Answer:
UV filter cream
I will be hydrated and keep a wet cloth over my head
I do not live in Philippines
Answer:
1. Sunglasses protect my eyes from UV rays and reduce the risk of cataracts. They also protect the tender skin around your eyes from sun exposure. Sunglasses that block both UVA and UVB rays offer the best protection. Wrap-around sunglasses work best because they block UV rays from entering on the side.
2. Block out the sun at home during the day by closing curtains and blinds. Open the windows when there is a cool breeze. Stay out of the sun during the hottest part of the day. If you do have to go outside, wear a hat and sunscreen, and seek shade.
3. the Philippines enjoys a tropical climate that is for the most part hot and humid year-round, but can be roughly divided into a dry season between November and May, and a wet season between June and October. Although in recent years, due to climate change, summers have been extending into June and July.
start with 3 breads and 2cheese. how many products are made? and what are the leftovers?
Identify one natural process that may cause sudden climate changes.
Answer:
Global Warming , Volcanic Eruption
Is hand washing a chemicals change or physicals change and why?
Answer:
If you wash your hands with soap, the soap molecules act as a link between the water you're washing with and the oil on your skin.
Explanation:
Coal, oil (petroleum), and natural gas are used as fuel. The
graph shows changes in the per capita consumption of
these three natural resources since 1820
Per Capita Consumption of Various Fuels
25
jetes per capita per year
15
Cool
5
What is the most result of this increased use of foss?
Answer:
Fossil energy has been a fundamental driver of the technological, social, economic and development progress which has followed.In 2019, around 84% of global primary energy came from coal, oil and gas. Over the coming decades we need to rapidly reduce this share by displacing them with low-carbon energy sources.Fossil energy has been a fundamental driver of the technological, social, economic and development progress which has followed.In the sections above we looked at the consumption of fossil fuels collectively. But it’s important to look at the role of coal, oil and gas individually – their impacts are not equal. Coal, for example, typically produces more CO2 and local air pollution per unit of energy.There would be more research on the use of alternate fuels.Moreover, fossil fuels are composed primarily of carbon and hydrogen atoms. On combustion they produce carbon dioxide, sulfur dioxide, and carbon monoxide as the main by-products.Solar energy can only be captured during daylight hours.
Explanation:
if you write this then you will get full marks in your assignment it is valied for up to 16 class I don't know about any further it I have mixed many iconic and logic facts that are imp in science!
Bacteria and mold break down fallen leaves on the forest floor. When they do
this, they release carbon dioxide into the atmosphere and ntrogen to the
soil. Which of the following roles do bacteria and mold have in the
environment?
Answer:
H
Explanation:
not sure tho sorry if I'm wrong
What happens in nuclear fusion?
A. Isotopes are made from gamma rays.
B. Two separate nuclei form one nucleus.
C. Missing mass is added back to a nucleus.
D. Nuclei spontaneously break down.
PLEASE ANSWER I RLLY NEED IT
Galaxy #9
To which category does galaxy #9 belong? Why does it belong in this category?
PLEASE ANSWER!! NEED THIS BY TOMORROW!! WILL GIVE LOTS OF POINTS!! NO LINKS OR RANDOM RESPONSES, will report!
what is the Net ionic and spectaror ions of
Pb(NO3)2 (aq) + 2 KCl (aq) PbCl; (s) + KNO, (aq)?
Explanation:
i colour code it so hopefully it make sense:)
I need help with both of the questions fast plz!!!
Answer: SMALLEST is lithium
LARGEST is Fluorine
Explanation:
A stretched spring has an elastic potential energy of 35 J when it is stretched 0.54 m. What is the spring constant of the spring? Round your answer to two significant figures.
StartFraction N over m EndFraction
Answer:
240 N/m
Explanation:
Using the formula as follows:
U = ½kx²
Where;
U = elastic potential energy (J)
K = spring constant (N/m)
x = stretched displacement (m)
According to the information provided in this question,
U = 35J
x = 0.54m
k = ?
U = ½kx²
35 = ½ × k × 0.54²
35 = ½ × k × 0.2916
35 = 0.2916k/2
70 = 0.2916k
k = 70 ÷ 0.2916
k = 240.05
To 2s.f, the spring constant (k) = 240 N/m.
Answer: 240
Explanation:
Please help me, It's my last question :)
Imagine you have a 5L balloon that you would like to fit into a 3L container. The current temperature is 298 K. At what temperature would you need to change the system to allow the balloon to fit into the container? Show your work.
[tex]V_{1} = \text{5 L}[/tex]
[tex]T_{1} = \text{298 K}[/tex]
[tex]V_{2} = \text{3 L}[/tex]
Unknown:[tex]T_{2}[/tex]
Solution:[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]
[tex]T_{2} = T_{1} \times \dfrac{V_{2}}{V_{1}}[/tex]
[tex]T_{2} = \text{298 K} \times \dfrac{\text{3 L}}{\text{5 L}}[/tex]
[tex]\boxed{T_{2} = \text{179 K}}[/tex]
[tex]\\[/tex]
#ChemistryIsLife
#ILoveYouShaina
current electricity occurs naturally(true or false)
Answer:
True
Explanation:
What is the product of the unbalanced combustion reaction below?
C4H10(g) + O2(g) →
A. C(s) + H2O(9)
B. C6H1206(s)
C. CO2(g) + H20(9)
D. CO2(g) + H2(9)
Answer:
C
Explanation:
because it is complete combustion so it will produced CO2 +H2O :)
Which choice can be classified as a pure substance?
salt water
Iced Tea
pumpkin pie
salt
Answer:
Salt
Explanation:
It is because it has a defined composition.
Answer:
Salt
Explanation:
Pure substances are those that contain atoms or molecules of the same type. For eg: elements are pure (gold, hydrogen etcl.) and compounds (such as water, sodium chloride, etc.), etc.
Rest of choice are impure because they contain a mixture of different things, like pie has eggs, or all sorts of other molecules, salt water has water and salt molecules, and iced tea has water and other molecules associated with tea.
Calcular el porcentaje de cada elemento en los compuestos químicos dados.
1. KNO3 (Nitrato de potasio: fertilizante): %K=? , %N=? , %O=?
Answer:
%K=38,6% %N=13,86% %O=47,54%
Explanation:
%K=M K/M KNO3
=39/101
=38,6%
%N=14/101
=13.86%
%O=100%-%K-%N
=100-38,6-13,86
=47,54%
You have a beaker of water that potentially has Ag+ ions and Ba+ ions (it could have both, one of them, or none of them). How would you design an experiment (flow chart or procedure steps) that will determine which (if any) of these ions are in your water?
Answer:
See explanation
Explanation:
Qualitative analysis in chemistry is a method used to determine the ions present in a solution chiefly by means of chemical reactions.
In this case, I suspect the presence of silver ions and/or barium ions. The first step is to add dilute HCl. This will lead to the precipitation of the silver ion as AgCl. If a white precipitate is formed upon addition of HCl then Ag^+ is present in the solution.
Secondly, I add a carbonate such as NH4CO3(aq). This will cause the barium ions to become precipitated as barium carbonate. Hence, the formation of a white precipitate when NH4CO3(aq) is added to the solution indicates the presence of barium ion in the solution.
Radical's of
1. Carbonate=
2.hydroxide=
3.bicarbonat=
4.chloride=
5. phosophate=
6. sulphate=
8. Nitrate=
9. Nitrite=
10. Iodide=
please answer 50 marks
Answer:
1..CO3
2..OH
3..CO
4..Cl
5..PO3
6..SO4
8..NO3
9..NO2
1O..I2
What is the total mass of a 10 gram sample of 42K that will
remain unchanged after 12.4 hours?
A 2.5 g
B 5.0g
C 7.5 g
D 10 g
what is the product of the reaction between arsenic and oxygen
a. AsO
b. AsO2
c. As3O2
d.As2O3
Answer:
d
Explanation:
As + O2 -------->as2o3
Which of the following characteristics of the Earth are essential to the existence of life?
Characteristics 2 and 4
⊝
Characteristics 1, 2, and 4
⊝
Characteristics 2, 4, and 5
⊝
Characteristics 1 and 3
i need to know ASAP
the answer is 2 and 4 earth's atmosphere containing oxygen and nitrogen is essential for life and the surface temperature is also essential
What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of bromine? Hint - consider the mass of both atoms of bromine in your calculation. A.43% B.87% C.13% D.63%
Answer:
B. 87%
Explanation:
First, we calculate the molecular mass of magnesium bromide (MgBr2) as follows;
MgBr2 = 24.3 + 79.9(2)
= 184.1g/mol
Since 1 atom of bromine contains 79.9g, then the mass of two atoms of bromine (Br2) is 79.9 × 2 = 159.8g
Hence, the percentage of bromine (Br2) in MgBr2 is calculated as follows:
% mass of Br2 = mass of Br2/ molecular mass of MgBr2 × 100
% mass of bromine = 159.8/184.1 × 100
% mass of bromine = 0.8680 × 100
% mass of bromine = 86.8%
Approximately, % mass of bromine is 87%
What is the number of carbon atoms in a cycloalkyne with 8 hydrogen atoms
Answer:
4
Explanation:
C4H8
The table below gives some characteristics of element Y
what is the identity of Y
Answer:
I doint understand that question resend it again
If 81g of water is measured out, how many moles are in the sample? *
A. 4
B. 5
C. 2.5
D. 4.5
Answer:
D
Explanation:
because moles = mass /mr
so 81/18(mr of H2O=2+16)
moles =4.5
hope this helps:)
cho 6,5g muối sắt clorua tác dụng với dung dịch AgNO3 dư thu được 17,22g kết tủa. Công thức hóa học của muối sắt clorua là công thức nào? biết hệu suất phản ứng là 100%
Answer:
Công thức muối sắt là FeCl_3 nha bạn.
True or False: Electrons are significantly smaller than protons and neutrons, we can ignore electrons when we consider the physical property of an atom.
Answer:
true
Explanation:
Wha is the molecular formula ?
[tex]NONSENSE=REPORTED[/tex]
A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule. The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula.
I hope it seemed helpful to you!
Answer:
Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element’s symbol. The molecular formula expresses information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols and numbers. Sometimes it also includes other symbols, such as parentheses, dashes, brackets, and plus (+) and minus (–) signs.
Hope it's helpful
sodium chloride (NaCl) is an ionic compound that we consume everyday as a table salt,
what is the reason that the structure of the ionic compound causes the compound to be hard
and shiny? *
Answer:
See Explanation
Explanation:
Ionic compounds are composed of crystals. The crystal structure of an ionic compound is responsible for its hardness.
A crystalline solid contains a well organized structure which enables it to be hard and have a particular geometric shape as well defined melting point.
Hence, all the observed characteristics of NaCl are the result of its crystalline structure.
The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? O The molecules move more quickly and their average kinetic energy increases. O The molecules move more slowly and their average kinetic energy decreases O The molecules move more quickly and their average kinetic energy decreases. O The molecules move more slowly and their average kinetic energy increases.
Explanation:
The molecules move more slowly and their average kinetic energy decreases
The molecules move more slowly and their average kinetic energy decreases. Hence, option B is correct.
What is the molecular level?On the molecular level, the individual chemical bonds in the substance are not altered; hence, a phase change is not a chemical reaction.
At the molecular level, the temperature is related to the random motions of the particles (atoms and molecules) in matter.
Because there are different types of motion, the particles' kinetic energy (energy of motion) can take different forms, and each form contributes to the total kinetic energy of the particles.
Hence, option B is correct.
Learn more about the molecular level here:
https://brainly.com/question/2449642
#SPJ2
What is pOH? ?
A. pOH = Iog[ΟΗ]
Ο Ο Ο
Β. pH = Iog[Η]
Ο C. pH = Iog[ΟΗ]
D. pOH = [Η
(OH)