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Novosadov [1.4K]
2 years ago
11

Which element has 47 protons?

Chemistry
2 answers:
xz_007 [3.2K]2 years ago
6 0
The answer is silver :)
Naya [18.7K]2 years ago
4 0

Answer:

silver

Explanation:

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WILL MARK BRAINLIEST! After this I have 1 more. PLZ HELP!_!
Vitek1552 [10]

Answer:

A.

Explanation:

The pancreas is one of the biggest insulin producers in the body, and testes release, among other hormones, testosterone. :)

3 0
2 years ago
Answer the following question: In a space shuttle, the CO2 that the crew exhales is removed from the air by a reaction within ca
Ulleksa [173]

Answer:

See Explanation

Explanation:

The unbalanced reaction equation is;

CO2(g) + LiOH(aq) + Li2CO3(aq) + H2O(l)

The balanced chemical reaction equation;

CO2(g) + 2LiOH(aq) + Li2CO3(aq) + H2O(l)

The molar mass of each compound is the sum of the relative atomic masses of the atoms of the elements that compose the compounds.

For CO2

12 + 16(2) = 12 + 32 = 44 g/mol

For LiOH

7 + 16 + 1 = 24 g/mol

For Li2CO3

2(7) + 12 + 3(16) = 74 g/mol

For H2O

2(1) + 16 = 18 g/mol

From the balanced chemical reaction equation, the mole ratio is 1:2:1:1. This is obtained from the stoichiometric coefficient of each reactant in the balanced chemical reaction equation.

From the question;

1 mole of CO2 occupies 22.4 L

x moles of CO2 occupies 825 L

x = 1 mole * 825 L/22.4 L

x = 36.8 moles

From the reaction equation;

1 mole of CO2 produces 1 mole of water

36.8 moles of CO2 produces 36.8 moles of water

Mass of 36.8 moles of water = 36.8 moles * 18 g/mol

= 662 g of water

The answer must have three significant figures because that is the same number of significant figures to which values were given in the question.

6 0
2 years ago
Enough water was added to ten grams of sugar
vfiekz [6]

Answer:

25 grams (25g) of sugar

Explanation:

We can set this up algebraically:

10g = 2L

÷ 2    ÷ 2

5g = L

meaning that 5 g are needed to make 1 L

So, if we have 5 L, we will need (5 × 5) 25 grams to produce the same concentration.

6 0
2 years ago
a gas at 155 kPa and 25 degrees C occupies a container with an initial volume of 1.00 L. By changing the volume, the pressure of
Ne4ueva [31]
First thing, you convert from kPa to Pa. Then, you find the atm value of the Pa you got.

155 kPa = 155 000 Pa
1 atm = 101 325 Pa
x atm = 155 000 Pa
You divide 101 325 over 155 000 and you get about 1.53
So, 155 000 Pa = 1.53 atm.
So, T (temperature) = 25 + 273 = 298

605 kPa = 605 000 Pa
1 atm = 101 325 Pa
x atm = 605 000 Pa
You divide 605 000 over 101 325 and you get about 5.97 
So 605 000 Pa = 5.97 atm
So, T = 125 + 273 = 398

P1 * V1/T1 = P2 * V2/T2
1.53 * 1/298 = 5.97 * V2/398
You calculate ad you get V2 = 0.342 L

Hope this Helps :)
8 0
3 years ago
Read 2 more answers
Help please ASAP 10 point
charle [14.2K]
6a. physical reaction
6b. endothermic reaction
7a. physical reaction
7b. the reactants are carbon dioxide, water and light energy. the product is starch
7c. exothermic reaction
5 0
3 years ago
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