Answer:
volume of bracelet is 5cm3
mass is 0.0965Kg
Explanation:
1ml = 1cm3
1m3 = 1000000cm3
0.000005m3
Mass = volume*density
19300 Kg/m3 * 0.000005m3 = 0.0965Kg
why can three atoms of magnesium have different masses?
Answer:
Three atoms of magnesium can have different masses because each of the three atoms has a different number of neurons.
I hope this helped :)
The differences in masses of the three magnesium atom is due to there differences in there neutron number
Isotopes are members of an element that all have the same number of protons but different numbers of neutrons.
These are 2 or mores type of atoms that have the same atomic number but different nucleon numbers due to the different number of neutron in the nuclei.
The reason why three atoms of magnesium has different masses is due to Isotropy.
The differences in masses of the three magnesium atom is due to there differences in there neutron number.
The differences in masses is caused by the differences of their neutron number.
learn more about isotopy here: https://brainly.com/question/25305592?referrer=searchResults
The density of a gas is 1.26 g/L at STP. What is the mass of 1 mole? What could this gas be?
Answer: Molar mass=28.224g/mol, The gas could be Nitrogen gas
Explanation:
Density is calculated as Molar mass/ Molar Volume
Recall that
One mole of an ideal gas at (STP) standard temperature and pressure = 22.4 liters (in Volume)
Given That Density =1.26 g/L
Volume = 22.4L at STP,
Molar mass = Density x Molar Volume
= 1.26 g/L x 22.4L =28.224g
Therefore, if 1 mole of this gas has a mass of 28.224g then its molar mass is equal to 28.224g/mol
The molar mass of Nitrogen = 28.014 g/moL, so we can conclude the the gas could be Nitrogen
Please help will give brainliest
Answer:
the answer id D
Explanation:
i dont know im just living here 5
Describe the reaction of zinc with sulphuric acid
Answer:
Zinc reacts with dilute sulphuric acid to produce hydrogen gas (H2) and zinc sulphate. This is an example of displacement reaction of a non-metal by a metal. ... ZnSO4 is different in chemical composition and chemical properties than Zn and H2SO4 so it is a chemical change.
Answer:
Reaction of Zinc with Dilute Sulphuric Acid
Zinc is more reactive than hydrogen and it displaces hydrogen from dilute acids. Zinc reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas is evolved. This is a single displacement reaction of a non-metal by a metal. ... So, this reaction is a chemical change.
What mass of calcium chloride is required to prepare 3.20 L of 0.850 M of calcium chloride solution?
Answer:
301.92 g of CaCl2.
Explanation:
The following data were obtained from the question:
Volume of CaCl2 solution = 3.20 L
Molarity of CaCl2 solution = 0.850 M
Mass of CaCl2 =?
Next, we shall determine the number of mole of CaCl2 in the solution. This can be obtained as illustrated below:
Volume of CaCl2 solution = 3.20 L
Molarity of CaCl2 solution = 0.850 M
Mole of CaCl2 =?
Molarity = mole /Volume
0.850 = mole of CaCl2 /3.20
Cross multiply
Mole of CaCl2 = 0.850 × 3.20
Mole of CaCl2 = 2.72 moles
Finally, we shall determine the mass of the CaCl2 needed to prepare the solution as follow:
Mole of CaCl2 = 2.72 moles
Molar mass of CaCl2 = 40 + (2×35.5)
=40 + 71
= 111 g/mol
Mass of CaCl2 =?
Mole = mass /Molar mass
2.72 = mass of CaCl2 /111
Cross multiply
Mass of CaCl2 = 2.72 × 111
Mass of CaCl2 = 301.92 g
Therefore, 301.92 g of CaCl2 is needed to prepare the solution.
how many moles of NO are formed from 2.5 moles of NO2 if there is plenty of water present
Moles of NO formed : 0.833
Further explanationGiven
2.5 moles of NO2
Required
moles of NO formed
Solution
Reaction
3 NO₂(g) + H₂O(l) = 2 HNO₃(aq) + NO(g)
The reaction coefficient in a chemical equation shows the mole ratio of the compounds in the reactants and products
From the equation, mol ratio of NO₂ and NO = 3 : 1, so moles of NO :
[tex]\tt moles~NO=\dfrac{1}{3}\times 2.5\\\\moles~NO=0.833[/tex]
Symbol #e" Orbital diagram and electron configuration can someone help
N - 7 - 1s2 2s2 2p3
O - 16 - 1s2 2s2 2p6 3s2 3p4
Mn - 25 - 1s2 2s2 2p6 3s2 3p6 4s2 3d5
Ga - 31 - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1
about how much of the visible side of the moon is lit up during a full moon?
A. Three fourths
B. One fourth
C. None of it
D. All of it
Answer:
D
Explanation:
i learned this in elementary
Which activity is an example of chemical change?
The greater the resistance, the less current there is for a given voltage.
Please select the best answer from the choices provided
True
False
❤️❤️❤️
Answer:
The answer is True.
How does Gas Trapping bottles Monitor Volcanos?
( put in your own words don’t look up on internet )
I will give brainlst If you answer correctly.
Answer: the pressure releases gas. The two most abundant gases are sulfur dioxide and carbon dioxide, and if levels of these gases increase,
Explanation:
magnesium sulfide + nitric acid net ionic
Answer:
MgSO_3(s) + 2 HNO_3(aq) rightarrow Mg^2+(aq) + 2 NO_3^-(aq) + SO_2(g) + H_2O(l) b.
Explanation:
The balanced net ionic equation for the reaction of magnesium sulfite with nitric acid is a. MgSO_3(s) + 2 HNO_3(aq) rightarrow Mg^2+(aq) + 2 NO_3^-(aq) + SO_2(g) + H_2O(l) b.
A typical home instant pot has an internal volume of 6.5 Liters. If the steam inside an instant pot with an internal pressure of 191.0 kPa and a temperature of 750.0 K was released into the atmosphere at 101.3 kPa and 298K, what volume with the steam occupy in the atmosphere?
Which one is true? Elements in the same row have the same number of:
Explanation:
Elements in same row (i.e, from left to right) have the same number of electron shells.
Write out the electron configurations of the ions below and determine which one is listed with an incorrect charge. (the numbers and charges written after the elemental symbol should be understood as superscripts)
A. I-
B.O2+
C. Al3+
D. Mg2+
E. none of the above
Answer:
I think B. O2+
Explanation:
Answer:
B
it must be O2- not O2+, because it's an anion not a cation.
Help DUE MONDAY!!!
Dldm
Time to slide down : 2.4 s
Further explanationGiven
total length of slide = 12 m
Randy's speed = 5 m/s
Required
time to slide down
Solution
Randy's motion can be said to be a straight, regular motion at a constant speed
Can be formulated
d = v x t
d = distance, m
v = velocity, m / s
t = time, s
we plug in the known values in the formula
[tex]\tt t=\dfrac{d}{v}\\\\t=\dfrac{12~m}{5~m/s}\\\\t=2.4~s[/tex]
what is the kinetic energy of a 3kg ball that is rolling at 2 meters per second
Answer:
6 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 3 \times {2}^{2} \\ = \frac{1}{2} \times 3 \times 4 \\ = 3 \times 2[/tex]
We have the final answer as
6 JHope this helps you
The Earth's hours is it spinning on its axis, and it takes 24
Answer:
yes? is there a question...
Explanation:
Answer:
24 hours
Explanation:
Earth spins on its axis once in every 24-hour day. At Earth's equator, the speed of Earth's spin is about 1,000 miles per hour (1,600 km per hour).
Which event would most likely lead to a thunderstorm g i v i n g b r a i n l e s i t HELP
--
Answer:
A
Explanation:
hope it helps
Answer:
A
Explanation:
I got right
What is generally true of atoms with relatively large atomic radii?
Answer:
Large atoms hold their electrons very tightly. ... Large atoms tend to be found on the right side of their period on the periodic table.
Explanation:
Answer:
Explanation:
Large atoms tend to have a low ionization energy and a low electron affinity.
Help! Please! Fast! Please!
Answer:
The amplitude is higher for wave 2
Explanation:
Amplitude is the height of the wave at the greatest point
Please help Fast i dont Know
Condensation is a phase change from?
Answer:
gas to liquid
Explanation:
think of water vapor condensing on glass when you breathe on it for a while.
What ratio of concentration of ammonia and ammonium chloride should be mixed to
prepare a buffer solution of pOH 5? (Kb for NH3 =1.8 x 10-4)
The ratio of concentration of ammonia and ammonium chloride : 0.05
Further explanationGiven
pOH=5
Kb for NH3 =1.8 x 10-4
Required
The ratio of concentration of ammonia (NH₃) and ammonium chloride(NH₄Cl)
Solution
Solutions containing ammonia and its salt: ammonium chloride are called alkaline buffers
Can be formulated : ( for the same of the volume, mol=concentration)
[tex]\tt \displaystyle [OH-]=Kb\times\frac{weak\:base\:mole}{salt\:mole\times valence}[/tex]
pOH=-log [OH⁻]
pOH=5⇒[OH⁻]=10⁻⁵
Valence for NH₄Cl = 1, so the concentration ratio :
[tex]\tt 10^{-5}=1.8\times 10^{-4}\times \dfrac{[~NH_3]}{[NH_4Cl]}\\\\0.05=\dfrac{[~NH_3]}{[NH_4Cl]}[/tex]
Will give brainliest
Answer:
c. both gases have the same number of molecules
brainliest?
What is the concentration of a solution made by diluting 35 mL of 6.0 M HCl to a final volume of 750 mL?
If 2.49g of CuNO3 is dissolved in water to make O.830M solution, what is the volume of the solution in milliliters?
How many moles of NaOH are present in 13.5mL of 0.17 M NaOH?
Answer:
1. 0.28M
2. 24mL
3. 0.002295moles of NaOH.
Explanation:
1. The 6.0M HCl solution is diluted from 35mL to 750mL, that is:
750mL / 35mL = 21.43 times
The 6.0M HCl solution is diluted 21.43 times, the final concentration is:
6.0M / 21.43 = 0.28M
2. First, we need to convert grams of CuNO3 to moles and then, as molarity is moles per liter we can solve for volume of solution in liters and convert it to mililiters:
Moles CuNO3 -Molar mass 124.9g/mol:
2.49g * (1mol / 124.9g) = 0.020 moles of CuNO3
Volume is:
0.020 moles * (1L / 0.830mol) = 0.0240L * (1000mL / 1L) = 24mL
3. In 13.5mL = 0.0135L of 0.17M NaOH the moles are:
0.0135L * (0.17mol / L) = 0.002295moles of NaOH
How many moles are in 11.0 grams of methane (CH4)?
When solid S1 is heated, it breaks up into gas G and another solid S2. The solids S1 and S2 and the gas G are all pure substances. On the basis of this information alone, which substance or substances must be compounds? A.S1 only B.S2 only C.S1 and S2 D.S1 and G
Answer:
A.S1 only
Explanation:
A compound is one of the pure substances (other being element) that forms when two or more atoms of an element are chemically combined. According to this question, a solid S1 is heated and it breaks up into gas G and another solid S2 as follows:
S1 (s) ➡ G (g) + S2 (s)
Based on the information in the questio, the solids S1, S2 and the gas G are all pure substances. However, since solid S1 broke down into two other pure substances, it means solid S1 is originally a chemical combination of both products, which denotes a COMPOUND. Note that Gas G and Solid S2 are most likely elements.
What is the mass, in grams, of 50.0L of N2 at STP?
Hey there!:
Molar mass N₂ = 28.0134 g/mol
28.0134 g ------------------- 22.4 L (at STP )
mass N₂ -------------------- 50.0 L
mass N₂ = 50.0 x 28.0134 / 22.4
mass N₂ = 1400.67 / 22.4
mass N₂ = 62.529 g
Hope this helps!
Describe the characteristics
of the different sections
(families) of the periodic
table
Answer: The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods