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Sloan [31]
3 years ago
5

Can i have help? with 1-7?

Chemistry
2 answers:
iogann1982 [59]3 years ago
3 0
1 is C. 2 is C. 3 is D. 4 is B. 5 is D. 6 is C. 7 is A.
lidiya [134]3 years ago
3 0
#1. What does an electric current produce?
    :  b. a magnetic field

#2. What strengthens a magnetic field made by a current carrying wire?      : c. An electromagnet with a solenoid

#3. What uses an electromagnet to measure electric current?
       : c. galvanometer

#4. Electromagnet : a coil of wire with an electric current

#5. Electric motor: a device that converts electric energy to mechanical         energy

#6. Solenoid: a coil that has an iron core and thst acts as a magnet when an electric current is in a coil

#7. Electromagnetism: the interaction between electricity and magnetism 

Hope I helped!
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Which principal energy level of an atom contains an electron with the lowest energy?
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The answer is a.n=1 because it makes sence
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3.25*10^25 atoms of neon gas equals how many moles of neon gas?
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Mole<span>: the amount of a substance that contains 6.02 x </span>10<span>. 23 respective particles of that substance. Avogadro's number: 6.02 x </span>10<span>. 23. Molar Mass: the mass of one </span>mole<span> of an element. CONVERSION FACTORS: 1 </span>mole<span> = 6.02 x </span>10<span>. 23 </span>atoms<span> 1 </span>mole<span> = </span>atomic<span> mass (g). Try: 1. How </span>many atoms<span> are in 6.5</span>moles<span> of zinc</span>
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What is 155.4g÷8.70mL, rounded to the correct number of significant figures
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17.9g/ml

Explanation:

5 0
3 years ago
How many atoms of hydrogen are in 0.56 mol of (NH4)2SO4
BabaBlast [244]
<h2>Answer:2.7\times 10^{24} atoms</h2>

Explanation:

The given formula of the compound is (NH_{4})_{2}SO{4}

The formula says

Every mole of (NH_{4})_{2}SO{4} contains 8 moles of atoms of hydrogen.

Given that number of moles of compound is 0.56

So,the number of moles of hydrogen atoms present is 0.56\times 8=4.48

Since each mole has 6.022\times 10^{23} atoms,

4.48 moles has 4.48\times 6.022\times 10^{23}=2.7\times 10^{24} atoms.

7 0
3 years ago
1.Using the absorbance of the spinach extract and the equation of the trendline, determine the concentration of the extract solu
lys-0071 [83]

Answer:

Explanation:

From the given information:

We are to make use of the spinach absorbance extract which is the corrected absorbance  (y) = 0.306

And also the trendline equation:

y = 1609x + 0.0055

where,

x = absorbance of the spinach extract.

∴

0.306 = 1609x + 0.0055

collecting the like terms

0.306 - 0.0055 = 1609x

0.3005  = 1609x

x = 0.3005/1609

x = 1.8676 × 10⁻⁴

x ≅ 0.0002 M

No. of grams for the chlorophyll can be computed as follows:

recall that:

molar mass of chlorophyll = 893.5 g/mol

the volume = 25ml = (25/1000) L = 0.025 L

∴

In spinach solution, the no. of grams for the chlorophyll:

= (0.0002) mol/L × (893.5 g/mol) × (0.025) L

= 0.0044675 g

≅ 0.0045 g

In the spinach, the concentration of chlorophyll = no of grams of chlorophyll/ mass of the spinach

= 4.5 mg/0.1876 g

= 23.987 mg/g

≅ 24 mg/g

4 0
3 years ago
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