Answer:
William Crookes????????????????
. Which of the following statement is false?
D. Metalloids are conductors.
B. The least reactive elements are on the right side of the periodic table.
C. Metals are most reactive on the left hand side of the periodic table.
A. Most metals are solids.
Answer:
B
Explanation:
Answer: hey im here, whats up?
Explanation:
When atoms share electrons, the electrical attraction of an atom for the shared electrons is called the atom's
Tropical fossils in now cold places is evidence for climate change.
True
False
Answer:
True
Explanation:
Finding tropical fossils in now-cold places is evidence for climate change. This indicates that the site at which the fossils were found once had a tropical climate.
How many moles would there be in 20.0 g of sodium chloride?
Answer:
20.0/1 x 1mole/58.44=0.34
(Atomic mass of salt)
Been a minute since I've done this, but this is how I remember doing it, soo..hope this helps!
Help me with this please
What is the name of this safety equipment?
Answer:
eye wash station
Explanation:
True or False Each layer has different properties
HELPPP
Answer:True
Explanation:
There is 5 different type of layers i think
Answer:
true I'm pretty sure sry if I get it wrong
What occurs when a molecule combines with oxygen and produces heat?
Answer:
It combusts
Explanation:
write the number 874.591 correct to 2 decimal places
Answer:
874.59
Explanation:
The number after 9 is 1
1 is lower than 5 so we leave the previous number the same
The number 874.591 correct to 2 decimal places is 874.59.
What is a decimal number?A decimal is a fraction written in a special shape. as opposed to writing 1/2, for example, you could express the fraction because the decimal 0.5, where the 0 is inside the one vicinity and the 5 is within the tenths vicinity. Decimal comes from the Latin phrase decimus, meaning tenth, from the root phrase decem, or 10.
What are the types of decimals?terminating Decimal Numbers, non-terminating Decimal Numbers, recurring Decimal Numbers, non-recurring Decimal Numbers.Learn more about decimals here: https://brainly.com/question/703656
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What is happening in this diagram?
4 iterations of the following structure: 2 carbons double bonded to each other, each bonded to H above, the left C bonded to H below and the right to R below. The chain begins with an I and a dot. A curved arrow points from the dot to the space before the first structure above; curved arrows point left and right from the double bonds to the spaces before and after the structures. Arrow points to a long chain of carbons, I at the beginning of the chain. The carbons are all bonded to H above, and alternate bonding to H and R below.
Polymers are forming large monomers.
Monomers are forming large polymers.
Polymers are breaking down into monomers.
Monomers are breaking down into polymers.
ANSWER:
Monomers are forming large polymers.
Answer:
It’s B: Monomers are forming large polymers
Explanation:
Answer:
B. Monomers are forming large polymers.
Explanation:
help me with science for brainiest:)
Answer:
The answer is C. Plasma
Given that a particular photon has a frequency of 2.2 x 10'7 Hz, calculate the photon's energy. Submit your answer in
scientific notation, rounded to two significant figures.
The energy of the photon is
X10
Answer:
E = 15×10⁻²⁹ J
Explanation:
Given data:
Frequency of photon = 2.2× 10⁷ Hz
Energy of photon = ?
Solution:
Formula:
E = h.f
h = 6.63×10⁻³⁴ Js
by putting values,
E = 6.63×10⁻³⁴ Js × 2.2× 10⁷ s⁻¹
E = 14.586 ×10⁻²⁹ J
E = 15×10⁻²⁹ J
The energy of photon is 15×10⁻²⁹ J.
Water falls into the ground,lakes,oceans,rivers,and lakes. But how?
Answer:
By precipitation (rain)
Explanation:
Water at the surface of the ocean, rivers, and lakes can become water vapor and move into the atmosphere with a little added energy from the Sun through a process called evaporation. Snow and ice can also become water vapor through a process called sublimation..
What state had the fewest farms? Wisconsin Georgia Illinois
what are unicellular organism?
Answer:
Single celled organism
Explanation:
They fall under two categories:
Eukaryotes and prokaryotes.
Eukaryotes: Evolved from prokaryotes, they are larger and more complex. Unlike prokaryotes, they have a nucleus. Can be single celled or multicellular.
Prokaryotes: Oldest cell type, small and simple. They do not have a nucleus. Open unit with no compartments.
How does the density of a 4-g sample of copper compare to that of a 12-g sample of copper?
Which grouping lists the states of matter in order of increasing distance
between particles?
O1. gas, liquid, solid
O2. liquid, solid, gas
O3. solid, gas, liquid
O4. solid, liquid, gas
what are the orbitals present in the fifth principal energy level
Answer:
what are the orbitals present in the fifth principal energy level
Explanation:
Answer: the fifth principal energy level has the s, p, d, and f orbitals so the answer is letter d
Explanation:
Why is electrical conductivity a resourceful property of metals like copper, silver, and aluminum?
Answer:
The electrical conductivity of metals come from the fact that their outer electrons have been delocalised (meaning that the elections are not locked into atoms but can move freely throughout the metal ) .
And , the electrical conductivity of a metal is determined by the ease of movement of the electrons past the atoms under the influence of an electric field.
An object with a mass of 7 kg accelerates 5 m/s2 when an unknown force is 1 point
applied to it. What is the unknown force? F=ma
Answer:
the unknown force is 35kg/m/s²
Why will carbon and hydrogen share electrons equally?
Explanation:
Carbon has four electrons in its outermost shell and needs four more to fill it.These elements share the electrons equally among the carbons and the hydrogen atoms, creating a nonpolar covalent molecule. Figure 1. Whether a molecule is polar or nonpolar depends both on bond type and molecular shape.
which part of the human body is more complex your heart of the circulatory system
Which statement about ionic bonds is true?
A. ionic bonds form between two nonmetals sharing electrons
B. ionic bonds are very strong attractions because of electromagnetic attractions between a metal and a nonmetal
C. all ionic compounds end in "-ate" or"-ite"
D. type 1 ionic bonds require Roman numerals
HELP WITH REAL ANSWER OR GET REPORTED
GOOD ANSWER = BRAINLIEST
Answer:
The answer is 10.8 g of lH2.
Explanation:
As per the equation, let us calculate the mole ratio.
N2+3H2→2NH3
As per the equation one mole of nitrogen reacts with 1 mol of hydrogen.
In terms of mass. 28.01 g of nitrogen needs 3 mol of hydrogen or 6.048 g of hydrogen.
We can set up the ratio:
28.01 g of lN2 needs 6.048 g of lH2
1 g of lN2 needs 6.048 / 28.01 g of lH2
50.0 g of lN2 needs 6.048×50.0 28.01 lg of lH2
=
10.8 g of lH2
Hope this helps!! ;)
Can someone please help !!
Answer: the sugar ge hotter??
Explanation:
The molar mass of a substance is 92.010g. The substance is 30.4% nitrogen and 69.9% oxygen. What is the empirical formula and the molecular formula of the substance
Answer:
Empirical formula = NO₂
Molecular formula = N₂O₄
Explanation:
Percentage mass of Nitrogen = 30.4 %
Percentage mass of Oxygen = 60.9 %
Mole ratio of the elements:
Nitrogen = 30.4/14 = 2.17
Oxygen = 69.9/16 = 4.37
Dividing by the smallest ratio to obtain a simple ratio
Nitrogen: 2.17/2.17 = 1
Oxygen; 4.37/2.17 = 2
Therefore, the simplest mole ratio is 1:2
Empirical formula = NO₂
Molecular formula = n(empirical formula), therefore, molecular mass = n *(empirical mass)
92.010 = n(14 + 32)
92.010 = 46n
n = 92.010/46
n = 2
Therefore, molecular formula = 2(NO₂)
Molecular formula = N₂O₄
does anyone know what convection,conduction,radiation??
Answer:
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. Radiation is the transfer of thermal energy through thermal emission.
safe laboratory practices should be followed by all chemists and other scientists true or false
Answer:
True
Explanation:
Answer:
True
Explanation:
A runner can run at a speed of 4km/h in 2 hours. What distance will she
cover in that time? Remember to put the correct units too. *
Answer:
Distance cover = 8 km
Explanation:
Given:
Speed of runner = 4 km/h
Time taken = 2 hour
Find:
Distance cover
Computation:
Distance = Speed x Time
Distance cover = Speed of runner x Time taken
Distance cover = 4 x 2
Distance cover = 8 km
What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass number of 39
Answer:
NO OF NEUTRON =MASS NO -ATOMIC NO
=39-19
=20
bcz atomic no is equal to no of electrons
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