I need c and d pleaseeee!!

I Need C And D Pleaseeee!!

Answers

Answer 1

Answer: yes

Explanation: cuz i know lol


Related Questions

All changes in phase (solid-liquid-gas) are

Answers

Answer:

States of matter

Explanation:

Three states of matter

What are sum things yhu can do to prevent brain damamge

Answers

Answer:

not bang your head

Explanation:

Answer:

focus on your surroundings

How many grams of chlorine are required in order to consume 8 mol of
sodium?

Answers

141.8 grams i think

Changes in the total amount of thermal energy provide evidence that chemical reactions have taken place. A chemical reaction in which energy has been absorbed is known as a(n):
Select one:
physical reaction.

endothermic reaction.

reversible reaction.

exothermic reaction.

Answers

Answer:

B. endothermic reaction

Explanation:

A beaker contains a sample of water with a mass of 325 grams. The water in the beaker
is boiled and weighed again after it cools. The new mass of the water is 305 grams. In
this example of the conservation of matter in physical changes,
A. the mass is less after it cools because water has less mass as a gas.
B. the mass of the water was 305 grams and the mass of the water vapor was 20 grams.
C. the process of boiling destroyed 20 grams of the water and left 305 grams of water.
D. the heat energy created by boiling water makes up the rest of the mass.

Answers

Answer: a

Explanation:

Bc I just did it and yeah

When one element replaces another element the reaction is known as a _ replacement reaction ​

Answers

Answer:

Single replacement reaction

Explanation:

A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.

Single replacement reaction

Help on 2 and 3 due tomorrow pls help

Answers

Answer:

2

b= they are grouped differently, but all the atoms are still there.

what system is the trachea is part of

Answers

respiratory tract

The trachea is part of the lower respiratory tract, along with the lungs, bronchi, bronchioles, and alveoli.

The nucleus of an atom is ______ charged

Answers

Answer:

The nucleus of an atom is positively charged.

Explanation:

The nucleus of an atom is positively charged because :

The nucleus is a small dense region at the center of the atom. It consists of a positive protons and neutral neutrons. so, It has an overall positive charged.

When a strontium atom loses two electrons to form an Sr2+ ion, the electrons are lost from the
a. 5s orbital. c. 3d orbital.
b. 5p orbital. d. 4f orbital.

Answers

Answer:When a strontium atom loses two electrons, it becomes a(n) cation with a charge of 2+. when any neutral atom loses an electron it becomes cation that is positively charged ions and an ion gets the charge according to the number of electrons loses.

you are very welcome but I may be inaccurate.

If you had 14.5 moles of gold, how many atoms would you expect to have?

Answers

Answer:

(14.5 mol) x (6.022 x 10^23 atoms/mol) = 8.73 × 10^24 atoms

Explanation:

pls mark brainliest

Explain why a climax community is not always a forest.

Answers

They are all in forest climax means forest

You use a _____ when you are changing compounds

Answers

Answer:

coeffeicent!

Explanation:

this balances equations and also changes the amount of a compound/element present

Which branch of chemistry would study how pollution effects marine life?
biochemistry
physical chemistry
materials chemistry
environmental chemistry

Answers

Answer: (D) environmental chemistry

Explanation:

The environmental chemistry is branch of chemistry would study how pollution effects marine life. option D is correct.

What is  environmental chemistry?

Environmental chemistry is the study of the biochemical and chemical processes that occur in natural places like in forest, water bodies in air in soil and related to animals too.

Environmental chemistry is wide range of studies than air, water, soil, and chemicals. This also gives the brief account about the marine life with studying the life cycle of marine animals and plants too.

Therefore, environmental chemistry is branch of chemistry would study how pollution effects marine life. option D is correct.

Learn more about environmental chemistry, here:

https://brainly.com/question/25046469

#SPJ2

What is the molar mass of a sample of gas that has a density of 2.85g/L at 101kPa pressure
and 29°C? Name the law that is used to solve this problem.

Answers

Answer:71.25

Explanation:

The molar mass of a sample of gas that has a density of 2.85g/L at 101 kPa pressure and 29°C is 71.37  g mol⁻¹ and It can be solved using Ideal gas law.

What is Ideal gas law ?

The ideal gas law is an equation of state that describes ideal gases.

This equation of state relates a gas’s pressure, volume, temperature, and mass, and is very useful for describing how gases will behave in ideal conditions.

This is the most common equation of state for gases.

Ideal Gas equation ;

PV = nRT

Molar mass (Mm) = m /n

Where ;

m = given massn = number of moles

we also know,

Density (D) = m / v

Where ;

m = massv = volume

Now, Putting the formula of Molar mass and Density in ideal gas equation we get ;

Molar mass = D RT/ P

Given ;

Density = 2.85 g/LPressure = 101kpa (= 0.99 atm)Temperature = 29°C (= 302.15 K)(Gas constant) R = 0.0821

Putting all the values in  the above equation of molar mass ;

Molar mass = 2.85 x 0.0821 x 302 / 0.99

                    = 71.37  g mol⁻¹

Learn more about Ideal gas law here ;

https://brainly.com/question/13821925

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helpp

simplify the meaning of these

circuit
electric current
voltage difference
ohms law
resistance ​

Answers

Answer:

circuit

electric current

voltage difference

ohms law

resistance ​

Explanation:

Circuit - a roughly circular line, route, or movement that starts and finishes at the same place.

Electric current - A net unidirectional movement of electrons, or other charge carriers, caused by a potential difference

Voltage difference - A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit.

Ohms law -a law stating that electric current is proportional to voltage and inversely proportional to resistance.

Resistance - The refusal to accept or comply with something; the attempt to prevent something by action or argument.

Which statement cannot be used in favor of solar energy


A) It does not produce any greenhouse gases.

B) There is a relatively high installation cost associated with solar panels.

C) New renewable jobs can be created with solar energy technology.

D) Solar energy from the sun is forever because the sun will exist forever.

Answers

The answer would be letter B.
I think D but I’m not sure...

If Hydrochloric Acid and Calcium Carbonate were combined would the reaction that occurs be endothermic or exothermic? Why?

Answers

Answer:

endothermic

Explanation:

more energy is being released and heat is being required to do the process.

Where are organelle located

Answers

Answer:

organelle are located in da cytoplasm of eukaryotic and prokaryotic cells

Hope this helps!

Please help ASAP I’ll mark you as brainlister

Answers

Answer:

2

Explanation:

The balanced chemical equation for this reaction is:

2Na + K2S → 2K + Na2S

Meaning the coefficient for potassium (K) is 2.

Answer:

2 / 1 => 2 / 1

Convert the following problems:

a 96 kg to g

b 15 cL to kL

c 188 dL to L

d 3600 m to km

e 234 K to °C

f 43 °C to °F

i would really appreciate the help on this, I'm kinda struggling

Answers

Answer:

a.) 96000 g

b.) 0.00015 kL

c.) 18.8 L

d.) 36 KM

e.) -39.15 C

f.) 109.4 F

Explanation:

To turn kg to g, multiply the value by 1000

To Turn CL to KL, divide the volume value by 10000

To turn dl to l, divide volume by 10

to turn m to km, multiply meter value by 0.001 or divide by 1000

To convert c to f, multiply the temperature in degrees Celsius by 2, and then add 30

i hope this helps : )

When mud and water are combined, the result is ______.
A. a mixture
B. an element
C. a molecule
D. a compound

Answers

Answer:

A. a mixture

Explanation:

hope this helps

A. A mixture

You are mixing both mud and water so a mixture

4. A girl walked for 30 minutes. She noticed that she traveled farther in the first 15 minutes of
her walk than in the second 15 minutes,
What can she conclude about her walk?
A she walked over many hills
B
her average speed was faster during the first part of her walk
C. she walked in two different directions
D. she was walking at a constant speed

Answers

i think it’s B.
because her speed was faster in the first part of her walk

what is the mass of [tex]Fe^{2+}[/tex] in 5 tablets of iron if the number of moles of [tex]Fe^{2+}[/tex] is 4.2225 x [tex]10^{-4}[/tex] mol.
[ Ar = Fe, 56 ]

Answers

Answer:

Approximately [tex]0.11823\; \rm g[/tex] in total for the five tablets.

(Approximately [tex]2.3646 \times 10^{-2}\; \rm g[/tex] per tablet.)

Explanation:

The relative atomic mass of an element is the ratio between:

the mass of one atom of this element, and the mass of one-twelfth of a carbon-[tex]12[/tex] atom.

The definition of moles ensures that the relative atomic mass of an element is approximately numerically equal to the mass (measured in grams) of one mole of the atoms of this element.

The question states that the relative atomic mass [tex]A_{\rm r}[/tex] of iron is [tex]56[/tex]. In other words, the mass of one mole of iron [tex]\rm Fe[/tex] atoms would be approximately [tex]56\; \rm g[/tex].

The question is asking for the mass of some amount of [tex]\rm Fe^{2+}[/tex] ions. Each [tex]\rm Fe^{2+}\![/tex] ion contains two fewer electrons than a neutral [tex]\rm Fe[/tex] atom. Hence, [tex]4.2225 \times 10^{4}\; \rm mol[/tex] of [tex]\rm Fe^{2+} \![/tex] ions might be lighter than the same number of [tex]\rm Fe \![/tex] atoms by a very small extent: The mass of one mole of electrons is approximately [tex]5 \times 10^{-4}\; \rm g[/tex], much smaller than the mass of the same number of [tex]\!\rm Fe[/tex] atoms (approximately [tex]56\; \rm g[/tex].)

Estimate the mass of these [tex]4.2225 \times 10^{4}\; \rm mol[/tex] of [tex]\rm Fe^{2+}[/tex] ions using the mass of the same number of [tex]\rm Fe[/tex] atoms:

[tex]\begin{aligned}&m({\rm Fe^{2+}}) \\ &\approx m({\rm Fe}) \\ &\approx 4.2225 \times 10^{-4}\; \rm mol \\ &\quad\quad \times 56\; \rm g \cdot mol^{-1} \\ &\approx 2.3646 \times 10^{-2}\; \rm g \end{aligned}[/tex].

Five of these tablets would contain approximately [tex]5 \times 2.3646 \times 10^{-2}\; \rm g \approx 0.11823\; \rm g[/tex] of [tex]\rm Fe^{2+}[/tex] ions.

What is the mass in grams of 4.8 moles of Calcium Hydroxide?

Answers

Answer:

355.2 grams

Explanation:

m = M×n= (40 + 2(16+1))×4.8= 355.2 (g)

The answer is 74.093 g/mol

Which is not a property of a gas? * exert pressure high density High compressibility readily soluble

Answers

Explanation:

A gas is state of matter in which there is large intermolecular distance and hence, a weaker molecular force of attraction in comparison to solids and liquids. therefore, it impart certain properties to gases which are uncommon in solids and liquids

Properties of a gas includes:

Exert pressure on the container

Highly compressible

Low density

and readily soluble in other mediums

Hence, high density is not a property of a gas.

How many grams are in 1.5 moles of LiF?

solve for unknown

Answers

Answer:

The gram formula mass is the sum of the gram atomic masses of the atoms that make up a chemical formula. For lithium fluoride this works out to be 7g + 19g = 26g. Hence the mass of 1 mole of LiF is 26g; and the mass of 1.5 moles of LiF must be 1.5 × 26g = 39g.

Which two groups of the periodic table do not contain any non-metal?

Answers

The 17th and 18th i think.. If by non-metal you mean no metal I think Its the 17th and 18th

hope this could help a bit.

2. How will the equilibrium shift if the following changes are made? State if the reaction will shift
to the left or right and explain why it will shift in that direction.
PCl5 () + heat ⇌ PCl3 () + Cl2 ()

a. Temperature is increased
b. pressure is increased
Cl2 is added
d. PCl3 is removed as it is formed
3. How will the equilibrium shift if the following changes are made? State if the reaction will shift
to the left or right and explain why it will shift in that direction. (10 points each. 5 points for
correct answer, 5 points for correct explanation)
H2 () + Cl2 () ⇌ 2HCl() + heat
a. Heat is removed
b.Cl2 is added
d. PCl3 is removed as it is formed
3. How will the equilibrium shift if the following changes are made? State if the reaction will shift
to the left or right and explain why it will shift in that direction.
H2 () + Cl2 () ⇌ 2HCl() + heat
a. Heat is removed
b.HCl is added
c. H2 is added
d. Pressure is decreased
Use the reaction below to answer the following questions.
2NO2 ()⇌N2O4 ()
a. What is the expression for the equilibrium constant, Keq, for the reaction?
b. If there are 0.400 moles of N2O4 and 0.500 moles of NO2 in a 1.00 L flask at equilibrium at 20°C, what is the Keq?

Answers

Please give me brainleist. :)

Answer:

2a. If the temperature is increased, the reaction will shift to the right in an attempt to release some of the heat. As the forward reaction loses heat while the reverse would create more heat.

2b. If the pressure is increased, it would shift to the left to counteract the increase in pressure as the left side will have fewer molecules.

2c. If Cl2 is added the reaction will shift to the left in order to remove the stress of the extra Cl2 and favor the production of more reactant.

2d. If PCl3 is removed, the reaction will shift to the right. When part of the equation is removed the reaction learns to adapt to the loss by trying to make more Pcl3 and counteract the effects of losing the PCl3.

3a. The reaction will shift to the right to produce more heat and counter the negative effects of losing the heat.

3b. It will shift to the left to get rid of the excess HCl being produced and form more reactant from the breakdown of the HCl.

3c. It would shift to the right in order to get rid of the excess form products from it.

3d. If pressure is decreased there will be no effect on the shift of the reaction because there is an even amount of moles of gas on each side.

4a. K=[N2O4(g0] / [NO2(g)]2

4b. (Below)

K=[N2O4(g)] / [NO2(g)]2

0.4 / 0.5(2)

0.4/0.25 = 1.6

Keq= 1.6


3)
:NEN:
How many nonbonding electrons are on each nitrogen atom?
A)
0
B)
2
c)
4
D)
6
4)
-))

Answers

Answer:

your answer is C

Explanation:

The electron-dot structure of NH3 places one set of nonbonding electrons in the valence shell of the nitrogen atom. that means there are three bonded atoms and one single pair for a coordination number of four surrounding  the nitrogen, the same occurs in water to. along with the Lewis dot structure for ammonia, NH3. the non bonding atoms are basically like hydrogen atoms the try to refuse to bond and they can't be fused unless the right conditions are met.

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