Answer:
strontium salts, lithium salts, lithium carbonate, Li2 CO3 = red, whitehot metal, such as magnesium or aluminum, barium oxide, BaO = white, copper compounds + chlorine producer, copper acetoarsenite (Paris Green), Cu3 As2 O3 Cu(C2 H3 O2 )2 = blue. We will need a metal chemical, so that when it is heated it will produce the incandescent to make the fountain effect.
Explanation:
^^
If you include structures in which sulfur has an expanded octet and exclude structures with triple bonds, how many resonance structures can be drawn for sulfur trioxide, SO3
Answer:
Seven
Explanation:
SO3 has a trigonal planar structure. The most apt bonding description is that of sulphur forming three sigma bonds giving rise to the plane triangle and then the presence of three delocalized pi bonds.
Plausible resonance structures for SO3 has been shown in the image attached. In all the structures, there is none in which sulphur is pictured as having triple bonds.
image credit: socratic
The periodic table says that the average mass of copper is 63.55 but there is no such thing as copper-63.55. Why? (please use copper-63 and copper-64 in your answer)
Answer:
69%for the isotope that weighs 62.93 u and
31
%
for the isotope that weighs 64.93 u.
You can approach this problem by using a single equation; let's say the first isotope contributes to the relative atomic mass by a fraction
x
(
x
<
1
). SInce there are only 2 isotopes to consider, the fraction the other isotope contributes with will automatically be
1
−
x
.
Let's set up the equation
x
⋅
62.93
u
+
(
1
−
x
)
⋅
64.93
u
=
63.55
u
Solving this for
x
will produce
64.93
u
−
63.55
u
=
2
x
→
x
=
1.38
2
=
0.69
Multiplying these fractions (0.69 and 1 - 0.69 = 0.31) by 100% percent to get the results as a percentage will give
69
%
for the isotpe that weighs 62.93u and
31
%
for the one that weighs 64.93u.
Answer link
Which statement best explains why the overall charge on an atom is zero?
Answer:
which statements
Explanation:
Answer:
The positive charge of the protons in the nucleus equals the negative charge in the electron cloud.
Explanation:
I just took the assignment.
A chemical reaction produces 56.2 grams of iron (II) sulfide (FeS). How many moles of iron (II) sulfide does the reaction produce? (1 mole FeS = 87.92 grams FeS) *
1.00 moles FeS
2.50 moles FeS
0.639 moles FeS
4.98 moles FeS
Answer:
0.639
Explanation:
How many grams of sodium are in .500 of a mole
Convert mole to gram by multiplying the molar mass of sodium
0.500mol Na x 22.990g = 11.495g of Na
If an element has atoms, in their ground-state, with 6 valence electrons, the element could be: (check all possible answers)
Answer:
You included no options however the elements with 6 Valence electrons are;
Oxygen ⇒ OSulfur ⇒ SSelenium ⇒ SeTellurium ⇒ TePolonium ⇒ Polivermorium ⇒ UuhValence electrons refer to the electrons an element has on its outermost shell. The number of these electrons determines the charge that an electron will carry as it seeks stability.
It also determines which group the element will be in in the Periodic table. Elements with 1 valence electron for instance will be in Group 1 and elements in Group 16 will have 6 valence electrons.
A student needs 1.52 moles of sodium hydroxide (NaOH). How many grams of sodium hydroxide are required? (1 mole NaOH = 40.00 grams NaOH) *
60.8 grams NaOH
1.00 grams NaOH
62.7 grams NaOH
0.038 grams NaOH
Answer:
1 molecule = 40.00 grams
1.52 molecules = 1.52*40.00
= 60.8 grams
58:27
1
Dominic made the table below to organize his notes about mixtures
Properties of Mixtures
has no set composition
must have more than one state of matter
must have more than one substance
What mistake did Dominic make?
The title should read "Properties of Solutions" because some mixtures do not have all of the properties listed
O There is a definite recipe to make each mixture, so the composition of a mixture is set.
Although it is possible to have more than one state, it is also possible to have only one state.
O A single substance can be used to make a mixture if the substance is composed of more than one element
Sao and Fit
Answer:
Although it is possible to have more than one state, it is also possible to have only one state.
Explanation:
The mistake Dominic made was stating that "although it is possible to have more than one state, it is also possible to have only one state."
Mixtures are impure substances with the following properties:
They have an indefinite composition
Their constituents retains their identities.
Constituents react differently to changed conditions.
They can easily be separated into constituents by physical methods.
There are two types of mixtures based on the number of phases coexisting:
Homogeneous mixtures have their constituents existing in just one phase.
Heterogeneous mixtures exists in at least two different phases.
Explanation:
why do we study properties of matter
Answer:
The properties of matter include any traits that can be measured, such as an object's density, color, mass, volume, length, malleability, melting point, hardness, odor, temperature, and more. We need to study all these traits since every single object around us, including us, is made of matter. Without matter we wouldn't exist; it would be infinite darkness everywhere.
A purified protein has a molecular mass of 360 kDa when measured by size exclusion chromatography. When analyzed by gel electrophoresis in the presence of SDS, three bands are observed, with molecular masses of 160, 140, and 60 kDa. When gel electrophoresis is carried out in the presence of SDS and dithiothreitol, three bands are once again observed, with molecular masses of 140, 80, and 60 kDa. What is the subunit composition of the protein?
Answer:
A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.
A disulfide bond links the two 80 kDa subunits (possibly identical).
Explanation:
Given that:
A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.
A disulfide bond links the two 80 kDa subunits (possibly identical).
As a result of SDS and dithiothreitol analysis treatment, the molecular masses can not be 360 in total. They are 280, which implies that they are in short of 80 kDa. This means that there are possibilities that two groups with a molecular mass of 80 kDa which are joined by a disulfide bond.
The presence of SDS and dithiothreitol acts as a reducing agent, and they can break disulfide bonds whose pH is greater than 7, i.e. those in basic condition.
Where does the energy within the greenhouse effect originate?
from convection within the atmosphere
from the circular movement of hot and cold air
from solar radiation entering the atmosphere
from the conduction of heat from the ground to the air
Answer:
from solar radiation entering the atmosphere
Explanation:
The energy within the greenhouse effect is originated from solar radiation entering the atmosphere, hence option C is correct.
What is solar radiation?Solar radiation is a broad word for the electromagnetic radiation that the sun emits. It is also sometimes referred to as the solar resource or just sunshine.
A variety of devices can be used to collect solar radiation and transform it into useful forms of energy, such as heat and electricity.
Heat is reflected into the atmosphere from solar energy that has been absorbed in the earth's surface.
Greenhouse gases absorb a large portion of the heat as it travels through the atmosphere and is radiated back into space.
Therefore, the greenhouse effect is powered by solar radiation that reaches the atmosphere.
Learn more about solar radiation, here:
https://brainly.com/question/23338147
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A ______________________ is required to cause atoms to bond together or be separated from one another. *
a physical change
b phase change
c radioactive decay
d chemical reaction
Answer:
d chemical reaction..
do people cause melting glaciers
Answer:
Human activities are at the root of this phenomenon.
Explanation:
Juan measures a piece of metal and determines it has a mass of 10 grams and a volume of 2 ml
What is the density of the piece of metal?
Answer:
The answer is 5.0 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 10 g
volume = 2 mL
We have
[tex]density = \frac{10}{2} \\ [/tex]
We have the final answer as
5.0 g/mLHope this helps you
Answer:
5.0 g/mL
Explanation:
2. What is the formula to calculate speed?
Answer:
s=d/t
s=speed
d=distance traveled
t=time elapsed
(hurry will give brainliest)What element that has 5 Valence Electrons and 4 energy levels?
Answer:
arsenic (As)
Explanation:
Determine the number of liters in a 355 milliliter can of soda.
Ans: 0.355 L
Cu(NO3)2+Zn(s)>Cu(s)+Zn(NO#)2 is an example of which type of reaction. A) decomposition B) single-displacement C) combustion D) double-displacement
Pls, Help!!!!
When ionized, which of the following would become isoelectronic with argon?
Answer:
[tex]Cl^-[/tex]
Explanation:
Hello.
In this case, when chlorine gets ionized by gaining one electron it goes:
[tex]Cl^-[/tex]
Whose electron configuration is the same as argon:
[tex]Cl^-=Ar:1s^2,2s^2,2p^2,3s^2,3p^6[/tex]
Since the both of them have 18 electrons, they become isoelectric with the same neutral charge.
Best regards.
Which properties makes a metal a good material to use for electrical wires?
A. Malleability and reactivity
B. Conductivity and ductility
C. Ductility and malleability
D. Reactivity and conductivity
Answer:
D
Explanation:
Because a metal must reactive and able to conduct
Answer:
B.Conductivity and ductility
Explanation.
Some metals are conductive and are ductile
Conductivity is the ability to have an electric flow
Ductility is the ability to bend
6th grade help me plzzzzzz
Answer:
It's protons and neutronsExplanation:
Hope this helpsAccording to the octet rule, an atom is usually stable when it has _____ valence electrons.
A. 4
B. 8
C. 6
D. 10
Answer:
B. 8
Explanation:
Compare and contrast ionic and covalent bonds by explaining what the electrons do when bonding occurs. Use details to support your answer.WILL GIVE BRAINLIEST
Complete the equation for the conversion of sucrose into glucose
(1)C12H22O11 + H2O
Answer:
C₁₂H₂₂O₁₁ + H₂O → C₅H₁₂O₆ + C₆H₁₂O₆
Explanation:
Chemical equation:
C₁₂H₂₂O₁₁ + H₂O → C₅H₁₂O₆ + C₆H₁₂O₆
Source of sucrose:
Sucrose is present in roots of plants and also in fruits. It is storage form of energy. Some insects and bacteria use sucrose as main food. Best example is honeybee which collect sucrose and convert it into honey.
Monomers of sucrose and hydrolysis:
Sucrose consist of monomers glucose and fructose which are join together through glycosidic bond. Hydrolysis break the sucrose molecule into glucose and fructose. In hydrolysis glycosidic bond is break which convert the sucrose into glucose and fructose. Hydrolysis is slow process but this reaction is catalyze by enzyme. The enzyme invertase catalyze this reaction.
The given reaction also completely follow the law of conservation of mass. There are equal number of atoms of elements on both side of chemical equation thus mass remain conserved.
Help!!!
A. A halogen
B. An alkaline earth metal
C. An alkali metal
D. A transition element
Answer:
B?
Explanation:
How many oxygen atoms are in H2SO4?
When vinegar and baking soda are combined bubbles begin to form. Bubbles are evidence of a chemical reaction because they
Answer:
bubbled
Explanation:
its simple they bubbled
signs of chemical reactions are change of
odor
bubbles
solid turns liquid
liquid turns solid
change of color
Help me out i don’t not understand this
Explanation:
hope this helps!!! happy learning!!!!
2.0 moles of sodium (Na) would have a mass of-
A) 0.087 grams
B) 46 grams
C) 1.2 x 10^24 grams
D) 3.3 x 10^-24
Explain the difference between the reactants and
products of a chemical reaction.
MP
Answer:
HOPE THIS HELPED :) good luck! ❤️
Explanation:
A reactant is a substance that is present at the start of a chemical reaction. The substance to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
Answer:
Reactants are the starting substances and products are the ending substances in a chemical reaction. The atoms in reactants are arranged one way and are rearranged in a different way to form the products (in other words, reactants are chemically different from products). The properties of reactants differ from the properties of products.
Explanation:
Sample response on Edge 2021