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vodka [1.7K]
3 years ago
8

EXPLAIN THE SOLAR ECLIPSE

Chemistry
2 answers:
Mice21 [21]3 years ago
8 0
The answer to this question is:

<span>EXPLAIN THE SOLAR ECLIPSE

"When the sun Hidden behind the moon and this happens Once every 18 months"

Hoped This Helped, FAUSTINA
Your Welcome :)</span>
ELEN [110]3 years ago
3 0
It's when the moon blocks the sun from shine to earth, because they are lined up, otherwise it's when the planet, sun, moon are in a line
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3. Round 87.073 meters to three significant figures. Write your answer in scientific notation. Step 1: 87.073 rounds to _______
Nat2105 [25]

Answer:

see below

Explanation:

3.  87.073 meters to three significant figures.

  = 87.1 meters

2.  Write the number in scientific notation. _____meters​

   = 8.71 x 10 ¹  meters

6 0
3 years ago
Read 2 more answers
How many grams of Br are in 345g of CaBr2?
nadya68 [22]

Answer:

276g of Br are present

Explanation:

To solve this question we need to find the moles of CaBr2 using its molar mass -CaBr2: 199.89g/mol-. As 1 mole of CaBr2 contains 2 moles of Br we can find the moles of Br and its mass:

<em>Moles CaBr2:</em>

345g * (1mol/199.89g) = 1.7259 moles CaBr2

<em>Moles Br:</em>

1.7259 moles CaBr2 * (2mol Br / 1mol CaBr2) = 3.4519 moles Br

<em>Mass Br -Molar mass: 79.904g/mol-</em>

3.4519 moles Br * (79.904g/mol) = 276g of Br are present

4 0
3 years ago
How many moles are there in 24.00 g of NaCl
Elis [28]

Answer:

The answer to your question is 0.41 moles

Explanation:

Data

moles of NaCl = ?

mass of NaCl = 24 g

Process

To solve this problem just calculate the molar mass of NaCl, and remember that the molar mass of any substance equals to 1 mol.

1.- Calculate the molar mass

NaCl = 23 + 35.5 = 58.5 g

2.- Use proportions and cross multiplication

               58.5 g of NaCl ------------------- 1 mol

               24.0 g               ------------------- x

                     x = (24 x 1) / 58.5

                     x = 0.41 moles

6 0
3 years ago
How many moles of HCl are needed to completely react with 50.0 mL of 0.250 M NaOH solution? Group of answer choices 1.25 × 10-2
Lynna [10]

Answer:

k

Explanation:

7 0
4 years ago
What mass of ammonia, NH3, is necessary to react with 2.1 x 10^24 molecules of oxygen in the following reaction? 4NH3(g) + 7O2(g
liubo4ka [24]
33.94 
multiply 17.031*1.993
4 0
4 years ago
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