Answer:
Oxygen and sulfur have similar chemical properties because both elements have six electrons in their outermost electron shells. Indeed, both oxygen and sulfur form molecules with two hydrogen atoms: water and hydrogen sulfide
Explanation:
If an unknow metal has the mass of 40g and volume of 75ml, what is the density of the metal?
Answer:
d = 0.53 g/mL
Explanation:
Given that,
Mass of an unknown metal = 40 g
The volume of the metal = 75 mL
We need to find the density of the metal. We know that,
Density = mass/ volume
[tex]d=\dfrac{40\ g}{75\ mL}\\\\d=0.53\ g/mL[/tex]
So, the density of the metal is 0.53 g/mL.
Which of the questions below is scientific? A. What is my blood pressure right now? B. How does regular exercise affect blood pressure? C. Who invented the device used to measure blood pressure? D. Why do most pharmacies have machines that read blood pressure?
Answer:
B
Explanation:
the reason as to why B is the answer is because, the question is one that you will have to study and find more information about, while the others are simple and do not require you to go into such detail and research.
substances that are made of particles and that move in a random motion I need this nowww!!!!
Answer:
ANY KENITIC PARTICLE
Particles in both liquids and gases collectively called fluids
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what is phase change?
Explanation:
In chemistry, thermodynamics, and many other related fields, phase transitions (or phase changes) are the physical processes of transition between the basic states of matter: solid, liquid, and gas, as well as plasma in rare cases.
Answer:
In chemistry, thermodynamics, and many other related fields, phase transitions are the physical processes of transition between the basic states of matter: solid, liquid, and gas, as well as plasma in rare cases. A phase of a thermodynamic system and the states of matter have uniform physical properties.
Explanation:
How is a nuclear weapon engineered?
Answer:The first task of a nuclear weapon design is to rapidly assemble a supercritical mass of fissile uranium or plutonium. A supercritical mass is one in which the percentage of fission-produced neutrons captured by another fissile nucleus is large enough that each fission event, on average, causes more than one additional fission event. Once the critical mass is assembled, at maximum density, a burst of neutrons is supplied to start as many chain reactions as possible. Early weapons used a modulated neutron generator codenamed "Urchin" inside the pit containing polonium-210 and beryllium separated by a thin barrier. Implosion of the pit crushed the neutron generator, mixing the two metals, thereby allowing alpha particles from the polonium to interact with beryllium to produce free neutrons. In modern weapons, the neutron generator is a high-voltage vacuum tube containing a particle accelerator which bombards a deuterium/tritium-metal hydride target with deuterium and tritium ions. The resulting small-scale fusion produces neutrons at a protected location outside the physics package, from which they penetrate the pit. This method allows better control of the timing of chain reaction initiation.
Explanation:
Na3PO4+_CaCl2-->_NaCl + __Ca3(PO4)2. NEED HELP ASAP
Answer:
2Na3PO4 + 3CaCl2 → 6NaCl + Ca3(PO4)2
Select the most likely product for this reaction:
Upper K subscript 2 upper C upper O subscript 3 (a q) plus upper C upper O subscript 2 (g) right arrow question mark.
K2CO3(aq) + H2O(l)
K(s) + H2(g) + O2(g)
K(s) + CO3(g) + H2
Answer:
The answer is A- K2CO3(aq)+H2O(I)
Explanation:
The person who made this question gave the answer so...eh??
Answer:
A) K2CO3(aq) + H2O(l)
Explanation:
Lodestone is magnetic. How might you identify weather a mineral sample might be lodestone
A. By examining how it bends
B. By determining if it contracts electricity
C. By determining if it glows under ultraviolet light
D. By determining if it attracts metal objects
Answer: D
Explanation:
how is it possible for carbon to move through the biotic parts of carbon cycle
Answer:
Explanation:
Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too. Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground.
For each of the following balanced equations, calculate how many grams of each product would be produced by complete reaction of 15.0 g of the reactant
indicated in boldface. (*)
a. *2BC13(s)* + 3H2(g) -> 2B(s) + 6HCl(g)
b. *2Cu S(s)* + 302(g) → 2Cu2O(s) + 2SO2(g)
C. 2Cu2O(s) + *Cu2S(s)* -> 6Cu(s) + SO2(g)
d. CaCO3(s) + *SiO2(s)* → CaSiO3(s) + CO2(g)
Answer:
vov-nhmb-snm
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Dose hexane have charged regions?
Answer:
Hexane will not have any dipole-dipole interactions because it is a non-polar molecule
Explanation:
Explanation:
This causes regions of both of these molecules that have partial negative charges and other regions wind up with partial positive charges. Hexane will not have any dipole-dipole interactions because it is a non-polar molecule. The intermolecular forces between hexane molecules will be dispersion forces.
in the following acid-base reaction, h20 is the____ hci(g)+h2o(I) = h3o+(aq)+ci-(aq)
Answer:
B: Base
Explanation:
Correct
In acid-base reaction, h20 is the Base.
The reaction HCl(aq) + H2O(l) H3O+(aq) + Cl(aq) - HCl gives water a proton. HCl is an acid as a result. A proton is taken up by H2O from HCl. H2O is a base as a result.
Acid–base reactionIn most acid-base reactions, there will always be water and salts. For example, hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH) to form sodium chloride (NaCl) salt and water (H2O).What are bases and acids?Any hydrogen-containing material that has the ability to donate a proton (hydrogen ion) to another chemical is considered an acid. A base is a molecule or ion that can take up an acid's hydrogen ion. Typically, sour tastes help to identify acidic chemicals.Learn more about Acid–base reaction brainly.com/question/15209937
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Why does a DNA fingerprint require millions of copies of each DNA fragment
Answer:
Because it can identify a person.
A DNA fingerprint is a piece of DNA so distinct that it can prove a person's identity. These distinct areas can take on many different forms, but each form is unique to any one individual.
PCR allows the amplification of a single copy of DNA into millions of copies. However this technique requires that the DNA of interest already be of a known sequence in order to design primers that will specifically hybridize to the target DNA.
It is important as:
It's used as evidence in courts, to identify bodies, track down blood relatives, and to look for cures for disease.
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**PLEASE SHOW YOUR WORK**Calculate how much energy would be necessary to convert 250.0 grams of ice at -30°C to steam at 145°C.
Assume that the only time that liquid water changes to gas is when it is boiling. Please help me
Answer:
Q= mc∆T(ice) + mLF(ice) + mc∆T(water) + mLV(water) + mc∆T(steam)
m=250 g = 0.25 kg = ¼ kg c(ice)= 2100 J/kg.K c(water)= 4200 J/kg.K LF(ice)= 333.7 kJ/kg LV(water)= 2256 kJ/kg c(steam)= 2080 J/kg.K
Explanation:
Q= ¼ × 2100 × (0°-(-30°)) + ¼ × 333700 + ¼ × 4200 × (100°-0°) + ¼ × 2256000 + ¼ × 2080 × (145°-100°)
Q= 15750 + 83425 + 105000 + 564000 + 23400
Q= 791575 J
A sample of nitrogen occupies a volume of 3.0 L at 0 ℃ and 1.21 atm pressure. To which temperature (in ℃) should the gas be cooled in order to halve its volume while maintaining a constant pressure?
Answer:
Thegas should be cooled to -136.5°C.
Explanation:
Volume of a gas is directly proportional to its temperature on the kelvin scale. This is called Charles' law.
Initially, the gas had a volume of 3.0 L at 0°C(273 K).
We have to have the temperature at which the volume of the gas will be 1.5 L.
Let V1=3 L, T1=273 K, V2=1.5 L, T2=?
By Charles' law,
V1/T1=V2/T2
T2
=(V2×T1)/V1
=(1.5 L×273K)/3L
=136.5 K
=(136.5-273)°C
= -136.5 °C
What element is in group 4 and period 3
Earth and the Solar System: Phenomena:
Question 3
How old is our solar system?
Select one:
1. About 13.5 million years.
2. About 13.5 billion years.
3. About 4.5 million years.
4. About 4.5 billion years.
Write the chemical equation for water
Answer:
H2O
Explanation:
What is the gravitational potential energy of a 19 lbs goose flying 72 m above the earth’s surface?
Answer:
cause ree
Explanation:
hvbvnfhfjfnmsmskskakskksvdbd
A student used a sling psychrometer to measure the humidity of the air. If the relative humidity was 65% and the dry bulb temperature was 10 C, what was the dew point temperature
Answer:
3° C
Explanation:
The dew point temperature is the temperature of the air to which the air must be cooled so as to become saturated with the water vapor.
Here it is given that the relative humidity in the air, RH= is 65%
And the dry bulb temperature is T = 10° C
Therefore, the dew bulb temperature is,
[tex]$Td= T - \frac{100-RH}{5}$[/tex]
[tex]$Td= 10 - \frac{100-65}{5}$[/tex]
= 10 - 7
= 3° C
So the dew point temperature is 3° C .
How many moles of HCl are needed to react completely with 2.50 moles of Zn?
Zn+2HCI-ZnCI2+H2
Answer:Explanation:
Your tool of choice here will be the mole ratio that exists between zinc metal,
Zn
, and hydrochloric acid,
:HCl
, in the balanced chemical equation.
Zn
(s]
+
2
HCl
(aq]
→
ZnCl
2(aq]
+
H
2(g]
↑
⏐
You're dealing with a single replacement reaction in which zinc displaces the hydrogen from hydrochloric acid. The products of the reaction are aqueous zinc chloride and hydrogen gas.
Now, as you can see from the balance chemical equation, a
1
:
2
mole ratio exists between the two reactants.
This tells you that in order for the reaction to take place, you need to have twice as many moles of hydrochloric acid as you do of zinc metal.At the same time, you have a
2
:
1
mole ratio between hydrochloric acid and hydrogen gas.
This means that the reaction will always produce half as many moles of hydrogen gas as you have moles of hydrochloric acid.
Since you know that
4
moles of hydrochloric acid are taking part in the reaction, and assuming that you have enough zinc metal so that it doesn't act as a limiting reagent, you can say that the reaction will produce
4
moles HCl
⋅
1 mole H
2
2
moles HCl
=
2 moles H
2
Chlorine exists as a gas, and iodine exists as a solid at room temperature. What explains the difference in the physical states of the substances at room temperature?
The intermolecular attractions are weaker with chlorine than iodine.
The intermolecular attractions are stronger with chlorine than iodine.
Chlorine has more electrons than iodine..
Chlorine has less protons than iodine.
Answer:
The correct answer is B)The intermolecular attractions are stronger with chlorine than iodine.
Explanation:
Have a nice Day
Answer:
cfvghjnmkljhgtfaASDFGVBHNJNGFDXZVBRNHT45RFD
Explanation:
Loggerhead turtles live and migrate around the Atlantic Ocean. Which of the following is an adaptation of Loggerhead turtles? *
Use the drop down menus to answer the questions. In what type of plate boundary did subduction occur? In what type of plate boundary did new crust form? In what type of plate boundary did mountains form? In what type of plate boundary did volcanoes form? In what type of plate boundary did a river change its path? Use the drop down menus to answer the questions. In what type of plate boundary did subduction occur? In what type of plate boundary did new crust form? In what type of plate boundary did mountains form? In what type of plate boundary did volcanoes form? In what type of plate boundary did a river change its path? Use the drop down menus to answer the questions. In what type of plate boundary did subduction occur? In what type of plate boundary did new crust form? In what type of plate boundary did mountains form? In what type of plate boundary did volcanoes form? In what type of plate boundary did a river change its path?
Answer:
the answers to this is Convergent, Divergent, Convergent, Convergent, and Transform
Explanation:
i just answered it :))
In different types of plate boundaries, various geological features occur such as volcano and mountain formation.
What are plate boundaries?Plate boundaries are the areas where the edges of two tectonic plates meet.
Plate boundaries can either be divergent, convergent, or transform.
At different plate boundaries, different geological activities occur.
At convergent plate boundaries, subduction occurs.At divergent plate boundaroes, new crust forms.At convergent plate boundaries, mountains form.At convergent plate boundaries, volcanoes form. At transform plate boundaries, a river change its path.Therefore, at different types of plate boundaries, various geological features occur.
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pollutants from a factory that enter the water in a watershed will have a negative effect on which of the following
Answer:
a
Explanation:
The pollution will kill the local pond life, and amphibians are very delicate to change.
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The pollutants from a factory will have a negative effect on
a. local pond life
This effect is known as water pollution.
Effects of water pollution on local pond life:The plants go through such a lot of oxygen during the evening and during rotting processes that there is none left for the other lake life. The development additionally forestalls daylight arriving at the life forms beneath. At last, all the green growth bites the dust leaving a rancid, rotting mass.
Natural matter and supplements cause an expansion in high-impact green growth and exhaust oxygen from the water section.
Thus, correct option is a.
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What kind of reaction is 2H202 → 2H20 + O2?
O A. Decomposition
O B. Single-replacement
C. Double-replacement
O D. Synthesis
Answer:
this reaction is so the answer should be A
If a piece of paper with a mass of 1.3 grams is shredded into pieces and then it's weighed again so what would be the mass of the paper shreds?
Option 1: More than 1.3 grams
Option 2: stays the same (1.3 grams)
or
Option 3: Less than 1.3 grams
Answer:
option 2
Explanation:
what happens to water in the atmosphere after evaporation occurs
Answer:
Cloud form
Explanation:
Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor. ... Once water evaporates, it also helps form clouds.
___________________________________________________________
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In what way is heat transferred to the tubes? (Hint “touching’”)
Please help
answer:
in heat transfer, as the fluid flows along the tube, the wall layers are heated or cooled. temp. variation occurs in the wall layers.
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Electricity should cost more so that people will use less
Answer:
Electricity. GIMME BRAINLIEST (pleasee) >:)
Explanation:
Which of the following is a testable hypotheses?
Answer:
The awser is D.
