Answer:
1.7
Explanation:
The formula to be used here is;
pH = -log[H⁺]
To determine the concentration of H⁺ of the nitric acid (HNO₃), formula for molarity is used
Molarity = number of moles/volume (in dm³ or L)
number of moles (n) = given mass/molar mass
Molar mass of HNO₃ = 1 + 14 + (16 x 3)
= 63g
given mass (in grams) = 320mg⇔0.32g (where 1000mg = 1g)
Thus; n = 0.32/63
n = 0.0051 moles
Volume of acid = 290 mL ⇔ 0.29 L (where 1000 mL = 1L)
Molarity = n/volume;
0.0051/0.29
Molarity = 0.018M
pH = -log 0.018
pH = 1.7
What does Newton’s first law of motion state?
Answer:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.
Explanation:
Answer:
Before Galileo and Newton, many people thought that objects lost speed because they had a built-in natural tendency to do so. But those people weren't taking into account the multiple forces here on Earth - for example, friction, gravity, and air resistance - that cause objects to change their speed. If we could see the motion of an object in deep interstellar space, we would be able to observe the natural tendencies of an object that is free from any external influence. In deep interstellar space we would observe that if an object had a speed, it would continue to move with that speed until there was some force causing a change in its motion. Likewise, if an object were at rest in interstellar space, it would remain at rest until there was a force causing a change in its motion.
Explanation:
Hope it helped you =)
Why can't silver have a mass number of 107.87?
Answer:
Silver does have a mass of 107.87.
Explanation:
What is the volume of a substance that has a mass of 20 g and a density
of 4.0 g/ml?
Answer:
The answer is 5 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
So we have
[tex]volume = \frac{20}{4} \\ [/tex]
We have the final answer as
5 mLHope this helps you
The oxidation number that the Alkaline Earth Metals normally have when forming compounds is
Answer:
+2
Explanation:
All the alkaline earth metals have 2 valence electrons in their valence shell. Therefore, they lose 2 electrons to form cations with a +2 charge. For example, Mg²⁺.
Hope that helps.
Calculate the mass of a sample of fruit sugar, fructose,
C6H1206, containing 2.65 X 1020 molecules.
Answer:
, containing 2.65 X 1020 molecules.
Explanation:
The mass of a sample of fruit sugar (fructose) C₆H₁₂O₆, containing 2.65 ×10²⁰ is equal to 2.88 g.
What is Avogadro's number?Avogadro’s number can be defined as the number of units in one mole of any chemical substance. Generally, these entities can be electrons, molecules, atoms, ions, or protons, depending upon the kind of chemical reaction or reactants and products.
The value of Avogadro’s constant is found approximately 6.022 × 10²³ mol⁻¹.
Given, the number of molecules of fructose = 2.65 ×10²⁰
The molar mass of the fructose = 180.16 g/mol
So 6.022 × 10²³ molecules of fructose have mass = 180.16 g
Then 2.65 × 10²⁰ fructose molecules will have mass = 2875.04 × 10⁻³ g
The mass of the 2.65 × 10²⁰ fructose molecules = 2.88 g
Therefore, the mass of 2.65 × 10²⁰ fructose molecules is equal to 2.88 g.
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You are asked to devise a procedure for quality control in a fertilizer plant to check that the nitrogen and phosphorus content is within a specified range. You decide on the outlined steps to monitor a production run of 1000 bags of fertilizer. A. A 50 g sample is removed from every 100th bag of fertilizer produced, resulting in ten 50 g samples. B. Samples 1, 3, 5, 7, and 9 are thoroughly mixed and a 50 g sample of the mixture is removed. C. Samples 2, 4, 6, 8 and 10 and the 50 g sample from the mixture are taken to the analytical laboratory. D. Each 50 g sample is separately dissolved in a fixed volume of water and the solution is filtered to determine the quantity of insoluble material. E. Separate aliquots of the water solutions are subjected to the procedures of phosphorus and nitrogen analysis.
Answer:
Options : A, B and C are correct procedure for quality control in a fertilizer plant
Explanation:
The options that constitute the sampling plan are :
A) A 50 g sample is removed from every 100th bag of fertilizer produced, resulting in ten 50 g samples
B) Samples 1, 3, 5, 7, and 9 are thoroughly mixed and a 50 g sample of the mixture is removed
C) Samples2,4,6,8 and 10 and the 50 g sample from the mixture are taken to the analytical laboratory.
A quality control procedure is used to ensure that a certain product is produced following set standards or meets the required quality desired by the customer . and options A, B and C ensures that.
All matter has thermal energy because atoms are constantly
All matter has thermal energy because atoms are constantly in motion, due to motion all matter possess a kinetic energy. The total kinetic energy is known as thermal energy.
What is kinetic energy?The kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes
Thermal energy and temperature are closely related. Both reflect the kinetic energy of moving particles of matter. However, temperature is the average kinetic energy of particles of matter, whereas thermal energy is the total kinetic energy of particles of matter.
It increases or decreases only when the velocity changes, heavier objects, It can transform into other types of energy. It will occur regardless of the moving object's direction of travel.
Thus, all matters has thermal energy because atoms are constantly in motion.
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What is the independent variable?
Answer:
An independent variable is defines as the variable that is changed or controlled in a scientific experiment. It represents the cause or reason for an outcome. Independent variables are the variables that the experimenter changes to test their dependent variable.
Explanation:
:)
Heres some defs- a variable (often denoted by x ) whose variation does not depend on that of another. The independent variable is the variable the experimenter changes or controls and is assumed to have a direct effect on the dependent variable. ... The dependent variable is the variable being tested and measured in an experiment, and is 'dependent' on the independent variable.
Please help hurry
Pleas help me
Answer:wait nvm i was right its zirconium
the answer should be zirconium
helppp What function does adding a coefficient in a chemical equation serve?
Coefficients cannot be added or changed without describing different substances.
It tells whether the reactants must be exposed to outside factors to make them react.
It balances the equation, ensuring each side of the reaction has an equal number of atoms.
It describes the physical state of the reactant or product to which it is attached.
Answer: The answer is option C. (It balances the equation, ensuring each side of the reaction has an equal number of atoms.)
Explanation:
What are differences between Jupiter and Saturn’s moons
Answer: Well one difference is that Jupiter's moons are large and are closer to each other. Also Jupiter has more moons than Saturn.
Explanation:
Answer:
The difference are :
jupiter moon saturn moon
1.jupitor moon has 4 1.saturn moon
moon has 7 moon
Which of the following is a type of chemical reaction that releases energy from the bonds of a substance to form one or more new substances
Answer: any options like a or b
Explanation:
Do not use cords, and do not plug in many devices into one power source
A venus fly trap snaps shut when a fly lands on the trigger hairs inside its trap.
Which characteristic of life does this represent?
reproduction
A. cell organization
B. heredity
C. response to environment
Answer:
C. Response to environment
a object in a fluid will sink if the
help plz
Answer:
D.
Explanation:
Because if an object is more dense than water it will sink.
How do conduction and convection differ? (4 points)
Conduction can move through empty space to transfer heat; convection cannot.
Conduction does not require objects to have direct physical contact; convection does.
Conduction requires objects to have direct physical contact; convection does not.
Conduction transmits heat through electromagnetic waves; convection does not. PLS HELP
Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas.
So I think you should go with the 3rd option.
Hope this was helpful.
Answer:
What the other guy said
Explanation:
Question 4 of 8
What can cause an object to move?
A. Balanced forces
B. Unbalanced forces
C. Inertia
D. A reference point
SUER
Answer:
unbalanced forces can cause an object to move.
Answer:
Unbalanced Forces
Explanation:
A rectangular metal is 25 dm long, 525 mm wide, and 1.5 m high. This metal weighs 250 lb. Calculate its density in g /mL
Answer:
d = 0.057 g/mL
Explanation:
Given that,
The dimensions of a rectangular metal is 25 dm long, 525 mm wide, and 1.5 m high.
The weight of the metal is 250 lb
We need to find the density of the metal in g/mL.
1 lb = 453.592 g
250 lb = 113398 g
Volume of the block,
V = 25 dm× 525 mm×1.5 m
Since, 1 dm = 0.1 m, 1mm = 0.001 m
V = 2.5 m× 0.525 m× 1.5 m
V = 1.9668 m³
Also, 1 m³ = 1968000 mL
So,
density = mass/volume
density = 113398 g/1968000 mL
= 0.057 g/mL
So, the density of a rectangular metal is 0.057 g/mL.
Identify the results of a substance losing enegry
Explain the difference between the reactants and
products of a chemical reaction.
3
Answer:
:)
Explanation:
The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
Can someone suggest some really good scientific topic for my scientific presentation?
What is the current atomic model called?
Answer:
Quantum Mechanical
Explanation:
This current atomic model evolved from the earlier Rutherford-Bohr model, which compared electrons orbiting an atomic nucleus to planets orbiting the sun. The newest understanding of atomic makeup in the Electron Cloud Model better represents observed atomic phoneme since the Bohr model rose to prominence.
Answer:
Electron cloud model
Explanation:
Are strong acids more readily attracted to strong bases than to weak bases?
butter melting on warm pancakes is
conduction
convection
radiation
butter melting on warm pancakes is convection
The following information should be considered:
Since convection is the movement arise within a fluid by the tendency of hotter and therefore less dense material to rise,.Moroever, it is colder, denser material to sink under the impact of gravity, that leads in transfer of heat.learn more: https://brainly.com/question/2514933?referrer=searchResults
An obligation to do something or control over or care for someone.
Answer: a responsibilty
Explanation:
An obligation to do something or control over or care for someone. The word suitable for it is "responsibility".
An obligation is a duty or responsibility to do anything that is required by law, custom, or moral standards.
Responsibility is an obligation to do something or control over or care for someone. It is a duty or task that one is required to undertake.
Responsibility can be of different forms, such as personal, social, or professional.
Personal responsibility refers to the responsibility that an individual has for their own actions and decisions.
Social responsibility refers to the responsibility that an individual or organization has to act in the best interest of society.
Professional responsibility refers to the responsibility that individuals have to perform their job duties to the best of their ability.
Therefore, the term most suits for the given statement is "responsibility".
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PLZ ANSWER QUICK PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
Answer:
D. Atom, Electron, and Proton
Explanation:
Because Atoms are the smallest and they make up everything.
because the Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.
Answer:
C
Explanation:
Electrons are the smallest part of matter. Protons are bigger than electrons. And the whole atom is bigger than everything inside it.
What is The tough and water-resistant layer of the skin where cells are filled with keratin.
what is the ion name of Zinc?
Answer:PubChem CID: 32051
Explanation:Molecular Formula: Zn+2
Synonyms:
zinc ion
zinc(2+)
Zinc cation
Zinc, ion (Zn2+)
Zn2+
More...
Molecular Weight:
65.4 g/mol
Dates:
Modify:
2020-10-20
Create:
2005-06-08
Define matrer?
a)Electrical conductivity
b)Anything that takes Iness and space
c) Something that doesn't take up space.
Answer:
if you are asking matter then
Explanation:
Matter is defined as anything that has mass and takes up space (it has volume).
What are the physical properties of chlorine?
Answer:
The Physical Properties of Chlorine are as follows:
Color: Greenish-yellow.
Phase: Gas.
Odor: Disagreeable, suffocating smell.
Density: About two and one-half times as dense as air.
Solubility: Is soluble in water. ...
Boiling Point: The boiling point of chlorine is –34.05°C.
Melting Point: The melting point is –101°C.
Explanation:
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