Answer:
b
Explanation:
What affects wind speed?
Answer:
At the Earth's surface, wind blows horizontally from high pressure to low pressure areas. The speed is determined by the rate of air pressure change, or gradient, between the two pressure areas. The greater the pressure difference, the faster the winds.
- sciencing
The Four Forces That Influence Wind Speed & Wind Direction
Explanation:
what is the volume of 5 moles of oxygen gas at rtp
Answer:
5 moles of oxygen occupy 120 dm³ volume.
Explanation:
Given data:
Number of moles = 5 mol
Volume of gas = ?
Solution:
In question it is given gas is at room temperature and pressure.
One mole of any gas at room room temperature and pressure occupy volume of 24 dm³. Thus,
5 mole of gas occupy volume of,
5 mol × 24 dm³/1 mol
120 dm³
5 moles of oxygen occupy 120 dm³ volume.
Where is type of precipitation is most likely to form during a thunderstorm
Answer:
hail, btw have a nice day
Answer:
Hail
Explanation:
I got it right on my test
Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases,x and y.it was not possible to break down the gasses x and y into simpler particles.which statement is best supported by this evidence.
a.the gas y is a water vapor.
b.water is an element.
c.the gases x and y are compounds.
d.the gases x and y are elements
Answer:
d.the gases x and y are elements
Explanation:
Since it is impossible to further break down the gases produced during this electrolytic process, we can conclude that the gases x and y are elements.
An element is a distinct substance that cannot be split up into simpler substances. Such substances are made up of only one kind of atom.
It is impossible through chemical reactions split an element into simpler units.
What is the definition of a community in environmental science
The density of ice at its freezing point is 0.917 g/cm3. What is the mass of 2.5 cm3 of ice at this temperature?
A. 1.6 g
B. 2.3 g
C.2.7 g
D.3.4 g
Answer:
The answer is option BExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 0.917 × 2.5 = 2.2925
We have the final answer as
2.3 gHope this helps you
Answer:. 2.3 g
Explanation:
When mixing an acid with water, which of the following must always be done?
A.
Never mix an acid with water, it will explode.
B.
Always add the acid to the water slowly, taking a moment to stir between drops.
C.
Always heat the acid before mixing with water.
D.
Always shake both solutions before mixing.
Answer:
B
Explanation:
Answer:
B. Always add the acid to the water slowly, taking a moment to stir between drops
what element has an electron configuration of 2-1:
Answer:
Lithium
Explanation:
The element with electronic configuration of 2, 1 is helium.
In the electronic configuration, we are able to know that the total number of electrons the atom contains is 3. Also, the element has one electron in the outer most shell.
Elements with one valence electrons are the alkali metals.
Therefore, this configuration clearly matches Lithium.
A student used the Dumas method to determine the molar mass of a volatile material. They placed the container into the ice bath BEFORE all of the material was vaporized. What will happen to their final calculations?
A. The Molar Mass will be too low.
B. The Molar Mass will not be effected.
C. The Molar Mass will be too high.
Answer: the molar mass will be too high
Explanation:
Most thermal conductors are made of which material?
Answer:
copper
Explanation:
Answer:
metal
Explanation:
A neutral atom of gold has the same number of electrons and what?
Ming has two unknown substances. One is nonpolar, and the other is polar.
Which process would most likely help Ming identify which substance is polar and which is nonpolar?
Test the boiling points. The polar substance should have a lower boiling point because of its dipole-dipole forces.
Test for an odor. The nonpolar substance should have a higher volatility and stronger odor because of its London dispersion forces.
Test the boiling points. The nonpolar substance should have a higher boiling point because of its hydrogen bonds.
Test for an odor. The polar substance should have a higher volatility and weaker odor because of its dipole-dipole forces.
Answer:
Test for an odor. The nonpolar substance should have a higher volatility and stronger odor because of its London dispersion forces.
Explanation:
To help Ming identify the non-polar compound, assuming the non-polar compound will have an odor test for it and most importantly, the non-polar substance should have a higher volatility due to its London dispersion forces.
London dispersion forces are weak attractions found between non-polar molecules and noble gases. They account for the reason why compounds as such are volatileAnswer:
B
Explanation:
I need your help please answer ASAP
Atoms of a given elements with have the same mass true or false?
Answer: True
Explanation:
What is the independent variable when testing to see how the viscosity of a liquid affects its flow rate
Answer:
Viscosity
Explanation:
The viscosity of the liquid is the independent variable. The flow rate is the dependent variable in this hypothesis.
The statement given is called the hypothesis. It is a form of scientific guess into a phenomenon.
An independent variable is the cause. A dependent variable is the effect produced. In this hypothesis, the cause of the various flow rate of the liquid is the viscosity. It is therefore the independent variable. The flow rate is the dependent variable.What element has the following electron configuration? 1s 22s 22p 63s 23p 64s 2
Answer:
answer is D
Explanation:
first to answer correctly gets 10 pts plus brainleist! (must answer correcty tho)
Answer:
Explanation:
sorry dont understand
Answer: D. The speed of rotation of the Earth on its axis
Explanation: How fast Earth spins determines the number of hours in a given day.
Help meee, if u help me i give u a pizza :)
Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is radioactive, with a half-life of 28.1 yr. Calculate how long it will take for 0.900 g of the isotope to be reduced to 0.170 g by decay.
Answer:
67.6 years is the time the isotope take to decay from 0.900g to 0.170g
Explanation:
The radioactive decay follows first order law:
Ln [A] = -kt + ln[A]₀
Where [A] is concentration after time t,
k is decay constant:
k = ln 2 / t(1/2)
k = ln2 / 28.1 years
k = 0.02467 years⁻¹
[A]₀ = Initial concentration.
We can replace concentration and use the mass of the isotope:
Ln [A] = -kt + ln[A]₀
Ln [0.170g] = -0.02467 years⁻¹t + ln[0.900g]
-1.667 = -0.02467 years⁻¹t
t =
67.6 years is the time the isotope take to decay from 0.900g to 0.170gThe time required for the sample to reduce to 0.170 grams has been 67.75 years.
Half-life can be defined as the times required by the substance to reduce to half of its initial concentration.
The half-life can be expressed as:
Amount left = Initial amount [tex]\times[/tex] [tex]\rm \dfrac{1}{2}^\dfrac{time}{Half-life}[/tex]
From the given:
0.17 g = 0.9 [tex]\rm \times\;\dfrac{1}{2}^\dfrac{t}{28.1}[/tex]
[tex]\rm \dfrac{0.17}{0.9}[/tex] = [tex]\rm \dfrac{1}{2}^\dfrac{t}{28.1}[/tex]
0.188 = [tex]\rm (0.5)^\dfrac{t}{28.1}[/tex]
Taking log on both the sides,
log 0.188 = [tex]\rm \dfrac{t}{28.1}\;\times[/tex] log 0.5
2.411 = [tex]\rm\dfrac{t}{28.1}[/tex]
t = 2.411 [tex]\times[/tex] 28.1 years
Time = 67.75 years.
The time required for the sample to reduce to 0.170 grams has been 67.75 years.
For more information about half-life, refer to the link:
https://brainly.com/question/24710827
Which of the following claims about a binary compound composed of elements with the same electronegativity is most likely to be true?
A
Tully compound has properties similar to those of both elements.
The bonding in the compound is nonpolar covalent.
с
The boiling point of the compound is above 1000°C.
D
The compound contains strong ionic bonds.
I think it's D
Hope that helps
Answer: B, the bonding in the compound is nonpolar covalent.
Explanation:
This is because with the same electronegativity, there is an equal sharing of electrons, which indicates that the bonding must be nonpolar.
Properties of lonic compounds are_____
at room temperature.
A list of scenarios is shown below.
I. Water is running
II. A car is parked on a hill
III. One liter of gasoline sits on a bench
Which of the scenarios has kinetic energy?
A
1, only
В.
II, only
с
II and III, only
D
I and III, only
Please help
Answer:
A
Explanation:
A: because for something to have kinetic energy it has to be in motion, the other 2 scenarios are not moving.
Question 2 (1 point) The chemical formula for an ionic compound represents the a b number of ions in each molecule. total number of ions in the crystal lattice. number of atoms in each molecule simplest ratio of ions that results in an electrically neutral compound.
The chemical formula for an ionic compound represents the simplest ratio of ions that results in an electrically neutral compound. That is option D.
What is an ionic chemical compound?An ionic chemical compound is defined as the type of chemical compound that contains both the oppositely-charged ions of a metal and a nonmetal are attracted reacting with each other to form an ionic bond.
When represented as a chemical formula, it is the simplest ratio of ions that results in an electrically neutral compound.
Learn more about ionic compound here:
https://brainly.com/question/28851190
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PLEASE HELP!!!!!!
How would you modify the flashlight to increase the amount of energy it releases
Answer:
add a major conductor
Explanation:
7. Aluminum, iron, copper, and oxygen are all examples of which of the following?
Answer:
Explanation:
Elements
A student with a body temperature of 37°C holds a piece of ice that has a temperature of –8°C.
Which statement best explains what happens?
A.Heat transfers coldness from the ice to the student's hand. B.Heat transfers thermal energy from the student's hand to the ice. C.Thermal energy transfers heat from the student's hand to the ice. D.Thermal energy transfers coldness from the student's hand to the ice.
plzz hurry
Answer:
B
Explanation:
Heat moves as thermal energy from hot body to a cold body
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Marissa blows up balloons for a party. She decides how big or small to make each balloon. Why does the air she blows into each balloon take up all the space inside the balloon
When an object resist movement by a force
Answer: Inertia
Explanation:
How do desalination plants work?
Answer:
Hope this will help..........
Explanation:
Seawater desalination is the removal of salt and impurities from seawater to produce fresh water. Our desalination plants use a reverse osmosis process. ... The filtered seawater is then forced under pressure through special membranes whereby the osmosis process that normally occurs in nature is reversed
Which one will diffuse faster Ammonia or carbon dioxide Why?
jcp-fnoa-kzk join here