Answer:
A covalent bond
hope this helps!
Jacob walked into a shop to buy cups for his house. He saw the cups shown below. Why does the cup on the right appear yellow? A. The cup absorbs yellow light but reflects all other colors of light. B. The cup reflects yellow light but refracts all other colors of light. C. The cup refracts yellow light but absorbs all other colors of light. D. The cup reflects yellow light but absorbs all other colors of light.
Answer:
D. The cup reflects yellow light but absorbs all other colors of light.
Explanation:
The cup in the shop appears yellow because the cup reflects yellow light but absorbs all colors of light.
Due to the materials the cup is made of, it is able to specifically reflect yellow and absorb other radiation types.
The color we see are products of the part of visible radiations they reflect.
The cup in this instance reflects yellow and absorbs other color.
protons are one of the heavier pieces of an atom. true or false?
Answer:
true
Explanation:
is pH 6 a weak or strong acid?
Answer:
6 pH is a weak acid
Explanation:
Generally, a strong acid has a pH of about zero to 3.
The pH scale typically ranges from 1 to 14, with lower numbers representing acids, higher numbers, bases. Neutral liquids like water have a pH of 7.
(Please heart the answer if you find it helpful, it's a motivation for me to help more people)
1. Ammonia gas occupies a volume of 450. ml at a pressure of 720, mm Hg. What
volume will it occupy at standard pressure?
Answer:
720+450 = 1170 it's 1170
426.32mL (rounded)
The formula for finding V2 is P1 • V1/P2 and since standard pressure (1atm) is equal to 760 P2 would be 760.
720mmHg • (450mL/760mmHg) = 426.32mL
How many milliliters does 80 g of a 2 g/mL density liquid take up?
Answer:
40mL
Explanation:
Given parameters:
Mass of liquid = 80g
Density = 2g/mL
Unknown:
Volume of the liquid = ?
Solution:
Density of a substance is its mass per unit volume.
It is expressed as:
Density = [tex]\frac{mass}{volume}[/tex]
Volume = [tex]\frac{mass}{density }[/tex]
So;
Volume = [tex]\frac{80}{2}[/tex] = 40mL
HELPPPP DUE NOWWW (5)
Answer:
All the answers you chose are correct
Explanation:
Answer:
I cant see the fist question but all that you chose are correct
Explanation:
How many molecules are in 10 moles of H2
The number of molecules in one mole of hydrogen gas is 6.02 × 10²³ . The number of molecules in 10 moles of hydrogen gas is then 6.022 ×10²⁴.
What is one mole?Any substance that contains 6.022 × 10²³ number of atoms is called ne mole of that substance. This number is called Avogadro number. Hence, one mole of every elements contains Avogadro number of atoms.
Hydrogen is the first element in periodic table. It is an alkali metal. The number of molecules in one mole of H₂ is equal to Avogadro number. Mass of a molecule with one mole of amount is called its molecular mass.
Number of molecules of H₂ in one mole = 6.02 × 10²³
Then number of molecules in 10 moles is Avogadro number times the number of moles.
= 10 × 6.022 × 10²³ = 6.022 ×10²⁴ molecules
Therefore, 10 moles of H₂ contains 6.022 ×10²⁴molecules..
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How many moles are 3.21x10^28 moles of N2
Answer:
number of moles =
[tex]53.3 \times 10 {}^{3} mol[/tex]
Explanation:
here's the solution in attachment.
True/False: There are about 400 known elements
Answer: false
Explanation:
there are no more then 112 known elements.
Answer:
false
Explanation:
their are only 118 element
A student dissolves 8.00 g of NH4NO3(s) in 100. g of H2O(l) in a coffee-cup calorimeter. Based on the initial and final temperatures of the mixture in degrees Celsius shown in the diagram above the laboratory setup, what is the calculated ΔT of the water reported to the appropriate number of significant figures?
3. Iron + copper sulphate
Will it react
Answer: Iron displaces copper ions from an aqueous solution of copper sulphate. ... In this reaction, metallic iron is converted into ferrous ion (Fe2+) and cupric ion (Cu2 +) is converted into metallic copper. Fe (s) + Cu2 + (aq) —→ Fe2+ (aq) + Cu (s).
Explanation:
how many atoms are in 7.00 mol of potassium
Answer:
7 mole to atom = 4.21549905E+24 atom
Explanation:
1 mole to atom = 6.0221415E+23 atom
2 mole to atom = 1.2044283E+24 atom
3 mole to atom = 1.80664245E+24 atom
4 mole to atom = 2.4088566E+24 atom
5 mole to atom = 3.01107075E+24 atom
6 mole to atom = 3.6132849E+24 atom
7 mole to atom = 4.21549905E+24 atom
8 mole to atom = 4.8177132E+24 atom
9 mole to atom = 5.41992735E+24 atom
10 mole to atom = 6.0221415E+24 atom
Scientists say that the solar system formed from______.
Answer:
a rotating disk of dust and gases
Explanation:
brainliest?
Answer: scientists believe that the solar system was formed when a cloud of gas and dust in space was disturbed, maybe by the explosion of a nearby star (called a supernova). ... Squeezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebula.
Explanation:
A student rings a brass bell with a frequency of 300 Hz. The sound wave
travels through brass, air, and glass. What is the wavelength of the wave in
brass?
Medium
Wave speed
(m/s)
Brass
4,700
Air
346
Glass
5,640
A. 0.64 m
B. 1.6 m
C. 0.064 m
D. 16 m
The wavelength of the wave in brass medium, given that the wave has a frequency of 300 Hz is 16 m (Option D)
How do I determine the wavelength in brass?The wavelength of a wave is defined according to the following formula:
Velocity (v) = wavelength (λ) × frequency (f)
Divide both sides by frequency
Wavelength (λ = Velocity (v) / frequency (f)
With the above formula, we can obtain the wavelength of the wave in the brass medium. Details below:
Frequency (f) = 300 HzWave speed in brass (v) of = 4700 m/sWavelength in brass (λ) = ?Wavelength (λ = Velocity (v) / frequency (f)
Wavelength in brass = 4700 m/s / 300 Hz
Wavelength in brass= 16 m
Thus, we can conclude that the wavelength is 16 m (Option D)
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6CO2 + 6H20 + Energy
Co H1206 + 602
D. heat of reaction
O C. thermal reaction
B. endothermic reaction
A. exothermic reaction
Why is it important to know the temperature of the water when dealing with ions in
an aqueous solution?
Water does not ionize at higher temperatures.
Water becomes very acidic when at low temperatures.
Temperature affects the concentration of water.
The ionization constant of water is usually given at 25 °C.
Water at a higher temperature will produce more ions than water at a lower temperature.
Answer:
temperature affects the concentration of water
what is haber's process?
Answer:
method for procuring ammonia
Explanation:
In the Haber process, atmospheric nitrogen is converted to ammonia by reacting it with hydrogen (H2)
how many atoms are in 7.3 moles of arsenic atoms? 1 mol = 6.02 x 10^23 particles
Answer:
6,9
Explanation:
_____ is responsible for bringing gravity into modern science.
Isaac Newton
Galileo Galilei
Albert Einstein
Give 2 reasons why is copper used for electrial wires
Answer:
Copper electrical wires are safer to use than wires made of most other conductive metals because they are resistant to heat. As you can see, copper is the preferred metal for electrical wires for several reasons. It has high electrical conductive; it's inexpensive; it's ductile; and it's thermal resistant.
Write chemical name ofNH4Cl, Na2CO3.
Answer:
NH4CI
AMMONIUM CHLORIDE
NA2CO3
SODIUM CARBONATE
PLEASE HELP I don’t know how to do this
Moles of Iron : 1.01
Further explanationGiven
Reaction
Fe2O3 + 3CO → 2Fe + 3CO2
34 liters of CO
Required
moles of Iron
Solution
Assumed at STP
Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.
so for 34 L :
= 34 : 22.4
= 1.518 moles
From the equation, mol Fe :
= 2/3 x moles CO
= 2/3 x 1.518
= 1.01 moles
research ocean currents and how they relate to heat transfer.
Answer:
The movement of this heat through local and global ocean currents affects the regulation of local weather conditions and temperature extremes, stabilization of global climate patterns, cycling of gases
⚠️⚠️PLEASE HELPP⚠️⚠️
Describe an every day example of an object that has energy of motion and object that has stored energy
Answer:
Humans
Explanation:
Humans have energy of motion and store energy.
Every object will have any form of energy. For instance, when we are walking we gains a kinetic energy. We use electronic devices where electrical energy is stored and can be converted to mechanical energy to activate any motors.
What is energy transformation?Energy can neither be created nor be destroyed. However it can be transformed to any other forms. Thus, the total energy will conserved always.
We have a lot of example for energy transformation and storage. The energy form stored by virtue of the position of an object is called potential energy. Whereas, when the object starts moving potential energy converts to kinetic energy.
Thus, thermal vibrations of particles, our every day activities all are associated with a kinetic energy. Kinetic energy of each body depends on the mass and velocity of the body. The more the mass and velocity more will be the kinetic energy.
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Help please!! I'll name you brainliest!!
the answers is cacih2
wjdgagqjdhdgahahdhvddvvsvshsd
Please help I will give brainliest
Answer:
Explanation:
c. - vaccine
b. - immunity
d. - phagocyte
f. - b cell
e. - t cells
a. active immunity
If you are cooking bread, and you weigh the dough before baking and weigh the bread after baking, but they weigh 2 different amounts, how is the law of conservation of mass still being followed?
Answer:
jayfeather friend me
Explanation:
In a toasty kitchen, your dough may proof in as little as an hour (or less!). When the temperatures dip, it can take much longer—upwards of two or even three hours.
whoever answers first ill give brainliest! ANSWER QUICK PLS
Mr. B weighs out 22.8 grams of cobalt (II) chloride, then dissolves that CoCl2 in 500 mL of water. What is the concentration of his cobalt (II) chloride solution?
a. 3.51 M CoCl2
b. 0.351 M CoCl2
c. 0.176 M CoCl2
d. 0.0456 M CCl2
thank you so much!
Answer: b
Explanation: had the same question
HELP HELP HELP HELP HELP
In order to properly measure the displacement, the object must be completely submerged, however in the diagram the wood is floating. So the measured displacement will only be a fraction of what it actually is.
Science is the process of observing and making sense of the natural world.
True or False