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katrin2010 [14]
2 years ago
7

Question 9 (1 point)

Chemistry
2 answers:
Bond [772]2 years ago
8 0

Answer:

.

Explanation:

Dependent and Independent variables are variables in mathematical modeling, statistical modeling and experimental sciences. Dependent variables receive this name because, in an experiment, their values are studied under the supposition or demand that they depend, by some law or rule, on the values of other variables.

Kaylis [27]2 years ago
6 0

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

The Independent variable here is ~

  • time

And the dependent variable is ~

  • score on the final test

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What is the name of this element?
Strike441 [17]

Answer:

Tungsten

Explanation:

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3 years ago
what volume of hydrogen gas is evolved from a reaction between 0.52 g of Na and water? This gas is collected at 20 C and 745mmHg
guapka [62]
The  volume of  hydrogen  gas  that evolved  is   calculated  as  follows
by  use  of   ideal  gas  equation

that  is  PV = nRT
P=745  mm hg
V= ?
R(gas  constant)= 62.36 L.mm hg/mol.k
T= 20 + 273 = 293 k
n=number  of  moles which is calculated as  follows
find the  moles  of Na  used
= 0.52/23=0.023  moles

write the reacting equation
2Na +2H2O =2NaOH +H2
by  use  of reacting  ratio  between  Na : H2  which  is  2:1  therefore  the mole  of H2 = 0.023/2 =0.0115  moles

by  making  the  volume  the   subject  of  the formula
v=nRT/P
V= (0.0115 x 62.36  x 293) / 745  = 0.283 L


6 0
2 years ago
9.31x10<br> ? x 10<br> What’s the other number
miskamm [114]

Answer:

93.1

Explanation:

3 0
3 years ago
The half-life of the radioactive isotope magnesium-20 is 0.600 seconds.
Afina-wow [57]

It will take less 1.8 seconds for the mass of a sample of magnesium-20 to decay from 65.6 micrograms to 8.20 micrograms.

<h3>What is Half-Life of radioactive a radioactive substance?</h3>

The half-life of a radioactive element is the time for half the amount of a sample of the substance to decay.

After 0.6 seconds 31.25 remains

After 1.2 seconds, 15.625 remains

After 1.8 seconds, 7.9 micrograms remains.

In conclusion, it will take less 1.8 seconds for the sample to decay to 8.20 micrograms.

Learn more about Half-Life at: brainly.com/question/2320811

#SPJ1

3 0
1 year ago
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1. Newton’s second law of motion describes the relationship between force, mass, and acceleration. Write the equation.
rjkz [21]

Answer:

F=ma where F = force in N, m = mass in g and a = acceleration in m/s^{2}

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