Answer:
10°C
Explanation:
Here the problem deals with the relationship between the amount of heat lost and the temperature change of a body.
From the relationship below:
H = m C Δt
H is the quantity of heat
m is the mass
C is the specific heat
Δt is the change in heat
We can see that the quantity of heat is directly proportional to the Δt, so as more heat changes occur, so also is the value of Δt .
What mass of aluminum is needed to produce 0.500 mole of aluminum chloride?
Answer: " 13.5 g Al " ;
→ that is: "13.5 grams of aluminum."
____________________________
Explanation:
____________________________
Note: What is missing from the question is the "balanced chemical equation" for the "chemical reaction" that contains:
The reactants: "aluminum (Al) " ; and "chlorine (Cl) " ; and:
The product: "aluminum choloride (AlCl₃) " .
____________________________
The "balanced chemical equation" is:
____________________________
2 Al + 3 Cl₂ → 2 AlCl₃ ;
_____________________________
Note: The molecular weight of "aluminum (Al)" is: " 26.98 g /mol " .
____________________________
So: We call solve using a technique known as: "dimensional analysis" :
____________________________
0.500 mol AlCl₃ * [tex](\frac{2mol Al}{2mol AlCl_{3} }) * (\frac{26.98g Al}{1 mol Al}) = ?[/tex]
____________________________
Note: The units of "mol AlCl₃" cancel out to "1' ; and:
The units of "mol Al" cancel out to "1" ; and we are left with:
____________________________
" [tex]\frac{(0.500 * 2 * 26.98)}{2}[/tex] g Al ["grams of aluminum"] ;
____________________________
Note: We can "cancel out the "2's" ; since "2/2 = 1 " ; and we have:
→ (0.500 * 26.98) g Al ;
= 13.49 g Al ;
→ Round to 3 (Three) significant figures;
→ Since: "0.500" has 3 (Three) significant figures:
____________________________
= 13.5 g Al ; that is: "13.5 grams of aluminum."
____________________________
Hope this is helpful!
Best wishes to you in your academic pursuits—and within the "Brainly" community!
____________________________
0.385g of 17Cl is how many atoms?
Answer:
(Click here to get an answer to your question ✍️ 0.385g of 17Cl is how many atoms?).
Explanation:
Summarize the arguments both for and against allowing genetically altered meats into the United States.
Can u please help!?
:⊃
Answer:Through "gene escape" they can pass on to other members of the same species and perhaps other species. Genes introduced in GMOs are no exception, and interactions might occur at gene, cell, plant and ecosystem level. Problems could result if, for example, herbicide-resistance genes got into weeds. So far, research on this is inconclusive, with scientists divided - often bitterly. But there is scientific consensus that once widely released, recalling transgenes or foreign DNA sequences, whose safety is still subject to scientific debate, will not be feasible.
Explanation: i don't really know, don't come at me please
As stars get older, before they collapse, they throw off dust, heavy atoms and other materials an form a new
A. Constellation
B. Star
C. Rain cloud
D. Nebula
Answer:
B or D
Explanation:
.....I'm pretty sure I earned on some kids tv show
!!!!!PLZZZZ HELP!!!!! I'LL GIVE YOU 5 STARS AND A LIKE AND I'LL GIVE YOU POINTS JUST HELP ME ANSWER
Moles|Grams|Liters
1.2 mol N2=__ L
3 mol H2=__ L
0.5 mol CO2=__ L
10.3 L NO2=__ moles
67.2 L SO2=__ moles
89.6 L NO=__ moles
44.8 L NO2=__ grams
201.6 L H2=__ grams
65 grams CO=__ L
152 grams F2=__ L
Answer:
1.2 mol N2 = 26.88 L
3 mol H2 = 67.2 L
0.5 mol CO2 = 11.2 L
10.3 L NO2 = 0.46 moles
67.2 L SO2 = 67.2 / 22.4 = 3 moles
89.6 L NO = 89.6 /22.4 = 4 moles
44.8 L NO2 = 92 grams
201.6 L H2 = 18 g
65 grams CO = 51.9 L
152 grams F2 = 89.6 L
Explanation:
1 mole of a gas occupies a volume of 22.4 L
(N = 14, O = 16, C = 12, H = 1, F = 19)
1.2 mol N2= 1.2 * 22.4 L = 26.88 L
3 mol H2 = 3 * 22.4 L = 67.2 L
0.5 mol CO2 = 0.5 * 22.4 L = 11.2 L
10.3 L NO2 = 10.3 / 22.4 L = 0.46 moles
67.2 L SO2 = 67.2 / 22.4 = 3 moles
89.6 L NO = 89.6 /22.4 = 4 moles
1 mole or 22.4 L of NO₂ has a mass of 46 g
44.8 L NO2 = (44.8 /22.4) * 46 grams = 92 grams
1 mole or 22.4 L of H₂ has a mass of 2 g
201.6 L H2 = (201.6 / 22.4) * 2 grams = 18 g
1 mole or 22.4 L of CO has a mass of 28 g
65 grams CO = 65/28 * 22.4 L = 51.9 L
1 mole of F₂ has a mass of 38 grams
152 grams F2 = 152/38 * 22.4 L = 89.6 L
Which of the following elements is used by your body? A) aluminum B) helium C) calcium D) all of the above
HURRRYYY
in a chemical reaction you will always have an excess reactant. true or false?
Answer:
It's False
Explanation:
In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limits the amount of products formed.
Hope this helps you
Answer: false
Explanation:
7. A sound wave travels 500m in 60 seconds. Calculate the speed of the sound?
Answer:
8.33m/s
Explanation:
Given parameters:
Distance traveled = 500m
Time taken = 60s
Unknown:
Speed of the sound = ?
Solution:
The speed the sound can be derived using the expression below:
Speed = [tex]\frac{distance}{time}[/tex]
So;
Speed = [tex]\frac{500}{60}[/tex] = 8.33m/s
Balance the following equations:C(s) +CO2(g)- CO(g)
Answer:
C(s)+CO₂(g)→2CO(g)
Explanation:
Basically you’re adding the compounds until they’re equal on both sides
_____ is the element from which iron is taken.
Carbon
Quartz
Hematite
(C) A metal 'M' has electronic configuration 2, 8, 2. Find the formula of its
12]
a. Hydroxide
b. Phosphate
M = 2 . 8 . 2
Valence Electron of M = 2
M ==> M⁺² + 2 e⁻
a. M⁺² + OH⁻ ==> M(OH)₂
b. M⁺² + PO₄⁻³ ==> M₃(PO₄)₂
Water has a molar mass of 18.0 g/mol. How many particles of water do you drink if you drink 64 oz., or 1893 grams, of water in a day?
Answer:
[tex] \frac{1839}{18} = 102.16[/tex]
Take 102.16 and multiply by avogadros #
and you get 6.33 × 10^25 otherwise A
Answer:
Answer is A
Explanation:
I just took this.
A rocket travels 4500 meters in 150 seconds. What is its average speed?
Answer:
Your average speed was 3.77 Miles per hour
Explanation:
how do i caculate the trmperature change that 725 grams of aluminum will undergo when 2.35x10^4 Joules of thermal energy are added to it?
Answer:
36°C
Explanation:
Given parameters:
Mass of aluminum = 725g
Quantity of heat = 2.35 x 10⁴J
Unknown:
Temperature change = ?
Solution:
To solve this problem, we simply use the expression below:
The quantity of energy is given as:
Q = m C Δt
Q is the quantity of energy
m is the mass
C is the specific heat capacity of aluminum = 0.9J/g°C
Δt is the change in temperature
The unknown is Δt;
Δt = [tex]\frac{Q}{mc}[/tex] = [tex]\frac{2.35 x 10^{4} }{725 x 0.9}[/tex] = 36°C
what is ore of iron
Iron ore are rock rocks
hope this helps
please mark as brainlist
How many mols are in 6.73 x 1024 particles of Cu? A. 6.02 x 1023 mols of Cu B. 11.18 mols of Cu C. 1.12 mols of Cu D. 10 mols of Cu\
Answer:
B. 11.18 mols of Cu
Explanation:
Given parameters:
Number of particles in Cu = 6.73 x 10²⁴ particles
Unknown:
Number of moles = ?
Solution:
A mole of a substance is known to contain the Avogadro's number of particles. To solve this problem;
6.02 x 10²³ particles is contained in 1 mole of a substance
6.73 x 10²⁴ particles will be contained in [tex]\frac{6.73 x 10^{24} }{6.02 x 10^{23} }[/tex] = 11.18moles of Cu
Explanation:
Purpose and Theory: A tablet of vitamin C contains the active ingredient called ascorbic acid (HC,H,0.).
Ascorbic acid is an organic acid which is a white power and is soluble in water.
In the following microtitration lab you will be grinding up a vitamin C tablet
, and using a 0.10 g sample of the
vitamin C powder, which will be dissolved in 20-40 mL of water. This solution will be used to determine the
quantity of ascorbic acid in a commercial vitamin C tablet.
Groups
Lab 2
# of Drops 1 or Drops 2 of Drops 3
96
91
94
Hadia
Data & Analysis:
Complete the missing information in the following data table [24]
1
2
3
Trial
Volume of NaOH (drops)
0 05mL drop
(NaOH (O 0050mol/L)
Volume of NaOH (ML)
Average Volume of NaOH (ml)
T I
O 0050
00050
00050
The balanced chemical reaction between ascorbic acid and sodium hydroxide is:
HC,H,O + NaOH NaC,H,Oye H,O,
1. Stoichiometrically calculate the mass (in grams) of ascorbic acid in the powdered sample.
3. A sample of neon gas has a volume of 1.2 L at 28.5°C. What will the volume be at 125°C it the
pressure remains constant?
Answer:
1.58L
Explanation:
Given parameters:
Initial volume = 1.2L
Initial temperature = 28.5°C = 28.5 + 273 = 301.5K
Final temperature = 125°C = 125 + 273 = 398K
Unknown:
New volume = ?
Solution:
Volume and temperature relationship is resolved using the Charles's law.
The law states that "the volume of a fixed mass of a gas varies directly as its absolute temperature if the the pressure is constant".
So;
[tex]\frac{V1}{T1}[/tex] = [tex]\frac{V2}{T2}[/tex]
V1 is the initial volume
T1 is the initial temperature
V2 is the new volume
T2 is the new temperature
[tex]\frac{1.2}{301.5}[/tex] = [tex]\frac{V2}{398}[/tex]
301.5V2 = 477.6
V2 = 1.58L
when an ecosystem changes the results are (positive negative both or none) explain
This is science!
Answer:
C. Both
Explanation:
When an Ecosystem changes the effects can be both positive and negative. It all really just depends on what the change is.
A student investigated the reaction of magnesium with oxygen.
The student calculated that 4.8 g of magnesium would make 8.0 g of magnesium oxide.
The equation for the reaction is:
2Mg + O2 → 2MgO
What mass of oxygen is required to produce 8.0 g of magnesium oxide from 4.8 g of magnesium?
Based on The Law of Conservation of Mass Lavoisier, the mass of oxygen required is 3,2 g
The two main postulates that was given by Antoine Lavoisier are, oxygen play an important role in combustion and the other is mass of the reactant and product is conserved. Therefore the mass of oxygen is 3.2 g.
What is law of conservation of mass?According to Law of conservation of mass, mass can neither be created nor be destroyed. Mass can only be transformed from one form to another. The law of conservation of mass was given by Antoine Lavoisier.
Every reaction in nature follow the law given by Antoine Lavoisier that is mass is always conserved. Another postulated that was given by Antoine Lavoisier is the role of oxygen in combustion reaction. Combustion can not happen without presence of oxygen. According to Law of Conservation of Mass Lavoisier, the mass of oxygen required is 3.2 g.
Therefore the mass of oxygen is 3.2 g.
To know more about law of conservation of mass, here:
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plz help!!
How many total oxygen atoms are present in the reaction below? (note that it is unbalanced)
C3H7OH + O2 -> CO2 + H2O
Balanced equation for
GaF3 +
Cs →
CSF +
Ga
What is a speed of 55 mph equivalent to in units of m/s? (1 mile = 1609 m, 1 hour = 3600 s)
Answer:
24.58 m/s
Explanation:
Given that,
Speed of an object = 55 mph
We need to find the equivalent unit in m/s
We know that,
1 mile = 1609 m
1 hour = 3600 s
So,
[tex]55\ mph=\dfrac{55\times 1609\ m}{3600\ s}\\\\=24.58\ m/s[/tex]
So, the required speed is 24.58 m/s.
Plz answer as soon as possible :)
Answer:
5.99
Explanation:
hope this helps you
y’all pleasee answer these
please help i will mark brainlist
Answer:
432cm³
Explanation:
Given parameters:
Length = 12cm
Height = 6cm
Width = 6cm
Unknown:
V = ?
Solution:
We have been given that;
V = L x W x H
So;
V = 12cm x 6cm x 6cm = 432cm³
During a chemical reaction, the______
is not fully consumed.
A)
ideal chemical
B)
excess reactant
C)
limiting reagent
D)
stoichiometric compound
Answer:
limiting reagent :)
Explanation:
Answer:
B) excess reactant
Explanation:
During a chemical reaction, the excess reactant is not fully consumed.
Which of the following properties are most typical for nonmetals? Check all that apply.
Answer:
B) Poor conductors
Explanation:
According to the characteristics of non-metals , non-metals are poor conductors of electricity and are mostly gases at room temperature and are also brittle.
What are the characteristics of non-metals?
An element is the simplest form of matter.Elements are further classified as metal,non -metals and metalloids. Non-metals do not possess luster and are dull . They are not malleable and ductile and are soft due to the covalent bonding present in them . Non-metals owing to their soft nature have low melting points.
As they have large intermolecular spaces they are mostly gases at room temperature and are also brittle due to the presence of weak bonding present in them.They are poor conductors as they do not have mobile electrons.They have low tensile strength due to presence of covalent bonding.
Learn more about characteristics of non-metals,here:
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Can someone help me please but on those two questions
Answer:
In first mcq correct option is "solid" while in 2nd correct is "gas"
Explanation:
What is 2+2 plzzzzz help I’m only 83
Answer: 4
Explanation: if you move to spaces in a number line from 2 you would be at 4
What characteristic of an element’s atoms always determines the element’s identity?
Answer:
Number of protons
Explanation:
There are three sub atomic particles. These are;
- Protons
- Electrons
- Neutrons
Among these three particles, only one determines the identity of the element. This is the Protons. The number of protons which is also called the atomic number determines the identity of an element. For instance, atom with one proton is Hydrogen and n other element can have atomic number of one.