Answer: Chlorine Oxide
Explanation:
What is the physical composition of our
air? What types of things is our air made
up of? Describe what it may look like, its
size, etc.
Answer:
Air is mainly a mixture of two gases.
Explanation:
Air is mainly a mixture of two gases, nitrogen (around 78%) and oxygen (around 21%). It also contains carbon dioxide (around 0.03%), noble gases (around 0.9%), water vapour and a very small amount of other kinds of gases. Air makes up the atmosphere, which is essential for life on Earth.
(FYI, argon has the highest percentage of composition among the noble gases)
If you are correct you get a brainless
(07.01 MC)
As a part of the life cycle of plants, the plant must begin with an embryo. What statement best describes where the embryo can be found in flowering and non-flowering plants? (2 points)
I can be formed into a sheet, I am high in luster, and am a very good conductor. I must be a ...
a
metal
b
nonmetal
c
metalloid
d
noble gas
Answer: metal
Explanation:
hey pleaseeeeeeeeeeeeeeeeeeeeeeee
Answer: B
Explanation:
Answer:
b
Explanation:
if you are correct you get a brainless
Tarek would like to germinate pumpkin seeds for his science project. He wraps the seeds in a dry paper towel and places them on the windowsill. Tarek waits, but the seeds will not grow. What conditions should Tarek have used to germinate the seeds? (2 points)
a
The paper towel should be wet, and the seeds should be placed in a dark place.
b
The dry paper towel should be placed in a pot filled with soil.
c
The paper towel should be dry and transparent.
d
The seeds should be placed in a dark place.
Answer:
A.
Explanation:
❤️
Answer: it’s A. The paper towel should be wet, and the seeds should be placed in a dark place.
Explanation: I hope this helps!
What is the overall charge of an ion that has 11 protons, 13 electrons and 12 neutrons?
Answer:
+1
Explanation:
To calculate the charge on an ion, we simply use the number of protons and electrons. Protons are the positively charged subatomic particles. The electrons are the negatively charged particles in an atom.
When the number of protons are greater than that of electrons, the ion is positively charged.
When the number of protons are lesser than that of electrons, the ion is negatively charged.
When the number of protons and electrons are equal, the ion is neutral.
Answer Below and top
Charge = Protons - Electrons = 11 - 10 = +1
Have a good day and plz mark me brainliest!!
Answer:
-2
Explanation:
Which details from “When Volcanoes Erupt” would be important to include in a summary of the text? Select three details.
A.
Floods can be very dangerous and can destroy towns.
B.
Many animals can sense a natural disaster is coming.
C.
Scientists can make predictions that keep people from being in danger when volcanoes erupt.
D.
There are volcanic eruptions every year.
E.
Volcanic eruptions are natural processes, even though they can be deadly.
The important details that should be present in summary of the “When Volcanoes Erupt” are Many animals can sense a natural disaster is coming, Scientists can make predictions that keep people from being in danger when volcanoes erupt and Volcanic eruptions are natural processes, even though they can be deadly.
What is volcanic eruption?It is a natural disaster, in which gases and lava comes from the volcano in the explosively manner.
Many animals have sense of vibrations that are generated during the natural disaster and may run from that place. Scientists also do prediction about natural disasters by studying geographical changes and may help people from danger.
Hence options (B) , (C) and (E) are correct.
To know more about natural disasters, visit the below link:
https://brainly.com/question/356938
All systems disperse their energy spontaneously?
Is it true or false? and WHY?
Answer:
True.
Explanation:
Yes, all systems disperse their energy spontaneously because all types of energy spontaneously flows from concentrated to dispersed if it is not hindered by any material in their way. Energy can be prevented from spreading by materials such as containers. If there is no substance in the path of energy so it can disperse automatically from a concentrated region to a lower region.
A solution of pH 7 has
Group of answer choices
the same concentration of H+ and OH‑
more OH- than H+
no H+ and no OH-
more H+ than OH-
Answer: same concentration
Explanation:
H+ makes it more acidic, OH- makes is more basic. 7 is neutral so it has the same amount of both.
When you produce a current/electron flow through a copper wire with a generator; the wire itself carrying the current (electron flow) also produces
a magnetic field.
True or false ?
There are two reactants
in a chemical equation
and one product. The
mass of the product is
30g. The mass of the
first reactant is 17g.
What must the mass of
the second reactant be,
if the equation is to
follow the law of
conservation of mass?
PLEASE HELP ME
Answer:
13g
Explanation:
The law of conversation of matter tells us that in a chemical reaction, matter is never created or destroyed, it's simply converted from one form to another. So the mass of reactants should always equal the mass of the products in a chemical reaction.
Therefore, if the total mass of the products is 30g, that means that the reactants have a mass of 17g + the other reactant to = 30g.
30g - 17g = 13g
9. The pH of an acidic solution is
A) greater than 14.
B) greater than 7.
C) less than 0.
D) less than 7.
Answer: d
Explanation:
HELPP ILL GUVE YOU LOTS OF POINTS EVERYTHING U WANT I REALLY NEED HELP
Answer:
To make this easier I'll label the left column 1, 2, 3, and 4. and the right column A, B, C, and D.
1 goes to B
2 goes to A
3 goes to C
4 goes to D
Explanation:
1. A ship goes out of sight on the horizon because it goes too far around the curve of the earth to see anymore.
2. We have day and night because the earth spins certain sides of itself to face the sun and other sides to face away from the sun (aka day and night)
3. We have summer and winter because Earth's axis is tilted. Part of the Earth tilts closer to the sun when summer is here, and the other part tilts away from the sun when it's winter. (This is why it's summer in North America, when it's winter in Australia).
4. A year is measured by how long it takes a planet to orbit it's star. A year for Earth is 365 days because it takes 365 days for earth to orbit around the sun.
HELP ME PLEASE (brainliest)
Answer: i would say D or the last one.
Explanation: According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
Hope this helps :) Can u plz mark me branliest
A block of concrete has a mass of 5100 g and a volume of 2500 cm3 . Calculate the density.
Answer:
2.04 g/cm3
Explanation:
Density = mass ÷ volume
= 5100 ÷ 2500
=2.04 g/cm3
2. A tow-line with a tension of 1200 N at 35° is needed to tow the 1350 kg
trailer at a constant speed. What is the uk?
Answer:
i don't know
sorry i would help but i don't know
Explanation:
GIVING 38 POINTS AWAY PLEASE HELP ME WITH BOTH QUESTIONS!!!!
Answer:
C
B
Explanation:
throwing cotton balls causes the person to blink.
and Its not an allergic reaction so it's more of stomach pain that sneezing
Answer:
it should be c for the first one then b for the second one
Explanation:
hope it helps :)
The dividing line________ the mantle and the crust.
Please help due tomorrow.
This is a fill in the blank
Answer:
The dividing line between the mantle and the crust.
in the reaction 2Na + CI2 --> 2NaCI the products are
Answer:
The products in this equation are CI2
Explanation:
The reasoning as to why the CI2 is considered the products is because it is on the right side of the plus sign, and on the left side is called reactants.
The molar mass of CO2 is 44g/mol. How many grams are in 3 mol CO,?
Answer:
We assume you are converting between moles CO2 and gram. You can view more details on each measurement unit: molecular weight of CO2 or grams This compound is also known as Carbon Dioxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CO2, or 44.0095 grams.
Answer:
Assuming the question was about 3 mol CO2 - it's 132g. Assuming it's about CO - it's 84g.
Explanation:
The molar mass of X means "a mole of X weighs that".
So 1 mol CO2 weighs 44g, so 3 moles will weigh three times that - 132g.
Now, with CO, we need to compute the molar mass of CO. One particle of CO is comprised of 2 atoms - a Carbon atom and an Oxygen atom, with molar masses ~12g and ~16g respectively. That brings us to molar mass of CO of 28g and the mass of 3 mol CO of 28g*3 = 84g
Which of the following is a unit of mass?
A.
newton
B.
kilogram
C.
meter
D.
tesla
Answer:
B. kilogram
Explanation:
The basic SI unit of mass is the kilogram.
:))
<3
Does anyone know the ones that are blank
Answer:
yeah whats it asking for
Explanation:
Describe what a phase diagram is
Answer:
The graph which shows under what conditions of temperature and pressure distinct phases of matter occur is called phase diagram.
IF ANSWER I WILL GIVE BRAINLESS
Question 9 (4 points)
If the 2nd Level consumers had 10 joules of energy in this food chain, how much energy was at the producer level?
Question 10 (4 points)
Why doesn't the total amount of energy from the producers make it to the owl? What evidence supports your answer?
Answer:
Answer 9 - 100 joules energy was at the producer level
Answer 10 - Remaining energy is used in metabolism
Explanation:
Answer 9
The energy at each trophic level is only 10% of the energy at its previous trophic level.
The energy at producer level is X
[tex]10[/tex] % of [tex]X = 10[/tex] Joules
[tex]\frac{10}{100} * X = 10\\X = 100[/tex]Joules
Answer 10
Because the remaining 90% energy is utilized by the producer for its metabolism
In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 11.0 grams. What is his percent yield?
Answer:
Option D.
Explanation:
Percentage yield = Actual yield / Theoretical yield * 100%
Actual yield = 11.0 grams
Theoretical yield = 12.3 grams
Percentage yield = 11.0 / 12.3 * 100
Percentage yield = 89.43%
what is on the left side ?
Answer:
reactants
Explanation:
Please help me solve this question. Tell the method too
The answer is - 4 thats the charge of Si O
⁴ ¹0
How many moles are in 1.51 x 10^24 molecules of water?
Answer:One mole of HBr has 6.02 x 1
0
23
molecules of HBr.
1 mole of HBr = 6.02 x 1
0
23
molecules of HBr.-----(a)
X mole of HBr has 1.21 x
10
24
molecules of HBr.
X mole of HBr = 1.21 x
10
24
molecules of HBr------(b)
Taking ratio of (a) and (b)
X / 1 = 1.21 x
10
24
/ 6.02 x 1
0
23
X= 2.009 moles.
Explanation:
Use the equation for the combustion of butane: 2 C,H, + 13 0,8 CO, +10 H,O 4. If you had 99.08g of butane react, how many grams of carbon dioxide would be produced? 5. If you had 290.38 grams of butane, how many grams of water would be produced? 6. How many grams of oxygen gas are needed for the complete combustion of 307.47 grams of butane? 7. How many grams of oxygen would be required if you had 160.87 grams of butane?
Answer:
See explanation
Explanation:
Equation of the reaction;
C4H10 + 13/2 O2-----> 4CO2 + 5H2O
Number of moles of Butane = 99.08g/58 g/mol = 1.71 moles
1 mole of Butane yields 4 moles of CO2
1.71 moles of Butane yields 1.71 * 4 = 6.84 moles Of CO2
Mass of CO2 = 6.84 moles Of CO2 * 44 g/mol = 300.96 g
5. Number of moles of butane = 290.38 g/58 g/mol = 5 moles
1 mole of butane yields 5 moles of water
5 moles of butane yields 5 * 5 = 25 moles of water
Mass of water = 25 moles of water * 18 g/mol = 450 g of water
6. Number of moles of butane = 307.47g/58 g/mol = 5.3 moles
1 mole of butane reacts with 6.5 moles of oxygen
5.3 moles of butane reacts with 5.3 * 6.5 = 34.45 moles of oxygen
Mass of oxygen = 34.45 moles of oxygen * 32 g/mol = 1102.4 g
7. Number of moles of butane = 160.87/58 g/mol = 2.8 moles
1 mole of butane reacts with 6.5 moles of oxygen
2.8 moles of butane reacts with 2.8 * 6.5 = 18.2 moles of oxygen
Mass of oxygen = 18.2 moles of oxygen * 32 g/mol = 582.4 g
The products of a chemical reaction are chemically different substances than the reactants of a chemical reaction.
True or false?
this statement is true
Answer:
Hope it helps u