solve for x 5 to the power 2 x + 4 - 25 to the power x - 1 is equals to
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Answer:
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Related Questions
Describe a method to investigate how the temperature changes when different masses of ammonium nitrate are dissolved in water
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Answer:
Endothermic and Exothermic Reactions
Endothermic and Exothermic ReactionsIn this experiment you are investigating whether dissolving ammonium nitrate in water is an endothermic or exothermic reaction. An endothermic reaction absorbs energy from its surroundings (heat), so the reaction gets colder.
Explanation:
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✓ What kind of carbon storages would be the most affected by humans?
Answers
Answer: Burning fuels?
Explanation: I’m not very sure actually
32)
In some water purification plants, solid matter is skimmed off the top of the water. This is separating a mixture by what method?
A)
chromatography
B)
evaporation
floatation
D)
sifting
Answers
Suppose you are designing a heat exchanger to remove energy from a motor as quickly as possible. Energy will be transferred from the motor to the heat exchanger. Then the energy will be transferred from the heat exchanger to the air. The table shows the thermal conductivities of a few substances as measured in W/m·K. The greater the thermal conductivity, the faster the rate of energy transfer. Which material would be the best choice?
a: copper
b: glass
c: steel
d: polystyrene
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How many grams of Fe2O3 are formed when 51.3 grams of iron, Fe, react completely with oxygen, O2? 4 Fe + 3 O2 --> 2 Fe2O3
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The Fe is our limiting reactant here. First, convert the mass of Fe given to moles of Fe by dividing mass by the molar mass:
(51.3 g Fe)/(55.845 g/mol) = 0.9186 mol Fe.
According to the balanced equation, 2 moles of Fe2O3 are produced for every 4 moles of Fe that are consumed. In other words, half as many moles of Fe2O3 will be produced as there are Fe that react:
(0.9186 mol Fe)(2 mol Fe2O3/4 mol Fe) = 0.4593 mol Fe2O3.
Finally, convert the moles of Fe2O3 back to grams by multiplying by the molar mass of Fe2O3:
(0.4593 mol Fe2O3)(159.6882 g/mol) = 73.3 g Fe2O3.
So, 73.3 grams of Fe2O3 are formed.
What are the controlled, independent, and dependent variables in a basic density column experiment?
WILL MAKE BRAINLIEST
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Answer:
The Independent Variable is what we change or control in the experiment. The Dependent Variable is what we are testing and will be measured in the experiment. The Control Variables are what we keep the same during the experiment to make sure it's a fair test. hope this helps =)
Explanation:
Which of the following defines a strong acids/bases
a
They do not dissociate
b
They can deadlift a lot
c
They partially dissociate into ions in solution
d
They completely dissociate into ions in solution
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Answer:
d .yes it is dissociate ions (hydrogen or hydroxide)completely
Explanation:
follow me Think you bice study
HURRY ILL GIVE BRAINLIEST!
Match the cause to its effect.
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Answer:
Cattles are giving nutrition supply throughout the year----some animals require nutrient enhancement for health
calves are given colostrum at birth----newborns require antibodies from their mothers
I dont want to write, so you know what the last option is
Explanation:
:) hope this helps
solid sodium chloride is dissolved in water. the sodium chloride solution is electrolysed in the apparatus. state why sodium chloride solution , rather than solid chloride must be used in this experiment.
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Answer: water solutions conducts charge
Explanation: solid sodium chloride is n insulator.NaCl is dissolved in water
In ionic forms. In solution there are Na+ and Cl- ions which can transfer charge.
The complete
conversion of 90.0
grams of hydrogen to
ammonia would require
how many moles of
nitrogen gas?
Answers
Answer:
15moles
Explanation:
The balanced equation of this reaction is as follows:
N2 + 3H2 → 2NH3
Molar mass of H2 = 2g/mol
mole = mass/molar mass
mole = 90/2
mole = 45moles.
Based on the above balanced equation, 1 mole of nitrogen gas (N2) reacts with 3 moles of hydrogen gas (H2)
Hence, 45moles of hydrogen gas will produce (45 × ⅓) = 15moles of nitrogen gas (N2).
Answer:
Its 14.9 for those who are doing the escape room :)
Explanation:
The properties of a substance are not affected by chemical reactions.
O True
O False
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Answer:
False
Explanation:
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The copper chloride solution used in the investigation contained 300 grams per dm of
solid CuCl2 dissolved in 1 dm of water.
The student used 50 cm of copper chloride solution in each experiment.
Calculate the mass of solid copper chloride used in each experiment.
[3 marks]
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Work=? time=5s Power = 40w
Answers
Answer:
200 J
Explanation:
Work = Power x time
Work = (40w)(5s)
Work = 200 J
Potassium
©State what would be observed if a lighted
match stick was held in the mouth
of the
beaker.
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Answer:
We observe that hydrogen burns at mouth of beaker with blue flame and pop sound is heard. It is a chemical change.How many grams of sulfur trioxide are required to produce 2.00 mol of sulfuric acid in an
excess of water?
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⚠️NO LINKS⚠️(it will get reported)
In a lab, students measured the mass of an unknown metal to be 46.4 g. The metal sample releases 769 J when it is cooled from 101.0°C to 30,00 °C, the
metal is most likely
Lead
. Copper
Mercury
Silver
Answers
Answer:
I'm thinking cooper but not sure
लेख्नुहोस् । (Deserts are very hot during the day and very cold
during the night. Give reason.)
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Because deserts have such little water vapor in the air, it makes it harder to trap heat or cold in a desert. And at night, the sun no longer heats the desert and the heat from the day doesn't stay trapped. Because of this, some deserts can get extremely cold at night, dropping to temperatures below 40F.
Hope this helps!! Have a wonderful day!!
It is actually sand, which turns the entire phenomenon hot. Sand cannot hold the heat. It acts like a mirror to the sun. During the daytime, it stays warm, and when the Sun is absent it loses all its heat making the nights colder. There’s nothing in the desert that can either absorb heat from the sun or hold it on the surface when the sun is set.
Why is nuclear fusion not used to produce electricity?
O A. Fusion requires conditions that exist only in the cores of stars.
B. Fusion produces nuclear waste.
C. Fusion requires steam turbines, which are expensive.
D. Fusion produces only a small amount of energy.
Answers
Answer: A is correct for ape.x
Explanation:
Nuclear fusion not used to produce electricity because fusion requires conditions that exist only in the cores of stars. Hence option A is correct.
What is nuclear fusion?Nuclear fusion is defined as the process that produces a single heavier atomic nucleus from the union of two lighter ones while releasing enormous quantities of energy. Controlled atom fusion generates around four million times as much energy as controlled nuclear fission and chemical processes like burning coal, oil, or gas.
Normal electrostatic interactions between positively charged nuclei prohibit them from coming close enough to collide and allow fusion to happen, hence fusion is not feasible. Fusion might be used to generate electricity economically if there was a sufficiently big and sustained energy "profit".
Thus, nuclear fusion not used to produce electricity because fusion requires conditions that exist only in the cores of stars. Hence option A is correct.
To learn more about nuclear fusion, refer to the link below:
https://brainly.com/question/12701636
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Ralph's friend invited him to attend a hard rock concert. Ralph did not want to go because he assumed other people who attended would be aggressive and unruly. Ralph's attitude is BEST described as an example of
prejudice
ambiguity
nonconformity
discrimination
impression formation
Answers
Answer:
Prejudice
Explanation:
Answer: your answer would be prejudice.
A sample of hydrogen gas has a volume of 145 mL when measured at 44
degrees C and 1.47 atm. What volume would the hydrogen sample occupy
at STP?
Answers
Answer:
[tex]186.01\ \text{mL}[/tex]
Explanation:
[tex]P_1[/tex] = Initial pressure = 1.47 atm
[tex]P_2[/tex] = Final pressure = [tex]10^5\ \text{Pa}[/tex]
[tex]T_1[/tex] = Initial temperature = [tex]44^{\circ}\text{C}[/tex]
[tex]T_2[/tex] = Final temperature = [tex]273.15\ \text{K}[/tex]
[tex]V_1[/tex] = Initial volume = 145 mL
[tex]V_2[/tex] = Final volume
We have the relation
[tex]\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}\\\Rightarrow V_2=\dfrac{P_1V_1T_2}{T_1P_2}\\\Rightarrow V_2=\dfrac{1.47\times 101325\times 145\times 273.15}{(44+273.15)\times 10^5}\\\Rightarrow V_2=186.01\ \text{mL}[/tex]
Final volume of the sample is [tex]186.01\ \text{mL}[/tex].
Which of the following CANNOT be used as a conductor?
Copper
Water
Paper
Gold
Answers
1. A substance containing two or
more elements bonded together.
Answers
Answer:
it's molecule
i have to solve it in 20 characters XD
Which are different structures of the eye? Select four options.
please help !!!!!!!!
pupil
cochlea
cornea
auricle
retina
lens
Answers
Answer:
Pupil, Cornea, Retina, and Lens
Explanation:
DESPERATE!!!!! What is the molar mass of an unknown gas that has a density of 2.29 g/L at a pressure of 0.75 atm and a temperature of 88. degrees Celsius?
Answers
Answer:
The molar mass of the gas is 90.4g/mol
Explanation:
To solve this question we have to use the equation:
d = PM / RT
Where d is density of the gas = 2.29g/L
P is pressure = 0.75atm
M is molar mass of the gas = ??
R is gas constant = 0.082atmL/molK
T is absolute temperature = 88°C + 273.15 = 361.15K
Solving for M:
dRT / P = M
2.29L*0.082atmL/molK*361.15K / 0.75atm = M
90.4g/mol = M
The molar mass of the gas is 90.4g/mol
Can someone pls help me?
Answers
Answer:
A) day and night
Explanation:
please mark brainliest, i need it for a new rank<33
Answer:
You answer is A
Explanation:
Without the earth rotating on its axis, we wouldn't have day or night because we will be stuck facing the sun or the moon forever.
How many grams of BaCl2 can be made from 6 moles of Ba?
Answers
Answer:
823.98
Explanation:
Since there is only one Ba per atom you simply times 1 by 6 to get the number of mols of Ba per atom, then you times this by the atomic mass of Ba on the periodic table
0 Which is not a chemical change?
A Iron combines with oxygen to form
rust.
B Wax melts as it absorbs heat from a
flame.
C Pure sodium explodes when dropped
in water.
D Glucose molecules are produced in a
plant leaf.
Answers
Answer:
B, wax melting
Explanation:
When wax melts, the form of matter is the only thing that changes. Wax in this case goes from a solid to a liquid, and this process can be reversed when it cools. Hence labeling it a physical change instead.
if 3.75 moles of LiCl is added to 72.7 ml of water, what is the molarity?
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Our solution will have a volume of 72.7 mL, or 0.0727 L, since the addition of soluble LiCl will not appreciably affect the volume of the solvent.
Our solute is the LiCl, of which we have 3.75 moles.
Thus, the molarity of our LiCl solution will be (3.75 moles LiCl)/(0.0727 L) = 51.5 M LiCl.
what are items that are ferromagnetic material
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Answer:
I'll give you three examples:
Iron
Cobalt
Nickel
a. silicon
b. carbon
c. beryllium
d.chromium
Answers
Answer:
It's a. silicon
Explanation: