Europeans wanted to trade things for rubber and oil with Africa
Where does most regular lightning occur?
A. The stratosphere
B. The troposphere
C. The Mesosophere
Answer:
the troposphere because we are living in atmosphere when the atmosphere next troposphere the sudden flashes of light and discharge resulting atmosphere condition sound waves of trambeling
thank you
how many sulfer is in h2s
Answer:
H2S is a hydride of sulfur while SO2 is an oxide of sulfur.
Explanation:
PLEASE HELP NEED ANSWER QUICK
An evacuated cylinder has a volume of 50 liters. If 20 liters of nitrogen gas and 20 liters of oxygen gas are pumped into this evacuated cylinder, how much of the cylinder is filled with the two gases? (3 points)
Only 80 percent because only 40 out of 50 liters are used.
The entire container because gases will expand to fill it.
Only 80 percent because of the low molecular weight of the two gases.
The entire container because of the low molecular weight of the two gases.
Answer: The entire container because gases will expand to fill it.
Explanation:
Which is best supported by the data in the chart
Answer:
B
Explanation:
What is the name of this molecule?
H
O A. Propene
• B. Butene
C. Butane
D. Propane
Answer:
D
explaination:
the "prop" stands for three carbons , and this is an alkane so that means it only has single bonds between carbon and hydrogen , hence the name propane
Can someone please help me? :(
D. Communication
Answer:
Cooperation
Explanation:
Those animals are understanding the needs of each other.
The diagram below shows the different phase transitions that occur in matter.
Three bars are shown labeled Solid, Liquid, and Gas. They are connected by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid.
Which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar?
1
3
4
5
Answer:
# 5
Explanation:
The question describes silver being "poured" into a mold and cools to become a solid bar. This is the phase of liquid to solid. When a element cools down below it's freezing points to become a solid.
Liquid to Solid Definition:
Freezing, or solidification, is a phase transition in which a liquid turns into a solid when its temperature is lowered to or below its freezing point. All known liquids, except helium, freeze when the temperature is low enough.
A balloon that can hold 85 L of air is inflated with 3.5 moles of gas at a pressure of 1.0 atmosphere. What is the temperature of the balloon?
Answer:
295.96 K ( = 22.81 degrees C)
Explanation:
PV = n RT R = .082057 L-Atm / (K-Mol) n = 3.5 P = 1 atm V = 85 liters
(1)(85) = 3.5 (.082057)(T)
solve for T = 295.96 K
.How many grams of NaCl required to form a 500ml solution with a molarity of 0.5M , the molar mass of NaCl is 58.5g/mol?
2C₂H₂(g) + 5O₂(g) —> 4CO₂(g) +2H₂O(g)
b. How many moles of H₂O are produced when 64.0g C₂H₂ burns in oxygen?
How/why do acids and bases different from weak acids and bases?
Answer:
Weak acids and bases are less than 100% ionized in aqueous solution
Explanation:
hope this helps
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A gas is contained in a tick walled balloon. When the pressure changes from 2. 95atm to ___atm, the volume changes from 7. 456L to 4. 782L and the temperature changes from 379k to 212k
A gas is contained in a tick-walled balloon. When the pressure changes from 2. 95atm to 2.57 atm. p.
What is pressure?Pressure is a force perpendicular to the unit area on which it is applied.
Given that, P1, the initial pressure is 2.95 atm
The initial volume, V1 = 7.456 L
The final volume, V2 = 4.782 L
The initial temperature, T1 = 379k
The final temperature, T2 = 212k
The equation will be
[tex]\dfrac{P_1V_1}{T_1 } =\dfrac{P_2V_2}{T_2}[/tex]
Putting the values in the equation
[tex]\dfrac{2.95 \times 7.456 L }{379k } =\dfrac{P_2\times 4.782 L}{212k}\\\\\\P_2 = \dfrac{2.95 \times 7.456 L \times 212k }{379k \times 4.782 L} = 2.57\;atm.[/tex]
Thus, the pressure changes from 2. 95atm to 2.57 atm p.
Learn more about pressure
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what is after gallium on the periodic table?
Answer:
Germanium or Ge
Explanation:
It is on the perioidic table. Gallium has an atomic number of 31 and Germanium has an atomic number of 32.
Elements strontium and beryllium sboth form a bond with fluorine with similar chemical formulas the similartiy in their formulas is due to:_________
Answer:
having the same number of valence electrons
Explanation:
A sample of 10.5g of Nirtogen reacts with 20.2g of Hydrogen to produce ammonia.
3H2(g)+N2(g)=2NH3(g)
a. What is the theoretical yield of ammonia?
b. What is the limiting reactant?
c. What is the excess reactant?
d. How much is the excess reactant?
e. If 4.1 g of ammonia is actually produced, what is the precent yield?
Answer:
Explanation:
a) The mass of the reactants is 10.5 + 20.2 = 30.7, so the theoretical yield of ammonia is also 30.7 grams (by the law of conservation of mass)
b) The gram-formula mass of diatomic nitrogen is about 28.014 g/mol, so 10.5 grams of nitrogen is 10.5/28.014 = 0.37 moles. In comparison, the gram-formula mass of diatomic hydrogen is about 2.016 g/mol, so 20.2 grams of hydrogen is about 20.2/2.016 = 10.0 moles. Dividing this by 3, we get 3.33 moles. So, nitrogen is the limiting reactant.
c) Hydrogen
d) 0.37 moles of nitrogen is consumed, so (0.37)(3) = 1.11 moles of hydrogen is consumed. This means that 3.33-1.11=2.22 moles of hydrogen are remaining, which has a mass of (2.22)(2.016)=4.47 grams.
e) (actual)/(theoretical) * 100 = (4.1)/(30.7) * 100 = 13%
Which term describes this reaction?
O addition
O condensation
O elimination
O substitution
Answer:
addition
Explanation:
I really don't know why
An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity?
A. carbon
B. fluorine
C. nitrogen
D. oxygen
I have 0.445 L of a 1.8 M NaCl solution. If I boil away some water until the volume of the solution reaches 0.250 L, what will the new molarity of the solution become?
Answer:
3.2 M
Explanation:
M1V1=M2V2
1.8*.445=.801
.801/.25=3.204
Molarity = M2 = 3.2 M
2. How many grams of CaCl₂ are needed to prepare 125 mL of a 2.00 M solution of aqueous CaCl₂(aq)?
(M, molarity)
Answer:
The solution contains 0.50 mol or 55 g of CaCl2.
Explanation:
Speed is defined as __________.
A) the change in position and direction over time
B) the change in acceleration over time
C) the change in velocity over time
D) the distance traveled over time
Answer:D)
Explanation: the distance traveled over time
When 20.00 mL of an unknown monoprotic acid is titrated with 0.125 M NaOH, it takes 15.00 mL to reach the endpoint. What is the molarity of the unknown acid?
Answer:
About 0.0940 M.
Explanation:
Recall that NaOH is a strong base, so it dissociates completely into Na⁺ and OH⁻ ions. Because the acid is monoprotic, we can represent it with HA. Thus, the reaction between HA and NaOH is:
[tex]\displaystyle \text{HA}_\text{(aq)} + \text{OH}^-_\text{(aq)} \longrightarrow \text{H$_2$O}_\text{($\ell$)} + \text{A}^-_\text{(aq)}[/tex]
Using the fact that it took 15.00 mL of NaOH to reach the endpoint, determine the number of HA that was reacted with:
[tex]\displaystyle \begin{aligned} 15.00\text{ mL} &\cdot \frac{0.125\text{ mol NaOH}}{1\text{ L}} \cdot \frac{1\text{ L}}{1000\text{ mL}} \\ \\ &\cdot \frac{1\text{ mol OH}^-}{1\text{ mol NaOH}} \cdot \frac{1\text{ mol HA}}{1\text{ mol OH}^-}\\ \\ & = 0.00188\text{ mol HA}\end{aligned}[/tex]
Therefore, the molarity of the original solution was:
[tex]\displaystyle \left[ \text{HA}\right] = \frac{0.00188\text{ mol}}{20.00\text{ mL}} \cdot \frac{1000\text{ mL}}{1\text{ L}} = 0.0940\text{ M}[/tex]
In conclusion, the molarity of the unknown acid is about 0.0940 M.
a. Two possible Lewis electron-dot diagrams for CO2 are shown above. Explain in terms of formal charges why diagram Z is the better diagram.
b. Identify the hybridization of the valence orbitals of the C atom in the CO2 molecule represented in diagram Z.
The carbon atom is SP hybridized while the oxygen atom is SP2 hybrized.
What are resonance structures?The term resonance structures are those structures that can be used to explain the bonding in a molecule. Sometimes, a single structure is insufficient in explaining the structure of a compound.
Now looking at the two sturctures, Z is better because there are mo formal charges which make the molecle less stable unlike in X. In the CO2 molecule, the carbon atom is SP hybridized while the oxygen atom is SP2 hybrized.
Learn kire about hydridization of atoms: https://brainly.com/question/5637463
what is the molarity of a solution that contains 1.25 moles of K2SO4 dissolved into water to make 1.5 liters of solution?
Answer: 0.8 M
Explanation:
molarity = (moles of solute)/(liters of solution) = 1.25/1.5 = 0.8 M
Easy question
Who is the youngest in ateez
Answer: jongho
Explanation:
Answer:
Choi JongHo
Explanation:
A molecule that is _____ loses electrons, and a molecule that is _____ gains electrons. oxidized; reduced negative; positive reduced; oxidized weak; polar None of the other answer options is correct.
Answer:
Oxidized, and reduced
Explanation:
The acronym LEO, and GER may be helpful, or think of a specific example (such as a copper 2+ ion being reduced into copper).
Loose
Electron
Oxidization
Gain
Electron
Reduction
from this, we know that a molecule which looses electrons is being oxidized, and a molecule that gains electrons is being reduced.
What type of heat transfer does not need to travel through matter?.
According to the brønsted–lowry definition of acids-base reaction, acids have the ability to.
Answer:
gain, or accept, a hydrogen cation
Explanation:
Hope this helps! :)
Calculate the volume occupied by 56. 5 g of argon gas at stp.
Answer:
39.95 hope this helps
Explanation:
2.00 L of 0.800 M NaNO3 must be prepared from a solution known to be 2.50 M in concentration.How many mL are required? Plus don't send me virus links!!!! pls explain how to do it
Answer:
1.36 × 10³ mL of water.
Explanation:
We can utilize the dilution equation. Recall that:
[tex]\displaystyle M_1V_1= M_2V_2[/tex]
Where M represents molarity and V represents volume.
Let the initial concentration and unknown volume be M₁ and V₁, respectively. Let the final concentration and required volume be M₂ and V₂, respectively. Solve for V₁:
[tex]\displaystyle \begin{aligned} (2.50\text{ M})V_1 &= (0.800\text{ M})(2.00\text{ L}) \\ \\ V_1 & = 0.640\text{ L} \end{aligned}[/tex]
Therefore, we can begin with 0.640 L of the 2.50 M solution and add enough distilled water to dilute the solution to 2.00 L. The required amount of water is thus:
[tex]\displaystyle 2.00\text{ L} - 0.640\text{ L} = 1.36\text{ L}[/tex]
Convert this value to mL:
[tex]\displaystyle 1.36\text{ L} \cdot \frac{1000\text{ mL}}{1\text{ L}} = 1.36\times 10^3\text{ mL}[/tex]
Therefore, about 1.36 × 10³ mL of water need to be added to the 2.50 M solution.
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What happens during reduction?
Loss of electrons
Gain of electrons
Loss of protons
Gain of protons
Answer:
The answer is Gain of electrons
Explanation:
Oxidation is the process of losing an electrons, while reduction is the process of gaining them.
Answer:
Gain of electrons