Answer:
pH = 3.0 ya that's it......
How many moles of NaOH are in a 50.0 g sample of NaOH?
Answer:
The answer should be, 0.01
Explanation:
0.01 = moles of NaOH
[tex] \huge\boxed{ \boxed{\boxed{ \boxed{\mathcal{Answer ࿐ }}}}}[/tex]
[tex] \mathrm{1 \: mole \: of \: NaOH = 40 \: g }[/tex]
[tex] \mathrm{1g = \dfrac{1}{40} \: moles \: of \: NaOH}[/tex]
[tex] \mathrm{50g = \dfrac{1}{40} \times 50}[/tex]
[tex] \mathrm{1.25 \: moles \: of \: \: NaOH}[/tex]
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
Where must the moon be in its orbit for the full moon phase to be visible?
A
exactly crossing Earth's orbit of the sun
B
on the side of Earth opposite the sun
C
between Earth and the sun
D
directly above one of Earth's poles
Answer:
A.EXACTLY CROSSING EARTH'S ORBIT OF THE SUNThe moon must be exactly crossing Earth's orbit of the sun for the full moon phase to be visible.
What is Full moon?This is a situation where the Sun and the Moon are aligned on opposite sides of Earth with a corresponding illumination from the Sun.
It also occurs when the moon crosses the Earth's orbit of the sun and is denoted as option A.
Read more about Full moon here https://brainly.com/question/649027
#SPJ2
How does increased exhalation of CO2 at the lungs (pulmonary regulation) restore the correct pH range?
Answer:
When CO2 levels become excessive, a condition known as acidosis occurs. This is defined as the pH of the
blood becoming less than 7.35. The body maintains the balance mainly by using bicarbonate ions in the
blood. As the body responds to neutralize this condition, an electrolyte imbalance – an increase of plasma
chloride, potassium, calcium and sodium, can occur.
Define trace gas in simple
an organism that lives in or on another organism and causes harm to is a
A. host
B. parasite
C. prey
D. producer
the answer is B. Parasite.
Calculate the density of the baseball. Use the formula
D= m/V
where D is the density, m is the mass, and V is the
volume.
Determine whether the density of baseball is within the
legitimate range for an official baseball.
Record your answers in Table C of your Student Guide.
What is the density of the baseball?
g/cm3
The acceptable density range of official baseballs is
between 0.70 g/cm3 and 0.80 g/cm3. Is the
questionable ball in this range of acceptable density?
Answer:
0.73 and yes
Explanation:
The answers are 0.73 and yes! <3 ^-^
The speed you read from your speedometer is your ____________________. *
average speed
direction
instantaneous speed
distance
Answer:
it is your instantaneous speed
Explanation:
What element is this? Is it a neutral atom or ion?
A car travels at 24km/hr to the north. Then it travels 24km/hr to the east. Which is true about the car's acceleration?
a
The car accelerated because it speed increased.
b
The car accelerated because it changed direction.
c
The car did not accelerate because its speed did not change.
d
Only the velocity changed, not the acceleration not the acceleration.
Answer:
D
Explanation:
Which combinations of particles form ionic bonds/compounds?
Answer:
Iconic bond is formed by cation and anion. A compound is made when atoms of two or more elements bond in a chemical reaction.
Explanation:
The chemical name for MgCl3
Answer:
The chemical name is magnesium chloride
Answer:
Magnesium chloride
Please mark as brainliest if answer is right
Have a great day, be safe and healthy
Thank u
XD
NEED HELP ASAP 20 POINTS !!!!!What does a subscript in a chemical formula tell you? For example the 3 in Rb3PO4 the number of atoms of the element symbol it follows the number of atoms of the element symbol it is in front of the number of molecules
Answer:
The answer should be A
Explanation:
because the definition of a subscript is that they indicate the number of atoms of an element present in am molecule or formula unit.
Answer:
The first choice. The rule is go left. Those subscript numbers always talk about the element to the left of them.
Explanation:
The straight forward answer is the first one.
You should always answer that when reading the chemical make up of molecules. Let's look at some examples.
C8 H18
Consider the 8. It must be describing how many carbons there are. If it was meant for the hydrogen, then what does the 18 mean? You wouldn't know.
Now look at something a lot more complicated.
Mg3(PO4)2
Use the going left rule. That satisfies Mg doesn't it? There are 3 of them and 3 is correct.
The two at the end is also straightforward if you think about it. It must be telling you how many molecules are in the brackets. If that were not so, then you wouldn't be able to tell what it did. So there are 2 PO4
But you still have the 4 to deal with. Use the going left rule again. 4 must be telling you how many oxygens you have inside the brackets. There are 4 of them.
How many mL of a 2.0 M CuCl2 solution are needed to make 500 mL of a 0.5 M solution?
Answer: There is 125 mL of a 2.0 M CuCl2 solution are needed to make 500 mL of a 0.5 M solution
Explanation:
Given: [tex]M_{1}[/tex] = 2.0 M, [tex]V_{1}[/tex] = ?
[tex]M_{2}[/tex] = 0.5 M, [tex]V_{2}[/tex] = 500 mL
Formula used to calculate the volume is as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Substitute the values into above formula as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}\\2.0 M \times V_{1} = 0.5 M \times 500 mL\\V_{1} = 125 mL[/tex]
Thus, we can conclude that there is 125 mL of a 2.0 M [tex]CuCl_{2}[/tex] solution are needed to make 500 mL of a 0.5 M solution.
what is the mass of 4 moles of almunium atom
Answer:
108 grams
Explanation:
Which characteristics do stable ecosystems tend to have
Answer:
Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity. Every factor in an ecosystem depends on every other factor, either directly or indirectly.
_Ch7H16+_O2=_CO2+_H2O balancing the equation
Answer:
0,11,7,8
Explanation: hope this helps!
How is ethanol DIFFERENT from gasoline?
A. Ethanol is alcohol; gasoline is fuel.
B. Ethanol becomes a bacteria; gasoline becomes a chemical.
C. Ethanol helps break down yeast; gasoline is a by-product of
yeast.
D. Ethanol is made from oranges; gasoline is made from
petroleum
How does the atmospheric pressure at altitudes above sea level compare with atmospheric pressure at sea level?
A. The atmospheric pressure above sea level is higher.
B. The atmospheric pressure at sea level is higher.
c. The pressures are the same.
D. Differences in pressures cannot be determined.
Answer:
Option B
The atmospheric pressure at sea level is higher.
Explanation:
Atmospheric pressure can simply be understood as the weight of the air molecules in the atmosphere. The higher we go up into the atmosphere, the thinner the air becomes. This means that the air present at higher heights is not so much, and hence, the air is lighter. This is why most fighter jets and mountain climbers need oxygen tanks to breathe properly.
Due to the fact that the air is less dense (lighter) at higher altitudes, it also means that the atmospheric pressure at higher altitudes is less.
Therefore, the atmospheric pressure at the sea level is higher than the atmospheric pressure at altitudes above sea level
Answer:
B. The atmospheric pressure at sea level is higher.
Explanation:
How do textbooks usually describe Le Châtelier's famous principle
Answer:is an observation about chemical equilibria of reactions. It states that changes in the temperature, pressure, volume, or concentration of a system will result in predictable and opposing changes in the system
Explanation:
50 POINTS!!!
When writing a chemical reaction equation, what does the arrow ( ---> ) represent?
A. the reactants are making the products
B. the direction of the chemical equation
C. the chemical reaction cannot be reversed
D. all of the above
The condition or progress of a reaction is represented by reaction arrows. The chemical reaction arrow is a single straight arrow that points from the reactant(s) to the product(s) and by-products, as well as side products.
I think this should help you find the answer more easy!
¿Qué estudia la química orgánica?
Answer: el estudio de la síntesis, estructura, reactividad y propiedades del diverso grupo de compuestos químicos construidos principalmente de carbono
Explanation:Hope I helped:)
Which shows an isomer of the molecule below?
Answer: C
Explanation:
Don’t trust the other person it’s not A
*view photo for answer*
pay attention! the answer choices aren't always in the same order!
What is the molar mass of H2S?
0 518
65.15 g
17 g
78.16 g
34.1g
how many moles of gold is 9.75 x 10^24 atoms?
Answer:
1 Answer. You use the fact that 1 mole of any substance contains exactly 6.022⋅1023 atoms or molecules of that substance - this is known as Avogadro's number. In your case, 1 mole of gold will have exactly 6.022⋅1023 atoms of gold.
Explanation:
Answer:
[tex]\boxed {\boxed {\sf 1.62 \ mol \ Au}}[/tex]
Explanation:
We are asked to convert atoms to moles.
1. Avogadro's NumberWe know that 1 mole of any substance contains the same number of particles (atoms, molecules, formula units etc.) This is Avogadro's Number: 6.022*10²³. For this question, the particles are atoms of gold (Au).
2. Convert Atoms to MolesLet's set up a proportion using this information.
[tex]\frac {6.022*10^{23} \ atoms \ Au}{1 \ mol \ Au}[/tex]
Since we are solving for the moles in 9.75 * 10²⁴ atoms, we multiply by that number.
[tex]9.75*10^{24} \ atoms \ Au*\frac {6.022*10^{23} \ atoms \ Au}{1 \ mol \ Au}[/tex]
Flip the proportion. It will be equivalent, but the units of "atoms Au" can cancel.
[tex]9.75*10^{24} \ atoms \ Au*\frac {1 \ mol \ Au}{6.022*10^{23} \ atoms \ Au}[/tex]
[tex]9.75*10^{24} *\frac {1 \ mol \ Au}{6.022*10^{23}}[/tex]
Condense the problem into 1 fraction.
[tex]\frac {9.75*10^{24} }{6.022*10^{23}}\ mol \ Au[/tex]
[tex]1.619063434 \ mol \ Au[/tex]
3. RoundThe original measurement (9.75) has 3 significant figures. Our answer must have the same. For the number we found, that is the hundredth place.
1.619063434The 9 in the thousandth place tells us to round the 1 to a 2 in the hundredth place.
[tex]1.62 \ mol \ Au[/tex]
9.75 * 10²⁴ atoms of gold is approximately equal to 1.62 moles of gold.
What volume would be occupied by 16.0 g of CH4 at 00C and 760 mmHg?
Answer:
22.4 L
Explanation:
We'll begin by calculating the number of mole in 16.0 g of CH₄. This can be obtained as follow:
Molar mass of CH₄ = 12 + (4×1)
= 12 + 4
= 16 g/mol
Mass of CH₄ = 16 g
Mole of CH₄ =?
Mole = mass / molar mass
Mole of CH₄ = 16 / 16
Mole of CH₄ = 1 mole
Finally, we shall determine the volume of the gas. This can be obtained as follow:
Number of mole of CH₄ (n) = 1 mole
Pressure (P) = 760 mmHg = 1 atm
Temperature (T) = 0°C = 273 K
Gas constant (R) = 0.0821 atm.L/Kmol
Volume (V)?
PV = nRT
1 × V = 1 × 0.0821 × 273
V = 22.4 L
Therefore, the volume of the gas is 22.4 L
Al hacer reaccionar 5g de cinc con ácido sulfúrico se observa que la reacción ocurre en 20s. ¿Cuál será la rapidez de la reacción? Masa atómica del cinc 65,37g.
Answer:
0.0038 mole s-1
Explanation:
La velocidad de una reacción se refiere a la rapidez o la lentitud con que avanza una reacción. Se mide por la cantidad de reactivos que desaparecen por unidad de tiempo o por la cantidad de productos que aparecen por unidad de tiempo.
Número de moles de zinc = 5g / 65.37gmol-1 = 0.076 moles
Velocidad de reacción = 0.076 moles - 0 moles / 20 s - 0s = 0.0038 mole s-1
Which is an example of cooperation?
individual ants together make up an ants’ nest
when an organism is more successful at hunting than another
when an organism finds a new way to get itself water
when people get together to stop the killing of the hawks, skunks, and weasels
if 300.0g of chlorine is reacted how much calcium hydroxide is needed to react with it
Answer:
334.7g of Calcium Hydroxide are needed
Explanation:
Based on the reaction:
2Ca(OH)2 + 2Cl2 → Ca(ClO)2 + CaCl2 + 2H2O
2 moles of chlorine react with 2 moles of calcium hydroxide.
To solve this question we must find the moles of chlorine in 300.0g. These moles = Moles of Ca(OH)2. With the moles of calcium hydroxide we can find its mass as follows:
Moles Cl₂ (Molar mass: 70.90g/mol)
300.0g Cl₂ * (1mol / 70.90g) = 4.2313 moles Cl₂ = Moles Ca(OH)₂
Mass Ca(OH)₂ (Molar mass: 74.093g/mol)
4.2313 moles Ca(OH)₂ * (74.093g / mol) =
334.7g of Calcium Hydroxide are neededWrite in the correct coefficients for the balanced equation:
Na +
Cl2 →
NaCl
Answer:
Na+Cl2-----NaCl
Explanation:
it's the chemical formula of common salt.
Answer:
2Na + Cl2 → 2NaCl
Explanation:
Na + Cl2 → NaCl
We have two chlorines on the left but only one on the right so it needs to be balanced.
If we put a 2 in front of NaCl we now have 2 chlorines on both sides but now 2 sodiums on the left and one on the right
Add another 2 in front of Na to get the full balanced equation
2Na + Cl2 → 2NaCl
Consider the reaction.
2HF(g) +
H2(g) + F2(g)
At equilibrium at 600 K, the concentrations are as follows.
[HF] = 5.82 x 10-2 M
[H2] = 8.4 x 10-3M
[F2] = 8.4 x 10-3M
What is the value of Kea for the reaction expressed in scientific notation?
O 2.1 x 10-2
102.1 x 102
1.2 x 103
0 1.2 x 10-3
Answer:
0.021
Explanation:
Step 1: Write the balanced equation
2 HF(g) ⇄ H₂(g) + F₂(g)
Step 2: Calculate the value of the concentration equilibrium constant
The concentration equilibrium constant (K) is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.
K for this reaction is:
K = [H₂] × [F₂] / [HF]²
K = (8.4 × 10⁻³) × (8.4 × 10⁻³) / (5.82 × 10⁻²)² = 0.021