Answer:
70 mL
Explanation:
To solve this problem we can use the C₁V₁=C₂V₂ equation, where the subscript 1 refers to the concentrated solution while subscript 2 refers to the diluted one, as follows:
C₁ = 50V₁ = ?C₂ = 7V₂ = 500 mLWe input the data:
50 * x = 7 * 500 mLAnd solve for x:
x = 70 mLThus the answer is 70 mL.
What is the purpose of continuing to heat a substance after it reaches a temperature plateau?
How does plate movement affect earths crust?
how does the law of conservation of mass applies to all chemical reactions?
Answer:
the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.
Explanation:
The law of conservation is Matter cannot be created or destroyed in chemical reactions so it means exactly that
Why has popular media had a negative impact on forensic science?
Answer:
Because it serves their agenda.
On the periodic table, all of the cards in each row (across) have the same what?
For each of the following unbalanced equations indicate how many moles of the second reactant would be required to react exalt with 0.275 mole of the first reactant. Balance the equation.Co(s) + P4 (s) Co3P2 (s)
Answer:
0.183 mol
Explanation:
so balenced equation is 6Co+4P=2(Co3P2)
so so the ratio is 6:4
so .275/6*4
=0.183 mol I think
The Answer will be: 0.183 mol
so that the balanced equation is 6Co+4P=2(Co3P2) When the ratio is 6:4so that .275/6*4
=0.183 mol.
When According to the A balanced chemical is equation has been equal numbers of atoms that are for each element they are involved in the reaction and its represented on the reactant and its product sides.Also that This is a better requirement that makes the equation must be satisfied and also that to be consistent with the law of conservation of the matter. then It may occur that it is confirmed by simply summing the numbers of atoms and also molecules on it either side of the arrow and it's comparing these sums to ensure that they are equal.( 1 CO 2 molecule × 2 O atoms CO 2 molecule) + ( 2 H 2 O molecule × 1 O atom H 2 Molecule ) = 4 O atoms
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Which of the following is/are true regarding chemical
nomenclature?
A. All elements in a compound must be included
in the name.
B. Ionic and molecular nomenclature have
different rules.
C. A formula for an ionic compound is written
with the cation first followed by the anion.
D. A chemical formula must always be reduced to
the lowest whole number ratio.
Answer:
c
Explanation:
i took the quiz
Help only if you know the answer and I will mark brainliest ⚡️⚡️⚡️
Answer:
450 kilometers
Explanation:
i used a calculator
Answer:
450 km
Explanation:
I) Construct an equation to find the distance:
speed x time = distance
15 x 30 = d
II) Solve:
15 x 30 = 450
450 km
Identify what type of reaction is this
2AgCl + H2 → 2Ag + 2HCI
Answer:
single displacement
Explanation:
Which of the following statements is true a A) dams are made of molecules B) Adams can join to form molecules C) atoms contain more than one element D) some atoms do not have protons
1. 2 NH3 → N2 + 3 H2
If 2.8248 moles of H2 are produced, how many moles of NH3 were reacted?
2. CaCO3 → CaO + CO2
If 288.53 grams of CaCO3 are reacted, how many moles of CaO will be produced?
3. 2 KClO3 → 2 KCl + 3 O2
If 92.25 grams of KCl are produced, how many grams of O2 will also be produced?
4. 2 As + 6 NaOH → 2 Na3AsO3 + 3 H2
If 3.0482 moles of NaOH are reacted with 212.2 grams of As, how many moles of H2 will be produced?
5. Sn + 2 CuCl → SnCl2 + 2 Cu
If 2.1492 moles of CuCl are reacted with 355.58 grams of Sn, how many moles of SnCl2 will be produced?
Answer:
BRO IM IN ONLY 7TH GRADE
Explanation:
Which statement best distinguishes comets from nebulae? A. Nebulae can form stars, but comets cannot. B. Comets are in galaxies, but nebulae are not. C. Nebulae have moons. but comets do not. D. Comets can be part of a constellation, but nebulae cannot.
Answer: A-Nebulae can form stars, comets cannot
Explanation: Simply comets get destroyed and Nebulae are often star-forming regions, such as in the "Pillars of Creation" in the Eagle Nebula. In these regions, the formations of gas, dust, and other materials "clump" together to form denser regions, which attract further matter, and eventually will become dense enough to form stars.
While Nebulae is a body of interstellar cloud, made of cosmic dust, hydrogen etc , Comets are balls of rocks, frozen gases, that revolve the Sun.
Nebulae can form stars, but comets cannot. Option A is correct
What distinguishes comets from nebulae?Nebulae is a different body of interstellar cloud, they are made out of cosmic dust, hydrogen, helium, and molecular clouds.
While Comets are balls of rock, frozen gases, and other particles that revolve around the Sun.
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In which location would fishermen most likely catch a greater number of fish?
O A. at the shoreline
B. in an upwelling
C. in the intertidal zone
D. on the deep-ocean floor
Is warm water or cold water more dense
2. If the direction of an applied force is changed once, to what was the force applied?
A. a compound machine
B. a heat engine
C. an electrical machine
D. a simple machine
Answer:
the answer is( D)a simple machine
what are the reactions in a chemical reaction
A. the new substances that are produced
B. the substances that interact
C. the catalysts
D. the chemical formula of the substances
Answer:
B
Explanation:
chemical reaction a process in which one or more substance the recessed ants are converted to one or more different substances the products substances are either chemical elements or compounds a chemical reaction rearranges the consulstituent atoms of reactants to create different substances products
which statements correctly identify charecteristics of earth and jupiter
Answer:
There are no statements listed but.... a few ideas
Explanation:
Earth is very small in comparison to Jupiter which is the largest planet of the solar system.
The diameter of Jupiter is 11 times greater than the diameter of the earth.
Earth is a terrestrial planet, whereas Jupiter is a Jovian planet.
How many molecules are in 83.2 g of chlorine gas (Cl2)?
Group of answer choices
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Answer:
Try everything or guess, that will always work
1.42 x 10^24 molecules
1.78 x 10^28 molecules
7.04 x 10^23 molecules
14.2 x 10^24 molecules
Explanation:
An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature as follows:
Answer:
The concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.
Note: The question is incomplete. The complete question is as follows:
An initial mixture of nitrogen gas and hydrogen gas is reacted in a rigid container at a certain temperature as follows:
3H2(g)+N2(g)⇌2NH3(g)
At equilibrium, the concentrations are
[H2] = 5.0 M, [N2] = 8.0 M, and [NH3] = 4.0 M.
What were the concentrations of nitrogen gas and hydrogen gas that were reacted initially?
Explanation:
Given the following data:
Concentration of H2 at equilibrium = 5.0 M
Concentration of N2 at equilibrium = 8.0 M
Concentration of NH3 at equilibrium = 4.0 M
The given equilibrium reaction is,
Initial a b c
Change -3x -x +2x
Equilibrium (a-3x) (b-x) +2x
The value of x is calculated from the equilibrium of NH3
Concentration of NH3 at equilibrium = 4.0 M = 2x
x = 2.0 M
Substituting the value of x above
Initial Concentration of H2:
a - 3 × 2.0 M = 5.0 M
a = 6.0 M + 5 = 11.0 M
Initial Concentration of N2:
b - 2.0 M = 8 M
b = 8.0 M + 2.0 M
b = 10.0 M
Therefore, the concentration of nitrogen gas and hydrogen gas that reacted initially are 10.0 M and 11.0 M respectively.
As the slope or incline of the land increases, the speed of the water ________________.
Answer:
increase
Explanation:
ok so this is a answer
Please help ASAP!!
I am not sure how to solve this!
Answer:
Potassium (K) has 19 protons.
Each neutral atom of Potassium has 19 electrons.
Explanation:
A) Potassium has 19 protons because the atomic number tells us how many protons are in an atom of the element. (The atomic number is the number above the element symbol. For example, the number above "K" is 19, which is the atomic number).
B) If an atom is neutral, this means that the atom has neutral energy. Protons give positive energy and electrons give negative energy. For the atom to be neutral, the atom must have balanced energy, therefore, making the number of electrons equal to the number of protons in a neutral atom.
Write the combustion equation for propane (C3H8). What is the sum of the coefficients for the reactants and products? Group of answer choices 13 14 10 11 12
Answer:
13
Explanation:
Let's consider the unbalanced equation for the combustion of propane.
C₃H₈ + O₂ ⇒ CO₂ + H₂O
We will begin balancing H atoms by multiplying H₂O by 4.
C₃H₈ + O₂ ⇒ CO₂ + 4 H₂O
Now, we balance C atoms by multiplying CO₂ by 3.
C₃H₈ + O₂ ⇒ 3 CO₂ + 4 H₂O
Finally, we get the balanced equation multiplying O₂ by 5.
C₃H₈ + 5 O₂ ⇒ 3 CO₂ + 4 H₂O
The sum of the coefficients is 1 + 5 + 3 + 4 = 13.
9. Do all enzymes function at the same pH?
Each enzyme has an optimum pH but it also has a working range of pH values at which it will still work well. This depends on the type of enzyme. The enzyme pepsin breaks down proteins in the acidic conditions of the stomach. ... Catalase has an optimum pH of 9 and a working range of between pH 7-11. Hope this was helpful
Explanation:
Which element or compound has lost electrons in this oxidation-reduction reaction?
4Li + 2CoO → 2Co + 2Li2O
A.
CoO
B.
Li2O
C.
Li
D.
Co
E.
O
Answer:
C. Li
Explanation:
Where does the light we see from the moon come from?
I Need Help with this plz
Answer:
a
Explanation:
what is 5x6?
also, to all of the slime rancher players!!
what is your favorite slime? mine is the dervish. dem lil tornado beans :D
Answer:
30 boiii lol my fav is 110% fire slime or tangle slime. they are BESTTT
Which is a characteristic of atoms?
They come in ten major
They are the smallest units of matter
They can be divided
They cannot combine together
Answer:
the second one ..........
Which is Earth's largest source of drinkable water?
O A. lakes
O B. rivers
OC, oceans
O D. aquifers
Answer:
D.)
Explanation:
How many moles are in 187 grams of NH3?
11 moles
13.4
moles
3,179 moles
2,618 moles
Answer:
3126 moles
Explanation:
put them all together times them and add