Answer:
extreme/high
low
minerals
Explanation:
When Magma forms within the mantle what is the most often result? The most often result of this is high temperatures, and low pressure.
Select the correct answer.
Using this activity chart, which reaction will happen when a piece of copper is placed in a lead nitrate solution?
A.
2Cu + 3Pb(NO3)2 3Cu(NO3)2 + 2Pb
B.
No reaction occurs.
C.
2Cu + 3Pb(NO3)2 2Cu(NO3)2 + 3Pb
D.
3Cu + 3Pb(NO3)2 3Cu(NO3)2 + 3Pb
E.
The answer cannot be determined from the information given.
Answer:
B, No reaction will occur
Explanation:
Copper as compared to lead is less reactive. This is the reason when lead is added to copper nitrate solution, it replaces the copper and itself combines with nitrate to form lead nitrate aqueous solution
Lead + Copper(II) nitrate → Copper + Lead (II) nitrate
The same is not the case when the reaction is revered i.e Cu is added to Pb NO3 solution.
Hence, option B is correct
V2O5 + Ca = V + CaO balance the eqaution
Answer: The balanced equation is [tex]V_{2}O_{5} + 5Ca \rightarrow 2V + 5CaO[/tex].
Explanation:
A chemical equation which contains same number of atoms on both reactant and product side is called a balanced chemical equation.
For example, [tex]V_{2}O_{5} + Ca \rightarrow V + CaO[/tex]
Here, number of atoms on reactant side are as follows.
V = 2O = 5Ca = 1The number of atoms on product side are as follows.
V = 1O = 1Ca = 1In order to balance this equation, multiply Ca by 5 on reactant side. Multiply V by 2 and CaO by 5 on product side. Therefore, the equation can be rewritten as follows.
[tex]V_{2}O_{5} + 5Ca \rightarrow 2V + 5CaO[/tex]
Now here, number of atoms on reactant side are as follows.
V = 2O = 5Ca = 5The number of atoms on product side are as follows.
V = 2O = 5Ca = 5Since, there are same number of atoms on both reactant and product side. So, the equation is now balanced.
Thus, we can conclude that the balanced equation is [tex]V_{2}O_{5} + 5Ca \rightarrow 2V + 5CaO[/tex].
What is the reason for heat transfer from one substance to another?
Answer:
Difference in temperature
Explanation:
According to thermodynamics, heat transfer occurs when heat from a high temperature reservoir moves to a low temperature reservoir. For heat to be transferred, the two objects should have different temperatures with one having more temperature than the other. Heat transfer in solids is by conduction, in fluids is by convection and by radiation.
To determine the percentage of bromide in a mixture containing a soluble bromide salt, the procedure from Experiment 10 is used except the bromide is precipitated with aqueous lead (II) nitrate, Pb(NO3)2, forming PbBr2(s). Initially, a 0.5014 g sample of an unknown bromide salt is dissolved in water. Excess Pb(NO3)2 is added to the solution to quantitatively precipitate the bromide from the solution. The resulting mixture is filtered through a piece of filter paper weighing 1.3258 g. After several days of drying, the filter paper and precipitate weighed 1.7895 g. Calculate the percent bromide in the original sample.
Answer:
40.27% Bromide in the original sample
Explanation:
The reaction of bromide ion, Br- with Pb(NO3)2 is:
2 Br- + Pb(NO3)2 → PbBr2(s)
Where the precipitate produced is PbBr2
To solve this question we must find the moles of PbBr2 filtered using its mass. Twice these moles we can find the moles of Br- and its mass. Percent bromide is:
Mass Bromide / Mass Sample (0.5014g) *100
Mass PbBr2:
1.7895g - 1.3258g = 0.4637g PbBr2
Moles -Molar mass: 367.01g/mol-
0.4637g PbBr2 * (1mol / 367.01g) =
0.001263 moles PbBr2 * (2mol Br / 1mol PbBr2) = 0.002527 moles Br
Mass Br -Molar mass: 79.904g/mol-
0.002527 moles Br * (79.904g / mol) =
0.2019g Br
Percent Bromide:
0.2019g Br / 0.5014g * 100 =
40.27% Bromide in the original sampleSea turtles use the earths geomagnetic field to navigate their way home. What is the reason earth has a geomagnetic filed?
Answer:
::Due to the iron inside the earth.
Explanation:
Imagine a sphere of Iron, as big as two-third the size of the moon and as hot as 5700 Kelvin. That is the Earth’s core.
The iron core isn't in its liquid form even at that temperature because it is crushed under immense gravity. This core is surrounded by 2000 km of other metals like iron and nickel which are in their molten state.
The temperature is not the same at every point in this molten layer. The hotter and less dense matter rises up, and the warm denser matter sinks. This causes convectional currents in the interior of the Earth.
Because of the Earth’s spin, there is a force that established called the Coriolis force which causes swirling whirlpools here too.
This flow of molten metals produces electric currents which generate self-sustaining magnetic fields. And as a result of the Coriolis force, all these combined effects add up to produce one big magnetic field engulfing the Earth aligned in one direction.
Why do some states have more representatives than other states? A Because states have different land areasBecause states have different land areas B Because states joined the U.S. in different yearsBecause states joined the U.S. in different years C Because all states have the same number of representativesBecause all states have the same number of representatives D Because states have different populationsBecause states have different populations
Answer:
D
Explanation:
The number of representatives depends on the population size. A state with fewer residents will have less representatives than a state with more residents.
30 POINTS AND BRAINLIEST!!
Which statement is a true statement?
Group of answer choices
Extrusive igneous rocks are formed from the cooling lava that flows above the crust and Intrusive Igneous rocks are formed within the earth's interior.
Intrusive igneous rocks are formed from the cooling lava that flows above the crust and Extrusive Igneous rocks are formed within the earth's interior.
hallo! heres you answer
^Extrusive igneous rocks are formed from the cooling lava that flows above the crust and Intrusive Igneous rocks are formed within the earth's interior.^
is the correct one because
-Intrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth. ... Intrusive rocks have a coarse grained texture.
- Extrusive Igneous Rocks: Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth's surface.
Gold has a very low specific heat capacity, just 0.13 J/goC. If a gold class ring has a mass of 4 grams and is heated from 0oC to 100oC, what is the amount of energy the gold class ring has absorbed? a 52 Joules b 0.325 Joules c 400 Joules d 3076.92 Joules
Answer:
a 52 Joules
Explanation:
Specific heat capacity of Au = 0.13 J/g° C
mass = 4 gram
initial temperature = 0° C
final temperature = 100° C
We are to determine the amount of energy absorbed
Using the formula:
Q = mcΔθ
Q = 4 × (0.13) J/g° C ×(100-0)
Q = 52 Joules
What is the volume in liters that is needed to create a 2.3 M solution with 3.7 moles of Fe(OH)2? Round your answer to 1 decimal.
Answer:
Explanation:
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