula, we get
Q = w x Cp x ∆T
Q = 300 * 2.46 * 20/1000
Q = 14.760J
What is heat?
Heat is energy that is transferred from one body to another as the result of a difference in temperature.
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__________ naturally occurring isotopes of elements are radioactive, as are isotopes formed in nuclear reactions.
a. All
b. SOme
Explanation:
I think the answer is B cause i dont think All naturally occurring isotopes of elements are radioactive, as are isotopes formed in nuclear reactions. Im not sure
why did plants perform cellular respiration?
Answer:process of cellular respiration allows plants to break down glucose into ATP. ... Although plants use photosynthesis to produce glucose, they use cellular respiration to release energy from the glucose.
Explanation:
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