Answer: 1.9 x 10^4
Explanation:
A dog has a mass of 19 kg. The mass of the dog in grams, expressed in scientific notation, is 1.95 × 10⁴ g.
What is mass?Mass is the quantity of matter in a physical body. The product of the compound's molar mass and the substance's moles are defined as mass.
Measuring units to determine the size, weight, or quantity of any object. Seven fundamental measurement units are utilized in daily life and across the globe.
These units of measurement are the meter, which is used to measure distance, and the second, which is used to measure. Grams and kilograms are the measuring units that are used to measure the quantity of a solid item.
The mass of the dog in grams is:
1 kilogram = 1000 grams
19.5 kg × (10³ g/1 kg) = 1.95 × 10⁴ g.
Thus, the mass of the dog in grams is 1.95 × 10⁴ g.
To learn more about mass, refer to the link:
https://brainly.com/question/493592
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12. (01.06 LC)
Which of the following is a property of a pure substance? (5 points)
It consists of different types of compounds.
It may have substances in different states of matter,
It is made up of a single element or type of compound,
Its components can be separated by employing physical methods.
Answer:
3rd one
Explanation:
dont have one, i think just think it makes most sense
Answer:It is made up of a single element or type of compound
Explanation: This answer is right because for something to be pure it has to only be made up of 1 thing.
The melting and boiling points of a group of elements decrease as you go down the group, while their reactivity increases.
a.. Are the elements from the first group or the second last group of the Periodic Table?
b ..Does this group consist of metals, metalloids, non-metals or a mix?
c.. Identify two elements in this group.
Answer:
a) first group
b) metals
c) K - potassium, Li - lithium
Explanation:
a) they are the alkali metals
b) they're alkali metals lol
c) just look at a periodic table :P
Match each term with its definition.
a. The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system.
b. A molecule that donates a proton when it encounters a proton acceptor.
c. Occurs when a reaction involving an acid and its conjugate base is combined with a second reaction involving a base and its conjugate acid.
d. It ionizes completely when dissolved in water.
e. The shift in the position of equilibrium caused by the addition of a participating ion.
f. It only partially ionizes when dissolved in water.
g. It is capable of acting as either an acid or a base depending upon the solute.
h. The act of self-ionization of a solvent to produce both a conjugate acid and a conjugate base.
i. A chemical species that bears both positive and negative charges.
1. Week electrolyte
2. Bronsted-Lowry acid
3. Neutralization
4. Amphoteric solvent
5. Zwitterion
6. Auto-protolysis
7. Strong acid
8. Le Chåtelier's principle
9. Common effect
Answer:
The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system -Le Chåtelier's principle
A molecule that donates a proton when it encounters a proton acceptor.- Bronsted-Lowry acid
Occurs when a reaction involving an acid and its conjugate base is combined with a second reaction involving a base and its conjugate acid.- Neutralization
It ionizes completely when dissolved in water.- Strong acid
The shift in the position of equilibrium caused by the addition of a participating ion.- Common ion effect
It only partially ionizes when dissolved in water.- Weak electrolyte
It is capable of acting as either an acid or a base depending upon the solute- Amphoteric solvent
The act of self-ionization of a solvent to produce both a conjugate acid and a conjugate base.- Auto-protolysis
A chemical species that bears both positive and negative charges.- Zwitterion
Explanation:
In the answer box we have various chemical terminologies and their definitions. In answering the question, you must carefully read through each definition, then check what option best matches that definition from the options provided.
Each definition applies only to one terminology as you can see in the answer above.
How many grams of F are in 225 g CaF2?
Answer:
109.575
Explanation:
what is the energy level of aluminum
Answer:
Three energy levels
The Bohr model for aluminum shows its thirteen protons and neutrons inside the nucleus, with thirteen electrons orbiting in three energy levels.
Write the balanced chemical equation for the decomposition of sulfur trioxide to sulfur dioxide and
oxygen.
Answer:
The balanced equation is 2SO2+O2→2SO3 .
The state of matter of a material depends on its
O A) density
OB) temperature
O C) volume
OD) weight
Answer:
Tempature
Explanation:
Matter can move between any two states (or phases) of matter depending on the pressure and temperature conditions. ... The temperature of the melting and boiling points depend on the identity of the substance and the atmospheric pressure.
Also apex.
Answer:
temperature
Explanation:
an example here
ice
when its cold ice tends to stay as a solid but as the temperature rises the ice melts and turns into a liquid... with more heat the water will turn into gas
Nervous tissue transmits messages throughout the human body by
contracting.
providing protection.
conducting impulses.
absorbing vital nutrients.
Answer: conducting impulses
Explanation:
just did it on edge
Answer:
c. conducting impulses.
Explanation:
got it right on edg, hope this helps!
What type of bond is present between Magnesium and Fluoride in MgF2?
Answer: Ionic Bond
Explanation:
Ionic compounds are created by bonding a metal and non-metal
Mg is a metal
Fluoride is a non-metal
__Hgo > __Hg + __O2?
Hg + O2 → HgO
✅Word equation: Mercury + Oxygen gas → Mercury (II) oxide
✅ Type of Chemical Reaction: For this reaction we have a combination reaction.
✅ Balancing Strategies: To balance this equation it's probably easiest to begin by changing the coefficient in front of the HgO.
This is a combination reactions because the mercury (Hg) plus the oxygen gas (O2) come together to form the Mercury (II) oxide (MgO).
Hint-1
Hint-2
IamSugarBee
how did domestication of early crops start?
Answer:
In the Fertile Crescent in the Middle East, cereal crops were first domesticated about 11,000 years ago. Generally, the first domesticated crops were annuals with big seeds or fruits. ... Humans began to transition from a hunter-gatherer culture to a settled farming society as domestication took place.
Please mark me brainliest!
Hope this helps God bless!
is a dolerite a mineral or a rock
Answer:
rock is the correct answer
Explanation:
Answer: here's the thing: rocks are minerals.Well, made out of them. so you can say that dolerite is a rock, but it is made out of minerals
Explanation:
18. Which of these is an ion?
A. Fluorine with 9 protons
B. Calcium with 18 electrons
C. Calcium with 18 neutrons
D. Fluorine with 9 neutrons
what is heavier 1 pound of bricks or 1 pound of feathers
Answer:
They are both the same.
Explanation:
ONE POUND of feathers
ONE POUND of brick
Answer:
They are both the same
Explanation:
Even though feathers are lighter they are both 1 pound. Why do you have so many feathers?!?!?
What is the volume of 26.1 g of a substance if the density of the substance is 0.28 g/mL?
Answer:
It is 93.2
Explanation:
It's that answer because if you divide volume and density that's what you get
what is the formula for zinc sulfide
Answer:
the formula for zinc sulfide is b. ZnS
FILL IN THE BLANKS ASAP 40 POINTS AND BRAINLIST
Answer:
1.) land
2.) water
3.) warmer
4.) rises
5.) sea
Explanation:
Hot air rises, and land heats up first.
Answer:
Here are the answers:
1.) land
2.) water
3.) warmer
4.) rises
5.) sea
Explanation:
During a day at the beach, the land heats up faster than the water. Because of this, the air over land rises over the land and the cooler, more dense air, blows into the ocean, creating a sea breeze.
How many grams of glycine amide should be added to 1.00 g of glycine amide hydrochloride to give 100 mL of solution with pH 8.00
Answer:
0.4235 g of glycine amide should be added
Explanation:
From the given information:
The equation of the reaction can be illustrated as:
[tex]BH^+ \to B^+ + H ^-[/tex]
where:
mass of glycine amide hydrochloride = 1.00 g
Suppose x be the amount of (in grams) of glycine amide that is required to be added; Then:
[tex][BH^+] = \dfrac{1.00 \ g}{110.54 \ gmol \times 0.100 L}[/tex]
[tex][BH^+]=[/tex] 0.0905 M
So, For [B} i.e, for glycine amide
[tex][B] = \dfrac{x \ g}{74.083 \ gmol \times 0.100 L}[/tex]
[B] = 0.135x M
∴
[tex]\dfrac{[B]}{[BH^+]}=\dfrac{0.135x \ M}{0.0905 \ M }}[/tex]
[tex]\dfrac{[B]}{[BH^+]}=1.49x[/tex]
The log of the above question can be computed as:
[tex]log _{10}\dfrac{[B]}{[BH^+]}=log _{10}1.49x[/tex]
[tex]pH = pK_a + log _{10} \dfrac{[B]}{[BH^+]}[/tex]
8.00 = 8.20 + [tex]log _{10}(1.49x)[/tex]
8.00 - 8.20 = [tex]log _{10}(1.49x)[/tex]
-0.20 = [tex]log _{10}(1.49x)[/tex]
1.49 x = [tex]10^{-0.20}[/tex]
1.49 x = 0.631
x = 0.631/1.49
x = 0.4235 g
Electrons in the outermost shell of an atom that are available to bond with the electrons of other atoms are
Question 11 options:
A)
cations.
B)
free electrons.
C)
valence electrons.
D)
anions.
Question 12 (5 points)
Main group elements have valence electrons in which suborbitals?
Question 12 options:
A)
d and f
B)
s and p
C)
p and f
D)
s and d
Question 13 (5 points)
Molecules have
Question 13 options:
A)
only kinetic energy.
B)
only potential energy.
C)
both potential and kinetic energy.
D)
neither kinetic nor potential energy.
Question 14 (5 points)
The majority of elements are
Question 14 options:
A)
metalloids.
B)
nonmetals.
C)
metals.
D)
inert.
Question 15 (5 points)
A student found the mass of an object to be 26.5 g. To find the volume, the student submerged the object in a graduated cylinder of water. Submerging the object in the water in the graduated cylinder increased the water level by 24.1 mL. The density of the object is
Question 15 options:
A)
1.0906 g/mL.
B)
0.909 g/mL.
C)
1.10 g/mL.
D)
1.1 g/mL.
Answer:
c
Explanation:
definitely
Answer: 11; C
Explanation:
valance electrons
Order: Vitamin K (Aquamephyton) 1 mg IM x 1 dose Newborn: Weight 4 kg Supply: 10mg/mL vial How many mLs would be given
Answer:
Volume(ml) of drug required = 0.1 ml
So, medicine is safe for this child.
Explanation:
Given:
Desired dose (D)= 1 mg
Dose in hand (H) = 10 mg
Quantity (Q) = 1 ml
Computation:
Volume(ml) of drug = [Desired medicine / medicine in hand] Quantity.
Volume(ml) of drug required = [1/10]1
Volume(ml) of drug required = 0.1 ml
So, medicine is safe for this child.
What molar concentration of hydrochloric acid (HCl) is needed to prepare a disinfectant solution with a pH
Answer:
The correct approach is "3.1×10⁻³ M".
Explanation:
As we know,
[tex]pH=-log[H_{3}O^+][/tex]
[tex]pH=2.5[/tex]
[tex][H_{3}O]^+= \ ?[/tex]
Now,
⇒ [tex]-log[H_{3}O]^+=2.5[/tex]
⇒ [tex][H_{3}O]^+=10^{-2.5}[/tex]
⇒ [tex]=3.1\times 10^{-3} \ M[/tex]
So that the needed molar concentration of HCL will be:
= [tex]3.1\times 10^{-3} \ M[/tex]
which gas is the most dense under standard temperature and pressure?
A. H2
B. Ne
C. Ar
D. O2
Answer:
I think it's b: ne
Explanation:
its just a wild guess
Substances which will glow in the dark after being exposed to sunlight are:
radioactive
photosensitive
luminescent
phosphorescent
Answer:
If something glows in the dark it is phosphorescent.
How many atoms of N (nitrogen) are there in 1 mole of NH4Cl?
Answer:
In one mole of NH₄Cl 6.022 × 10²³ atoms of N are present.
Explanation:
Given data:
Number of atoms of N = ?
Number of moles of NH₄Cl = 1 mol
Solution:
First we have to calculate the number of atoms in NH₄Cl .
There is only 1 mole of N in 1 mole of NH₄Cl .
Now we will calculate the number of atoms of nitrogen in one mole of N by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole of N = 6.022 × 10²³ atoms of N
Thus in one mole of NH₄Cl 6.022 × 10²³ atoms of N are present.
Which of the following describe glands? Check all that apply.
a structure that secretes substances through a duct
a thin layer that separates or connects structures inside the body
a structure that secretes hormones into the bloodstream
a structure usually made from connective and epithelial cells
Answer:a, c, d
Explanation: just did it on edge
what is erotic please answer
Answer:
adjective
Explanation:
relating to or tending to arouse sexual desire or excitement.
Answer:
WARNING: THIS IS NOT FOR THE EYES OF KIDS
Explanation:
Its when a man's penis gets excited around women or other men. This is usually called sexual desire and feelings. This only happens to men in their particular area because they might see someone they like or they might just be masturbating alone.
When an objects volume is made smaller and it’s mass remains the same it’s density
an atom has 79 protons, 78 electrons and a mass number of 118. how many neutrons does this atom have
Answer:
39
Explanation:
Electrons weigh almost nothing, so their mass doesn't really matter for these types of problems. Just subtract 118-79 to find the remaining mass which is for the neutrons.
Which is the larger atom S or Mg
Answer:
Mg
Explanation:
If one were comparing just the neutral atoms Mg and S, the S atom would be smaller as both elements are in the same period and sulfur is more to the right
How do I find the hydrated formula?
Answer:
In order to determine the formula of the hydrate, [Anhydrous Solid⋅xH2O], the number of moles of water per mole of anhydrous solid (x) will be calculated by dividing the number of moles of water by the number of moles of the anhydrous solid (Equation
Explanation: