Answer:
Technology makes space travel possible.
Explanation:
bc the guy above me is wrong I had to guess and I got it right
Answer:
Technology makes space travel possible.
Explanation:
got it right on edge
1.2 dkg to grams now I have to say extra stuff for it to submit
Answer:
12 grams and I have to write something longer so just ignore this
Calculate the volume, at STP, of a 0.950 g sample of Carbon Monoxide gas, CO.
Answer:
0.76L is the pressure of CO at STP
Explanation:
To solve this question we must use combined gas law:
PV = nRT
Where P is the pressure of the gas (1atm at STP)
V is volume (Our incognite)
n are moles of the gas (0.950g * (1mol/28g) = 0.034 moles
R is gas constant (0.082atmL/molK)
T is absolute temperature (273.15K at STP)
V = nRT/P
V = 0.034mol*0.082atmL/molK*273.15K / 1atm
V = 0.76L is the pressure of CO at STP
What is the name of the ionic compound with the formula:
AlF3
Answer:
potassium chloride.
Which of the following elements is used by your body? A) aluminum B) helium C) calcium D) all of the above
what do igneous rocks become when they break down and settle into layers?
Answer:
Sedimentary rocks
Explanation:
Igneous rocks will become sedimentary rocks when they break down and settle into layers .
Igneous rocks are rocks that are formed by the cooling and solidification of magma within or on the earth crust.
When agents of weathering and denudation forces acts on a rock body, they break them down producing sediments in the process.
Sediments are transported into depositional basins where they are laid down and cemented together. This in turn forms sedimentary rocks. The break down and settling of sediments leads to the formation of sedimentary rocks.To locate objects in their environments, bats in flight and porpoises under water both use ultrasound waves with frequencies that are beyond human hearing. These animals produce an ultrasonic wave and then detect echoes from nearby objects in order to determine the location of the object Porpoise Bat If a porpoise and a bat both produce ultrasonic waves when they are 16 meters from an object, which animal would hear its echo first? The bat would hear its echo first because sound travels faster in air than in water. O The porpoise would hear its echo first because sound travels faster in water than in air. O The bat would hear its echo first because the frequency of sound waves is greater in air than in water 0 The porpoise would hear its echo first because the frequency of sound waves is greater in water than in air.
Answer: The porpoise would hear its echo first because sound travels faster in the water than in air.
Explanation:
Calculate the pH of the following?
a) 0.12 M NaNO2
b) 0.10 M CH3NH3Cl
c) .45 M NaOCl?
Help me with this pls
A 13.9 - g piece of metal ( specific heat capacity is 0.449 /g^ C)who whose temperature is 54.2 degrees * C was added to a sample of water at 13.4 degrees * C in a constant - pressure calorimeter of negligible heat capacity . If the final temperature of the water is 15.6 °C, calculate the mass of the water in the calorimeter .
Answer:
26.2g = Mass of water in the calorimeter
Explanation:
The heat absorbed for the water is equal to the heat released for the metal. Based on the equation:
Q = m*C*ΔT
Where Q is heat, m is the mass of the sample, C is specific heat of the material and ΔT is change in temperature
Replacing we can write:
[tex]m_{metal}*C_{metal}*dT_{metal}=m_{water}*C_{water}*dT_{water}[/tex]
13.9g * 0.449J/g°C * (54.2°C-15.6°C) = m(H₂O) * 4.184J/g°C * (15.6°C-13.4°C)
240.9J = m(H₂O) * 9.2J/g
26.2g = Mass of water in the calorimeterIron sulfide is a compound. It is made by heating a mixture of iron and sulfur.
Describe and explain the differences between iron sulfide and a mixture of iron and sulfur.
Answer:
Here are some of the differences between a mixture of iron and sulfur, and iron sulfide: the mixture can contain more or less iron, but iron sulfide always contains equal amounts of iron and sulfur. the iron and sulfur atoms are not joined together in the mixture, but they are joined together in iron sulfide.
Explanation:
What is the charge for the cation in MnS2
if you had a block square that weighed 5.00 grams what would be the length of each side
Answer:
[tex]l = 0.793[/tex] cm
Explanation:
Let us assume the density of block square [tex]10[/tex] g/cm³
As we know
Volume = [tex]\frac{Mass}{Density}[/tex]
Thus Volume of this block is equal to [tex]\frac{5}{10} = 0.5[/tex]
As we know volume of square block of side of length "l" is equal to [tex]l^3[/tex]
[tex]l^3 = 0.5[/tex]
[tex]l = 0.793[/tex] cm
Calculate the mass of 4 moles of CuCl2.
Which best describes the effect of a ecosystem when populations of white-tailed deer are overhunted by people in an area?
A. It disrupts the balance between predators and prey
B. It decreases the amount of producers
C. It directly increases the population of decomposers
D. It decreases competition for food among carnivores
Answer:
A. It disrupts the balance between predators and prey
Explanation:
The effect on the ecosystem when populations of white - tailed deer are overhunted is that it disrupts the balance between predators and prey within the ecosystem.
The whited - tailed deer is the usually the prey. The carnivores are the cats and other flesh eating animals. When the deer is over-hunted, there are more predators compared to prey. This leads to a serious imbalance and a high level of competition for the scarce prey.
A metal can form
A.
a stable nucleus
B.
an anion
C.
a new family
D.
a cation
Can anyone explain and answer?
Which physical change are both exothermic
A)condensation and evaporation
B)evaporation and melting
C)freezing and condensation
D)melting and freezing
Answer:
I would say C.)
Explanation:
Freezing and condensation are both ways that heat is let out from an object.
1. How many molecules are in 643.21 grams of
Mg3(PO4)22
2. How much space (Liters) does 4.061 x 10-24
molecules of H202 take up?
3. How many H20 atoms are in 479.3 grams of
H20 gas?
4. How many grams does 80.34 L of Ca(NO3)2
weigh?
5. How many Liters of space does 893.7 grams
of CO2 take up?
643.21g
1mol
10423
262.82g
6. How many grams are in 5139 x10425
molecules of AlOH)3
1
4.061x10^24
1 mol
Answer: Calculate the molar mass of Mg3(PO4)2 in grams per mole or search for a chemical formula or substance.
Missing: 643.21 Must include: 643.21. A balloon is filled with 36.2 liters of Cl2 gas at STP. How many moles of chlorine gas are inside? Solution: 36.2
Missing: 4.061 Must include: 4.061 .For H2O, there is one atom of oxygen and two atoms of hydrogen. A molecule can be made of only one type of atom. In its stable molecular form, oxygen exists as two atoms and is written O2. to distinguish it from an atom of oxygen molecule of three oxygen atoms, in grams per mole or search for a chemical ... Did you mean to find the molecular weight of one of these similar formulas- 80.34.
Explanation: PLEASE MARK ME AS BRAINLIEST!
HELP ME!!
If a water molecule (H20) has two hydrogen atoms and one oxygen atom, how would you describe the make-up of a carbon dioxide molecule (C02)?
1 carbon atom, 1 oxygen atom
1 carbon atom, 2 oxygen atoms
2 carbon atoms, 2 oxygen atoms
2 carbon atoms, 1 oxygen atom
Answer:
2
Explanation:
Mendeleev's proposal of periodic table was based on:
The proposal of the periodic table was based upon properties that appeared with some regularity by laying out the elements from lightest to heaviest.
[hope this is helpful!:))]
What are two sources of phosphorous?
A. stratosphere
B. Erosion
C. Cows
D. Fossil fuels
E. Fertilizer
Answer:
A. stratosphere
E. Fertilizer
Explanation:
pls do this and don't just do it for the points pls help me I need it
Answer:
what do you want me to do my friend my best friend who is a dreamer
Fe0 + 2H+1 Cl-1 → Fe+2 Cl2 -1 + H20 ↑
De acuerdo con la ecuación planteada si se cambia el hierro Fe por dos moles de sodio Na0 probablemente formará
A. 2NaCl + H2
B. NaCl + H2
C. 2NaH + Cl2
D. NaCl2 + H2
Answer:
A and the answer if we can manage by its formula NaCl H2 but the answer is A
Osmium metal, the densest element, has a density of 22.6 g/mL, while hydrogen, the least dense element, has a density of 8.99 e-5 g/mL. Calculate the volume occupied by 1.00 g of each element. How many times more dense is osmium than hydrogen?
Answer:
1. Volume of osmium = 0.044 mL
2. Volume of Hydrogen = 11123.47 mL
3. Osmium is 251390 times denser than hydrogen
Explanation:
From the question given above, the following data were obtained:
Density of osmium = 22.6 g/mL
Density of Hydrogen = 8.99×10¯⁵ g/mL
Mass of osmium = 1 g
Mass of Hydrogen = 1 g
1. Determination of the Volume of osmium.
Density of osmium = 22.6 g/mL
Mass of osmium = 1 g
Volume of osmium =?
Density = mass /volume
22.6 = 1 / volume
Cross multiply
22.6 × volume = 1
Divide both side by 22.6
Volume = 1 / 22.6
Volume of osmium = 0.044 mL
2. Determination of the Volume of Hydrogen.
Density of osmium = 8.99×10¯⁵ g/mL
Mass of osmium = 1 g
Volume of osmium =?
Density = mass /volume
8.99×10¯⁵ = 1 / volume
Cross multiply
8.99×10¯⁵ × volume = 1
Divide both side by 8.99×10¯⁵
Volume = 1 / 8.99×10¯⁵
Volume of Hydrogen = 11123.47 mL
3. Determination of the number of times osmium is denser than hydrogen.
Density of osmium (Dₒ) = 22.6 g/mL
Density of Hydrogen (Dₕ) = 8.99×10¯⁵ g/mL
Dₒ / Dₕ = 22.6 / 8.99×10¯⁵
Dₒ / Dₕ = 251390
Cross multiply
Dₒ = 251390 × Dₕ
Thus, osmium is 251390 times denser than hydrogen.
Identify processes that change matter to a liquid state
Q1; ___________ have almost half a set of electrons in the outer most energy level.
1- metalloids
2- metals
3- nonmetals
Q2;________ are known to be gasses at room temperature.
1- nonmetals
2- metalloids
3- metals
Answer:
2 metalliods....
1 metals
PLEASE HURRY
Which of the following is a subsurface event that takes place during the rock cycle?
Deposition
Erosion
Weathering
Plate tectonics
Answer:
Option D, Plate Tectonics
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
Explanation:
Answer:
Option D, Plate Tectonics
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
Explanation:
Option D, Plate Tectonics
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
Visible light is a part of what spectrum
Answer:
Visible Spectrum/Electromagnetic spectrum
Explanation:
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
For species that reproduce asexually, all their offspring are
A. genetically identical
B. genetically different
C. almost identical
D. slightly different
Answer:
A. genetically identical
Explanation:
Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent. A single individual can produce offspring asexually and large numbers of offspring can be produced quickly
All the offspring that are produced in the process are genetically identical.
When we talk about this mode of reproduction, we talk about a mode of reproduction in which an organism reproduces without the fusion of gametes. This occurs essentially by cell division.
When this occur, there is no crossing of genetic material as such, all the offspring that are produced in the process are genetically identical.
Learn more about reproduction:https://brainly.com/question/1301963
What is the charge of an electron?
What element has an energy level Electron Configuration of 2-8-18-8?
Argon
Calcium
Krypton
Chlorine
answer:
krypton.
explanation:
it is a noble gas, so has full-valence shell. also, reference back to the periodic table.
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