Answer:
0.206M
Explanation:
Molarity, which refers to the molar concentration of a substance can be calculated using the formula as follows:
Molarity (M) = number of moles (n) ÷ volume (V)
According to the provided information, mass = 6grams, volume = 0.5L
Since molar mass of NaCl = 23 + 35.5
= 58.5g/lol
Mole = mass/molar mass
Mole = 6/58.5
Mole = 0.103mol
Hence;
Molarity = 0.103/0.5
Molarity = 0.206M
What kind of machine allows a single sailor to turn an entire ship with the ship's wheel, and how does it work?
Answer:
The ship's wheel is an example of a wheel and axle. It creates a mechanical advantage for the sailor because she can apply a small force over a large distance by turning the big ship's wheel.
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A ring of pure gold has a mass of 17.3 grams. How many atoms of gold are in the ring?
Answer:
5.29936 x 10^23 atoms
Explanation:
To do this, we need to find the number of moles in the ring so that we can then multiply that by Avogadro's number (6.022×10^23).
equation for finding moles: [tex]n = \frac{mass}{M_{r} }[/tex]
substitute in the known values: [tex]n = \frac{17.3}{197 }[/tex]
divide to find the value of n: 0.088 mol
Multiply by Avogadro's constant: 0.088 x 6.022 x 10^23
= 5.29936 x 10^23 atoms in the ring.
hope this helps!
According to Avogadro's number, there are 5.289×10²² atoms of gold in 17.3 grams of ring.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
In the given problem, number of atoms of gold is found out as, number of atoms=17.3/196.966×6.022×10²³=5.289×10²² atoms.
Thus, there are 5.289×10²² atoms of gold in the ring.
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A student need to predict the mass of a block of aluminum. The block is 4.23 cm on all sides and the density of aluminum is 2.7 g/cm3. What will the mass of the block be?
volume of 5.2 X 10^26 molecules of CH4
Answer:
19348.84 L
Explanation:
At STP, we know that;
6.02 × 10^(23) molecules = 22.4 L
Therefore, 5.2 × 10^(26) molecules = 5.2 × 10^(26) × 22.4/(6.02 × 10^(23)) = 19348.84 L
Thus, volume of CH4 with 5.2 X 10^26 molecules is 19348.84 L
In naming the compound PCl5, the prefix used with the second element is ____________________.
Answer:
[tex]\boxed {\boxed {\sf Hepta}}[/tex]
Explanation:
We are given the formula:
[tex]PCl_5[/tex]
This is a molecular formula, because it contains nonmetals.
1. Name the first element
The first element is phosphorous (P). Since this is the first element and there is only one, we don't need a prefix.
Phosphorous2. Second element
The second element is chlorine (Cl). It has a subscript of 5, so we must add the prefix of hepta-.
Phosphorous heptachlorineAdd the ending of -ide.
Phosphorous heptachlorideThe prefix used for the second element is hepta. The compound name is phosphorous heptachloride.
A(n)_______ contains two or more substances that are not chemically combined. (pic down below)
The .......................................................... Is related to its tendency to give away electrons and form positive ions
Answer:
electropositivity or metallic character.
The ability of an atom to give away electrons and form positive ions i.e cations is known as electropositivity or metallic character.
When you name a binary compound, you have to add____ to the ending of the second element in the compound.
A) -ate
B) -ide
Answer:
B - ide
Explanation:
The electronegative of phosphorus is
What can air pollutants do?
Answer:
Air pollution can also cause headaches, dizziness, and nausea. ... Long-term health effects from air pollution include heart disease, lung cancer, and respiratory diseases such as emphysema. Air pollution can also cause long-term damage to people's nerves, brain, kidneys, liver, and other organs.
Explanation:
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Hi, I really need help, my mental health is horrible right now and I can’t do any work, and I really just need help answering these questions because I really don’t want to get bad marks but I don’t have the motivation to do anything, thanks so much!
What is the noble gas electron configuration for the element oxygen?
[He] 2s² 2p⁴
Explanation:
just look it up
Answer:
[He] 2s² 2p⁴.................
Please help due today!
Answer:
the answer is b
Explanation:
Please help due today!
Answer:
It's the first answer choice for sulfur and the second answer choice for magnesium I believe
how many different bases of DNA
Answer:
four
Explanation:
adenine, thymine, guanine, and cytosine
Explain what the periodic table is and how it's organized
Answer:
The periodic table is a set of elements organized by their atomic number, from lowest (hydrogen 1) to highest (oganesson 118). That number is the amount of protons in the nucleus of an atom of the element. The table is split into three groups of elements (metals, nonmetals and metalloids). As you go down the table the elements are more reactive.
Explanation:
^^
What is the correct order for the seasons of winter, spring, summer, and fall in the Northern
Hemisphere?
Answer:
Therefore, for temperate areas in the northern hemisphere, spring begins on 1 March, summer on 1 June, autumn on 1 September, and winter on 1 December. For the southern hemisphere temperate zone, spring begins on 1 September, summer on 1 December, autumn on 1 March, and winter on 1 June.
Explanation:
The correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
What is season?A season is a subdivision of the calendar year based on variations in the local climate, ecology, and amount of daylight hours. The axial parallel of Earth's inclinator orbit of the Sun causes seasons on Earth.
Seasons are distinguished by differences in the amount of sunlight reaching Earth's surface in temperate as well as polar areas. These fluctuations may lead certain animals to migrate or go into hibernation while others may cause vegetation to fall dormant. The correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
Therefore, the correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
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A compound that releases hydroxide ions in solution would most likely have which chemical property? 1.It would react with lipids to form soap. 2.It would react with metals to form a salt and water. 3.It would react with metals to form hydrogen gas. 4.It would react with carbonates to form carbon dioxide.
Answer:
1
Explanation: bases do not react with metals or carbonates
Answer:
A
Explanation:
I did the test and that's the correct answer
I NEED THE ANSWER ASAP IM ON A TIMER
Can someone please help me with the with this
Answer:
Chemical
Explanation:
How is a chemical equation different from a chemical formula?
Answer:
Explanation:
A chemical formula is the combination of atomic symbols that designate a particular chemical compound, or a substance with two or more different elements. The formula shows which type and how many of each element makes up that specific compound
Two balloons are given an electrostatic charge by rubbing them with a wool cloth. Which observation provides evidence of the force that the balloons exert on each other over a distance because of their charge?
Answer:
C. Moving Balloon 1 can make Balloon 2 move without the balloons touching.
Explanation:
When two balloons are rubbed with a wool cloth, they get electrostatic charge and both become negatively charged.
If both balloons will be place close together, balloon 1 will push the balloon 2 far from itself without touching it as they both are negatively charged and things with same charges repel each other.
Hence, the correct answer is "C. Moving Balloon 1 can make Balloon 2 move without the balloons touching."
Look at the graph
below.
Write a paragraph
describing a scenario
that this graph would
be true for.
Hurry & I’ll mark you brainliest GIVING POINTS TO ANYONE WHO HURRIES
Answer:
a item dropping
Explanation:
KE is movement and PE is height. As it's falling it gets KE and falls downward giving it more KE and less PE
Answer:
Explanation:
Trana make us pay for da answer smh
The most penetrating form of radiation is __ radiation.
a. alpha
b. beta
c. positron
d. gamma
Answer: gamma. it is extremely deadly to living tissue
Explanation:
Ecosystems are constantly _______________ (changing, remain the same) in the ________________ (same, different) ways over time.
Answer:
changing
different
Explanation:
Can someone please help me with this, ill give you a heart, a 5 star rating, and the brainliest answer!
How can global warming and climate change be addressed to prevent these extreme conditions.
Plzzzzzzzz helppppppop
Answer:
you can ride a bus, ride a bike, or walk to prevent greenhouse gasses from entering the atmosphere causing global warming and climate change
Explanation:
Answer:
One way that can be very helpful is finding a way to capture carbon and bad fumes from the atmosphere which Elon Musk is offering 100 million dollars to whoever can find a way to do it !
Explanation:
Which is true of synthesis and decomposition reactions
Complete question is;
What is true of synthesis and decomposition reactions?
A) Synthesis reactions require more energy than decomposition reactions.
B) Synthesis reactions produce more products than decomposition reactions.
C) Synthesis reactions are the opposite of decomposition reactions.
D) Synthesis reactions have fewer reactants than decomposition reactions.
Answer:
C) Synthesis reactions are the opposite of decomposition reactions.
Explanation:
Correct answer is option C. This is because, Synthesis reactions are defined as those whereby substances are combined together to form larger molecules/compounds. Whereas, decomposition reactions are the opposite due to the fact that they involve the breakdown of two or more substances.
Your classmate is viewing a sample using high power and is about to refocus using the coarse adjustment knob. What would you recommend your classmate do and why?
Answer:
Using the coarse adjustment knob of the microscope in high power may lead to the breaking of the slide if adjusted and raised the slide too much which can damage the sample as well as the high power lens.
In this case, I would recommend using the fine adjustment knob and moving away from the end of the viewing area of the microscope so there would no collision take place. The fine adjustment will help to get a clear image.
Which process uses the least amount of material to create electricity, coal or uranium, coal or nuclear power plant?
Answer:
nuclear power plant
Explanation:
Generation of electricity often involves the use of some kind of material or energy that is consumed as electricity is generated. There are various ways of generating electricity such as;
By burning coal
Use of a radioactive element as nuclear fuel
From wind energy
From water
From the sun, etc
Each process involves the intake of material or energy. The process that goes on in a nuclear power plant requires a radioactive fuel of which uranium is an example.
A nuclear plant uses the least amount of material (such as only 1g of uranium fuel) in electricity generation compared to the tons of coal burnt in order to generate electricity.