Answers
Answer:
it is a. i know I am right.
Explanation:
Related Questions
The electronegative of phosphorus is
Answers
2.19
Explanation: I searched it up
how many different bases of DNA
Answers
Answer:
four
Explanation:
adenine, thymine, guanine, and cytosine
In naming the compound PCl5, the prefix used with the second element is ____________________.
Answers
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.
Ecosystems are constantly _______________ (changing, remain the same) in the ________________ (same, different) ways over time.
Answers
Answer:
changing
different
Explanation:
1 changing
2 same
Explanation: eco systems are something that animals an insects adapt to an live in so if there is a change in weather or whatever it may be ecosystems are always changing
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?
Answers
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.
What type of elements are in s-block
Answers
1. Alkali earths metals.
2. Alkaline earths metals.
2 Exceptions are Hydrogen and helium gas.
Examples: Sodium, potassium, francium, beryllium, magnesium... etc
I NEED THE ANSWER ASAP IM ON A TIMER
Answers
Please help due today!
Answers
Answer:
the answer is b
Explanation:
How can global warming and climate change be addressed to prevent these extreme conditions.
Plzzzzzzzz helppppppop
Answers
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:
Can someone please help me with this, ill give you a heart, a 5 star rating, and the brainliest answer!
Answers
What is the mass of the ethanol that exactly fills a 200.0 mL container? The density of ethanol is 0.8 g/mL. please help
Answers
Mass =volume x density = 200.0 mL x 0.8 g/mL= 160.0 g
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
Answers
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
You have a stomach-ache and determine that your stomach is too acidic. Which of the
following medications would you take and why? Use a model to explain your choice?
(Attach your model to the next question.)
1. weak acid
2. strong acid
3. weak base
4. strong base
Answers
Answer: you would use a weak base, as you want to combat acidity but do not want to damage your stomach. an example is tums™ which use carbon carbonate, a base.
Hope this helps, and if it did mind marking me brainliest? thanks >//-//<
1. Write the chemical formula for slacked lime
2. Give the molecular and structural formulae of ethane
Solve both plz and helpppp me
Answers
Answer:
cl+ms=ClMs
Explanation:
just add them together it aint right btw
Explain what the periodic table is and how it's organized
Answers
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:
^^
During which state of matter does temperature increase the most?
Answers
Answer:
Gases
Explanation:
Gases have the highest kinetic energy of any state of matter and thus occur at the highest temperatures. Increasing the temperature of a gas in an open system will not further change the state of matter because the gas molecules will only become infinitely further apart.
Answer:
Gas
Explanation:
There are many forms in which temperature increases, for example sublimation, (solid to gas) which is essentially vaporization which happens during a sub-like gas phase concluding the answer to gas.
A(n)_______ contains two or more substances that are not chemically combined. (pic down below)
Answers
Hope this helps!!!!
Reason: It is not elements because an element is a single atom. It is not compound because in a compound two elements are chemically combined.
HELP!!GIVING BRAINLIEST!! TIME SENSETIVE!!!
Here are some basic lab safety rules. Read through them and write at least a page. THEY ARE OBVIOUSLY ALL IMPORTANT...GO INTO DETAIL ABOUT A FEW AND ELABORATE ON THEIR IMPORTANCE.
Know locations of laboratory safety showers, eye wash stations, and fire extinguishers. The safety equipment may be located in the hallway near the laboratory entrance. Know emergency exit route.
Answers
Answer:
wait so what am I supposed to do
Answer:
Explanation:
Knowing locations of laboratory safety showers is important because you could have spilled some dangerous chemical on your skin. Knowing where the eye washing stations is important if you get something dangerous in your eyes. Knowing where the fire extinguisher is also important because if there is a fire and you cannot evacuate, you have a good chance of putting it out with the fire extinguisher. Knowing the emergency exit route is important because if there is a fire or something along those lines, you need to evacuate as soon as possible and not be searching for exits, you should be on the move.
Please help due today!
Answers
Answer:
It's the first answer choice for sulfur and the second answer choice for magnesium I believe
What is the noble gas electron configuration for the element oxygen?
Answers
[He] 2s² 2p⁴
Explanation:
just look it up
Answer:
[He] 2s² 2p⁴.................
Please help- D;
.
.
.
.
.
Answers
Answer: Silicon dioxide
Explanation:
di is 2 and since oxygen is 2
If you travel at 10m/s how much time would it take to travel a distance of 542 meters?
Answers
Answer:
The answer is 54.2 seconds
Explanation:
If you divide 542 by 10 you get 54.2 which is then labeled as seconds.
The most penetrating form of radiation is __ radiation.
a. alpha
b. beta
c. positron
d. gamma
Answers
Answer: gamma. it is extremely deadly to living tissue
Explanation:
What kind of machine allows a single sailor to turn an entire ship with the ship's wheel, and how does it work?
Answers
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.
(please mark brainliest if it's correct <33)
For the reaction 2NH3(g) + O2(g) -> 2NO(g) + 3H2O(g). The reaction is run using 824 g NH3 and excess oxygen. How many moles of NO are formed? How many moles of H2O are formed?
Answers
Answer:
Explanation:
Step One
Find the molar Mass of NH3
N = 14
3H = 3
Mass = 17
Step Two
Find the number of moles of NH3
mols = given mass / Molar Mass
given mass = 824 grams
molar mass = 17
mols = 824/17
mols = 48.47
Step Three
Find the moles of NO
Here you have to look at the balanced equation
Every 2 mols of HN3 produces 2 mols of NO
So the number of mols of NH3 = 48.47
The number of mols of NO = 48.47
Step Four
Find the mols of H2O
2 mols of NH3 produces 3 moles of H20
48.47 mols H20 produces x moles of H20
3/x = 2/48.47 Cross Multiply
2x = 3*48.47
2x = 145.41 Divide by 2
x = 145.41/2
x = 72.71 mols of water.
describe the relationship between the amount of C-15 and time?
Answers
Answer:
As time increases, C-15 (Carbon) decreases. During radioactive decay, the amount of Carbon in a substance undergoes half-lives (A sample could have a half life of 1002 years, for example.) When that substance ages to that timeframe, it loses half of its mass. Then for the next half-life, it loses half of that new mass, and so on.
TRUE OR FALSE: pH measures the amount of hydrogen or hydronium in water
Answers
Answer:
True
Explanation:
test help
What charge would Ca have in CaI2
A) 1+
B)2+
C)1-
D)2-
E) Calcium would not have any charge
Answers
i took this test
what is the lewis dot structure for Cu2S
Answers
Answer:
LOL i belive its 200 because i did this exact same thing yesterday for homework and got it right so yeah, it should work. if it doesnt im sorry! but yeah XD sub to my yt channel too! DB_PLAYS <3
Explanation:
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?
Answers
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."