Answer:3600 meters
Explanation:
If a car travels 60 meters a second for 60 seconds that means it traveled 60*60 meters which is 3600
a.
Zn (s) + HCl (aq)
→ ZnCl2 (aq)
+ H2(g)
b. 2H20 (1)→ H2(g) + O2(g)
c. ALC3 (s) + H20 (1) → CH4 (g) + Al(OH)3 (s)
d. CH4 (g) + 2O2(g) → CO2 (g) + 2H20 (3)
Which chemical equation supports the law of conservation of mass
Answer:
CH₄ + 20₂ → CO₂ + 2H₂O
Explanation:
The reaction equation that supports the law of conservation of mass is the one in which the number of atoms on both sides of the expression are found to be the same.
The law of conservation of mass states that "in a chemical reaction, matter is neither created nor destroyed".
The reaction expressions are given as:
Zn + HCl → ZnCl₂ + H₂
2H₂O → H₂ + O₂
AlCl₃ + H₂O → CH₄ + Al(OH)₃
CH₄ + 20₂ → CO₂ + 2H₂O
In the highlighted reaction above:
Number of atoms
Reactants Products
C 1 1
H 4 4
O 4 4
Pls help please!!! I really need help :(
How can you differentiate or measure the strengths of acids and bases qualitatively and quantitatively?
What affect might plate movement have on the size of the ocean basin
(Science)
The affect of plate movement might have on the size of the ocean basin would be negative and over many millenia it will gradually decrease in size
HELP ASAP ITS TIMED!!!
Which of the following hydrocarbon are the most reactive?
Select one:
a. C7H12
b. C8H18
c. C7H16
d. CH4
Answer:
C would be the right answer
Answer:
B
Explanation:
I have a similar question and it was correct try B
Tin fluoride, SnF2, is used in some toothpastes. It is made by the reaction of tin with hydrogen fluoride according to the following equation: Sn(s) + 2HF(g) --> SnF2(s) +H2(g). If a toothpaste manufacturer reacts 30.00 of HF with enough tin, how many grams of SnF2 can they expect to get?
Please show your work or how you got the answer, I really need it.
Mass of SnF2 : 117.53 g
Further explanationGiven
Reaction
Sn(s) + 2HF(g) --> SnF2(s) +H2(g).
30 g of HF
Required
mass of SnF2
Solution
mol HF (MW= 20 g/mol) :
= mass : MW
= 30 : 20
= 1.5
From the equation, mol ratio of HF : SnF2 = 2 : 1, so mol SnF2 :
=1/2 x mol HF
= 1/2 x 1.5
= 0.75
mass SnF2(MW=156.71 g/mol) :
=mol x MW
= 0.75 x 156.71
= 117.53 g
The Earth’s circumference around the equator is slightly bulged as compared to the circumference around the poles. If the circumference around Earth’s equator is 29,902 miles, what is this in Mm?
Answer: 48.123 Mm
Explanation:
Calculate the second volumes.
7.03 Liters at 31 C and 111 Torr to STP
The second volume : V₂= 0.922 L
Further explanation Given7.03 Liters at 31 C and 111 Torr
Required
The second volume
Solution
T₁ = 31 + 273 = 304 K
P₁ = 111 torr = 0,146 atm
V₁ = 7.03 L
At STP :
P₂ = 1 atm
T₂ = 273 K
Use combine gas law :
P₁V₁/T₁ = P₂V₂/T₂
Input the value :
0.146 x 7.03 / 304 = 1 x V₂/273
V₂= 0.922 L
Lee dissolved 8 grams of a salt in a certain amount of water to obtain 608 grams of salt solution. What was the mass of the water used to make the solution?
616 grams
608 grams
600 grams
8 grams
Answer:D. 8 grams
Explanation:Took test.
Elephant toothpaste is an example of a chemical reaction.
True
False
True, "The foam is oxygen-filled bubbles that result from the hydrogen peroxide being broken down into water (H2O) and oxygen (O2)."
10. As the temperature of a fixed volume of a gas increases, the pressure will _______
answer is increase
according to the kinetic molecular theory which statement describes the particles in a sample of an ideal gas
Answer:
According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas? The motion of the gas particles is random and in a straight-line.
Explanation:
look at the answerAccording to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas? The motion of the gas particles is random and in a straight-line.
What happens to the volume of a liquid when pressure is applied? A. Increases B. Decreases C. Stays the same D. Evaporates
Answer:
it willl have less dense and decreases the voloume of liquid .
Answer:
Stays the same maybe?
Explanation:
Changes in presure have very little effect on the volume of a liquid. Liquids are relatively incompressible because any increase in pressure can only slightly reduce the distance between the closely packed molecules. If the pressure above a liquid is increased sufficiently, the liquid forms a solid.
will give free brainlist !! :)
Answer:
C is the correct answer
Explanation:
Answer:
C) 2920 J
Explanation:
have a happy day please can I have the brainlist I have bin trying to get one for a WEEK PLZ PLZ PLZ!!!
One type of butterfly has either green and pink wings or solid green wings. One year many more solid green butterflies survived than the
green and pink ones.
Why did more of the green butterflies survive?
O A They were able to build nests higher in the forest canopy.
OB. They were able to eat different types of foods other than just plants.
O c They were able to fly faster because they had different types of wings.
OD. They were able to blend in better with the plants and hide from predators.
Answer:
C
Explanation:
C is the only answer that is affected by the color of the wings.
How many moles of iron in a sample that contains 7.91×10^23 atoms of iron?
Answer: 1.31
Explanation:
No.of moles = given no.of atoms/Avagadro number
= 7.91×10^23 / 6.022 x 10^23
= 1.31
therefore, no.of moles = 1.31
Hope it helped u,
pls mark as the brainliest
^_^
the equation of bromination of methane
Carbon is the most common element in the human body.
True
False
state the reason
What type of specialized cell in the eye is used for detecting low levels of light?
rod cell
cone cell
blood cell
stem cell
Answer:
Cone Cell
Explanation:
There are about six to seven million cones in a human eye and are most concentrated towards the macula. Cones are less sensitive to light than the rod cells in the retina (which support vision at low light levels), but allow the perception of color.
Most non-metals are
A.) easy to hammer and shape (malleable)
B.) liquid at room temperature
C.) shiny in appearance
D.) poor conductors of heat (insulators)
Answer:
D. poor conductors of heat ( insulators)
Sample A is measured to have a mass of 7.3g and sample B has a mass of 8.28g. Which measurement best describes their combined mass?
A.16g
B.15.58g
c.15.5g
D15.6g
Could someone suggest an experiment to the statement on why hydrogen peroxide is stored in a dark bottle
Answer:
Hydrogen peroxide is not stored in clear bottles because they are transparent and light can easily penetrate through these glass bottles to oxidize into water and oxygen gas
Explanation:
there you go
Why methanol is not an alkane
Answer: it’s not in the first group in the periodic table
Explanation:
fill in the blank the proportion
5:7=_____:49
18:_____=6:4
[tex]3a - (b.a) - (c - d) + 4d + 5c - 8a = [/tex]
Answer:
(1) 3
(2) 12
(3) -ab+4c+5d-5a
What are characteristics of a chemical equation?
a.Equation must contain correct formulas for reactants and products.
b.Equation must represent known facts .
c.Equation must satisfy Law of Conservation of Mass.
d.All of the above.
e.Number 1 and 3 only.
What is the formula for compound formed by Iron ( II ) ions and chromate ions?
Answer:
The formula of the compound formed by Iron (ii) ions and chromate ions is FeCrO₄
Explanation:
Iron (ii) ions, Fe²⁺ have a positive charge of +2. Chromate ions, CrO₄²⁻, on the other hand have a positive charge of -2. When iron (ii) ions and chromate ions combine two form a compound, each ion will contribute a mole of ion towards the formation of the compound. This is in line with the idea that a compound carries no charge. The positive charge (+2) of the iron (ii) ions are balanced by the negative charge of the chromate ions as shown mathematically as follows;
+2 + (-2) = 0; i.e. Fe²⁺ + CrO₄²⁻ = FeCrO₄
Therefore, the formula of the compound formed by Iron (ii) ions and chromate ions is FeCrO₄
The formula formed by the compound by Iron ii ions and chromate ions will be FeCrO₄
What will be the formula for the compound of Iron ii and chromate ions?Iron (ii) ions [tex]\rm Fe^{2+}[/tex] have a positive charge of +2. Chromate ions, [tex]\rm CrO_3^{2-}[/tex] on the other hand, have a positive charge of -2.
When iron (ii) ions and chromate ions combine to form a compound, each ion will contribute a mole of ion towards the formation of the compound.
This is in line with the idea that a compound carries no charge. The positive charge of the iron (ii) ions 2+ are balanced by the negative charge of the chromate ions -2 as shown mathematically as follows;
[tex]\rm +2+(-2)=0[/tex]
[tex]\rm Fe^{2+} +CcrO_4^{2-}=FeCrO_4[/tex]
Thus the formula of the compound formed by Iron (ii) ions and chromate ions is FeCrO₄
To know more about Chemical compounds follow
https://brainly.com/question/26487468
1.5g of magnesium ribbon is burnt in oxygen to produce 2.5g of magnesium oxide. How much oxygen is required in grams?
Answer:
2.5 grams
Explanation:
law of conservation of mass applies. the magnesium completely burns
Scientists found evidence of a fish that lived
millions of years ago. The fish had features that
were possibly used to move on land. This fish is
now extinct.
What scientific evidence did the scientists most
likely find that confirmed the existence of this fish?
a fossil
B.
a description
C.
a photograph
D.
a cave drawing
Answer:
fossil
Explanation:
Using stoichiometry a student determines that 33.3 grams of PbCrO4 will be produced during a reaction. After performing the experiment, 27.2 grams of PbCrO4 are collected. What is the percent yield of the reaction?
Answer:
81.7% is percent yield of the reaction
Explanation:
Percent yield of a reaction is defined as 100 times the ratio between actual yield and theoretical yield of the reaction. The theoretical yield is obtained using stoichiometry.
In the problem, theoretical yield was 33.3g of PbCrO₄ and the yield obtained was of 27.2g of PbCrO₄. That means percent yield is:
27.2g / 33.3g * 100
= 81.7% is percent yield of the reaction
Determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
The volume of H₃PO₄ : 13.33 ml
Further explanationGiven
0.003 M Phosphoric acid-H₃PO₄
40 ml of 0.00150 M Calcium hydroxide-Ca(OH)₂
Required
Volume of H₃PO₄
Solution
Acid-base titration formula
Ma. Va. na = Mb. Vb. nb
Ma, Mb = acid base concentration
Va, Vb = acid base volume
na, nb = acid base valence (amount of H⁺/OH⁻)
H₃PO₄⇒3H⁺ + PO₄³⁻ ⇒ 3 H⁺ = valence = 3
Ca(OH)₂⇒Ca²⁺ + 2OH⁻⇒ 2 OH⁻ = valence = 2
Input the value :
a = H₃PO₄, b = Ca(OH)₂
0.003 x Va x 3 = 0.0015 x 40 x 2
Va = 13.33 ml
how many moles are in 1.02 x 10^23 atoms of argon gas
Answer:
0.17 mol
Explanation:
Given data:
Number of atoms of Ar gas = 1.02×10²³ atom
Number of moles = ?
Solution:
The given problem will solve by using Avogadro number.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
1.02×10²³ atom × 1 mol / 6.022 × 10²³ atoms
0.17 mol
Avogadro number:
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
