1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
azamat
3 years ago
10

An 84.84 g sample of steel is added to a 100-ml graduated cylinder with 45.0 ml of water. if the resulting water level is 55.5 m

l, what is the volume of the steel?
Chemistry
2 answers:
Elden [556K]3 years ago
6 0
The volume of the steel that is described above is obtained by water displacement method. This means that the volume can be calculated by subtracting the initial volume from the final volume. This will give us an answer of,
                             volume of steel = 55.5 mL - 45 mL = 10.5 mL

o-na [289]3 years ago
5 0

Answer:

10.5 mL

Explanation:

This is related to the Archimedes principle which stated that “A body submerged in a fluid at rest experiences an upward vertical thrust equal to the weight of the volume of fluid dislodged by the body." Or in simpler words, the volume of the fluid displaced is equal to the volume of the body submerged in it. So, the volume displaced is:

Volume displaced = 55.5 mL – 45.0 mL = 10.5 mL

Then, the volume of the steel is 10.5 mL

You might be interested in
Classify each of the reactants as a limiting reactant or an excess reactant for a reaction starting with five moles of each reac
matrenka [14]
In order to determine if a reactant is in excess or limiting, we must first know the required amount of reactants. This is referred to as the stoichometric amount of reactant, and it is obtained from the chemical equation.
From the equation, we form a ratio of the reactants. The reactant supplied in excess of that ratio is the excess reactant, while the other is the limiting reactant.
7 0
3 years ago
Which of the following is NOT<br> necessary to define a coordinate<br> system?
gulaghasi [49]

Answer:

i think that its A,C,D

Explanation:

hope this helps

8 0
2 years ago
if the chromosome number in the sporophyte generation of a plant is 32 what is its number in the gametophyte generation?
xz_007 [3.2K]

Chromosomes have hereditary function that are capable of self-duplication and they have thread-like structures seen inside the nucleus of plant and animal. In plants, they go through a cycle called alteration of generation that has multicellular stages. One is sporophyte that is a diploid, and the other is gametophyte with a haploid.

<span>Moreover, spores are produce through meiosis so it go through a process of chromosome reduction in order to create a haploid spores. While, gametes undergo mitosis and the structure is already a haploid, which means that the number of chromosomes will not change in order to produce haploid. In this case, the plant have both spores and gametes and the similarities is that, they are both singles celled and a haploid. Therefore, the number of the chromosome in the gametophyte generation is also 32.</span>

3 0
3 years ago
The Environmental Protection Agency has determined that safe drinking
dmitriy555 [2]

Answer:

b) \bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}

The confidence interval for this case is given (6.21, 6.59)

So we can conclude at 95% of confidence that the true mean for the PH concentration is between 6.21 and 6.59 moles per liter

c) Since the confidence interval not contains the value 7 we reject the hypothesis that the true mean is equal to 7. And the same result was obtained with the t test for the true mean.

Explanation:

We assume that part a is test the claim. And we can conduct the following hypothesis test:

Null hypothesis: \mu =7

Alternative hypothesis \mu \neq 7

The statistic is to check this hypothesi is given by:

t = \frac{\bar X -\mu}{\frac{s}{\sqrt{n}}}

We know the following info from the problem:

\bar X = 6.4 , s=0.5, n =30

Replacing we got:

t = \frac{6.4-7}{\frac{0.5}{\sqrt{30}}}= -6.573

And the p value would be:

p_v= 2*P(Z

Since the p value is very low compared to the significance assumed of 0.05 we have enough evidence to reject the null hypothesis that the true mean is equal to 7 moles/liter

Part b

The confidence interval is given by:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}

The confidence interval for this case is given (6.21, 6.59)

So we can conclude at 95% of confidence that the true mean for the PH concentration is between 6.21 and 6.59 moles per liter

Part c

Since the confidence interval not contains the value 7 we reject the hypothesis that the true mean is equal to 7. And the same result was obtained with the t test for the true mean.

6 0
3 years ago
calculate the molar mass of nickel (iii)oxide to the nearest tenth place. Give both the numerial value and the units
maksim [4K]
Nickel (Ni) has the charge as +3 while oxygen (O) has -2. Hence, the chemical formula for the nickel (iii) oxide is Ni₂O₃. 

molar mass of Ni = 58.69 g/mol
molar mass of O = <span>15.99 g/mol

number of Ni atoms in </span>Ni₂O₃ = 2
Molar mass of Ni in Ni₂O₃ = 2 x 58.69 g/mol = 117.38 g/mol

number of O atoms in Ni₂O₃ = 3
Molar mass of O in Ni₂O₃  = 3 x 15.99 g/mol = 47.97 g/mol


Hence, molar mass of compound = 117.38 g/mol + 47.97 g/mol
                                                          = 165.35 g/mol
                                                          =
<span> 165.4 g/mol</span>
8 0
4 years ago
Other questions:
  • PLEASE HELP! GIVING 22 POINTS!
    15·2 answers
  • carboxylic acid can react with an inorganic chloride to make an acid anhydride or acid chloride. Does it matter which chloride w
    15·2 answers
  • a. Which has a greater density, milk or magnesium? b. If you threw a piece of coal into a container of milk, would it float or s
    8·1 answer
  • A syringe containing 1.63 mL of oxygen gas is cooled from 91.0 ∘C to 0.9 ∘C. What is the final volume Vf of oxygen gas? (Assume
    8·2 answers
  • Compare the type of bonds in metalloids to metal (delocalized) and nonmetal (localized).
    10·1 answer
  • Caproic acid, responsible for the odor of dirty socks, is composed of C, H, and O atoms. Combustion of a 0.225-g sample of this
    7·1 answer
  • In one to two sentences, explain a similarity and a difference between the particles in liquid water at 100ºC and the particles
    14·1 answer
  • The formation constant* of [M(CN) 4 ]2− is 7.70 × 10 16 , where M is a generic metal. A 0.150 mole quantity of M(NO3)2 is added
    13·1 answer
  • Question is in the photo​
    6·1 answer
  • SOLVE FAST....⚡⚡⚡
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!