Answer:
1.57 x 10⁷m
Explanation:
Given quantity is;
1.57 x 10¹⁴nm
Now;
1 nm = 10⁻⁹
So, let us convert this given quantity;
1 nm = 10⁻⁹
1.57 x 10¹⁴nm will give 1.57 x 10¹⁴ x 10⁻⁹ = 1.57 x 10⁷m
The data table shows the number of pumpkin seeds that
germinate at different temperatures.
Effect of Temperature on Germination of Pumpkin Seeds
Temperature
Seeds germinated
Trial 1 Trial 2 Trial 3 Tral 4
60 63 70 62
75 87 82 78
20°C
24°C
28°C
86
84
84
32°C
69
64
63
66
What is the mode of the data at 28°C?
O A. 84.25
OB. 84
O C. 83.5
O D. 85
Answer:
Its B
Explanation:
Please help. I’m really struggling. No wrong answers please, if you don’t know it please don’t answer, I’m already failing the class.
Answer:
[tex]C_{3}H_{3} O_{1}[/tex]
Explanation:
There are empirical formula calculators on the search engine that starts with G (This word is blocked by Brainly) and if you really need to use it, there's an option you can choose. However, I will try to explain this.
C = 65.4
H = 5.5
O = 29.1
We first need to divide the percentages by their molar mass.
65.4/12.01 = 5.44
5.5/1.008 = 5.46
29.1/16 = 1.8
We then need to divide these numbers by the smallest number we obtained.
1.8 is smaller than 5.46 and 5.46, so we would divide all three numbers with 1.8.
5.44/1.8 = 3
5.46/1.8 = 3
1.8/1.8 = 1
This means that there are 3 atoms of C and H and 1 atom of O, giving us the empirical formula of [tex]C_{3}H_{3} O_{1}[/tex].
what are 2 chemical changes of water?
For problems 1-6, find the average atomic mass of the following mixtures of isotopes. Show your work for full credit. Iodine-127 (80%), Iodine-126 (17%), Iodine-128 (3%)
Answer:
126.86
Explanation:
Iodine-127 (80%)
Iodine-126 (17%)
Iodine-128 (3%)
For a mixture of isotopes, the average atomic mass is obtained by summing the multiplication of the atomic mass and percentage composition of the individual isotopes. This is given as;
Average Atomic Mass = ( 80 / 100 * 127) + (17 / 100 * 126) + (3 / 100 * 128)
Average Atomic Mass = 0.8 * 127 + 0.12 * 126 + 0.03 * 128
Average Atomic Mass = 101.6 + 21.42 + 3.84 = 126.86
I thought heavy elements like iron & gold were dense & sank into the interior of the molten planet? How did gold get on top of the less dense crust?
Answer:
If it is denser then water it shall float but if water has a higher density the object sinks
Explanation:
Moving electrons are known as ______.
Answer:
Electricity
Moving electrons are known as electric current, also known as Electricity.
What is the percentage yield if 125.4g C3H8 are collected from a reaction that should produce 157.4g C3h8?
A. 58.3%
B. 79.2%
C. 44.2%
D. 26.3%
The percentage yield : 79.67%
The closest answer is option B.
Further explanationGiven
125.4 g C3H8
157.4 g C3H8
Required
The percentage yield
Solution
Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated
General formula:
% yield = (actual yield : theoretical yield) x 100%
Input the value :
% yield = (125.4 : 157.4) x 100%
% yield = 79.67
gold is one of the group Metals called the coinage metals. how many atoms of gold are in a u.s. eagle a gold alloy bullion coin with a mass of 31.1 g Au?
Answer:
9.51 x 10²² atoms Au
Explanation:(mass: 31.1g Au)
(m. mass: 196.967 g/mol Au)
(atoms: ?)
(31.1g Au x 1 mol Au x 6.022 x 10²³ atoms Au/ 196.967g Au x 1 mol Au)
Give the missing product Mg + Fe1Cl3 ---> Fe + _?_
The missing product : MgCl₂
Further explanationGiven
The reaction between Mg and FeCl₃
Required
The missing product
Solution
This reaction is a single replacement reaction
Occurs when one element replaces another element in the compound. The more active element will replace the less active element. The activity of this element can be seen from the voltaic series
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au
Mg is located to the left of Fe in the voltaic series so that it can replace Fe from its compound
General formula :
A + BC ⇒ AC + B
So the reaction :
3Mg + 2FeCl₃ → 2Fe + 3MgCl₂
In what situation can energy be created or destroyed?
1. in a nuclear reaction
2. during photosynthesis
3. never
4. when work is done
When water forms beads on a surface, as it does on the hood of a freshly waxed car, we can say that the water is ________ its contact with the surface because the cohesive forces are _______ than the adhesive forces.
Answer:
When water forms beads on a surface, as it does on the hood of a freshly waxed car, we can say that the water is minimizing its contact with the surface because the cohesive forces are larger than the adhesive forces
Explanation:
A waxed car's surface is covered wax which is an hydrocarbon having long chains that are very hydrophobic and therefore there is little interaction between the surface covered in wax and the cohesive forces in the water is much larger than the adhesive forces between the water and the freshly waxed car's surface which makes the water bead up to minimize the contact surface with the car's metal surface that results in limiting of the rust.
Chemical compounds will form so that each atom, by gaining, losing or sharing electrons, will have their highest occupied energy level filled is called the
Answer:
it is nobel gas arrangement electronic configuration it become stable
To make a Br2 bond, how many total valence electrons are required?
1. 7
2. 14
3. 8
4. 16
Answer:
2. 14
Explanation:
To form Br₂ bond, a total of 14 electrons are needed.
Bromine is an element in the 7th group on the periodic table. It has 7 valence electrons.
In forming the bromine gas, the two atoms of bromine shares 7 electrons each. These electrons are from their outermost shell. The outermost shell is the valence shell. So, two atoms donating 7 electrons gives 14 electrons.Most of the energy that drives the water cycles comes from which of the following?
O The sun
O Earth's core
O Earth's oceans
O The equator
What do you have to do to change an atom labeled + ion or - ion into a neutral atom?
Answer:
to change an atom labeled + ion or -ion into a neutral atom, an electron is either added or removed from it
Which of these is not an example your body maintaining homeostasis?
A
When exercising, your body releases more energy to your muscles.
B
On a hot summer day, you produce sweat.
C
When you get a virus, your body systems react to fight it.
D
When you see a piece of cake, your mouth waters.
Answer:
D
When you see a piece of cake, your mouth waters.
Explanation:
Homeostasis refers to the self-regulating processes in the human body to maintain stability and survival.
The example of homeostasis that does not occur in the body is:
Option D. When you see a piece of cake, your mouth waters.
The examples of homeostasis in the body are:
The body releases more energy to the muscles during exercises as the movement of muscles is required to main body temperature.Sweating is the process in which salt-based fluid or water is released from the body. It occurs to maintain the stable equilibrium and regulation of temperature. The immune system is tightly involved in the stability and survival of an organism. When a pathogen enters the body, the fighting cells will eliminate the pathogen maintain a normal physiological condition. The process of salivation is a part of digestion in the human body. It is not an example of homeostasis.Thus, the correct answer is Option D.
To know more about homeostasis, refer to the following link:
https://brainly.com/question/9087319
Lithium has two stable isotopes, lithium-6 and lithium-7. The atomic number of lithium is 3. Explain how the two are the same and how they are different.
Explanation:
The two isotopes of lithium given are similar in the sense that they have the same atomic number which is 3.
Every kind of an atom of an element have the same atomic number. Atomic number is the number of protons in an atom.
The atoms are different in that they have different mass number because the number of protons they contain are different.
So for isotopes;
They have the same electronic configurationThey have similar chemical propertiesBut their masses differsTheir abundance in nature also differs.HELPPP PLEASE TIME LIMITED!!!
give reason joule is a derived unit
Joule is a derived unit as, J = Nm, and N = kg m/s². So, joule depends upon many such physical units and hence, it is a derived unit.
More:-
Derived units: Units which are dependent on other physical units are known as derived units. Ex: acceleration (a), velocity (v). Fundamental units: Units which do not depend upon other units. Ex: cd (candela), kg (kilograms), etc.Why is it helpful to cross my organisms
A test cross can help determine whether a dominant phenotype is h.o.m.o.zygous or heterozygous for a specific allele.
hope this helps ^^
Calcium hydroxide reacts with Hydrogen nitrate to form Calcium nitrate and Dihydrogen monoxide.
Answer:
Ca(OH)2 + HNO3 = Ca(NO3)2 + H2O | Chemical reaction and equation.
How many moles are there in 1.20x10^24 units of Platinum?
Answer:
#50316 in Other Chemistry for Meagan
How many moles of glucose does 1.2 x 1024 molecules represent? 1 mole of any substance has 6.02 x 1023 . For getting thenumber of moles we can divide 1.2 x 1024/6.02 x 1023 and we receive 2 moles.
Using the model for the formation of Scandium Fluoride (an ionic compound), write the chemical formula.
Answer:
Sc3F3
I hope its help for you
1. What atoms make up a molecule of acetic acid? *
O carbon, sodium, oxygen
sodium, hydrogen, carbon
carbon, hydrogen, oxgyen
sodium, hydrogen, oxgyen
Answer:
carbon,hydrogen and oxygen
molecular formula=CH3COOH
plsssssssssssssssssssssssssssss help
Answer:
a. compound; anion + anion
b. ionic; cation + anion
c. ionic; cation + anion
d. compund; anion + anion
how do i get the area of a shape
variable for momentum
Answer:
p is the variable for momentum formula is p=mv
Answer:
p
Explanation:
in this equation you insert the known values.. p=mb than you will et your answer
How many moles of O are in Calcium hydroxide - Ca(OH)2?
Look at mah doggo his name is jasper I have another dog but I cant post two pictures
Answer:
☺
Explanation:
Awwww it's so cute
Pollute means “to make impure.” Pollution is “the act of polluting.” If the suffix -ant means “something that performs an action,” what is a pollutant?
Answer:
something that makes another thing impure
Explanation: