Answer:
D
Explanation:
beacause all the elements in period 3 has different valence electrons hence you look at the first element in period 3 is sodium which has a valence electron of 1 when you go across the period to the right their valence electron decreases to be negative
Answer:
D is the correct answer i hope this is correct
Q
1 At which electrode does reduction always take place?
2 Give the half-equation for the reaction at the anode, during
the electrolysis of these molten compounds:
a potassium chloride b calcium oxide
3 Give the two half-equations for the electrolysis of:
a a concentrated solution of hydrochloric acid, HCl
b a dilute solution of sodium nitrate, NaNO3
c a dilute solution of copper(II) chloride, CuCl2
What is the volume of 45.6 g of silver if the density of silver is 10.5 g/mL?
a. 0.23 mL
b. 4.34 mL
c. 479 mL
Which sets of elements have similar chemical and physical properties?
1. Mg and Ra 2. Al and P 3. Be and Ba 4. Na and Cl
1 & 2 ,
2 & 3
1 & 3
2 & 4
Answer:
1 & 3
Explanation:
Elements have similar chemical and physical properties if and only if they belong to the same group of elements in the periodic table.
A group of elements in the periodic table is a family of elements, the elements in the in the same group have the same number of valence electrons in their outermost shell, share similar chemical reactivity (with slight variation within the group) and similar physical properties (with slight variation within the group).
Magnesium, radium, beryllium and barium all belong to group 2 hence they have similar chemical and physical properties.
What might be a possible outcome if you left a soda in a glass bottle in the freezer for a very long time?
A.
The gases in the soda will increase in volume as the soda transitions from liquid to solid. This will cause the bottle to explode.
B.
The gases in the soda will decrease in volume as the soda transitions from liquid to solid. This will cause the bottle to implode or collapse.
C.
H2O will decrease in volume when transitioning from a liquid to solid state. This will cause the bottle to implode or collapse.
D.
H2O will increase in volume when transitioning from a liquid to solid state. This will cause the bottle to explode.
A the soda will increase in volume
An atom or bonded group of atoms with a positive or neqative charge
Answer:
Radical
Explanation:
Wait did I get your quiz right? Are you asking for the name? If so it's radical
I am trying to figure out what blood type the father of my son could have since my son and I are both type A. Also, my brother is type o and my mom is A.
Answer:
It could probably be O.
Explanation:
Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive. For example, if an O gene is paired with an A gene, the blood type will be A.
The structure of the Earth is divided into four major components: the crust, the mantle, the outer core, and the inner core.
A. True
B. False
What are the formulas for the products of the reaction:
Calcium Chloride + Silver Nitrate →
CaAg + ClNO3
CaNO3 + AgCl2
CaAg + ClN
CaNO3 + AgCl
Ca(NO3)2 + AgCl
Answer:
CaCl2 + 2AgNO3 = Ca(NO3)2 + 2AgCl
Explanation:
Calcium chloride reacts with silver nitrate to produce calcium nitrate and silver(1) chloride
moles are in 4.3 * 10^22 molecules of H3PO4
Answer:
The answer is 0.073
Explanation:
Final step: 0.73 x 10^-1
SeS3 covalent compound name?
Answer:
Selenium trisulfide
Balance this chemical equation. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1."
Choose... H 2 O 2 → Choose... H 2 O + Choose... O 2
What is the temperature range for our planet? Why is this important?
Answer:
are temperature range for are planet is -129 ⁰F (-18⁰C) that's the minimum.
+136⁰F (+58⁰C) this is the maximum surface temperature
Explanation:
"the planet is not too close or too far away from the sun, earth's atmosphere also plays a vital role is regulating the temperature by providing a blanket of gases that not only protects us from excessive heating and harmful radiation from the sun, but also traps heat rising from earth's interior core, keeping us warm"- Space.com
What is the pOH of a substance when [H+] = 5.4 x 10^-8 M
Answer:
pOH = 6.73
Explanation:
First, calculate pH = -log[H+] = -log(5.4 x 10^-8) = 7.27
pOH + pH = 14, so pOH = 14 - 7.27 = 6.73
Oday, you will observe drops of liquid water and compare them to drops of liquid isopropanol, noting whether either liquid evaporates. Given that the energy transferred in from the air will be the same for both liquids, make a prediction about whether both drops or only one drop will evaporate within five minutes. Explain your prediction below.
Answer:
Liquid isopropanol.
Explanation:
Liquid isopropanol will evaporate earlier than water because the boiling point of isopropanol is less than water. That liquid which have high boiling point require more heat energy for change into vapor state as compared to those liquids that has low boiling point. The isopropanol has boiling point i.e. 82.5 °C while on the other hand, water has boiling point i.e. 100 °C so we can say that isopropanol will evaporate first.
The liquid that will be the first to evaporate within 5 minutes is; Liquid Isopropanol
We have the 2 liquids as;
Liquid Isopropanol
Liquid water
Now, since we are dealing with the one that will evaporate within five minutes, we need to know their boiling points.
From online research;
Boiling point of liquid isopropanol is 82.5°C
Boiling point of liquid water is 100°C
Now, we are told that the same energy is transferred for both liquids. However, boiling point of the liquid with the lower boiling point will be achieved first and as a result will evaporate first since the next stage after boiling point is evaporation of steam.
Read more at;https://brainly.com/question/25324798
if the velocity of an object is doubled, its kinetic energy is multiplied by
At a certain grocery store a 0.500 pound container of ground cinnamon cost $6.98 (excluding tax). Cinnamon has a density of 0.560 g/Ml. How much would 500.0 mL of cinnamon cost?
Answer:
The cinnamon cost would be "$8.62". A further explanation is given below.
Explanation:
Cinnamon's density,
= 0.560 g/ml
On converting it into g, we get
= [tex]0.560\times 500[/tex]
= [tex]280 \ g[/tex]
Cinnamon's volume,
= 500 ml
As we know,
1 pound = 435.592 g
Now,
The cost pf cinnamon per pound will be:
= [tex]\frac{6.98}{0.5 \ pound}[/tex]
= [tex]13.96[/tex] ($) per pound
So,
Cinnamon's cost will be:
= [tex]250 \ g\times \frac{1 \ pound}{435.592 \ g}\times \frac{13.96}{1 \ pound}[/tex]
= [tex]8.62[/tex] ($)
What is the molarity of 3 mole of hydrochloride acid in 3 L of water ?
Answer:
1
Explanation:
Formula of molarity is
[tex]M=\frac{n}{v}[/tex]
M= molarity
n= no of moles
v= volume in liters (if mL then you have to convert it to L)
Which of the following is a pure substance?
Chlorine B. salt solution C. bronze D. salad dressing
What is the boiling point of pure water?
About 1000 C B. exactly 1000 C C. it varies D. slightly above 1000 C
Which is an example of a chemical change?
Water evaporating B. butter melting C. match burning D. powder being made
Which of these indicate a chemical change?
Color change B. temperature change C. gas-forming D. all of the above
Which of these is an impure substance?
Tap water B. gold C. carbon dioxide D. boron
Answer:
1. B
2. 100 C
3. C
4. D
5. D
Explanation:
Convert the following temperature units (Hint: K = °C +273)
A) 50°C = __________ K
B) 288 K = __________°C
Answer: a- 323 b- 15
Explanation:
Explain why it is necessary to use a mixture, alumina and cryolite, rather than just
alumina
Explanation:
The mixture of cryolite and aluminium oxide has a lower melting point than pure aluminium oxide. This means a lower amount of energy is required to establish effective conditions for electrolysis and thus makes it more cost effective.
PLZ HELPP!!! WILL GIVE EXTRA POINTS AND BRAINLIEST!!! DUE IN 15 MINUTES!!!
As a scuba diving air tank is filled with air, the air is compressed in the tank to as much as 3000 psi of pressure. When filling the tank, it is observed that the tank becomes warmer.
Which argument BEST explains why this occurs?
A
When air is compressed, it turns solid. A short time later, the air evaporates back into a gas which releases heat.
B
When air is compressed, the molecules line up into a crystalline structure. As the molecules line up, they release energy in the form of heat.
C
When air is put into the tank, it expands rapidly, thereby raising the temperature.
D
Air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature.
Answer:
The gas under pressure subjected to heat can cause the tank to explode. A scuba tank filled to capacity with compressed air at 3000 psi could just as easily go up to 3400-3500 psi if heated
Explanation:
Air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature. Hence option D is correct.
What is pressure?Pressure is defined as the force applied perpendicularly to an object's surface divided by the surface area over which it is applied. The movement of the molecules and the collisions they have with one another and the vessel walls cause the pressure to build up. According to general relativity theory, pressure contributes to the mass-energy cause of gravity by making a gravitational field stronger.
The tank may blow up if the gas within was under pressure and exposed to heat. If heated, the pressure of a scuba tank filled to capacity with compressed air at 3000 psi may readily increase to 3400-3500 psi. Because air molecules are free to move, the temperature in the tank rises as more air is introduced, as the molecules move and collide more quickly.
Thus, air molecules are free to move and as more air is added to the tank, the molecules move and collide faster which raises the temperature. Hence option D is correct.
To learn more about pressure, refer to the link below:
https://brainly.com/question/12971272
#SPJ2
Please help ASAP I’ll mark you as brainlister:(((!!!!!!!!
Answer:
c. Gas particles don't interact
Explanation:
Ideal gas particles do not interact with each other.
The gas molecules do not interact with each other except for colliding with each other. Gases expand to completely fill a container; they would not if they were attracted to each other. That being said, they obviously still do, as a result of Dalton's Law.
Describe the bonding process when two hydrogen atoms combine to
form a diatomic molecule of hydrogen.
Answer:
The electrons located between the two nuclei are bonding electrons. A hydrogen molecule forms from two hydrogen atoms, each with one electron in a 1 s orbital. The two hydrogen atoms are attracted to the same pair of electrons in the covalent bond. The bond is represented either as a pair of dots or as a solid line.
How many moles of methane gas are in 44.8 L of CH at STP?
Answer:
2 mol CH 4
Explanation:
43.8 x L
---------------- = 2 mol CH 4
22.4 x L x mol - 1
What is the correct illustration of the bonding that occurs in H2O?
Answer:
covalent is the bonding that occurs in H2O
Explanation:
Need help with this please help ASAP
Answer:
The correct answer would be -
17. 50% chances of round offspring
18. 25% chances two copies of dominant allele in the genotype of offspring
Explanation:
17. In this question it is stated that the Spongebob is heterozygous and has a square body which means the square body is dominant over the round that is present in sponge Susie that means she has two copies of the recessive allele.
S for square trait and s for a round trait then
S s
s Ss ss
s Ss ss
Thus, the correct answer is 50 percent as there are only two copies of ss.
18. in this question Patric and Patti both have heterozygous for the pink (P) body-color dominant over yellow (p). The chances for the true-breeding dominant genotype would be -
P p
P PP Pp
p Pp pp
There is only one out of four rue-breeding dominant offspring will be produced.
Suppose a fox population exists in an ecosystem. Some of the foxes maintain a heavy coat year-round, while others shed their heavy coat in the summer. Summers in this ecosystem
are becoming steadily hotter because of global warming. Which members of the species will most likely be able to adapt to the changing temperatures?
subject science
Answer:
The fox who shed their heavy coat in the summer.
Explanation:
If a fox has the ability to shed its coat in the summer, it will have no difficulties adapting to new temperatures even during winter. However, the heavy-coated one will.
DO 25 through 37 WRITE IF ITS TRUE OR FALSE FOR EACH ONE. ILL MARK YOU AS BRAINLIEST IF YOU COMPLETE IT AND ALSO SEND ME YOUR CASHAPP NAME SO I SEND YOU $25.
Can someone help me? It needs to have a diagram that has arrows.
Answer: The enthalpy change for formation of butane is -125 kJ/mol
Explanation:
The balanced chemical reaction is,
[tex]C_4H_{10}(g)+\frac{13}{2}O_2(g)\rightarrow 4CO_2(g)+5H_2O(l)[/tex]
The expression for enthalpy change is,
[tex]\Delta H=[n\times H_f{products}]-[n\times H_f{reactants}][/tex]
Putting the values we get :
[tex]\Delta H=[4\times H_f_{CO_2}+5\times H_f_{H_2O}]-[1\times H_f_{C_4H_{10}}+\frac{13}{2}\times H_f_{O_2}][/tex]
[tex]-2877=[(4\times -393)+(5\times -286)]-[1\times H_f_{C_4H_{10}}+\frac{13}{2}\times 0][/tex]
[tex]H_f_{C_4H_{10}=-125kJ/mol[/tex]
Thus enthalpy change for formation of butane is -125 kJ/mol
12) Balance the following chemical equation:
Zn +
H3PO4
Zn3(PO4)2 +
H2
Answer:
Sorry I am not very good at chemistry.
Explanation: