Answer:
Gold is a metal lol
Explanation:
Chemically, gold is a transition metal and a group 11 element
Calculate the volume occupied by 2.00 moles of H₂ at 300.0 K and 1.25 atm
Answer:
V = 39.38 L
Explanation:
Given that,
No. of moles of H₂, n = 2
Temperature, T = 300 K
Pressure, P = 1.25 atm
We need to find the volume occupied by the gas. We can use the ideal gas law to find it such that,
[tex]PV=nRT[/tex]
Where
R is gas constant, R = 0.08205 L-atm/mol-K
V is volume of the gas
Rearranging the above formula for V. So,
[tex]V=\dfrac{nRT}{P}\\\\V=\dfrac{2\times 0.08205\times 300}{1.25}\\\\V=39.38\ L[/tex]
So, the volume occupied by the gas is 39.38 L.
solve for v -20=-5/3v
Answer:
v = 15/2
Decimal Form:
v = 7.5
Mixed Number Form:
v = 7 1/2
Explanation:
Hope this helps!
A carrot was cut into many pieces, and moved into a freezer what change is it
Answer:
Physical change
Explanation:
Cutting and freezing are both examples of physical changes that do not alter the chemical composition or properties of the object/substance.
Answer:
physical change
Explanation:
carrot lost its original shape
Which best explains the importance of indicator species?
Answer:
Explanation:
ndicator species (IS) are animals, plants, or microorganism used to monitor changes in our environment. For example, they can tell us about the impact of pollution on an ecosystem, or how well an impaired environment is being managed or restored.
Identify this reaction
HBr+ Al(OH)3 —-> H2O + AlBr3
Neutralization reaction
Hello, in the following reaction HBr is strong acid when reacts with Amphoteric Aluminium hydroxide gives water & AlBr3 as salt.
We know that in neutralization reaction
acid & bases reacts to give salt and water. Hence following reaction is neutralization reaction.
Thanks for joining brainly community!
What's the similarity between Gas and Liquid?
Answer:
Liquids and gases flow easily because their particles can move or slide past one another.
Explanation:
Hope this helped Mark BRAINLEST!!
Describe how the particles are arranged in a solid, liquid, and gas.
Answer:
Particles in a: gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation:
2CO + O2 --> 2CO2
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
Answer:
10 L of CO₂.
Explanation:
The balanced equation for the reaction is given below:
2CO + O₂ —> 2CO₂
From the balanced equation above,
2 L of CO reacted to produce 2 L of CO₂.
Finally, we shall determine the volume of CO₂ produced by the reaction of 10 L CO. This can be obtained as follow:
From the balanced equation above,
2 L of CO reacted to produce 2 L of CO₂.
Therefore, 10 L of CO will also react to produce 10 L of CO₂.
Thus, 10 L of CO₂ were obtained from the reaction.
10L of carbon dioxide will be produced from 10L of carbon monoxide.
According to this question, carbon monoxide reacts with oxygen gas to form carbon dioxide according to the following reaction:2CO + O2 → 2CO22 moles of carbon monoxide produces 2 moles of carbon dioxideTherefore, 10 litres of carbon monoxide (CO) will produce 10 × 2 = 20/2 = 10L of carbon dioxide (CO2).Learn more at: https://brainly.com/question/2040396?referrer=searchResults
16. Which is an example of a transverse wave? (1 point)
Answer:
Transverse wave,Explanation:
motion in which all points on a wave oscillate along paths at right angles to the direction of the wave's advance. Surface ripples on water, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.Answer:
A WAVE CARRIED THROUGH A ROPE
Explanation:
I chose a wave on water and got it WRONG
CAN SOMEBODY PLS HELP...
Answer:
Maybe you could do something with nuclear power plants and how we use those to create electrical energy for our phones, houses etc?
what part of the brain helps us process sounds?
Answer:
Temporal lobes
Explanation: They are right above the ears...And they help us process sounds...They are also important for learning and memory, as well as the understanding of language
Please help with these two I’ll give you brainiest!
I need help with this!
Answer:
FILTRATION.
filter the solution and separate sand and salt solution
evaporation
evaporate the water and salt mixture and salt will be left as a solid
Find the molar mass of PCI3
Answer: around 137.33
Explanation:
Weather conditions (high or low temperature) to the mineral wool.
Answer:
high temperature
Explanation:
A reaction was suppose to produce 20 L of gas. Only 12 litters of gas were produced in the lab. What is the percent yield for this reaction?
Answer:
[tex]\boxed {\boxed {\sf 60 \%}}[/tex]
Explanation:
Percent yield is a ratio of the actual yield to the theoretical yield. It is found using this formula:
[tex]\% \ yield= \frac {actual \ yield}{theoretical \ yield} *100[/tex]
The actual yield is 12 liters, because that was actually produced in the lab.
The theoretical yield is 20 liters, because that was the expected yield.
[tex]\% \ yield= \frac {12 \ L}{20\ L} *100[/tex]
[tex]\% \ yield= 0.6*100[/tex]
[tex]\% \ yield= 60[/tex]
For this reaction, the percent yield is 60%.
In a 0.100M solution of a weak polyprotic acid what is the equilibrium concentration of A-2?
H2A+H20-H30+A-2
Ka1=7.5x10^-5
Ka2=6.2x10^-8
answer= ?x10^?
Calculate the percentage of water for each of the hydrates listed:
a. MgSO4 ● 7H2O
b. LiC2H3O2 ● 2H2O
c. Al(NO3)3 ● 9H2O
Answer:
Mass ratio:
a. Approximately [tex]51.2\%[/tex].
b. Approximately [tex]35.3\%[/tex].
c. Approximately [tex]43.2\%[/tex].
Explanation:
Look up the relative atomic mass of each element on a modern periodic table:
[tex]\rm Mg[/tex]: [tex]24.305[/tex].[tex]\rm S[/tex]: [tex]32.06[/tex].[tex]\rm O[/tex]: [tex]15.999[/tex].[tex]\rm H[/tex]: [tex]1.008[/tex].[tex]\rm Li[/tex]: [tex]6.94[/tex].[tex]\rm C[/tex]: [tex]12.011[/tex].[tex]\rm Al[/tex]: [tex]26.982[/tex].[tex]\rm N[/tex]: [tex]14.007[/tex].For example, the relative atomic mass of [tex]\rm Al[/tex] is [tex]26.982[/tex]. Hence, the mass of one mole of [tex]\rm Al\![/tex] atoms would be (approximately) [tex]26.982\; \rm g[/tex].
Calculate the formula mass of [tex]\rm H_2O[/tex]:
[tex]\begin{aligned} & M({\rm H_2O}) \\ &= 2 \times 1.008 + 15.999 \\ &= 18.015\; \rm g \cdot mol^{-1}\end{aligned}[/tex].
Calculate the formula mass for each of the hydrates:
[tex]\begin{aligned}& M({\rm MgSO_4 \cdot {7\, H_2O}}) \\ &= 24.305 + 32.06 + 4 \times 15.999 \\ & \quad\quad + 7 \times (2 \times 1.008 + 15.999) \\ &= 246.466\; \rm g \cdot mol^{-1}\end{aligned}[/tex].
[tex]\begin{aligned}& M({\rm LiC_2H_3O_2 \cdot {2\, H_2O}}) \\ &= 6.94 + 2 \times 12.011 + 3 \times 1.008 + 2 \times 15.999 \\ & \quad\quad + 2 \times (2 \times 1.008 + 15.999) \\ &= 102.014\; \rm g \cdot mol^{-1}\end{aligned}[/tex].
[tex]\begin{aligned}& M({\rm Al(NO_3)_3 \cdot {9\, H_2O}}) \\ &= 26.982 + 3 \times (14.007 + 3 \time 15.999) \\ &\quad \quad + 9 \times (2 \times 1.008 + 15.999) \\ &= 375.129\; \rm g \cdot mol^{-1}\end{aligned}[/tex].
The mass of [tex]1\; \rm mol[/tex] of [tex]{\rm MgSO_4 \cdot {7\, H_2O}}[/tex] formula units is [tex]246.466\; \rm g[/tex].
There are seven mole of [tex]\rm H_2O[/tex] formula units in that many [tex]{\rm MgSO_4 \cdot {7\, H_2O}}[/tex] formula units. The mass of that [tex]7\; \rm mol[/tex] of [tex]\rm H_2O\![/tex] formula units would be [tex]7 \; \rm mol \times 18.015\; \rm g \cdot mol^{-1} = 127.105\; \rm g[/tex].
Hence, the percentage mass of [tex]\rm H_2O[/tex] in [tex]{\rm MgSO_4 \cdot {7\, H_2O}}[/tex] would be:
[tex]\begin{aligned}\frac{127.015\; \rm g}{246.466\; \rm g} \approx 51.2\%\end{aligned}[/tex].
Similarly:
Mass of [tex]1\;\rm mol[/tex] of [tex]\rm LiC_2H_3O_2 \cdot {2\, H_2O}[/tex] formula units: [tex]102.014\; \rm g[/tex].Mass of the [tex]2\; \rm mol[/tex] of [tex]\rm H_2O[/tex] in that [tex]1\;\rm mol[/tex] of [tex]\rm LiC_2H_3O_2 \cdot {2\, H_2O}[/tex] formula units: [tex]2 \; \rm mol \times 18.015\; \rm g \cdot mol^{-1} = 36.030\; \rm g[/tex].Percentage mass of [tex]\rm H_2O[/tex] in [tex]\rm LiC_2H_3O_2 \cdot {2\, H_2O}[/tex]: [tex]\begin{aligned}\frac{36.030\; \rm g}{102.014\; \rm g} \approx 35.3\%\end{aligned}[/tex].Mass of [tex]1\;\rm mol[/tex] of [tex]\rm Al(NO_3)_3 \cdot {9\, H_2O}[/tex] formula units: [tex]375.129\; \rm g[/tex].Mass of the [tex]9\; \rm mol[/tex] of [tex]\rm H_2O[/tex] in that [tex]1\;\rm mol[/tex] of [tex]\rm Al(NO_3)_3 \cdot {9\, H_2O}[/tex] formula units: [tex]9 \; \rm mol \times 18.015\; \rm g \cdot mol^{-1} = 162.135\; \rm g[/tex].Percentage mass of [tex]\rm H_2O[/tex] in [tex]\rm Al(NO_3)_3 \cdot {9\, H_2O}[/tex]: [tex]\begin{aligned}\frac{162.135\; \rm g}{375.129\; \rm g} \approx 43.2\%\end{aligned}[/tex].The compound that forms between nitrogen and chlorine is
a. ionic
b. molecular/covalent
Answer:
Covalent bonding is a type of chemical bonding which is characterized by atoms sharing electrons. For nitrogen and chlorine to covalently bond, nitrogen needs 3 electrons. Chlorine only has one electron therefore two more chlorine molecules are needed. Because one atom of nitrogen needs 3 atoms of chlorine to bond, the formula will be NCl3.
has 2 valence electrons. It has electron shells and is reactive than Boron. This element has the same number of electron shells as has 4 valence electrons. It has electron shells and is reactive than Aluminum. This element has the same number of electron shells as
Answer:
Beryllium.
Silicon.
Explanation:
Beryllium has 2 electrons in their outermost shell and has highly reactive than boron because Boron needs 3 electrons to lose whereas, beryllium needs to lose only 2 electrons to get stability. Silicon has 4 electrons in its outermost shell and is less reactive than aluminum because aluminum has to lose 3 electrons to get stability as compared to silicon which needs 4 electrons to lose to be stable and non-reactive.
How many grams are in 2.0 x 10-5 moles of uranium?
Answer choices
5.3 x 10-3 grams
4.8 x 10-3 grams
1.4 x 10-3 grams
2.2 x 10-3 grams
Answer:
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When a sound is louder what
measurement gets bigger?
Answer:
amplitude or pitch
Explanation:
Which of the following is the main cause of acid rain?
water vapor
photosynthesis
ozone depletion
smog
Answer:
photosynthesis
Explanation:
Answer:
Photosynthesis
Explanation:
I had it on a quiz.
Consider 2 pots of water. Each pot has the same diameter, but pot A is deeper than pot B and so there is more water in pot A. If both pots are exposed to the same amount of heat for 5 minutes, which pot will contain the hottest water after 5 minutes? Why?
Answer:
POT B
Explanation:
Because Pot B contains lesser amount of water, it is going to have the hottest water compared to pot A.
Since the amount of heat is constant, in pot B less water molecules would share the heat, compared to pot A where a larger amount of water would have to share the heat.
Calculate the percent yield if the theoretical yield is 50.0 g of a
product and the actual yield is 42.0 g.
Answer:
84% yield
42/50 = 0.84 = 84%
3.0 moles of BaO are mixed evenly into a 2.0 L. What is the molarity of this
solution?
Answer: 1.5 moles/L
Explanation:
Molarity = moles/ Liters
to find the molarity of BaO: 3moles/2L = 1.5 moles/L
Pleasee help me pleaseeeeeeeeeeee i need help
How does the water help a fossil form?
The answer is 1
Which of the following is an example of a learned response?
A.
A bird avoids moths that make it sick after eating one.
B.
A person's leg moves when a doctor taps his or her leg with a mallet.
C.
A plant turns to follow the sun during the day.
D.
An adult salmon is able to return to the river where it hatched.
Which of these models shows the position of the sun moon and Earth that will have the LARGEST effect on the tides? _________
Answer: Your answer is J
Explanation: This can occur when moon is closest to earth.
So the moon in between earth and sun.
Also factually the moon can effect human behavior, because humans are made up of some percent of water.
When two continental plates diverge, there is a valley in between these two plates that forms as the continental crust widens. What geological event is
a result of this interaction?
A) Hurricanes
B) Volcanoes
C) Tsunamis
D) Earthquakes
Answer:
B. Volcanoes
Explanation:
B. Volcanoes
Answer:
B:Volcanoes
Explanation:
because valley rift develops